diff --git a/.mailmap b/.mailmap
index 2643b7203a745283d7f0e655f22966939e5ba3a4..43031441b2d922b3126b26ba754ea748a3f63540 100644
--- a/.mailmap
+++ b/.mailmap
@@ -95,6 +95,7 @@ Ben M Cahill <ben.m.cahill@intel.com>
Ben Widawsky <bwidawsk@kernel.org> <ben@bwidawsk.net>
Ben Widawsky <bwidawsk@kernel.org> <ben.widawsky@intel.com>
Ben Widawsky <bwidawsk@kernel.org> <benjamin.widawsky@intel.com>
+Benjamin Poirier <benjamin.poirier@gmail.com> <bpoirier@suse.de>
Bjorn Andersson <andersson@kernel.org> <bjorn@kryo.se>
Bjorn Andersson <andersson@kernel.org> <bjorn.andersson@linaro.org>
Bjorn Andersson <andersson@kernel.org> <bjorn.andersson@sonymobile.com>
@@ -128,6 +129,7 @@ Christian Brauner <brauner@kernel.org> <christian.brauner@ubuntu.com>
Christian Marangi <ansuelsmth@gmail.com>
Christophe Ricard <christophe.ricard@gmail.com>
Christoph Hellwig <hch@lst.de>
+Claudiu Beznea <claudiu.beznea@tuxon.dev> <claudiu.beznea@microchip.com>
Colin Ian King <colin.i.king@gmail.com> <colin.king@canonical.com>
Corey Minyard <minyard@acm.org>
Damian Hobson-Garcia <dhobsong@igel.co.jp>
@@ -568,6 +570,7 @@ Takashi YOSHII <takashi.yoshii.zj@renesas.com>
Tamizh Chelvam Raja <quic_tamizhr@quicinc.com> <tamizhr@codeaurora.org>
Taniya Das <quic_tdas@quicinc.com> <tdas@codeaurora.org>
Tejun Heo <htejun@gmail.com>
+Tomeu Vizoso <tomeu@tomeuvizoso.net> <tomeu.vizoso@collabora.com>
Thomas Graf <tgraf@suug.ch>
Thomas Körper <socketcan@esd.eu> <thomas.koerper@esd.eu>
Thomas Pedersen <twp@codeaurora.org>
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 15eca804239edc8d46ead8f21e77990352f5d3d3..b01cac05bd4ccde251c3dcccea50f737f0d57028 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -1010,7 +1010,8 @@ static void __init reserve_crashkernel(void)
total_mem = get_total_mem();
ret = parse_crashkernel(boot_command_line, total_mem,
- &crash_size, &crash_base);
+ &crash_size, &crash_base,
+ NULL, NULL);
/* invalid value specified or crashkernel=0 */
if (ret || !crash_size)
return;
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 6062a52a084ffff5b3d94b290b7fdd8846b44293..7b071a00425d2b833bc79dd0413bafaaeb94c19a 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1498,6 +1498,9 @@ config ARCH_DEFAULT_KEXEC_IMAGE_VERIFY_SIG
config ARCH_SUPPORTS_CRASH_DUMP
def_bool y
+config ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
+ def_bool CRASH_CORE
+
config TRANS_TABLE
def_bool y
depends on HIBERNATION || KEXEC_CORE
diff --git a/arch/arm64/include/asm/crash_core.h b/arch/arm64/include/asm/crash_core.h
new file mode 100644
index 0000000000000000000000000000000000000000..9f5c8d339f44f5440d822ef64b277bb85d92833f
--- /dev/null
+++ b/arch/arm64/include/asm/crash_core.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef _ARM64_CRASH_CORE_H
+#define _ARM64_CRASH_CORE_H
+
+/* Current arm64 boot protocol requires 2MB alignment */
+#define CRASH_ALIGN SZ_2M
+
+#define CRASH_ADDR_LOW_MAX arm64_dma_phys_limit
+#define CRASH_ADDR_HIGH_MAX (PHYS_MASK + 1)
+#endif
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 8deec68028ac7ecddd3677a9e517565847540853..74c1db8ce271d8c5b0ea19dda0dbf7d3fa5f5230 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -65,15 +65,6 @@ EXPORT_SYMBOL(memstart_addr);
*/
phys_addr_t __ro_after_init arm64_dma_phys_limit;
-/* Current arm64 boot protocol requires 2MB alignment */
-#define CRASH_ALIGN SZ_2M
-
-#define CRASH_ADDR_LOW_MAX arm64_dma_phys_limit
-#define CRASH_ADDR_HIGH_MAX (PHYS_MASK + 1)
-#define CRASH_HIGH_SEARCH_BASE SZ_4G
-
-#define DEFAULT_CRASH_KERNEL_LOW_SIZE (128UL << 20)
-
/*
* To make optimal use of block mappings when laying out the linear
* mapping, round down the base of physical memory to a size that can
@@ -101,140 +92,25 @@ phys_addr_t __ro_after_init arm64_dma_phys_limit;
#define ARM64_MEMSTART_ALIGN (1UL << ARM64_MEMSTART_SHIFT)
#endif
-static int __init reserve_crashkernel_low(unsigned long long low_size)
-{
- unsigned long long low_base;
-
- low_base = memblock_phys_alloc_range(low_size, CRASH_ALIGN, 0, CRASH_ADDR_LOW_MAX);
- if (!low_base) {
- pr_err("cannot allocate crashkernel low memory (size:0x%llx).\n", low_size);
- return -ENOMEM;
- }
-
- pr_info("crashkernel low memory reserved: 0x%08llx - 0x%08llx (%lld MB)\n",
- low_base, low_base + low_size, low_size >> 20);
-
- crashk_low_res.start = low_base;
- crashk_low_res.end = low_base + low_size - 1;
- insert_resource(&iomem_resource, &crashk_low_res);
-
- return 0;
-}
-
-/*
- * reserve_crashkernel() - reserves memory for crash kernel
- *
- * This function reserves memory area given in "crashkernel=" kernel command
- * line parameter. The memory reserved is used by dump capture kernel when
- * primary kernel is crashing.
- */
-static void __init reserve_crashkernel(void)
+static void __init arch_reserve_crashkernel(void)
{
- unsigned long long crash_low_size = 0, search_base = 0;
- unsigned long long crash_max = CRASH_ADDR_LOW_MAX;
+ unsigned long long low_size = 0;
unsigned long long crash_base, crash_size;
char *cmdline = boot_command_line;
- bool fixed_base = false;
bool high = false;
int ret;
if (!IS_ENABLED(CONFIG_KEXEC_CORE))
return;
- /* crashkernel=X[@offset] */
ret = parse_crashkernel(cmdline, memblock_phys_mem_size(),
- &crash_size, &crash_base);
- if (ret == -ENOENT) {
- ret = parse_crashkernel_high(cmdline, 0, &crash_size, &crash_base);
- if (ret || !crash_size)
- return;
-
- /*
- * crashkernel=Y,low can be specified or not, but invalid value
- * is not allowed.
- */
- ret = parse_crashkernel_low(cmdline, 0, &crash_low_size, &crash_base);
- if (ret == -ENOENT)
- crash_low_size = DEFAULT_CRASH_KERNEL_LOW_SIZE;
- else if (ret)
- return;
-
- search_base = CRASH_HIGH_SEARCH_BASE;
- crash_max = CRASH_ADDR_HIGH_MAX;
- high = true;
- } else if (ret || !crash_size) {
- /* The specified value is invalid */
+ &crash_size, &crash_base,
+ &low_size, &high);
+ if (ret)
return;
- }
-
- crash_size = PAGE_ALIGN(crash_size);
-
- /* User specifies base address explicitly. */
- if (crash_base) {
- fixed_base = true;
- search_base = crash_base;
- crash_max = crash_base + crash_size;
- }
-
-retry:
- crash_base = memblock_phys_alloc_range(crash_size, CRASH_ALIGN,
- search_base, crash_max);
- if (!crash_base) {
- /*
- * For crashkernel=size[KMG]@offset[KMG], print out failure
- * message if can't reserve the specified region.
- */
- if (fixed_base) {
- pr_warn("crashkernel reservation failed - memory is in use.\n");
- return;
- }
-
- /*
- * For crashkernel=size[KMG], if the first attempt was for
- * low memory, fall back to high memory, the minimum required
- * low memory will be reserved later.
- */
- if (!high && crash_max == CRASH_ADDR_LOW_MAX) {
- crash_max = CRASH_ADDR_HIGH_MAX;
- search_base = CRASH_ADDR_LOW_MAX;
- crash_low_size = DEFAULT_CRASH_KERNEL_LOW_SIZE;
- goto retry;
- }
-
- /*
- * For crashkernel=size[KMG],high, if the first attempt was
- * for high memory, fall back to low memory.
- */
- if (high && crash_max == CRASH_ADDR_HIGH_MAX) {
- crash_max = CRASH_ADDR_LOW_MAX;
- search_base = 0;
- goto retry;
- }
- pr_warn("cannot allocate crashkernel (size:0x%llx)\n",
- crash_size);
- return;
- }
-
- if ((crash_base >= CRASH_ADDR_LOW_MAX) && crash_low_size &&
- reserve_crashkernel_low(crash_low_size)) {
- memblock_phys_free(crash_base, crash_size);
- return;
- }
-
- pr_info("crashkernel reserved: 0x%016llx - 0x%016llx (%lld MB)\n",
- crash_base, crash_base + crash_size, crash_size >> 20);
-
- /*
- * The crashkernel memory will be removed from the kernel linear
- * map. Inform kmemleak so that it won't try to access it.
- */
- kmemleak_ignore_phys(crash_base);
- if (crashk_low_res.end)
- kmemleak_ignore_phys(crashk_low_res.start);
- crashk_res.start = crash_base;
- crashk_res.end = crash_base + crash_size - 1;
- insert_resource(&iomem_resource, &crashk_res);
+ reserve_crashkernel_generic(cmdline, crash_size, crash_base,
+ low_size, high);
}
/*
@@ -480,7 +356,7 @@ void __init bootmem_init(void)
* request_standard_resources() depends on crashkernel's memory being
* reserved, so do it here.
*/
- reserve_crashkernel();
+ arch_reserve_crashkernel();
memblock_dump_all();
}
diff --git a/arch/loongarch/kernel/setup.c b/arch/loongarch/kernel/setup.c
index aed65915e932e2963913ac2b4ada44102eed9e32..b35186f7b2547afd85a9e4224b966fb6ed00fdc8 100644
--- a/arch/loongarch/kernel/setup.c
+++ b/arch/loongarch/kernel/setup.c
@@ -267,7 +267,9 @@ static void __init arch_parse_crashkernel(void)
unsigned long long crash_base, crash_size;
total_mem = memblock_phys_mem_size();
- ret = parse_crashkernel(boot_command_line, total_mem, &crash_size, &crash_base);
+ ret = parse_crashkernel(boot_command_line, total_mem,
+ &crash_size, &crash_base,
+ NULL, NULL);
if (ret < 0 || crash_size <= 0)
return;
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index cb871eb784a7c12819666e50bd45cd576bc0e363..08321c945ac41021c5f24a02ef033d41cfe67244 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -460,7 +460,8 @@ static void __init mips_parse_crashkernel(void)
total_mem = memblock_phys_mem_size();
ret = parse_crashkernel(boot_command_line, total_mem,
- &crash_size, &crash_base);
+ &crash_size, &crash_base,
+ NULL, NULL);
if (ret != 0 || crash_size <= 0)
return;
diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
index 3ff2da7b120b5090fe041efdebaf359bf2e32348..d14eda1e85896807bdabb61987e4b21f3ee949ea 100644
--- a/arch/powerpc/kernel/fadump.c
+++ b/arch/powerpc/kernel/fadump.c
@@ -313,7 +313,7 @@ static __init u64 fadump_calculate_reserve_size(void)
* memory at a predefined offset.
*/
ret = parse_crashkernel(boot_command_line, memblock_phys_mem_size(),
- &size, &base);
+ &size, &base, NULL, NULL);
if (ret == 0 && size > 0) {
unsigned long max_size;
diff --git a/arch/powerpc/kexec/core.c b/arch/powerpc/kexec/core.c
index de64c7962991214b285626a4cb79b96643c10f56..9346c960b296f65fc81eb999f9048cbddfb2fe21 100644
--- a/arch/powerpc/kexec/core.c
+++ b/arch/powerpc/kexec/core.c
@@ -109,7 +109,7 @@ void __init reserve_crashkernel(void)
total_mem_sz = memory_limit ? memory_limit : memblock_phys_mem_size();
/* use common parsing */
ret = parse_crashkernel(boot_command_line, total_mem_sz,
- &crash_size, &crash_base);
+ &crash_size, &crash_base, NULL, NULL);
if (ret == 0 && crash_size > 0) {
crashk_res.start = crash_base;
crashk_res.end = crash_base + crash_size - 1;
diff --git a/arch/powerpc/mm/nohash/kaslr_booke.c b/arch/powerpc/mm/nohash/kaslr_booke.c
index 2fb3edafe9ab65740ec1dcc7aefc55a71473a0bc..b4f2786a7d2b0be0ad3f064a89d79aad68999bdd 100644
--- a/arch/powerpc/mm/nohash/kaslr_booke.c
+++ b/arch/powerpc/mm/nohash/kaslr_booke.c
@@ -178,7 +178,7 @@ static void __init get_crash_kernel(void *fdt, unsigned long size)
int ret;
ret = parse_crashkernel(boot_command_line, size, &crash_size,
- &crash_base);
+ &crash_base, NULL, NULL);
if (ret != 0 || crash_size == 0)
return;
if (crash_base == 0)
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 9c48fecc671918ed7c77eda92f333e03dbf9f4e3..eaa15a20e6ae1537d14efceeafc3b62bd4273fc5 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -693,6 +693,9 @@ config ARCH_SUPPORTS_KEXEC_PURGATORY
config ARCH_SUPPORTS_CRASH_DUMP
def_bool y
+config ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
+ def_bool CRASH_CORE
+
config COMPAT
bool "Kernel support for 32-bit U-mode"
default 64BIT
diff --git a/arch/riscv/include/asm/crash_core.h b/arch/riscv/include/asm/crash_core.h
new file mode 100644
index 0000000000000000000000000000000000000000..e1874b23feaf116d90b8ee9950ca270f00d5d038
--- /dev/null
+++ b/arch/riscv/include/asm/crash_core.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef _RISCV_CRASH_CORE_H
+#define _RISCV_CRASH_CORE_H
+
+#define CRASH_ALIGN PMD_SIZE
+
+#define CRASH_ADDR_LOW_MAX dma32_phys_limit
+#define CRASH_ADDR_HIGH_MAX memblock_end_of_DRAM()
+
+extern phys_addr_t memblock_end_of_DRAM(void);
+#endif
diff --git a/arch/riscv/include/asm/processor.h b/arch/riscv/include/asm/processor.h
index 3e23e1786d0521678c111c5a94ed33332403b556..441da1839c947803cdcbe177e4292e2b81a9db49 100644
--- a/arch/riscv/include/asm/processor.h
+++ b/arch/riscv/include/asm/processor.h
@@ -116,6 +116,8 @@ static inline void wait_for_interrupt(void)
__asm__ __volatile__ ("wfi");
}
+extern phys_addr_t dma32_phys_limit;
+
struct device_node;
int riscv_of_processor_hartid(struct device_node *node, unsigned long *hartid);
int riscv_early_of_processor_hartid(struct device_node *node, unsigned long *hartid);
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 0798bd861dcb9adfcec5e39b2c0713e8d3b3f1c0..d9a4e87028644f962f1c51ad3a89c8b475063e05 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -65,7 +65,7 @@ extern char _start[];
void *_dtb_early_va __initdata;
uintptr_t _dtb_early_pa __initdata;
-static phys_addr_t dma32_phys_limit __initdata;
+phys_addr_t dma32_phys_limit __initdata;
static void __init zone_sizes_init(void)
{
@@ -1333,28 +1333,6 @@ static inline void setup_vm_final(void)
}
#endif /* CONFIG_MMU */
-/* Reserve 128M low memory by default for swiotlb buffer */
-#define DEFAULT_CRASH_KERNEL_LOW_SIZE (128UL << 20)
-
-static int __init reserve_crashkernel_low(unsigned long long low_size)
-{
- unsigned long long low_base;
-
- low_base = memblock_phys_alloc_range(low_size, PMD_SIZE, 0, dma32_phys_limit);
- if (!low_base) {
- pr_err("cannot allocate crashkernel low memory (size:0x%llx).\n", low_size);
- return -ENOMEM;
- }
-
- pr_info("crashkernel low memory reserved: 0x%016llx - 0x%016llx (%lld MB)\n",
- low_base, low_base + low_size, low_size >> 20);
-
- crashk_low_res.start = low_base;
- crashk_low_res.end = low_base + low_size - 1;
-
- return 0;
-}
-
/*
* reserve_crashkernel() - reserves memory for crash kernel
*
@@ -1362,122 +1340,25 @@ static int __init reserve_crashkernel_low(unsigned long long low_size)
* line parameter. The memory reserved is used by dump capture kernel when
* primary kernel is crashing.
*/
-static void __init reserve_crashkernel(void)
+static void __init arch_reserve_crashkernel(void)
{
- unsigned long long crash_base = 0;
- unsigned long long crash_size = 0;
- unsigned long long crash_low_size = 0;
- unsigned long search_start = memblock_start_of_DRAM();
- unsigned long search_end = (unsigned long)dma32_phys_limit;
+ unsigned long long low_size = 0;
+ unsigned long long crash_base, crash_size;
char *cmdline = boot_command_line;
- bool fixed_base = false;
bool high = false;
-
- int ret = 0;
+ int ret;
if (!IS_ENABLED(CONFIG_KEXEC_CORE))
return;
- /*
- * Don't reserve a region for a crash kernel on a crash kernel
- * since it doesn't make much sense and we have limited memory
- * resources.
- */
- if (is_kdump_kernel()) {
- pr_info("crashkernel: ignoring reservation request\n");
- return;
- }
ret = parse_crashkernel(cmdline, memblock_phys_mem_size(),
- &crash_size, &crash_base);
- if (ret == -ENOENT) {
- /* Fallback to crashkernel=X,[high,low] */
- ret = parse_crashkernel_high(cmdline, 0, &crash_size, &crash_base);
- if (ret || !crash_size)
- return;
-
- /*
- * crashkernel=Y,low is valid only when crashkernel=X,high
- * is passed.
- */
- ret = parse_crashkernel_low(cmdline, 0, &crash_low_size, &crash_base);
- if (ret == -ENOENT)
- crash_low_size = DEFAULT_CRASH_KERNEL_LOW_SIZE;
- else if (ret)
- return;
-
- search_start = (unsigned long)dma32_phys_limit;
- search_end = memblock_end_of_DRAM();
- high = true;
- } else if (ret || !crash_size) {
- /* Invalid argument value specified */
+ &crash_size, &crash_base,
+ &low_size, &high);
+ if (ret)
return;
- }
-
- crash_size = PAGE_ALIGN(crash_size);
-
- if (crash_base) {
- fixed_base = true;
- search_start = crash_base;
- search_end = crash_base + crash_size;
- }
-
- /*
- * Current riscv boot protocol requires 2MB alignment for
- * RV64 and 4MB alignment for RV32 (hugepage size)
- *
- * Try to alloc from 32bit addressible physical memory so that
- * swiotlb can work on the crash kernel.
- */
- crash_base = memblock_phys_alloc_range(crash_size, PMD_SIZE,
- search_start, search_end);
- if (crash_base == 0) {
- /*
- * For crashkernel=size[KMG]@offset[KMG], print out failure
- * message if can't reserve the specified region.
- */
- if (fixed_base) {
- pr_warn("crashkernel: allocating failed with given size@offset\n");
- return;
- }
-
- if (high) {
- /*
- * For crashkernel=size[KMG],high, if the first attempt was
- * for high memory, fall back to low memory.
- */
- search_start = memblock_start_of_DRAM();
- search_end = (unsigned long)dma32_phys_limit;
- } else {
- /*
- * For crashkernel=size[KMG], if the first attempt was for
- * low memory, fall back to high memory, the minimum required
- * low memory will be reserved later.
- */
- search_start = (unsigned long)dma32_phys_limit;
- search_end = memblock_end_of_DRAM();
- crash_low_size = DEFAULT_CRASH_KERNEL_LOW_SIZE;
- }
-
- crash_base = memblock_phys_alloc_range(crash_size, PMD_SIZE,
- search_start, search_end);
- if (crash_base == 0) {
- pr_warn("crashkernel: couldn't allocate %lldKB\n",
- crash_size >> 10);
- return;
- }
- }
-
- if ((crash_base >= dma32_phys_limit) && crash_low_size &&
- reserve_crashkernel_low(crash_low_size)) {
- memblock_phys_free(crash_base, crash_size);
- return;
- }
-
- pr_info("crashkernel: reserved 0x%016llx - 0x%016llx (%lld MB)\n",
- crash_base, crash_base + crash_size, crash_size >> 20);
- crashk_res.start = crash_base;
- crashk_res.end = crash_base + crash_size - 1;
+ reserve_crashkernel_generic(cmdline, crash_size, crash_base,
+ low_size, high);
}
void __init paging_init(void)
@@ -1495,7 +1376,7 @@ void __init misc_mem_init(void)
arch_numa_init();
sparse_init();
zone_sizes_init();
- reserve_crashkernel();
+ arch_reserve_crashkernel();
memblock_dump_all();
}
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index de6ad0fb2328a1b551105151da26bdb6b59c5fb2..e555b576d3c80b290a2ca082907aaa566aeb4a01 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -625,8 +625,8 @@ static void __init reserve_crashkernel(void)
phys_addr_t low, high;
int rc;
- rc = parse_crashkernel(boot_command_line, ident_map_size, &crash_size,
- &crash_base);
+ rc = parse_crashkernel(boot_command_line, ident_map_size,
+ &crash_size, &crash_base, NULL, NULL);
crash_base = ALIGN(crash_base, KEXEC_CRASH_MEM_ALIGN);
crash_size = ALIGN(crash_size, KEXEC_CRASH_MEM_ALIGN);
diff --git a/arch/sh/kernel/machine_kexec.c b/arch/sh/kernel/machine_kexec.c
index 223c14f44af7e43f4ca4e48a7c34a685b86cdc89..fa3a7b36190a2acfb4e64d724afad8e33a88f3e2 100644
--- a/arch/sh/kernel/machine_kexec.c
+++ b/arch/sh/kernel/machine_kexec.c
@@ -154,7 +154,7 @@ void __init reserve_crashkernel(void)
int ret;
ret = parse_crashkernel(boot_command_line, memblock_phys_mem_size(),
- &crash_size, &crash_base);
+ &crash_size, &crash_base, NULL, NULL);
if (ret == 0 && crash_size > 0) {
crashk_res.start = crash_base;
crashk_res.end = crash_base + crash_size - 1;
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 433f5e1906d1a155d341d12718b9fa97c5964897..6a917f62eff2068e83900577df2cde1fadbb6e92 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2075,6 +2075,9 @@ config ARCH_SUPPORTS_CRASH_DUMP
config ARCH_SUPPORTS_CRASH_HOTPLUG
def_bool y
+config ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
+ def_bool CRASH_CORE
+
config PHYSICAL_START
hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
default "0x1000000"
diff --git a/arch/x86/include/asm/crash_core.h b/arch/x86/include/asm/crash_core.h
new file mode 100644
index 0000000000000000000000000000000000000000..76af98f4e80126b77fdc25740ca71b723aadc419
--- /dev/null
+++ b/arch/x86/include/asm/crash_core.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _X86_CRASH_CORE_H
+#define _X86_CRASH_CORE_H
+
+/* 16M alignment for crash kernel regions */
+#define CRASH_ALIGN SZ_16M
+
+/*
+ * Keep the crash kernel below this limit.
+ *
+ * Earlier 32-bits kernels would limit the kernel to the low 512 MB range
+ * due to mapping restrictions.
+ *
+ * 64-bit kdump kernels need to be restricted to be under 64 TB, which is
+ * the upper limit of system RAM in 4-level paging mode. Since the kdump
+ * jump could be from 5-level paging to 4-level paging, the jump will fail if
+ * the kernel is put above 64 TB, and during the 1st kernel bootup there's
+ * no good way to detect the paging mode of the target kernel which will be
+ * loaded for dumping.
+ */
+extern unsigned long swiotlb_size_or_default(void);
+
+#ifdef CONFIG_X86_32
+# define CRASH_ADDR_LOW_MAX SZ_512M
+# define CRASH_ADDR_HIGH_MAX SZ_512M
+#else
+# define CRASH_ADDR_LOW_MAX SZ_4G
+# define CRASH_ADDR_HIGH_MAX SZ_64T
+#endif
+
+# define DEFAULT_CRASH_KERNEL_LOW_SIZE crash_low_size_default()
+
+static inline unsigned long crash_low_size_default(void)
+{
+#ifdef CONFIG_X86_64
+ return max(swiotlb_size_or_default() + (8UL << 20), 256UL << 20);
+#else
+ return 0;
+#endif
+}
+
+#endif /* _X86_CRASH_CORE_H */
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index ccd3ad29a1dcfa1bb28fb54bbb6a6acdce726eb6..163c35db3d04393ac904dee4eec1b789b8ecac3a 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -466,154 +466,29 @@ static void __init memblock_x86_reserve_range_setup_data(void)
}
}
-/*
- * --------- Crashkernel reservation ------------------------------
- */
-
-/* 16M alignment for crash kernel regions */
-#define CRASH_ALIGN SZ_16M
-
-/*
- * Keep the crash kernel below this limit.
- *
- * Earlier 32-bits kernels would limit the kernel to the low 512 MB range
- * due to mapping restrictions.
- *
- * 64-bit kdump kernels need to be restricted to be under 64 TB, which is
- * the upper limit of system RAM in 4-level paging mode. Since the kdump
- * jump could be from 5-level paging to 4-level paging, the jump will fail if
- * the kernel is put above 64 TB, and during the 1st kernel bootup there's
- * no good way to detect the paging mode of the target kernel which will be
- * loaded for dumping.
- */
-#ifdef CONFIG_X86_32
-# define CRASH_ADDR_LOW_MAX SZ_512M
-# define CRASH_ADDR_HIGH_MAX SZ_512M
-#else
-# define CRASH_ADDR_LOW_MAX SZ_4G
-# define CRASH_ADDR_HIGH_MAX SZ_64T
-#endif
-
-static int __init reserve_crashkernel_low(void)
+static void __init arch_reserve_crashkernel(void)
{
-#ifdef CONFIG_X86_64
- unsigned long long base, low_base = 0, low_size = 0;
- unsigned long low_mem_limit;
- int ret;
-
- low_mem_limit = min(memblock_phys_mem_size(), CRASH_ADDR_LOW_MAX);
-
- /* crashkernel=Y,low */
- ret = parse_crashkernel_low(boot_command_line, low_mem_limit, &low_size, &base);
- if (ret) {
- /*
- * two parts from kernel/dma/swiotlb.c:
- * -swiotlb size: user-specified with swiotlb= or default.
- *
- * -swiotlb overflow buffer: now hardcoded to 32k. We round it
- * to 8M for other buffers that may need to stay low too. Also
- * make sure we allocate enough extra low memory so that we
- * don't run out of DMA buffers for 32-bit devices.
- */
- low_size = max(swiotlb_size_or_default() + (8UL << 20), 256UL << 20);
- } else {
- /* passed with crashkernel=0,low ? */
- if (!low_size)
- return 0;
- }
-
- low_base = memblock_phys_alloc_range(low_size, CRASH_ALIGN, 0, CRASH_ADDR_LOW_MAX);
- if (!low_base) {
- pr_err("Cannot reserve %ldMB crashkernel low memory, please try smaller size.\n",
- (unsigned long)(low_size >> 20));
- return -ENOMEM;
- }
-
- pr_info("Reserving %ldMB of low memory at %ldMB for crashkernel (low RAM limit: %ldMB)\n",
- (unsigned long)(low_size >> 20),
- (unsigned long)(low_base >> 20),
- (unsigned long)(low_mem_limit >> 20));
-
- crashk_low_res.start = low_base;
- crashk_low_res.end = low_base + low_size - 1;
- insert_resource(&iomem_resource, &crashk_low_res);
-#endif
- return 0;
-}
-
-static void __init reserve_crashkernel(void)
-{
- unsigned long long crash_size, crash_base, total_mem;
+ unsigned long long crash_base, crash_size, low_size = 0;
+ char *cmdline = boot_command_line;
bool high = false;
int ret;
if (!IS_ENABLED(CONFIG_KEXEC_CORE))
return;
- total_mem = memblock_phys_mem_size();
-
- /* crashkernel=XM */
- ret = parse_crashkernel(boot_command_line, total_mem, &crash_size, &crash_base);
- if (ret != 0 || crash_size <= 0) {
- /* crashkernel=X,high */
- ret = parse_crashkernel_high(boot_command_line, total_mem,
- &crash_size, &crash_base);
- if (ret != 0 || crash_size <= 0)
- return;
- high = true;
- }
+ ret = parse_crashkernel(cmdline, memblock_phys_mem_size(),
+ &crash_size, &crash_base,
+ &low_size, &high);
+ if (ret)
+ return;
if (xen_pv_domain()) {
pr_info("Ignoring crashkernel for a Xen PV domain\n");
return;
}
- /* 0 means: find the address automatically */
- if (!crash_base) {
- /*
- * Set CRASH_ADDR_LOW_MAX upper bound for crash memory,
- * crashkernel=x,high reserves memory over 4G, also allocates
- * 256M extra low memory for DMA buffers and swiotlb.
- * But the extra memory is not required for all machines.
- * So try low memory first and fall back to high memory
- * unless "crashkernel=size[KMG],high" is specified.
- */
- if (!high)
- crash_base = memblock_phys_alloc_range(crash_size,
- CRASH_ALIGN, CRASH_ALIGN,
- CRASH_ADDR_LOW_MAX);
- if (!crash_base)
- crash_base = memblock_phys_alloc_range(crash_size,
- CRASH_ALIGN, CRASH_ALIGN,
- CRASH_ADDR_HIGH_MAX);
- if (!crash_base) {
- pr_info("crashkernel reservation failed - No suitable area found.\n");
- return;
- }
- } else {
- unsigned long long start;
-
- start = memblock_phys_alloc_range(crash_size, SZ_1M, crash_base,
- crash_base + crash_size);
- if (start != crash_base) {
- pr_info("crashkernel reservation failed - memory is in use.\n");
- return;
- }
- }
-
- if (crash_base >= (1ULL << 32) && reserve_crashkernel_low()) {
- memblock_phys_free(crash_base, crash_size);
- return;
- }
-
- pr_info("Reserving %ldMB of memory at %ldMB for crashkernel (System RAM: %ldMB)\n",
- (unsigned long)(crash_size >> 20),
- (unsigned long)(crash_base >> 20),
- (unsigned long)(total_mem >> 20));
-
- crashk_res.start = crash_base;
- crashk_res.end = crash_base + crash_size - 1;
- insert_resource(&iomem_resource, &crashk_res);
+ reserve_crashkernel_generic(cmdline, crash_size, crash_base,
+ low_size, high);
}
static struct resource standard_io_resources[] = {
@@ -1229,7 +1104,7 @@ void __init setup_arch(char **cmdline_p)
* Reserve memory for crash kernel after SRAT is parsed so that it
* won't consume hotpluggable memory.
*/
- reserve_crashkernel();
+ arch_reserve_crashkernel();
memblock_find_dma_reserve();
diff --git a/block/bdev.c b/block/bdev.c
index 2018d250e1310913952b272481e299f188ea34f3..e4cfb7adb64581d0630d61dc0f5a287245da7d38 100644
--- a/block/bdev.c
+++ b/block/bdev.c
@@ -292,7 +292,7 @@ EXPORT_SYMBOL(thaw_bdev);
*/
static __cacheline_aligned_in_smp DEFINE_MUTEX(bdev_lock);
-static struct kmem_cache * bdev_cachep __read_mostly;
+static struct kmem_cache *bdev_cachep __ro_after_init;
static struct inode *bdev_alloc_inode(struct super_block *sb)
{
@@ -361,13 +361,13 @@ static struct file_system_type bd_type = {
.kill_sb = kill_anon_super,
};
-struct super_block *blockdev_superblock __read_mostly;
+struct super_block *blockdev_superblock __ro_after_init;
EXPORT_SYMBOL_GPL(blockdev_superblock);
void __init bdev_cache_init(void)
{
int err;
- static struct vfsmount *bd_mnt;
+ static struct vfsmount *bd_mnt __ro_after_init;
bdev_cachep = kmem_cache_create("bdev_cache", sizeof(struct bdev_inode),
0, (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
diff --git a/drivers/accel/ivpu/ivpu_job.c b/drivers/accel/ivpu/ivpu_job.c
index 689dc0d13b8fadece4cbc0e56cbc21c4e2cc3509..8983e3a4fdf91a73893adfd0d1d526852dbe02f2 100644
--- a/drivers/accel/ivpu/ivpu_job.c
+++ b/drivers/accel/ivpu/ivpu_job.c
@@ -618,6 +618,5 @@ int ivpu_job_done_thread_init(struct ivpu_device *vdev)
void ivpu_job_done_thread_fini(struct ivpu_device *vdev)
{
- kthread_stop(vdev->job_done_thread);
- put_task_struct(vdev->job_done_thread);
+ kthread_stop_put(vdev->job_done_thread);
}
diff --git a/drivers/dma-buf/st-dma-fence-chain.c b/drivers/dma-buf/st-dma-fence-chain.c
index c0979c8049b5a3b071b90acceab1e70f51796ed4..9c2a0c082a768f89ddba627e6a5d61edac512f1b 100644
--- a/drivers/dma-buf/st-dma-fence-chain.c
+++ b/drivers/dma-buf/st-dma-fence-chain.c
@@ -476,10 +476,9 @@ static int find_race(void *arg)
for (i = 0; i < ncpus; i++) {
int ret;
- ret = kthread_stop(threads[i]);
+ ret = kthread_stop_put(threads[i]);
if (ret && !err)
err = ret;
- put_task_struct(threads[i]);
}
kfree(threads);
@@ -591,8 +590,7 @@ static int wait_forward(void *arg)
for (i = 0; i < fc.chain_length; i++)
dma_fence_signal(fc.fences[i]);
- err = kthread_stop(tsk);
- put_task_struct(tsk);
+ err = kthread_stop_put(tsk);
err:
fence_chains_fini(&fc);
@@ -621,8 +619,7 @@ static int wait_backward(void *arg)
for (i = fc.chain_length; i--; )
dma_fence_signal(fc.fences[i]);
- err = kthread_stop(tsk);
- put_task_struct(tsk);
+ err = kthread_stop_put(tsk);
err:
fence_chains_fini(&fc);
@@ -669,8 +666,7 @@ static int wait_random(void *arg)
for (i = 0; i < fc.chain_length; i++)
dma_fence_signal(fc.fences[i]);
- err = kthread_stop(tsk);
- put_task_struct(tsk);
+ err = kthread_stop_put(tsk);
err:
fence_chains_fini(&fc);
diff --git a/drivers/dma-buf/st-dma-fence.c b/drivers/dma-buf/st-dma-fence.c
index fb6e0a6ae2c96e34a5627884952637d024d9ceba..b7c6f7ea9e0c83910b5a7d5001c25e0b96fa7492 100644
--- a/drivers/dma-buf/st-dma-fence.c
+++ b/drivers/dma-buf/st-dma-fence.c
@@ -548,11 +548,9 @@ static int race_signal_callback(void *arg)
for (i = 0; i < ARRAY_SIZE(t); i++) {
int err;
- err = kthread_stop(t[i].task);
+ err = kthread_stop_put(t[i].task);
if (err && !ret)
ret = err;
-
- put_task_struct(t[i].task);
}
}
diff --git a/drivers/gpu/drm/i915/gt/selftest_migrate.c b/drivers/gpu/drm/i915/gt/selftest_migrate.c
index 1a34cbe04fb64692832a3fe0474f1dc19ff311de..3eff364ccf3ac7a1a0ea9afd54c744298b8c5b89 100644
--- a/drivers/gpu/drm/i915/gt/selftest_migrate.c
+++ b/drivers/gpu/drm/i915/gt/selftest_migrate.c
@@ -719,11 +719,9 @@ static int threaded_migrate(struct intel_migrate *migrate,
if (IS_ERR_OR_NULL(tsk))
continue;
- status = kthread_stop(tsk);
+ status = kthread_stop_put(tsk);
if (status && !err)
err = status;
-
- put_task_struct(tsk);
}
kfree(thread);
diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c
index db304f178136cdcf8e63ec35cd124388da045255..7cff90aa8d24c280cdd36afad282fb08877f8d86 100644
--- a/drivers/net/xen-netback/interface.c
+++ b/drivers/net/xen-netback/interface.c
@@ -671,8 +671,7 @@ int xenvif_connect_ctrl(struct xenvif *vif, grant_ref_t ring_ref,
static void xenvif_disconnect_queue(struct xenvif_queue *queue)
{
if (queue->task) {
- kthread_stop(queue->task);
- put_task_struct(queue->task);
+ kthread_stop_put(queue->task);
queue->task = NULL;
}
diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
index ccc5acb39f5a6af954bd452913e4a4dcdb49df12..d8437a98037b96874c0d7a5544ba457a5384e83f 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
@@ -3959,22 +3959,7 @@ static ssize_t debugfs_bist_linkrate_v3_hw_write(struct file *filp,
return count;
}
-
-static int debugfs_bist_linkrate_v3_hw_open(struct inode *inode,
- struct file *filp)
-{
- return single_open(filp, debugfs_bist_linkrate_v3_hw_show,
- inode->i_private);
-}
-
-static const struct file_operations debugfs_bist_linkrate_v3_hw_fops = {
- .open = debugfs_bist_linkrate_v3_hw_open,
- .read = seq_read,
- .write = debugfs_bist_linkrate_v3_hw_write,
- .llseek = seq_lseek,
- .release = single_release,
- .owner = THIS_MODULE,
-};
+DEFINE_SHOW_STORE_ATTRIBUTE(debugfs_bist_linkrate_v3_hw);
static const struct {
int value;
@@ -4049,22 +4034,7 @@ static ssize_t debugfs_bist_code_mode_v3_hw_write(struct file *filp,
return count;
}
-
-static int debugfs_bist_code_mode_v3_hw_open(struct inode *inode,
- struct file *filp)
-{
- return single_open(filp, debugfs_bist_code_mode_v3_hw_show,
- inode->i_private);
-}
-
-static const struct file_operations debugfs_bist_code_mode_v3_hw_fops = {
- .open = debugfs_bist_code_mode_v3_hw_open,
- .read = seq_read,
- .write = debugfs_bist_code_mode_v3_hw_write,
- .llseek = seq_lseek,
- .release = single_release,
- .owner = THIS_MODULE,
-};
+DEFINE_SHOW_STORE_ATTRIBUTE(debugfs_bist_code_mode_v3_hw);
static ssize_t debugfs_bist_phy_v3_hw_write(struct file *filp,
const char __user *buf,
@@ -4098,22 +4068,7 @@ static int debugfs_bist_phy_v3_hw_show(struct seq_file *s, void *p)
return 0;
}
-
-static int debugfs_bist_phy_v3_hw_open(struct inode *inode,
- struct file *filp)
-{
- return single_open(filp, debugfs_bist_phy_v3_hw_show,
- inode->i_private);
-}
-
-static const struct file_operations debugfs_bist_phy_v3_hw_fops = {
- .open = debugfs_bist_phy_v3_hw_open,
- .read = seq_read,
- .write = debugfs_bist_phy_v3_hw_write,
- .llseek = seq_lseek,
- .release = single_release,
- .owner = THIS_MODULE,
-};
+DEFINE_SHOW_STORE_ATTRIBUTE(debugfs_bist_phy_v3_hw);
static ssize_t debugfs_bist_cnt_v3_hw_write(struct file *filp,
const char __user *buf,
@@ -4146,22 +4101,7 @@ static int debugfs_bist_cnt_v3_hw_show(struct seq_file *s, void *p)
return 0;
}
-
-static int debugfs_bist_cnt_v3_hw_open(struct inode *inode,
- struct file *filp)
-{
- return single_open(filp, debugfs_bist_cnt_v3_hw_show,
- inode->i_private);
-}
-
-static const struct file_operations debugfs_bist_cnt_v3_hw_ops = {
- .open = debugfs_bist_cnt_v3_hw_open,
- .read = seq_read,
- .write = debugfs_bist_cnt_v3_hw_write,
- .llseek = seq_lseek,
- .release = single_release,
- .owner = THIS_MODULE,
-};
+DEFINE_SHOW_STORE_ATTRIBUTE(debugfs_bist_cnt_v3_hw);
static const struct {
int value;
@@ -4225,22 +4165,7 @@ static ssize_t debugfs_bist_mode_v3_hw_write(struct file *filp,
return count;
}
-
-static int debugfs_bist_mode_v3_hw_open(struct inode *inode,
- struct file *filp)
-{
- return single_open(filp, debugfs_bist_mode_v3_hw_show,
- inode->i_private);
-}
-
-static const struct file_operations debugfs_bist_mode_v3_hw_fops = {
- .open = debugfs_bist_mode_v3_hw_open,
- .read = seq_read,
- .write = debugfs_bist_mode_v3_hw_write,
- .llseek = seq_lseek,
- .release = single_release,
- .owner = THIS_MODULE,
-};
+DEFINE_SHOW_STORE_ATTRIBUTE(debugfs_bist_mode_v3_hw);
static ssize_t debugfs_bist_enable_v3_hw_write(struct file *filp,
const char __user *buf,
@@ -4278,22 +4203,7 @@ static int debugfs_bist_enable_v3_hw_show(struct seq_file *s, void *p)
return 0;
}
-
-static int debugfs_bist_enable_v3_hw_open(struct inode *inode,
- struct file *filp)
-{
- return single_open(filp, debugfs_bist_enable_v3_hw_show,
- inode->i_private);
-}
-
-static const struct file_operations debugfs_bist_enable_v3_hw_fops = {
- .open = debugfs_bist_enable_v3_hw_open,
- .read = seq_read,
- .write = debugfs_bist_enable_v3_hw_write,
- .llseek = seq_lseek,
- .release = single_release,
- .owner = THIS_MODULE,
-};
+DEFINE_SHOW_STORE_ATTRIBUTE(debugfs_bist_enable_v3_hw);
static const struct {
char *name;
@@ -4331,21 +4241,7 @@ static int debugfs_v3_hw_show(struct seq_file *s, void *p)
return 0;
}
-
-static int debugfs_v3_hw_open(struct inode *inode, struct file *filp)
-{
- return single_open(filp, debugfs_v3_hw_show,
- inode->i_private);
-}
-
-static const struct file_operations debugfs_v3_hw_fops = {
- .open = debugfs_v3_hw_open,
- .read = seq_read,
- .write = debugfs_v3_hw_write,
- .llseek = seq_lseek,
- .release = single_release,
- .owner = THIS_MODULE,
-};
+DEFINE_SHOW_STORE_ATTRIBUTE(debugfs_v3_hw);
static ssize_t debugfs_phy_down_cnt_v3_hw_write(struct file *filp,
const char __user *buf,
@@ -4376,22 +4272,7 @@ static int debugfs_phy_down_cnt_v3_hw_show(struct seq_file *s, void *p)
return 0;
}
-
-static int debugfs_phy_down_cnt_v3_hw_open(struct inode *inode,
- struct file *filp)
-{
- return single_open(filp, debugfs_phy_down_cnt_v3_hw_show,
- inode->i_private);
-}
-
-static const struct file_operations debugfs_phy_down_cnt_v3_hw_fops = {
- .open = debugfs_phy_down_cnt_v3_hw_open,
- .read = seq_read,
- .write = debugfs_phy_down_cnt_v3_hw_write,
- .llseek = seq_lseek,
- .release = single_release,
- .owner = THIS_MODULE,
-};
+DEFINE_SHOW_STORE_ATTRIBUTE(debugfs_phy_down_cnt_v3_hw);
enum fifo_dump_mode_v3_hw {
FIFO_DUMP_FORVER = (1U << 0),
@@ -4830,7 +4711,7 @@ static void debugfs_bist_init_v3_hw(struct hisi_hba *hisi_hba)
hisi_hba, &debugfs_bist_phy_v3_hw_fops);
debugfs_create_file("cnt", 0600, hisi_hba->debugfs_bist_dentry,
- hisi_hba, &debugfs_bist_cnt_v3_hw_ops);
+ hisi_hba, &debugfs_bist_cnt_v3_hw_fops);
debugfs_create_file("loopback_mode", 0600,
hisi_hba->debugfs_bist_dentry,
diff --git a/drivers/scsi/qla2xxx/qla_dfs.c b/drivers/scsi/qla2xxx/qla_dfs.c
index a7a364760b8002bd9b4bb02270d5e83fe4c5b3f0..55ff3d7482b3eae95a33326c3e59002bbb2d93b0 100644
--- a/drivers/scsi/qla2xxx/qla_dfs.c
+++ b/drivers/scsi/qla2xxx/qla_dfs.c
@@ -528,51 +528,22 @@ qla_dfs_naqp_show(struct seq_file *s, void *unused)
*
* Example for creating "TEST" sysfs file:
* 1. struct qla_hw_data { ... struct dentry *dfs_TEST; }
- * 2. QLA_DFS_SETUP_RD(TEST, scsi_qla_host_t);
+ * 2. QLA_DFS_SETUP_RD(TEST);
* 3. In qla2x00_dfs_setup():
* QLA_DFS_CREATE_FILE(ha, TEST, 0600, ha->dfs_dir, vha);
* 4. In qla2x00_dfs_remove():
* QLA_DFS_REMOVE_FILE(ha, TEST);
*/
-#define QLA_DFS_SETUP_RD(_name, _ctx_struct) \
-static int \
-qla_dfs_##_name##_open(struct inode *inode, struct file *file) \
-{ \
- _ctx_struct *__ctx = inode->i_private; \
- \
- return single_open(file, qla_dfs_##_name##_show, __ctx); \
-} \
- \
-static const struct file_operations qla_dfs_##_name##_ops = { \
- .open = qla_dfs_##_name##_open, \
- .read = seq_read, \
- .llseek = seq_lseek, \
- .release = single_release, \
-};
+#define QLA_DFS_SETUP_RD(_name) DEFINE_SHOW_ATTRIBUTE(qla_dfs_##_name)
-#define QLA_DFS_SETUP_RW(_name, _ctx_struct) \
-static int \
-qla_dfs_##_name##_open(struct inode *inode, struct file *file) \
-{ \
- _ctx_struct *__ctx = inode->i_private; \
- \
- return single_open(file, qla_dfs_##_name##_show, __ctx); \
-} \
- \
-static const struct file_operations qla_dfs_##_name##_ops = { \
- .open = qla_dfs_##_name##_open, \
- .read = seq_read, \
- .llseek = seq_lseek, \
- .release = single_release, \
- .write = qla_dfs_##_name##_write, \
-};
+#define QLA_DFS_SETUP_RW(_name) DEFINE_SHOW_STORE_ATTRIBUTE(qla_dfs_##_name)
#define QLA_DFS_ROOT_CREATE_FILE(_name, _perm, _ctx) \
do { \
if (!qla_dfs_##_name) \
qla_dfs_##_name = debugfs_create_file(#_name, \
_perm, qla2x00_dfs_root, _ctx, \
- &qla_dfs_##_name##_ops); \
+ &qla_dfs_##_name##_fops); \
} while (0)
#define QLA_DFS_ROOT_REMOVE_FILE(_name) \
@@ -587,7 +558,7 @@ static const struct file_operations qla_dfs_##_name##_ops = { \
do { \
(_struct)->dfs_##_name = debugfs_create_file(#_name, \
_perm, _parent, _ctx, \
- &qla_dfs_##_name##_ops) \
+ &qla_dfs_##_name##_fops) \
} while (0)
#define QLA_DFS_REMOVE_FILE(_struct, _name) \
@@ -598,14 +569,6 @@ static const struct file_operations qla_dfs_##_name##_ops = { \
} \
} while (0)
-static int
-qla_dfs_naqp_open(struct inode *inode, struct file *file)
-{
- struct scsi_qla_host *vha = inode->i_private;
-
- return single_open(file, qla_dfs_naqp_show, vha);
-}
-
static ssize_t
qla_dfs_naqp_write(struct file *file, const char __user *buffer,
size_t count, loff_t *pos)
@@ -653,15 +616,7 @@ qla_dfs_naqp_write(struct file *file, const char __user *buffer,
kfree(buf);
return rc;
}
-
-static const struct file_operations dfs_naqp_ops = {
- .open = qla_dfs_naqp_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- .write = qla_dfs_naqp_write,
-};
-
+QLA_DFS_SETUP_RW(naqp);
int
qla2x00_dfs_setup(scsi_qla_host_t *vha)
@@ -707,7 +662,7 @@ qla2x00_dfs_setup(scsi_qla_host_t *vha)
if (IS_QLA27XX(ha) || IS_QLA83XX(ha) || IS_QLA28XX(ha)) {
ha->tgt.dfs_naqp = debugfs_create_file("naqp",
- 0400, ha->dfs_dir, vha, &dfs_naqp_ops);
+ 0400, ha->dfs_dir, vha, &qla_dfs_naqp_fops);
if (IS_ERR(ha->tgt.dfs_naqp)) {
ql_log(ql_log_warn, vha, 0xd011,
"Unable to create debugFS naqp node.\n");
diff --git a/drivers/usb/usbip/usbip_common.h b/drivers/usb/usbip/usbip_common.h
index d8cbd2dfc2c256da2a9cf7780907b58a98112b6b..282efca64a01208cf5b189e177ffec53ba9aea00 100644
--- a/drivers/usb/usbip/usbip_common.h
+++ b/drivers/usb/usbip/usbip_common.h
@@ -298,12 +298,6 @@ struct usbip_device {
__k; \
})
-#define kthread_stop_put(k) \
- do { \
- kthread_stop(k); \
- put_task_struct(k); \
- } while (0)
-
/* usbip_common.c */
void usbip_dump_urb(struct urb *purb);
void usbip_dump_header(struct usbip_header *pdu);
diff --git a/fs/anon_inodes.c b/fs/anon_inodes.c
index 24192a7667edf766e6932e12459c93379875e7e5..d26222b7eefe247f778d6b574873a9058d225146 100644
--- a/fs/anon_inodes.c
+++ b/fs/anon_inodes.c
@@ -24,8 +24,8 @@
#include <linux/uaccess.h>
-static struct vfsmount *anon_inode_mnt __read_mostly;
-static struct inode *anon_inode_inode;
+static struct vfsmount *anon_inode_mnt __ro_after_init;
+static struct inode *anon_inode_inode __ro_after_init;
/*
* anon_inodefs_dname() is called from d_path().
diff --git a/fs/buffer.c b/fs/buffer.c
index 657a62bab73d753016d235b08f8b6b5e8397ff11..967f34b70aa8f73aa56beec71a93a08b20546698 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2983,13 +2983,13 @@ EXPORT_SYMBOL(try_to_free_buffers);
/*
* Buffer-head allocation
*/
-static struct kmem_cache *bh_cachep __read_mostly;
+static struct kmem_cache *bh_cachep __ro_after_init;
/*
* Once the number of bh's in the machine exceeds this level, we start
* stripping them in writeback.
*/
-static unsigned long max_buffer_heads;
+static unsigned long max_buffer_heads __ro_after_init;
int buffer_heads_over_limit;
diff --git a/fs/char_dev.c b/fs/char_dev.c
index 6ba032442b39d37e0d3901b6f7219237e8758c40..57cc096c498a29fc3bc2278a142a494ffbe5f3fd 100644
--- a/fs/char_dev.c
+++ b/fs/char_dev.c
@@ -25,7 +25,7 @@
#include "internal.h"
-static struct kobj_map *cdev_map;
+static struct kobj_map *cdev_map __ro_after_init;
static DEFINE_MUTEX(chrdevs_lock);
diff --git a/fs/dcache.c b/fs/dcache.c
index 796e23761ba0505748faf160011f49736ac26522..c82ae731df9af780e58db42b45ba198375be2819 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -78,7 +78,7 @@ __cacheline_aligned_in_smp DEFINE_SEQLOCK(rename_lock);
EXPORT_SYMBOL(rename_lock);
-static struct kmem_cache *dentry_cache __read_mostly;
+static struct kmem_cache *dentry_cache __ro_after_init;
const struct qstr empty_name = QSTR_INIT("", 0);
EXPORT_SYMBOL(empty_name);
@@ -96,9 +96,9 @@ EXPORT_SYMBOL(dotdot_name);
* information, yet avoid using a prime hash-size or similar.
*/
-static unsigned int d_hash_shift __read_mostly;
+static unsigned int d_hash_shift __ro_after_init;
-static struct hlist_bl_head *dentry_hashtable __read_mostly;
+static struct hlist_bl_head *dentry_hashtable __ro_after_init;
static inline struct hlist_bl_head *d_hash(unsigned int hash)
{
@@ -3332,7 +3332,7 @@ static void __init dcache_init(void)
}
/* SLAB cache for __getname() consumers */
-struct kmem_cache *names_cachep __read_mostly;
+struct kmem_cache *names_cachep __ro_after_init;
EXPORT_SYMBOL(names_cachep);
void __init vfs_caches_init_early(void)
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 7bc494ee56b9d7e61e6a658e6de5eb62bacabbdc..20533266ade6e5b097b023182d8b59f5d6e82e19 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -151,7 +151,7 @@ struct dio {
};
} ____cacheline_aligned_in_smp;
-static struct kmem_cache *dio_cache __read_mostly;
+static struct kmem_cache *dio_cache __ro_after_init;
/*
* How many pages are in the queue?
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 1d9a71a0c4c1678dbd2b20e82c58a9ea55e78a4d..2877cc01cff180f1910913eefb4b9fa6c041de1f 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -256,10 +256,10 @@ static u64 loop_check_gen = 0;
static struct eventpoll *inserting_into;
/* Slab cache used to allocate "struct epitem" */
-static struct kmem_cache *epi_cache __read_mostly;
+static struct kmem_cache *epi_cache __ro_after_init;
/* Slab cache used to allocate "struct eppoll_entry" */
-static struct kmem_cache *pwq_cache __read_mostly;
+static struct kmem_cache *pwq_cache __ro_after_init;
/*
* List of files with newly added links, where we may need to limit the number
@@ -271,7 +271,7 @@ struct epitems_head {
};
static struct epitems_head *tfile_check_list = EP_UNACTIVE_PTR;
-static struct kmem_cache *ephead_cache __read_mostly;
+static struct kmem_cache *ephead_cache __ro_after_init;
static inline void free_ephead(struct epitems_head *head)
{
diff --git a/fs/fcntl.c b/fs/fcntl.c
index e871009f6c8895cdcb2787040e268247439b0e92..c80a6acad742fb027a4a990f63ef05d0678736d7 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -844,7 +844,7 @@ int send_sigurg(struct fown_struct *fown)
}
static DEFINE_SPINLOCK(fasync_lock);
-static struct kmem_cache *fasync_cache __read_mostly;
+static struct kmem_cache *fasync_cache __ro_after_init;
static void fasync_free_rcu(struct rcu_head *head)
{
diff --git a/fs/file_table.c b/fs/file_table.c
index fa92743ba6a91691f3621e0d8d050460c24649ef..de4a2915bfd4941281915be92ce7dbdd8f67ac3b 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -40,7 +40,7 @@ static struct files_stat_struct files_stat = {
};
/* SLAB cache for file structures */
-static struct kmem_cache *filp_cachep __read_mostly;
+static struct kmem_cache *filp_cachep __ro_after_init;
static struct percpu_counter nr_files __cacheline_aligned_in_smp;
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 33ca04733e933e25d6fb1ce88d4f137eef191a9d..ecf789b7168c9d7d644346c49be480d98afa1f37 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -1126,8 +1126,7 @@ static int init_threads(struct gfs2_sbd *sdp)
return 0;
fail:
- kthread_stop(sdp->sd_logd_process);
- put_task_struct(sdp->sd_logd_process);
+ kthread_stop_put(sdp->sd_logd_process);
sdp->sd_logd_process = NULL;
return error;
}
@@ -1135,13 +1134,11 @@ static int init_threads(struct gfs2_sbd *sdp)
void gfs2_destroy_threads(struct gfs2_sbd *sdp)
{
if (sdp->sd_logd_process) {
- kthread_stop(sdp->sd_logd_process);
- put_task_struct(sdp->sd_logd_process);
+ kthread_stop_put(sdp->sd_logd_process);
sdp->sd_logd_process = NULL;
}
if (sdp->sd_quotad_process) {
- kthread_stop(sdp->sd_quotad_process);
- put_task_struct(sdp->sd_quotad_process);
+ kthread_stop_put(sdp->sd_quotad_process);
sdp->sd_quotad_process = NULL;
}
}
diff --git a/fs/inode.c b/fs/inode.c
index 4f8984b97df082fff002e27d795b78dacce882e2..edcd8a61975f34c7a4cf467589848870430b3b8a 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -54,9 +54,9 @@
* inode_hash_lock
*/
-static unsigned int i_hash_mask __read_mostly;
-static unsigned int i_hash_shift __read_mostly;
-static struct hlist_head *inode_hashtable __read_mostly;
+static unsigned int i_hash_mask __ro_after_init;
+static unsigned int i_hash_shift __ro_after_init;
+static struct hlist_head *inode_hashtable __ro_after_init;
static __cacheline_aligned_in_smp DEFINE_SPINLOCK(inode_hash_lock);
/*
@@ -70,7 +70,7 @@ EXPORT_SYMBOL(empty_aops);
static DEFINE_PER_CPU(unsigned long, nr_inodes);
static DEFINE_PER_CPU(unsigned long, nr_unused);
-static struct kmem_cache *inode_cachep __read_mostly;
+static struct kmem_cache *inode_cachep __ro_after_init;
static long get_nr_inodes(void)
{
diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c
index 79b96e74a8a09d3ce3e73e326ca897d309ae00d4..4628edde2e7e1ad7a4e59b7f1117331a83d29b38 100644
--- a/fs/kernfs/mount.c
+++ b/fs/kernfs/mount.c
@@ -21,8 +21,9 @@
#include "kernfs-internal.h"
-struct kmem_cache *kernfs_node_cache, *kernfs_iattrs_cache;
-struct kernfs_global_locks *kernfs_locks;
+struct kmem_cache *kernfs_node_cache __ro_after_init;
+struct kmem_cache *kernfs_iattrs_cache __ro_after_init;
+struct kernfs_global_locks *kernfs_locks __ro_after_init;
static int kernfs_sop_show_options(struct seq_file *sf, struct dentry *dentry)
{
diff --git a/fs/locks.c b/fs/locks.c
index d4e49a990a8daaffebfd1f3dd22b5e2973812684..46d88b9e222cf2c50897e120248f7231821f579f 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -167,8 +167,8 @@ static DEFINE_HASHTABLE(blocked_hash, BLOCKED_HASH_BITS);
*/
static DEFINE_SPINLOCK(blocked_lock_lock);
-static struct kmem_cache *flctx_cache __read_mostly;
-static struct kmem_cache *filelock_cache __read_mostly;
+static struct kmem_cache *flctx_cache __ro_after_init;
+static struct kmem_cache *filelock_cache __ro_after_init;
static struct file_lock_context *
locks_get_lock_context(struct inode *inode, int type)
diff --git a/fs/namespace.c b/fs/namespace.c
index 6bde71735efa79e03fdb07fe5938efe21d70eb79..fbf0e596fcd30c9bae8d8cc1fbe09cf309f02334 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -39,10 +39,10 @@
/* Maximum number of mounts in a mount namespace */
static unsigned int sysctl_mount_max __read_mostly = 100000;
-static unsigned int m_hash_mask __read_mostly;
-static unsigned int m_hash_shift __read_mostly;
-static unsigned int mp_hash_mask __read_mostly;
-static unsigned int mp_hash_shift __read_mostly;
+static unsigned int m_hash_mask __ro_after_init;
+static unsigned int m_hash_shift __ro_after_init;
+static unsigned int mp_hash_mask __ro_after_init;
+static unsigned int mp_hash_shift __ro_after_init;
static __initdata unsigned long mhash_entries;
static int __init set_mhash_entries(char *str)
@@ -68,9 +68,9 @@ static u64 event;
static DEFINE_IDA(mnt_id_ida);
static DEFINE_IDA(mnt_group_ida);
-static struct hlist_head *mount_hashtable __read_mostly;
-static struct hlist_head *mountpoint_hashtable __read_mostly;
-static struct kmem_cache *mnt_cache __read_mostly;
+static struct hlist_head *mount_hashtable __ro_after_init;
+static struct hlist_head *mountpoint_hashtable __ro_after_init;
+static struct kmem_cache *mnt_cache __ro_after_init;
static DECLARE_RWSEM(namespace_sem);
static HLIST_HEAD(unmounted); /* protected by namespace_sem */
static LIST_HEAD(ex_mountpoints); /* protected by namespace_sem */
@@ -86,7 +86,7 @@ struct mount_kattr {
};
/* /sys/fs */
-struct kobject *fs_kobj;
+struct kobject *fs_kobj __ro_after_init;
EXPORT_SYMBOL_GPL(fs_kobj);
/*
diff --git a/fs/notify/dnotify/dnotify.c b/fs/notify/dnotify/dnotify.c
index 869b016014d2c2bc3882feac344b0828ce26a50b..1cb9ad7e884e1516320b7dd7f01ba686757db159 100644
--- a/fs/notify/dnotify/dnotify.c
+++ b/fs/notify/dnotify/dnotify.c
@@ -39,9 +39,9 @@ static void __init dnotify_sysctl_init(void)
#define dnotify_sysctl_init() do { } while (0)
#endif
-static struct kmem_cache *dnotify_struct_cache __read_mostly;
-static struct kmem_cache *dnotify_mark_cache __read_mostly;
-static struct fsnotify_group *dnotify_group __read_mostly;
+static struct kmem_cache *dnotify_struct_cache __ro_after_init;
+static struct kmem_cache *dnotify_mark_cache __ro_after_init;
+static struct fsnotify_group *dnotify_group __ro_after_init;
/*
* dnotify will attach one of these to each inode (i_fsnotify_marks) which
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index 62fe0b679e586ccbe181000fe94ed5e2b142b203..45aecdc302f4d9a41fee3cc364a553f2aeb59a3f 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -112,10 +112,10 @@ static void __init fanotify_sysctls_init(void)
extern const struct fsnotify_ops fanotify_fsnotify_ops;
-struct kmem_cache *fanotify_mark_cache __read_mostly;
-struct kmem_cache *fanotify_fid_event_cachep __read_mostly;
-struct kmem_cache *fanotify_path_event_cachep __read_mostly;
-struct kmem_cache *fanotify_perm_event_cachep __read_mostly;
+struct kmem_cache *fanotify_mark_cache __ro_after_init;
+struct kmem_cache *fanotify_fid_event_cachep __ro_after_init;
+struct kmem_cache *fanotify_path_event_cachep __ro_after_init;
+struct kmem_cache *fanotify_perm_event_cachep __ro_after_init;
#define FANOTIFY_EVENT_ALIGN 4
#define FANOTIFY_FID_INFO_HDR_LEN \
diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index 1c4bfdab008d9b4232cdbf5604bf42f87f5288eb..a3809ae9217027845dfd5a607e16947ac01a70b3 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -49,7 +49,7 @@
/* configurable via /proc/sys/fs/inotify/ */
static int inotify_max_queued_events __read_mostly;
-struct kmem_cache *inotify_inode_mark_cachep __read_mostly;
+struct kmem_cache *inotify_inode_mark_cachep __ro_after_init;
#ifdef CONFIG_SYSCTL
diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index f0937902f7b46e48d51b6dbcd0a46dc1ae5b569a..91b32b2377acc9336cbe03a5c7be2d4cfe4e9cda 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -967,7 +967,14 @@ int ocfs2_num_free_extents(struct ocfs2_extent_tree *et)
el = &eb->h_list;
}
- BUG_ON(el->l_tree_depth != 0);
+ if (el->l_tree_depth != 0) {
+ retval = ocfs2_error(ocfs2_metadata_cache_get_super(et->et_ci),
+ "Owner %llu has leaf extent block %llu with an invalid l_tree_depth of %u\n",
+ (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci),
+ (unsigned long long)last_eb_blk,
+ le16_to_cpu(el->l_tree_depth));
+ goto bail;
+ }
retval = le16_to_cpu(el->l_count) - le16_to_cpu(el->l_next_free_rec);
bail:
@@ -7642,7 +7649,7 @@ int ocfs2_trim_mainbm(struct super_block *sb, struct fstrim_range *range)
goto next_group;
}
out:
- range->len = trimmed * sb->s_blocksize;
+ range->len = trimmed * osb->s_clustersize;
return ret;
}
diff --git a/fs/ocfs2/buffer_head_io.c b/fs/ocfs2/buffer_head_io.c
index 196638a22b48a6bd363b6e97a22f2dbb83c9a2b0..cdb9b9bdea1f6d69a1d122943c48f31b951e1de7 100644
--- a/fs/ocfs2/buffer_head_io.c
+++ b/fs/ocfs2/buffer_head_io.c
@@ -158,7 +158,7 @@ int ocfs2_read_blocks_sync(struct ocfs2_super *osb, u64 block,
if (new_bh && bh) {
/* If middle bh fails, let previous bh
* finish its read and then put it to
- * aovoid bh leak
+ * avoid bh leak
*/
if (!buffer_jbd(bh))
wait_on_buffer(bh);
@@ -345,7 +345,7 @@ int ocfs2_read_blocks(struct ocfs2_caching_info *ci, u64 block, int nr,
if (new_bh && bh) {
/* If middle bh fails, let previous bh
* finish its read and then put it to
- * aovoid bh leak
+ * avoid bh leak
*/
if (!buffer_jbd(bh))
wait_on_buffer(bh);
diff --git a/fs/ocfs2/dlmfs/dlmfs.c b/fs/ocfs2/dlmfs/dlmfs.c
index 9b57d012fd5cfe6c76a4d74694bbddcf2addfedf..85215162c9dd59f25347049f2546c1a1cfd10409 100644
--- a/fs/ocfs2/dlmfs/dlmfs.c
+++ b/fs/ocfs2/dlmfs/dlmfs.c
@@ -80,8 +80,7 @@ static int param_set_dlmfs_capabilities(const char *val,
static int param_get_dlmfs_capabilities(char *buffer,
const struct kernel_param *kp)
{
- return strlcpy(buffer, DLMFS_CAPABILITIES,
- strlen(DLMFS_CAPABILITIES) + 1);
+ return sysfs_emit(buffer, DLMFS_CAPABILITIES);
}
module_param_call(capabilities, param_set_dlmfs_capabilities,
param_get_dlmfs_capabilities, NULL, 0444);
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index ce215565d061ed98686dc075923d7a7503b96cd9..604fea3a26ff0459fb980e81e9eeada89ca74064 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -90,7 +90,7 @@ enum ocfs2_replay_state {
struct ocfs2_replay_map {
unsigned int rm_slots;
enum ocfs2_replay_state rm_state;
- unsigned char rm_replay_slots[];
+ unsigned char rm_replay_slots[] __counted_by(rm_slots);
};
static void ocfs2_replay_map_set_state(struct ocfs2_super *osb, int state)
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index 681e9501cdd35a8a08ce37aec13a6f7e27325cfa..814733ba2f4ba0fba52b985301725fb323efda13 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -1597,6 +1597,10 @@ static int ocfs2_rename(struct mnt_idmap *idmap,
if (update_dot_dot) {
status = ocfs2_update_entry(old_inode, handle,
&old_inode_dot_dot_res, new_dir);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
drop_nlink(old_dir);
if (new_inode) {
drop_nlink(new_inode);
@@ -1636,6 +1640,10 @@ static int ocfs2_rename(struct mnt_idmap *idmap,
INODE_CACHE(old_dir),
old_dir_bh,
OCFS2_JOURNAL_ACCESS_WRITE);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
ocfs2_set_links_count(fe, old_dir->i_nlink);
ocfs2_journal_dirty(handle, old_dir_bh);
diff --git a/fs/ocfs2/quota_local.c b/fs/ocfs2/quota_local.c
index dfaae1e524124d6043bbe36aa1d7a64cca1b236b..e09842fc9d4d3f8e8348bc970dd3a19110c192fd 100644
--- a/fs/ocfs2/quota_local.c
+++ b/fs/ocfs2/quota_local.c
@@ -1240,6 +1240,10 @@ int ocfs2_create_local_dquot(struct dquot *dquot)
&od->dq_local_phys_blk,
&pcount,
NULL);
+ if (status < 0) {
+ mlog_errno(status);
+ goto out;
+ }
/* Initialize dquot structure on disk */
status = ocfs2_local_write_dquot(dquot);
diff --git a/fs/pipe.c b/fs/pipe.c
index 8916c455a469c18e0b56125dac5f553330938fe7..804a7d78945217efd3b5394a8a8e6e7d605a937a 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -864,7 +864,7 @@ void free_pipe_info(struct pipe_inode_info *pipe)
kfree(pipe);
}
-static struct vfsmount *pipe_mnt __read_mostly;
+static struct vfsmount *pipe_mnt __ro_after_init;
/*
* pipefs_dname() is called from d_path().
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 2c2efbe685d872201175a02377b818b1dbf31892..ff08a8957552add31a8fdf98e202f8380d519e50 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -536,12 +536,13 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
/* add up live thread stats at the group level */
if (whole) {
- struct task_struct *t = task;
- do {
+ struct task_struct *t;
+
+ __for_each_thread(sig, t) {
min_flt += t->min_flt;
maj_flt += t->maj_flt;
gtime += task_gtime(t);
- } while_each_thread(task, t);
+ }
min_flt += sig->min_flt;
maj_flt += sig->maj_flt;
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 83396ab149985496eb3a20092a1f43720ab7670c..dd31e3b6bf77cc84d6e05a223e989bc3ea3bb6f7 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1153,11 +1153,10 @@ static int __set_oom_adj(struct file *file, int oom_adj, bool legacy)
static ssize_t oom_adj_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
- char buffer[PROC_NUMBUF];
+ char buffer[PROC_NUMBUF] = {};
int oom_adj;
int err;
- memset(buffer, 0, sizeof(buffer));
if (count > sizeof(buffer) - 1)
count = sizeof(buffer) - 1;
if (copy_from_user(buffer, buf, count)) {
@@ -1213,11 +1212,10 @@ static ssize_t oom_score_adj_read(struct file *file, char __user *buf,
static ssize_t oom_score_adj_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
- char buffer[PROC_NUMBUF];
+ char buffer[PROC_NUMBUF] = {};
int oom_score_adj;
int err;
- memset(buffer, 0, sizeof(buffer));
if (count > sizeof(buffer) - 1)
count = sizeof(buffer) - 1;
if (copy_from_user(buffer, buf, count)) {
@@ -1358,13 +1356,13 @@ static ssize_t proc_fault_inject_write(struct file * file,
const char __user * buf, size_t count, loff_t *ppos)
{
struct task_struct *task;
- char buffer[PROC_NUMBUF];
+ char buffer[PROC_NUMBUF] = {};
int make_it_fail;
int rv;
if (!capable(CAP_SYS_RESOURCE))
return -EPERM;
- memset(buffer, 0, sizeof(buffer));
+
if (count > sizeof(buffer) - 1)
count = sizeof(buffer) - 1;
if (copy_from_user(buffer, buf, count))
@@ -1509,11 +1507,10 @@ sched_autogroup_write(struct file *file, const char __user *buf,
{
struct inode *inode = file_inode(file);
struct task_struct *p;
- char buffer[PROC_NUMBUF];
+ char buffer[PROC_NUMBUF] = {};
int nice;
int err;
- memset(buffer, 0, sizeof(buffer));
if (count > sizeof(buffer) - 1)
count = sizeof(buffer) - 1;
if (copy_from_user(buffer, buf, count))
@@ -1666,10 +1663,9 @@ static ssize_t comm_write(struct file *file, const char __user *buf,
{
struct inode *inode = file_inode(file);
struct task_struct *p;
- char buffer[TASK_COMM_LEN];
+ char buffer[TASK_COMM_LEN] = {};
const size_t maxlen = sizeof(buffer) - 1;
- memset(buffer, 0, sizeof(buffer));
if (copy_from_user(buffer, buf, count > maxlen ? maxlen : count))
return -EFAULT;
@@ -2976,8 +2972,7 @@ static const struct file_operations proc_coredump_filter_operations = {
#ifdef CONFIG_TASK_IO_ACCOUNTING
static int do_io_accounting(struct task_struct *task, struct seq_file *m, int whole)
{
- struct task_io_accounting acct = task->ioac;
- unsigned long flags;
+ struct task_io_accounting acct;
int result;
result = down_read_killable(&task->signal->exec_update_lock);
@@ -2989,15 +2984,28 @@ static int do_io_accounting(struct task_struct *task, struct seq_file *m, int wh
goto out_unlock;
}
- if (whole && lock_task_sighand(task, &flags)) {
- struct task_struct *t = task;
+ if (whole) {
+ struct signal_struct *sig = task->signal;
+ struct task_struct *t;
+ unsigned int seq = 1;
+ unsigned long flags;
+
+ rcu_read_lock();
+ do {
+ seq++; /* 2 on the 1st/lockless path, otherwise odd */
+ flags = read_seqbegin_or_lock_irqsave(&sig->stats_lock, &seq);
- task_io_accounting_add(&acct, &task->signal->ioac);
- while_each_thread(task, t)
- task_io_accounting_add(&acct, &t->ioac);
+ acct = sig->ioac;
+ __for_each_thread(sig, t)
+ task_io_accounting_add(&acct, &t->ioac);
- unlock_task_sighand(task, &flags);
+ } while (need_seqretry(&sig->stats_lock, seq));
+ done_seqretry_irqrestore(&sig->stats_lock, seq, flags);
+ rcu_read_unlock();
+ } else {
+ acct = task->ioac;
}
+
seq_printf(m,
"rchar: %llu\n"
"wchar: %llu\n"
@@ -3818,7 +3826,7 @@ static struct task_struct *first_tid(struct pid *pid, int tid, loff_t f_pos,
for_each_thread(task, pos) {
if (!nr--)
goto found;
- };
+ }
fail:
pos = NULL;
goto out;
@@ -3840,10 +3848,8 @@ static struct task_struct *next_tid(struct task_struct *start)
struct task_struct *pos = NULL;
rcu_read_lock();
if (pid_alive(start)) {
- pos = next_thread(start);
- if (thread_group_leader(pos))
- pos = NULL;
- else
+ pos = __next_thread(start);
+ if (pos)
get_task_struct(pos);
}
rcu_read_unlock();
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 592ed2516f47881458b275951412072ab68d3217..b33e490e3fd9f88f569e3453d603041e665cf6bf 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -110,18 +110,15 @@ void __init proc_init_kmemcache(void)
void proc_invalidate_siblings_dcache(struct hlist_head *inodes, spinlock_t *lock)
{
- struct inode *inode;
- struct proc_inode *ei;
struct hlist_node *node;
struct super_block *old_sb = NULL;
rcu_read_lock();
- for (;;) {
+ while ((node = hlist_first_rcu(inodes))) {
+ struct proc_inode *ei = hlist_entry(node, struct proc_inode, sibling_inodes);
struct super_block *sb;
- node = hlist_first_rcu(inodes);
- if (!node)
- break;
- ei = hlist_entry(node, struct proc_inode, sibling_inodes);
+ struct inode *inode;
+
spin_lock(lock);
hlist_del_init_rcu(&ei->sibling_inodes);
spin_unlock(lock);
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 4abd51053f76d92d0998a4e07f5e021a263c1026..ef2eb12906da88c6fe3a227e82598020f0badc44 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -851,9 +851,7 @@ static void __show_smap(struct seq_file *m, const struct mem_size_stats *mss,
static int show_smap(struct seq_file *m, void *v)
{
struct vm_area_struct *vma = v;
- struct mem_size_stats mss;
-
- memset(&mss, 0, sizeof(mss));
+ struct mem_size_stats mss = {};
smap_gather_stats(vma, &mss, 0);
@@ -879,7 +877,7 @@ static int show_smap(struct seq_file *m, void *v)
static int show_smaps_rollup(struct seq_file *m, void *v)
{
struct proc_maps_private *priv = m->private;
- struct mem_size_stats mss;
+ struct mem_size_stats mss = {};
struct mm_struct *mm = priv->mm;
struct vm_area_struct *vma;
unsigned long vma_start = 0, last_vma_end = 0;
@@ -895,8 +893,6 @@ static int show_smaps_rollup(struct seq_file *m, void *v)
goto out_put_task;
}
- memset(&mss, 0, sizeof(mss));
-
ret = mmap_read_lock_killable(mm);
if (ret)
goto out_put_mm;
@@ -1248,14 +1244,13 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
struct task_struct *task;
- char buffer[PROC_NUMBUF];
+ char buffer[PROC_NUMBUF] = {};
struct mm_struct *mm;
struct vm_area_struct *vma;
enum clear_refs_types type;
int itype;
int rv;
- memset(buffer, 0, sizeof(buffer));
if (count > sizeof(buffer) - 1)
count = sizeof(buffer) - 1;
if (copy_from_user(buffer, buf, count))
diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c
index ac616cfbacf5a8ea64e948c8340de08bfe2462c1..e8af40b0554956e16e9bdd0af00c33c04c424ec6 100644
--- a/fs/userfaultfd.c
+++ b/fs/userfaultfd.c
@@ -49,7 +49,7 @@ static struct ctl_table vm_userfaultfd_table[] = {
};
#endif
-static struct kmem_cache *userfaultfd_ctx_cachep __read_mostly;
+static struct kmem_cache *userfaultfd_ctx_cachep __ro_after_init;
/*
* Start with fault_pending_wqh and fault_wqh so they're more likely
diff --git a/include/linux/compiler-clang.h b/include/linux/compiler-clang.h
index 9b673fefcef8a60b9911492060244bb929e25f12..ddab1ef22beef34b5d81e0ee0573de2806372f74 100644
--- a/include/linux/compiler-clang.h
+++ b/include/linux/compiler-clang.h
@@ -14,11 +14,6 @@
#undef __cleanup
#define __cleanup(func) __maybe_unused __attribute__((__cleanup__(func)))
-/* same as gcc, this was present in clang-2.6 so we can assume it works
- * with any version that can compile the kernel
- */
-#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
-
/* all clang versions usable with the kernel support KASAN ABI version 5 */
#define KASAN_ABI_VERSION 5
diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
index 7af9e34ec261bfbc16483ac72c75383abdcaa8de..2ceba3fe4ec16718d96c874c6eeba8e863631faa 100644
--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -39,8 +39,6 @@
#define __noretpoline __attribute__((__indirect_branch__("keep")))
#endif
-#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
-
#if defined(LATENT_ENTROPY_PLUGIN) && !defined(__CHECKER__)
#define __latent_entropy __attribute__((latent_entropy))
#endif
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index d7779a18b24fc3bfe25ad325e9fa802d7552a7b0..bb1339c7057b49c877907e9db968e828a28d0f3f 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -177,10 +177,7 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val,
__asm__ ("" : "=r" (var) : "0" (var))
#endif
-/* Not-quite-unique ID. */
-#ifndef __UNIQUE_ID
-# define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __LINE__)
-#endif
+#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
/**
* data_race - mark an expression as containing intentional data races
@@ -230,6 +227,14 @@ static inline void *offset_to_ptr(const int *off)
/* &a[0] degrades to a pointer: a different type from an array */
#define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
+/*
+ * This returns a constant expression while determining if an argument is
+ * a constant expression, most importantly without evaluating the argument.
+ * Glory to Martin Uecker <Martin.Uecker@med.uni-goettingen.de>
+ */
+#define __is_constexpr(x) \
+ (sizeof(int) == sizeof(*(8 ? ((void *)((long)(x) * 0l)) : (int *)8)))
+
/*
* Whether 'type' is a signed type or an unsigned type. Supports scalar types,
* bool and also pointer types.
diff --git a/include/linux/const.h b/include/linux/const.h
index 435ddd72d2c464fdedd33889190009dde0a3bda9..81b8aae5a8559c9fabf0665c48d8e8659db4f239 100644
--- a/include/linux/const.h
+++ b/include/linux/const.h
@@ -3,12 +3,4 @@
#include <vdso/const.h>
-/*
- * This returns a constant expression while determining if an argument is
- * a constant expression, most importantly without evaluating the argument.
- * Glory to Martin Uecker <Martin.Uecker@med.uni-goettingen.de>
- */
-#define __is_constexpr(x) \
- (sizeof(int) == sizeof(*(8 ? ((void *)((long)(x) * 0l)) : (int *)8)))
-
#endif /* _LINUX_CONST_H */
diff --git a/include/linux/crash_core.h b/include/linux/crash_core.h
index 08704c29fdb4fc35114c5f8d280b4b73017c2a48..5126a4fecb442846b589981b3a7b82f6d3846d36 100644
--- a/include/linux/crash_core.h
+++ b/include/linux/crash_core.h
@@ -5,6 +5,14 @@
#include <linux/linkage.h>
#include <linux/elfcore.h>
#include <linux/elf.h>
+#ifdef CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
+#include <asm/crash_core.h>
+#endif
+
+/* Location of a reserved region to hold the crash kernel.
+ */
+extern struct resource crashk_res;
+extern struct resource crashk_low_res;
#define CRASH_CORE_NOTE_NAME "CORE"
#define CRASH_CORE_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4)
@@ -79,12 +87,43 @@ Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type,
void *data, size_t data_len);
void final_note(Elf_Word *buf);
+#ifdef CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
+#ifndef DEFAULT_CRASH_KERNEL_LOW_SIZE
+#define DEFAULT_CRASH_KERNEL_LOW_SIZE (128UL << 20)
+#endif
+#endif
+
int __init parse_crashkernel(char *cmdline, unsigned long long system_ram,
- unsigned long long *crash_size, unsigned long long *crash_base);
-int parse_crashkernel_high(char *cmdline, unsigned long long system_ram,
- unsigned long long *crash_size, unsigned long long *crash_base);
-int parse_crashkernel_low(char *cmdline, unsigned long long system_ram,
- unsigned long long *crash_size, unsigned long long *crash_base);
+ unsigned long long *crash_size, unsigned long long *crash_base,
+ unsigned long long *low_size, bool *high);
+
+#ifdef CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
+#ifndef DEFAULT_CRASH_KERNEL_LOW_SIZE
+#define DEFAULT_CRASH_KERNEL_LOW_SIZE (128UL << 20)
+#endif
+#ifndef CRASH_ALIGN
+#define CRASH_ALIGN SZ_2M
+#endif
+#ifndef CRASH_ADDR_LOW_MAX
+#define CRASH_ADDR_LOW_MAX SZ_4G
+#endif
+#ifndef CRASH_ADDR_HIGH_MAX
+#define CRASH_ADDR_HIGH_MAX memblock_end_of_DRAM()
+#endif
+
+void __init reserve_crashkernel_generic(char *cmdline,
+ unsigned long long crash_size,
+ unsigned long long crash_base,
+ unsigned long long crash_low_size,
+ bool high);
+#else
+static inline void __init reserve_crashkernel_generic(char *cmdline,
+ unsigned long long crash_size,
+ unsigned long long crash_base,
+ unsigned long long crash_low_size,
+ bool high)
+{}
+#endif
/* Alignment required for elf header segment */
#define ELF_CORE_HEADER_ALIGN 4096
diff --git a/include/linux/fortify-string.h b/include/linux/fortify-string.h
index 1e7711185ec694a596b0f221f528a27e88514aac..79ef6ac4c02113e92454d94e80565b06073c4722 100644
--- a/include/linux/fortify-string.h
+++ b/include/linux/fortify-string.h
@@ -639,7 +639,7 @@ __FORTIFY_INLINE bool fortify_memcpy_chk(__kernel_size_t size,
__q_size_field, #op), \
#op ": detected field-spanning write (size %zu) of single %s (size %zu)\n", \
__fortify_size, \
- "field \"" #p "\" at " __FILE__ ":" __stringify(__LINE__), \
+ "field \"" #p "\" at " FILE_LINE, \
__p_size_field); \
__underlying_##op(p, q, __fortify_size); \
})
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index 32c78078552ccc19edd82abae84e73c104633c3c..8227455192b73d9c4069d53ae5e544545ec89466 100644
--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -22,10 +22,6 @@
#include <uapi/linux/kexec.h>
#include <linux/verification.h>
-/* Location of a reserved region to hold the crash kernel.
- */
-extern struct resource crashk_res;
-extern struct resource crashk_low_res;
extern note_buf_t __percpu *crash_notes;
#ifdef CONFIG_KEXEC_CORE
diff --git a/include/linux/kstrtox.h b/include/linux/kstrtox.h
index 529974e22ea799adf5c07b48d803ac9bfc1f85a4..7fcf29a4e0de4d14b38855073059437f11879105 100644
--- a/include/linux/kstrtox.h
+++ b/include/linux/kstrtox.h
@@ -147,9 +147,4 @@ extern long simple_strtol(const char *,char **,unsigned int);
extern unsigned long long simple_strtoull(const char *,char **,unsigned int);
extern long long simple_strtoll(const char *,char **,unsigned int);
-static inline int strtobool(const char *s, bool *res)
-{
- return kstrtobool(s, res);
-}
-
#endif /* _LINUX_KSTRTOX_H */
diff --git a/include/linux/kthread.h b/include/linux/kthread.h
index 2c30ade43bc87a1d3ecd44616d3d585433d89558..b11f53c1ba2e6f7f2ad88ba503177535085bbdb5 100644
--- a/include/linux/kthread.h
+++ b/include/linux/kthread.h
@@ -86,6 +86,7 @@ void free_kthread_struct(struct task_struct *k);
void kthread_bind(struct task_struct *k, unsigned int cpu);
void kthread_bind_mask(struct task_struct *k, const struct cpumask *mask);
int kthread_stop(struct task_struct *k);
+int kthread_stop_put(struct task_struct *k);
bool kthread_should_stop(void);
bool kthread_should_park(void);
bool kthread_should_stop_or_park(void);
diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 83aebc244cbaadd2fc0089d760d65bd7d1e4d851..2ec559284a9f6c3b170e8f69dcb557a3097c7e44 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -2,60 +2,77 @@
#ifndef _LINUX_MINMAX_H
#define _LINUX_MINMAX_H
+#include <linux/build_bug.h>
+#include <linux/compiler.h>
#include <linux/const.h>
#include <linux/types.h>
/*
* min()/max()/clamp() macros must accomplish three things:
*
- * - avoid multiple evaluations of the arguments (so side-effects like
+ * - Avoid multiple evaluations of the arguments (so side-effects like
* "x++" happen only once) when non-constant.
- * - perform strict type-checking (to generate warnings instead of
- * nasty runtime surprises). See the "unnecessary" pointer comparison
- * in __typecheck().
- * - retain result as a constant expressions when called with only
+ * - Retain result as a constant expressions when called with only
* constant expressions (to avoid tripping VLA warnings in stack
* allocation usage).
+ * - Perform signed v unsigned type-checking (to generate compile
+ * errors instead of nasty runtime surprises).
+ * - Unsigned char/short are always promoted to signed int and can be
+ * compared against signed or unsigned arguments.
+ * - Unsigned arguments can be compared against non-negative signed constants.
+ * - Comparison of a signed argument against an unsigned constant fails
+ * even if the constant is below __INT_MAX__ and could be cast to int.
*/
#define __typecheck(x, y) \
(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
-#define __no_side_effects(x, y) \
- (__is_constexpr(x) && __is_constexpr(y))
+/* is_signed_type() isn't a constexpr for pointer types */
+#define __is_signed(x) \
+ __builtin_choose_expr(__is_constexpr(is_signed_type(typeof(x))), \
+ is_signed_type(typeof(x)), 0)
-#define __safe_cmp(x, y) \
- (__typecheck(x, y) && __no_side_effects(x, y))
+/* True for a non-negative signed int constant */
+#define __is_noneg_int(x) \
+ (__builtin_choose_expr(__is_constexpr(x) && __is_signed(x), x, -1) >= 0)
-#define __cmp(x, y, op) ((x) op (y) ? (x) : (y))
+#define __types_ok(x, y) \
+ (__is_signed(x) == __is_signed(y) || \
+ __is_signed((x) + 0) == __is_signed((y) + 0) || \
+ __is_noneg_int(x) || __is_noneg_int(y))
-#define __cmp_once(x, y, unique_x, unique_y, op) ({ \
- typeof(x) unique_x = (x); \
- typeof(y) unique_y = (y); \
- __cmp(unique_x, unique_y, op); })
+#define __cmp_op_min <
+#define __cmp_op_max >
-#define __careful_cmp(x, y, op) \
- __builtin_choose_expr(__safe_cmp(x, y), \
- __cmp(x, y, op), \
- __cmp_once(x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y), op))
+#define __cmp(op, x, y) ((x) __cmp_op_##op (y) ? (x) : (y))
+
+#define __cmp_once(op, x, y, unique_x, unique_y) ({ \
+ typeof(x) unique_x = (x); \
+ typeof(y) unique_y = (y); \
+ static_assert(__types_ok(x, y), \
+ #op "(" #x ", " #y ") signedness error, fix types or consider u" #op "() before " #op "_t()"); \
+ __cmp(op, unique_x, unique_y); })
+
+#define __careful_cmp(op, x, y) \
+ __builtin_choose_expr(__is_constexpr((x) - (y)), \
+ __cmp(op, x, y), \
+ __cmp_once(op, x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y)))
#define __clamp(val, lo, hi) \
((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
-#define __clamp_once(val, lo, hi, unique_val, unique_lo, unique_hi) ({ \
- typeof(val) unique_val = (val); \
- typeof(lo) unique_lo = (lo); \
- typeof(hi) unique_hi = (hi); \
- __clamp(unique_val, unique_lo, unique_hi); })
-
-#define __clamp_input_check(lo, hi) \
- (BUILD_BUG_ON_ZERO(__builtin_choose_expr( \
- __is_constexpr((lo) > (hi)), (lo) > (hi), false)))
+#define __clamp_once(val, lo, hi, unique_val, unique_lo, unique_hi) ({ \
+ typeof(val) unique_val = (val); \
+ typeof(lo) unique_lo = (lo); \
+ typeof(hi) unique_hi = (hi); \
+ static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), \
+ (lo) <= (hi), true), \
+ "clamp() low limit " #lo " greater than high limit " #hi); \
+ static_assert(__types_ok(val, lo), "clamp() 'lo' signedness error"); \
+ static_assert(__types_ok(val, hi), "clamp() 'hi' signedness error"); \
+ __clamp(unique_val, unique_lo, unique_hi); })
#define __careful_clamp(val, lo, hi) ({ \
- __clamp_input_check(lo, hi) + \
- __builtin_choose_expr(__typecheck(val, lo) && __typecheck(val, hi) && \
- __typecheck(hi, lo) && __is_constexpr(val) && \
- __is_constexpr(lo) && __is_constexpr(hi), \
+ __builtin_choose_expr(__is_constexpr((val) - (lo) + (hi)), \
__clamp(val, lo, hi), \
__clamp_once(val, lo, hi, __UNIQUE_ID(__val), \
__UNIQUE_ID(__lo), __UNIQUE_ID(__hi))); })
@@ -65,14 +82,31 @@
* @x: first value
* @y: second value
*/
-#define min(x, y) __careful_cmp(x, y, <)
+#define min(x, y) __careful_cmp(min, x, y)
/**
* max - return maximum of two values of the same or compatible types
* @x: first value
* @y: second value
*/
-#define max(x, y) __careful_cmp(x, y, >)
+#define max(x, y) __careful_cmp(max, x, y)
+
+/**
+ * umin - return minimum of two non-negative values
+ * Signed types are zero extended to match a larger unsigned type.
+ * @x: first value
+ * @y: second value
+ */
+#define umin(x, y) \
+ __careful_cmp(min, (x) + 0u + 0ul + 0ull, (y) + 0u + 0ul + 0ull)
+
+/**
+ * umax - return maximum of two non-negative values
+ * @x: first value
+ * @y: second value
+ */
+#define umax(x, y) \
+ __careful_cmp(max, (x) + 0u + 0ul + 0ull, (y) + 0u + 0ul + 0ull)
/**
* min3 - return minimum of three values
@@ -124,7 +158,7 @@
* @x: first value
* @y: second value
*/
-#define min_t(type, x, y) __careful_cmp((type)(x), (type)(y), <)
+#define min_t(type, x, y) __careful_cmp(min, (type)(x), (type)(y))
/**
* max_t - return maximum of two values, using the specified type
@@ -132,28 +166,7 @@
* @x: first value
* @y: second value
*/
-#define max_t(type, x, y) __careful_cmp((type)(x), (type)(y), >)
-
-/*
- * Remove a const qualifier from integer types
- * _Generic(foo, type-name: association, ..., default: association) performs a
- * comparison against the foo type (not the qualified type).
- * Do not use the const keyword in the type-name as it will not match the
- * unqualified type of foo.
- */
-#define __unconst_integer_type_cases(type) \
- unsigned type: (unsigned type)0, \
- signed type: (signed type)0
-
-#define __unconst_integer_typeof(x) typeof( \
- _Generic((x), \
- char: (char)0, \
- __unconst_integer_type_cases(char), \
- __unconst_integer_type_cases(short), \
- __unconst_integer_type_cases(int), \
- __unconst_integer_type_cases(long), \
- __unconst_integer_type_cases(long long), \
- default: (x)))
+#define max_t(type, x, y) __careful_cmp(max, (type)(x), (type)(y))
/*
* Do not check the array parameter using __must_be_array().
@@ -169,13 +182,13 @@
* 'int *buff' and 'int buff[N]' types.
*
* The array can be an array of const items.
- * typeof() keeps the const qualifier. Use __unconst_integer_typeof() in order
+ * typeof() keeps the const qualifier. Use __unqual_scalar_typeof() in order
* to discard the const qualifier for the __element variable.
*/
#define __minmax_array(op, array, len) ({ \
typeof(&(array)[0]) __array = (array); \
typeof(len) __len = (len); \
- __unconst_integer_typeof(__array[0]) __element = __array[--__len]; \
+ __unqual_scalar_typeof(__array[0]) __element = __array[--__len];\
while (__len--) \
__element = op(__element, __array[__len]); \
__element; })
diff --git a/include/linux/sched.h b/include/linux/sched.h
index b49ca40f633550b191dd60e33d86fbf097f17a97..292c316972485dae579a2518b4a2b847d35b961c 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1007,7 +1007,6 @@ struct task_struct {
/* PID/PID hash table linkage. */
struct pid *thread_pid;
struct hlist_node pid_links[PIDTYPE_MAX];
- struct list_head thread_group;
struct list_head thread_node;
struct completion *vfork_done;
diff --git a/include/linux/sched/signal.h b/include/linux/sched/signal.h
index 3b28cff24cc12f708e338ae9a3ae45cd1fb5fb80..3499c1a8b9295a0b3366f4261a30eb11c38d577c 100644
--- a/include/linux/sched/signal.h
+++ b/include/linux/sched/signal.h
@@ -707,15 +707,26 @@ bool same_thread_group(struct task_struct *p1, struct task_struct *p2)
return p1->signal == p2->signal;
}
-static inline struct task_struct *next_thread(const struct task_struct *p)
+/*
+ * returns NULL if p is the last thread in the thread group
+ */
+static inline struct task_struct *__next_thread(struct task_struct *p)
+{
+ return list_next_or_null_rcu(&p->signal->thread_head,
+ &p->thread_node,
+ struct task_struct,
+ thread_node);
+}
+
+static inline struct task_struct *next_thread(struct task_struct *p)
{
- return list_entry_rcu(p->thread_group.next,
- struct task_struct, thread_group);
+ return __next_thread(p) ?: p->group_leader;
}
static inline int thread_group_empty(struct task_struct *p)
{
- return list_empty(&p->thread_group);
+ return thread_group_leader(p) &&
+ list_is_last(&p->thread_node, &p->signal->thread_head);
}
#define delay_group_leader(p) \
diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h
index 386ab580b839b66518ed33cda02fd3c201b064d6..234bcdb1fba459916635067154bedd17d8cfd423 100644
--- a/include/linux/seq_file.h
+++ b/include/linux/seq_file.h
@@ -207,6 +207,21 @@ static const struct file_operations __name ## _fops = { \
.release = single_release, \
}
+#define DEFINE_SHOW_STORE_ATTRIBUTE(__name) \
+static int __name ## _open(struct inode *inode, struct file *file) \
+{ \
+ return single_open(file, __name ## _show, inode->i_private); \
+} \
+ \
+static const struct file_operations __name ## _fops = { \
+ .owner = THIS_MODULE, \
+ .open = __name ## _open, \
+ .read = seq_read, \
+ .write = __name ## _write, \
+ .llseek = seq_lseek, \
+ .release = single_release, \
+}
+
#define DEFINE_PROC_SHOW_ATTRIBUTE(__name) \
static int __name ## _open(struct inode *inode, struct file *file) \
{ \
diff --git a/include/linux/stringify.h b/include/linux/stringify.h
index 841cec8ed525e38eea1fea8c3246fa9e4bbde818..0e84cbe652709d7053f5755401dc7dbed8f71584 100644
--- a/include/linux/stringify.h
+++ b/include/linux/stringify.h
@@ -9,4 +9,6 @@
#define __stringify_1(x...) #x
#define __stringify(x...) __stringify_1(x)
+#define FILE_LINE __FILE__ ":" __stringify(__LINE__)
+
#endif /* !__LINUX_STRINGIFY_H */
diff --git a/include/linux/timer.h b/include/linux/timer.h
index 9162f275819a780def8efeb98cc4b553e1c44d28..26a545bb0153c031e2253efd7d88177f6fb883f4 100644
--- a/include/linux/timer.h
+++ b/include/linux/timer.h
@@ -77,8 +77,7 @@ struct timer_list {
.entry = { .next = TIMER_ENTRY_STATIC }, \
.function = (_function), \
.flags = (_flags), \
- __TIMER_LOCKDEP_MAP_INITIALIZER( \
- __FILE__ ":" __stringify(__LINE__)) \
+ __TIMER_LOCKDEP_MAP_INITIALIZER(FILE_LINE) \
}
#define DEFINE_TIMER(_name, _function) \
diff --git a/init/init_task.c b/init/init_task.c
index f703116e052301b7171304eaf25fe692547f5e60..5727d42149c334a989a2e657b3f71e26ae2899fc 100644
--- a/init/init_task.c
+++ b/init/init_task.c
@@ -133,7 +133,6 @@ struct task_struct init_task
.pi_lock = __RAW_SPIN_LOCK_UNLOCKED(init_task.pi_lock),
.timer_slack_ns = 50000, /* 50 usec default slack */
.thread_pid = &init_struct_pid,
- .thread_group = LIST_HEAD_INIT(init_task.thread_group),
.thread_node = LIST_HEAD_INIT(init_signals.thread_head),
#ifdef CONFIG_AUDIT
.loginuid = INVALID_UID,
diff --git a/kernel/Kconfig.kexec b/kernel/Kconfig.kexec
index 9bfe68fe9676242cc55059894c939c06f5bc5a9c..7aff28ded2f48fbee898ca291f2c29780fb2e9b9 100644
--- a/kernel/Kconfig.kexec
+++ b/kernel/Kconfig.kexec
@@ -110,7 +110,7 @@ config CRASH_DUMP
For more details see Documentation/admin-guide/kdump/kdump.rst
For s390, this option also enables zfcpdump.
- See also <file:Documentation/s390/zfcpdump.rst>
+ See also <file:Documentation/arch/s390/zfcpdump.rst>
config CRASH_HOTPLUG
bool "Update the crash elfcorehdr on system configuration changes"
diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c
index 85a5b306733b08fba26357ee5472ab0ae47dae74..1b07e6f12a07a85a3fc97df244d1120bc4e4c150 100644
--- a/kernel/audit_tree.c
+++ b/kernel/audit_tree.c
@@ -87,8 +87,8 @@ static struct task_struct *prune_thread;
* that makes a difference. Some.
*/
-static struct fsnotify_group *audit_tree_group;
-static struct kmem_cache *audit_tree_mark_cachep __read_mostly;
+static struct fsnotify_group *audit_tree_group __ro_after_init;
+static struct kmem_cache *audit_tree_mark_cachep __ro_after_init;
static struct audit_tree *alloc_tree(const char *s)
{
diff --git a/kernel/crash_core.c b/kernel/crash_core.c
index 2f675ef045d40db9704ad940663847db42bdf196..efe87d501c8c3c002cbdd6124fc0e3026ad82bd7 100644
--- a/kernel/crash_core.c
+++ b/kernel/crash_core.c
@@ -5,7 +5,6 @@
*/
#include <linux/buildid.h>
-#include <linux/crash_core.h>
#include <linux/init.h>
#include <linux/utsname.h>
#include <linux/vmalloc.h>
@@ -13,6 +12,9 @@
#include <linux/kexec.h>
#include <linux/memory.h>
#include <linux/cpuhotplug.h>
+#include <linux/memblock.h>
+#include <linux/kexec.h>
+#include <linux/kmemleak.h>
#include <asm/page.h>
#include <asm/sections.h>
@@ -33,6 +35,22 @@ u32 *vmcoreinfo_note;
/* trusted vmcoreinfo, e.g. we can make a copy in the crash memory */
static unsigned char *vmcoreinfo_data_safecopy;
+/* Location of the reserved area for the crash kernel */
+struct resource crashk_res = {
+ .name = "Crash kernel",
+ .start = 0,
+ .end = 0,
+ .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
+ .desc = IORES_DESC_CRASH_KERNEL
+};
+struct resource crashk_low_res = {
+ .name = "Crash kernel",
+ .start = 0,
+ .end = 0,
+ .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
+ .desc = IORES_DESC_CRASH_KERNEL
+};
+
/*
* parsing the "crashkernel" commandline
*
@@ -248,11 +266,11 @@ static int __init __parse_crashkernel(char *cmdline,
unsigned long long system_ram,
unsigned long long *crash_size,
unsigned long long *crash_base,
- const char *name,
const char *suffix)
{
char *first_colon, *first_space;
char *ck_cmdline;
+ char *name = "crashkernel=";
BUG_ON(!crash_size || !crash_base);
*crash_size = 0;
@@ -283,32 +301,53 @@ static int __init __parse_crashkernel(char *cmdline,
/*
* That function is the entry point for command line parsing and should be
* called from the arch-specific code.
+ *
+ * If crashkernel=,high|low is supported on architecture, non-NULL values
+ * should be passed to parameters 'low_size' and 'high'.
*/
int __init parse_crashkernel(char *cmdline,
unsigned long long system_ram,
unsigned long long *crash_size,
- unsigned long long *crash_base)
+ unsigned long long *crash_base,
+ unsigned long long *low_size,
+ bool *high)
{
- return __parse_crashkernel(cmdline, system_ram, crash_size, crash_base,
- "crashkernel=", NULL);
-}
+ int ret;
-int __init parse_crashkernel_high(char *cmdline,
- unsigned long long system_ram,
- unsigned long long *crash_size,
- unsigned long long *crash_base)
-{
- return __parse_crashkernel(cmdline, system_ram, crash_size, crash_base,
- "crashkernel=", suffix_tbl[SUFFIX_HIGH]);
-}
+ /* crashkernel=X[@offset] */
+ ret = __parse_crashkernel(cmdline, system_ram, crash_size,
+ crash_base, NULL);
+#ifdef CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
+ /*
+ * If non-NULL 'high' passed in and no normal crashkernel
+ * setting detected, try parsing crashkernel=,high|low.
+ */
+ if (high && ret == -ENOENT) {
+ ret = __parse_crashkernel(cmdline, 0, crash_size,
+ crash_base, suffix_tbl[SUFFIX_HIGH]);
+ if (ret || !*crash_size)
+ return -EINVAL;
-int __init parse_crashkernel_low(char *cmdline,
- unsigned long long system_ram,
- unsigned long long *crash_size,
- unsigned long long *crash_base)
-{
- return __parse_crashkernel(cmdline, system_ram, crash_size, crash_base,
- "crashkernel=", suffix_tbl[SUFFIX_LOW]);
+ /*
+ * crashkernel=Y,low can be specified or not, but invalid value
+ * is not allowed.
+ */
+ ret = __parse_crashkernel(cmdline, 0, low_size,
+ crash_base, suffix_tbl[SUFFIX_LOW]);
+ if (ret == -ENOENT) {
+ *low_size = DEFAULT_CRASH_KERNEL_LOW_SIZE;
+ ret = 0;
+ } else if (ret) {
+ return ret;
+ }
+
+ *high = true;
+ }
+#endif
+ if (!*crash_size)
+ ret = -EINVAL;
+
+ return ret;
}
/*
@@ -321,6 +360,109 @@ static int __init parse_crashkernel_dummy(char *arg)
}
early_param("crashkernel", parse_crashkernel_dummy);
+#ifdef CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
+static int __init reserve_crashkernel_low(unsigned long long low_size)
+{
+#ifdef CONFIG_64BIT
+ unsigned long long low_base;
+
+ low_base = memblock_phys_alloc_range(low_size, CRASH_ALIGN, 0, CRASH_ADDR_LOW_MAX);
+ if (!low_base) {
+ pr_err("cannot allocate crashkernel low memory (size:0x%llx).\n", low_size);
+ return -ENOMEM;
+ }
+
+ pr_info("crashkernel low memory reserved: 0x%08llx - 0x%08llx (%lld MB)\n",
+ low_base, low_base + low_size, low_size >> 20);
+
+ crashk_low_res.start = low_base;
+ crashk_low_res.end = low_base + low_size - 1;
+ insert_resource(&iomem_resource, &crashk_low_res);
+#endif
+ return 0;
+}
+
+void __init reserve_crashkernel_generic(char *cmdline,
+ unsigned long long crash_size,
+ unsigned long long crash_base,
+ unsigned long long crash_low_size,
+ bool high)
+{
+ unsigned long long search_end = CRASH_ADDR_LOW_MAX, search_base = 0;
+ bool fixed_base = false;
+
+ /* User specifies base address explicitly. */
+ if (crash_base) {
+ fixed_base = true;
+ search_base = crash_base;
+ search_end = crash_base + crash_size;
+ } else if (high) {
+ search_base = CRASH_ADDR_LOW_MAX;
+ search_end = CRASH_ADDR_HIGH_MAX;
+ }
+
+retry:
+ crash_base = memblock_phys_alloc_range(crash_size, CRASH_ALIGN,
+ search_base, search_end);
+ if (!crash_base) {
+ /*
+ * For crashkernel=size[KMG]@offset[KMG], print out failure
+ * message if can't reserve the specified region.
+ */
+ if (fixed_base) {
+ pr_warn("crashkernel reservation failed - memory is in use.\n");
+ return;
+ }
+
+ /*
+ * For crashkernel=size[KMG], if the first attempt was for
+ * low memory, fall back to high memory, the minimum required
+ * low memory will be reserved later.
+ */
+ if (!high && search_end == CRASH_ADDR_LOW_MAX) {
+ search_end = CRASH_ADDR_HIGH_MAX;
+ search_base = CRASH_ADDR_LOW_MAX;
+ crash_low_size = DEFAULT_CRASH_KERNEL_LOW_SIZE;
+ goto retry;
+ }
+
+ /*
+ * For crashkernel=size[KMG],high, if the first attempt was
+ * for high memory, fall back to low memory.
+ */
+ if (high && search_end == CRASH_ADDR_HIGH_MAX) {
+ search_end = CRASH_ADDR_LOW_MAX;
+ search_base = 0;
+ goto retry;
+ }
+ pr_warn("cannot allocate crashkernel (size:0x%llx)\n",
+ crash_size);
+ return;
+ }
+
+ if ((crash_base > CRASH_ADDR_LOW_MAX) &&
+ crash_low_size && reserve_crashkernel_low(crash_low_size)) {
+ memblock_phys_free(crash_base, crash_size);
+ return;
+ }
+
+ pr_info("crashkernel reserved: 0x%016llx - 0x%016llx (%lld MB)\n",
+ crash_base, crash_base + crash_size, crash_size >> 20);
+
+ /*
+ * The crashkernel memory will be removed from the kernel linear
+ * map. Inform kmemleak so that it won't try to access it.
+ */
+ kmemleak_ignore_phys(crash_base);
+ if (crashk_low_res.end)
+ kmemleak_ignore_phys(crashk_low_res.start);
+
+ crashk_res.start = crash_base;
+ crashk_res.end = crash_base + crash_size - 1;
+ insert_resource(&iomem_resource, &crashk_res);
+}
+#endif
+
int crash_prepare_elf64_headers(struct crash_mem *mem, int need_kernel_map,
void **addr, unsigned long *sz)
{
diff --git a/kernel/exit.c b/kernel/exit.c
index 61ebba96909b98408d4bb802436385e4b25aad75..ee9f43bed49a240ac60c9f4054c663374e36ccf0 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -135,7 +135,6 @@ static void __unhash_process(struct task_struct *p, bool group_dead)
list_del_init(&p->sibling);
__this_cpu_dec(process_counts);
}
- list_del_rcu(&p->thread_group);
list_del_rcu(&p->thread_node);
}
diff --git a/kernel/fork.c b/kernel/fork.c
index 373fa2f739bc41ced8dc9074d84ec1ce5336483a..10917c3e1f0366b5fbf60d98c2042c636cd74c87 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -2577,7 +2577,6 @@ __latent_entropy struct task_struct *copy_process(
p->dirty_paused_when = 0;
p->pdeath_signal = 0;
- INIT_LIST_HEAD(&p->thread_group);
p->task_works = NULL;
clear_posix_cputimers_work(p);
@@ -2705,8 +2704,6 @@ __latent_entropy struct task_struct *copy_process(
atomic_inc(¤t->signal->live);
refcount_inc(¤t->signal->sigcnt);
task_join_group_stop(p);
- list_add_tail_rcu(&p->thread_group,
- &p->group_leader->thread_group);
list_add_tail_rcu(&p->thread_node,
&p->signal->thread_head);
}
diff --git a/kernel/gcov/fs.c b/kernel/gcov/fs.c
index 5c3086cad8f99e076f169311a79e4d6ff7cd3c21..01520689b57c1dd2052c7c2f6cb219944b8081d1 100644
--- a/kernel/gcov/fs.c
+++ b/kernel/gcov/fs.c
@@ -99,7 +99,7 @@ struct gcov_iterator {
struct gcov_info *info;
size_t size;
loff_t pos;
- char buffer[];
+ char buffer[] __counted_by(size);
};
/**
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index d309ba84e08a9d9b0137e82ea2f0209d7afc000e..1782f90cd8c6c7cf7a2b8eaedeb047543d70733a 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -1852,15 +1852,13 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
struct task_struct *t = new->thread;
new->thread = NULL;
- kthread_stop(t);
- put_task_struct(t);
+ kthread_stop_put(t);
}
if (new->secondary && new->secondary->thread) {
struct task_struct *t = new->secondary->thread;
new->secondary->thread = NULL;
- kthread_stop(t);
- put_task_struct(t);
+ kthread_stop_put(t);
}
out_mput:
module_put(desc->owner);
@@ -1971,12 +1969,9 @@ static struct irqaction *__free_irq(struct irq_desc *desc, void *dev_id)
* the same bit to a newly requested action.
*/
if (action->thread) {
- kthread_stop(action->thread);
- put_task_struct(action->thread);
- if (action->secondary && action->secondary->thread) {
- kthread_stop(action->secondary->thread);
- put_task_struct(action->secondary->thread);
- }
+ kthread_stop_put(action->thread);
+ if (action->secondary && action->secondary->thread)
+ kthread_stop_put(action->secondary->thread);
}
/* Last action releases resources */
diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
index 9dc728982d79a4f3c364b103986dd2b7bdee6858..be5642a4ec4906ee262b2e892c89045411b49218 100644
--- a/kernel/kexec_core.c
+++ b/kernel/kexec_core.c
@@ -52,23 +52,6 @@ atomic_t __kexec_lock = ATOMIC_INIT(0);
/* Flag to indicate we are going to kexec a new kernel */
bool kexec_in_progress = false;
-
-/* Location of the reserved area for the crash kernel */
-struct resource crashk_res = {
- .name = "Crash kernel",
- .start = 0,
- .end = 0,
- .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
- .desc = IORES_DESC_CRASH_KERNEL
-};
-struct resource crashk_low_res = {
- .name = "Crash kernel",
- .start = 0,
- .end = 0,
- .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
- .desc = IORES_DESC_CRASH_KERNEL
-};
-
int kexec_should_crash(struct task_struct *p)
{
/*
diff --git a/kernel/kthread.c b/kernel/kthread.c
index c46128ec0c0a2aa9790897af2a32e9cfeaf3641f..c5e40830c1f2d5e91dea786c24fd70f8b76ee488 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -715,6 +715,24 @@ int kthread_stop(struct task_struct *k)
}
EXPORT_SYMBOL(kthread_stop);
+/**
+ * kthread_stop_put - stop a thread and put its task struct
+ * @k: thread created by kthread_create().
+ *
+ * Stops a thread created by kthread_create() and put its task_struct.
+ * Only use when holding an extra task struct reference obtained by
+ * calling get_task_struct().
+ */
+int kthread_stop_put(struct task_struct *k)
+{
+ int ret;
+
+ ret = kthread_stop(k);
+ put_task_struct(k);
+ return ret;
+}
+EXPORT_SYMBOL(kthread_stop_put);
+
int kthreadd(void *unused)
{
struct task_struct *tsk = current;
diff --git a/kernel/panic.c b/kernel/panic.c
index ffa037fa777d5f7f1cb8596893fe90c3fb0a2f46..2807639aab51d1f631fa834dd2c7e1472864b25f 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -192,14 +192,15 @@ atomic_t panic_cpu = ATOMIC_INIT(PANIC_CPU_INVALID);
*/
void nmi_panic(struct pt_regs *regs, const char *msg)
{
- int old_cpu, cpu;
+ int old_cpu, this_cpu;
- cpu = raw_smp_processor_id();
- old_cpu = atomic_cmpxchg(&panic_cpu, PANIC_CPU_INVALID, cpu);
+ old_cpu = PANIC_CPU_INVALID;
+ this_cpu = raw_smp_processor_id();
- if (old_cpu == PANIC_CPU_INVALID)
+ /* atomic_try_cmpxchg updates old_cpu on failure */
+ if (atomic_try_cmpxchg(&panic_cpu, &old_cpu, this_cpu))
panic("%s", msg);
- else if (old_cpu != cpu)
+ else if (old_cpu != this_cpu)
nmi_panic_self_stop(regs);
}
EXPORT_SYMBOL(nmi_panic);
@@ -311,15 +312,18 @@ void panic(const char *fmt, ...)
* stop themself or will wait until they are stopped by the 1st CPU
* with smp_send_stop().
*
- * `old_cpu == PANIC_CPU_INVALID' means this is the 1st CPU which
- * comes here, so go ahead.
+ * cmpxchg success means this is the 1st CPU which comes here,
+ * so go ahead.
* `old_cpu == this_cpu' means we came from nmi_panic() which sets
* panic_cpu to this CPU. In this case, this is also the 1st CPU.
*/
+ old_cpu = PANIC_CPU_INVALID;
this_cpu = raw_smp_processor_id();
- old_cpu = atomic_cmpxchg(&panic_cpu, PANIC_CPU_INVALID, this_cpu);
- if (old_cpu != PANIC_CPU_INVALID && old_cpu != this_cpu)
+ /* atomic_try_cmpxchg updates old_cpu on failure */
+ if (atomic_try_cmpxchg(&panic_cpu, &old_cpu, this_cpu)) {
+ /* go ahead */
+ } else if (old_cpu != this_cpu)
panic_smp_self_stop();
console_verbose();
diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
index 619972c78774f7d2e0ae2ad6fe5aa930ffde9d06..3028b2218aa4485f0aae1c00826f44e952116776 100644
--- a/kernel/pid_namespace.c
+++ b/kernel/pid_namespace.c
@@ -286,12 +286,6 @@ static int pid_ns_ctl_handler(struct ctl_table *table, int write,
if (write && !checkpoint_restore_ns_capable(pid_ns->user_ns))
return -EPERM;
- /*
- * Writing directly to ns' last_pid field is OK, since this field
- * is volatile in a living namespace anyway and a code writing to
- * it should synchronize its usage with external means.
- */
-
next = idr_get_cursor(&pid_ns->idr) - 1;
tmp.data = &next;
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 3d7e2d7026998af5cb85fe12fb0b5442e90f6f63..a708d225c28e861922997ed27a25d1b21f072d2a 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -9869,7 +9869,7 @@ struct task_group root_task_group;
LIST_HEAD(task_groups);
/* Cacheline aligned slab cache for task_group */
-static struct kmem_cache *task_group_cache __read_mostly;
+static struct kmem_cache *task_group_cache __ro_after_init;
#endif
void __init sched_init(void)
diff --git a/kernel/signal.c b/kernel/signal.c
index 83fcbaf0e82de0be624c64bcebf6bbdaeda855c6..47a7602dfe8df43e786b7b33119b71599372b151 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -415,7 +415,7 @@ __sigqueue_alloc(int sig, struct task_struct *t, gfp_t gfp_flags,
int override_rlimit, const unsigned int sigqueue_flags)
{
struct sigqueue *q = NULL;
- struct ucounts *ucounts = NULL;
+ struct ucounts *ucounts;
long sigpending;
/*
@@ -1058,12 +1058,11 @@ static void complete_signal(int sig, struct task_struct *p, enum pid_type type)
signal->flags = SIGNAL_GROUP_EXIT;
signal->group_exit_code = sig;
signal->group_stop_count = 0;
- t = p;
- do {
+ __for_each_thread(signal, t) {
task_clear_jobctl_pending(t, JOBCTL_PENDING_MASK);
sigaddset(&t->pending.signal, SIGKILL);
signal_wake_up(t, 1);
- } while_each_thread(p, t);
+ }
return;
}
}
@@ -1471,16 +1470,21 @@ int group_send_sig_info(int sig, struct kernel_siginfo *info,
int __kill_pgrp_info(int sig, struct kernel_siginfo *info, struct pid *pgrp)
{
struct task_struct *p = NULL;
- int retval, success;
+ int ret = -ESRCH;
- success = 0;
- retval = -ESRCH;
do_each_pid_task(pgrp, PIDTYPE_PGID, p) {
int err = group_send_sig_info(sig, info, p, PIDTYPE_PGID);
- success |= !err;
- retval = err;
+ /*
+ * If group_send_sig_info() succeeds at least once ret
+ * becomes 0 and after that the code below has no effect.
+ * Otherwise we return the last err or -ESRCH if this
+ * process group is empty.
+ */
+ if (ret)
+ ret = err;
} while_each_pid_task(pgrp, PIDTYPE_PGID, p);
- return success ? 0 : retval;
+
+ return ret;
}
int kill_pid_info(int sig, struct kernel_siginfo *info, struct pid *pid)
diff --git a/kernel/smpboot.c b/kernel/smpboot.c
index f47d8f375946bd6c315ac7e765825a0a0408cec8..1992b62e980b767a976b288cf981c2ed7b6d513f 100644
--- a/kernel/smpboot.c
+++ b/kernel/smpboot.c
@@ -272,8 +272,7 @@ static void smpboot_destroy_threads(struct smp_hotplug_thread *ht)
struct task_struct *tsk = *per_cpu_ptr(ht->store, cpu);
if (tsk) {
- kthread_stop(tsk);
- put_task_struct(tsk);
+ kthread_stop_put(tsk);
*per_cpu_ptr(ht->store, cpu) = NULL;
}
}
diff --git a/kernel/sys.c b/kernel/sys.c
index 4a8073c1b2558e6d5f050316b21c3da7e15c4331..420d9cb9cc8e203f50014bb2ec564f6598d9869c 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1786,6 +1786,7 @@ void getrusage(struct task_struct *p, int who, struct rusage *r)
unsigned long flags;
u64 tgutime, tgstime, utime, stime;
unsigned long maxrss = 0;
+ struct signal_struct *sig = p->signal;
memset((char *)r, 0, sizeof (*r));
utime = stime = 0;
@@ -1793,7 +1794,7 @@ void getrusage(struct task_struct *p, int who, struct rusage *r)
if (who == RUSAGE_THREAD) {
task_cputime_adjusted(current, &utime, &stime);
accumulate_thread_rusage(p, r);
- maxrss = p->signal->maxrss;
+ maxrss = sig->maxrss;
goto out;
}
@@ -1803,15 +1804,15 @@ void getrusage(struct task_struct *p, int who, struct rusage *r)
switch (who) {
case RUSAGE_BOTH:
case RUSAGE_CHILDREN:
- utime = p->signal->cutime;
- stime = p->signal->cstime;
- r->ru_nvcsw = p->signal->cnvcsw;
- r->ru_nivcsw = p->signal->cnivcsw;
- r->ru_minflt = p->signal->cmin_flt;
- r->ru_majflt = p->signal->cmaj_flt;
- r->ru_inblock = p->signal->cinblock;
- r->ru_oublock = p->signal->coublock;
- maxrss = p->signal->cmaxrss;
+ utime = sig->cutime;
+ stime = sig->cstime;
+ r->ru_nvcsw = sig->cnvcsw;
+ r->ru_nivcsw = sig->cnivcsw;
+ r->ru_minflt = sig->cmin_flt;
+ r->ru_majflt = sig->cmaj_flt;
+ r->ru_inblock = sig->cinblock;
+ r->ru_oublock = sig->coublock;
+ maxrss = sig->cmaxrss;
if (who == RUSAGE_CHILDREN)
break;
@@ -1821,18 +1822,16 @@ void getrusage(struct task_struct *p, int who, struct rusage *r)
thread_group_cputime_adjusted(p, &tgutime, &tgstime);
utime += tgutime;
stime += tgstime;
- r->ru_nvcsw += p->signal->nvcsw;
- r->ru_nivcsw += p->signal->nivcsw;
- r->ru_minflt += p->signal->min_flt;
- r->ru_majflt += p->signal->maj_flt;
- r->ru_inblock += p->signal->inblock;
- r->ru_oublock += p->signal->oublock;
- if (maxrss < p->signal->maxrss)
- maxrss = p->signal->maxrss;
- t = p;
- do {
+ r->ru_nvcsw += sig->nvcsw;
+ r->ru_nivcsw += sig->nivcsw;
+ r->ru_minflt += sig->min_flt;
+ r->ru_majflt += sig->maj_flt;
+ r->ru_inblock += sig->inblock;
+ r->ru_oublock += sig->oublock;
+ if (maxrss < sig->maxrss)
+ maxrss = sig->maxrss;
+ __for_each_thread(sig, t)
accumulate_thread_rusage(t, r);
- } while_each_thread(p, t);
break;
default:
diff --git a/kernel/taskstats.c b/kernel/taskstats.c
index 8ce3fa0c19e2d7ae7457469da00d184d5834aadc..4354ea231fabd7dc53be2f61fae0cad043d3c81d 100644
--- a/kernel/taskstats.c
+++ b/kernel/taskstats.c
@@ -233,9 +233,8 @@ static int fill_stats_for_tgid(pid_t tgid, struct taskstats *stats)
else
memset(stats, 0, sizeof(*stats));
- tsk = first;
start_time = ktime_get_ns();
- do {
+ for_each_thread(first, tsk) {
if (tsk->exit_state)
continue;
/*
@@ -258,7 +257,7 @@ static int fill_stats_for_tgid(pid_t tgid, struct taskstats *stats)
stats->nvcsw += tsk->nvcsw;
stats->nivcsw += tsk->nivcsw;
- } while_each_thread(first, tsk);
+ }
unlock_task_sighand(first, &flags);
rc = 0;
diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c
index d52a894ecf57d0abfb33e196d8fae879c6c6f884..eabe8bcc70426519bdfef4b08e53a86451ba76c2 100644
--- a/kernel/user_namespace.c
+++ b/kernel/user_namespace.c
@@ -22,7 +22,7 @@
#include <linux/bsearch.h>
#include <linux/sort.h>
-static struct kmem_cache *user_ns_cachep __read_mostly;
+static struct kmem_cache *user_ns_cachep __ro_after_init;
static DEFINE_MUTEX(userns_state_mutex);
static bool new_idmap_permitted(const struct file *file,
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 0f682da96e1c52ea42aa8a23590cf8448fa27334..6e578f576a6f2b73b98817b0f5489a79c9d85524 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -418,21 +418,21 @@ static struct workqueue_attrs *ordered_wq_attrs[NR_STD_WORKER_POOLS];
* process context while holding a pool lock. Bounce to a dedicated kthread
* worker to avoid A-A deadlocks.
*/
-static struct kthread_worker *pwq_release_worker;
+static struct kthread_worker *pwq_release_worker __ro_after_init;
-struct workqueue_struct *system_wq __read_mostly;
+struct workqueue_struct *system_wq __ro_after_init;
EXPORT_SYMBOL(system_wq);
-struct workqueue_struct *system_highpri_wq __read_mostly;
+struct workqueue_struct *system_highpri_wq __ro_after_init;
EXPORT_SYMBOL_GPL(system_highpri_wq);
-struct workqueue_struct *system_long_wq __read_mostly;
+struct workqueue_struct *system_long_wq __ro_after_init;
EXPORT_SYMBOL_GPL(system_long_wq);
-struct workqueue_struct *system_unbound_wq __read_mostly;
+struct workqueue_struct *system_unbound_wq __ro_after_init;
EXPORT_SYMBOL_GPL(system_unbound_wq);
-struct workqueue_struct *system_freezable_wq __read_mostly;
+struct workqueue_struct *system_freezable_wq __ro_after_init;
EXPORT_SYMBOL_GPL(system_freezable_wq);
-struct workqueue_struct *system_power_efficient_wq __read_mostly;
+struct workqueue_struct *system_power_efficient_wq __ro_after_init;
EXPORT_SYMBOL_GPL(system_power_efficient_wq);
-struct workqueue_struct *system_freezable_power_efficient_wq __read_mostly;
+struct workqueue_struct *system_freezable_power_efficient_wq __ro_after_init;
EXPORT_SYMBOL_GPL(system_freezable_power_efficient_wq);
static int worker_thread(void *__worker);
diff --git a/lib/debugobjects.c b/lib/debugobjects.c
index a517256a270b71e42b07750a6483301f72726653..2a8e9d63fbe38328ce8641e0266efb64b3396ee9 100644
--- a/lib/debugobjects.c
+++ b/lib/debugobjects.c
@@ -89,7 +89,7 @@ static int debug_objects_pool_size __read_mostly
static int debug_objects_pool_min_level __read_mostly
= ODEBUG_POOL_MIN_LEVEL;
static const struct debug_obj_descr *descr_test __read_mostly;
-static struct kmem_cache *obj_cache __read_mostly;
+static struct kmem_cache *obj_cache __ro_after_init;
/*
* Track numbers of kmem_cache_alloc()/free() calls done.
diff --git a/mm/damon/core.c b/mm/damon/core.c
index aa2dc7087cd93192bc21d5d8d6977823ff43c949..630077d95dc60721015ea4b195c85e1c73f484ce 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -735,8 +735,7 @@ static int __damon_stop(struct damon_ctx *ctx)
if (tsk) {
get_task_struct(tsk);
mutex_unlock(&ctx->kdamond_lock);
- kthread_stop(tsk);
- put_task_struct(tsk);
+ kthread_stop_put(tsk);
return 0;
}
mutex_unlock(&ctx->kdamond_lock);
diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index bc2d8ff269c7340283d7a316efe1466a0e10ffa0..064654717843ea4bff84bef4a5bd9e8f174a44d9 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -91,7 +91,7 @@ static unsigned int khugepaged_max_ptes_shared __read_mostly;
#define MM_SLOTS_HASH_BITS 10
static DEFINE_READ_MOSTLY_HASHTABLE(mm_slots_hash, MM_SLOTS_HASH_BITS);
-static struct kmem_cache *mm_slot_cache __read_mostly;
+static struct kmem_cache *mm_slot_cache __ro_after_init;
struct collapse_control {
bool is_khugepaged;
diff --git a/mm/shmem.c b/mm/shmem.c
index 71b8d957b63bec8384feb8c369289afcd95d65b4..91e2620148b2f6d789420e6736daef7a53e2cc5c 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -42,7 +42,7 @@
#include <linux/iversion.h>
#include "swap.h"
-static struct vfsmount *shm_mnt;
+static struct vfsmount *shm_mnt __ro_after_init;
#ifdef CONFIG_SHMEM
/*
@@ -4400,7 +4400,7 @@ static const struct fs_context_operations shmem_fs_context_ops = {
#endif
};
-static struct kmem_cache *shmem_inode_cachep;
+static struct kmem_cache *shmem_inode_cachep __ro_after_init;
static struct inode *shmem_alloc_inode(struct super_block *sb)
{
@@ -4432,14 +4432,14 @@ static void shmem_init_inode(void *foo)
inode_init_once(&info->vfs_inode);
}
-static void shmem_init_inodecache(void)
+static void __init shmem_init_inodecache(void)
{
shmem_inode_cachep = kmem_cache_create("shmem_inode_cache",
sizeof(struct shmem_inode_info),
0, SLAB_PANIC|SLAB_ACCOUNT, shmem_init_inode);
}
-static void shmem_destroy_inodecache(void)
+static void __init shmem_destroy_inodecache(void)
{
kmem_cache_destroy(shmem_inode_cachep);
}
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index 8afcfadf8d5a28d2e195484f9dd75194c03cf45f..57cea67b75624696dd521904fb6eb36864c1e7eb 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -4032,8 +4032,7 @@ static void __net_exit pg_net_exit(struct net *net)
list_for_each_safe(q, n, &list) {
t = list_entry(q, struct pktgen_thread, th_list);
list_del(&t->th_list);
- kthread_stop(t->tsk);
- put_task_struct(t->tsk);
+ kthread_stop_put(t->tsk);
kfree(t);
}
diff --git a/scripts/gdb/linux/constants.py.in b/scripts/gdb/linux/constants.py.in
index e3517d4ab8ec9455a1fea7859c09e1afcb9419fe..e810e0c27ff18d3adc16fda616888e45f6e7d7da 100644
--- a/scripts/gdb/linux/constants.py.in
+++ b/scripts/gdb/linux/constants.py.in
@@ -66,10 +66,11 @@ LX_GDBPARSED(IRQD_LEVEL)
LX_GDBPARSED(IRQ_HIDDEN)
/* linux/module.h */
-LX_GDBPARSED(MOD_TEXT)
-LX_GDBPARSED(MOD_DATA)
-LX_GDBPARSED(MOD_RODATA)
-LX_GDBPARSED(MOD_RO_AFTER_INIT)
+if IS_BUILTIN(CONFIG_MODULES):
+ LX_GDBPARSED(MOD_TEXT)
+ LX_GDBPARSED(MOD_DATA)
+ LX_GDBPARSED(MOD_RODATA)
+ LX_GDBPARSED(MOD_RO_AFTER_INIT)
/* linux/mount.h */
LX_VALUE(MNT_NOSUID)
@@ -157,3 +158,4 @@ LX_CONFIG(CONFIG_STACKDEPOT)
LX_CONFIG(CONFIG_PAGE_OWNER)
LX_CONFIG(CONFIG_SLUB_DEBUG)
LX_CONFIG(CONFIG_SLAB_FREELIST_HARDENED)
+LX_CONFIG(CONFIG_MMU)
diff --git a/scripts/gdb/linux/cpus.py b/scripts/gdb/linux/cpus.py
index 255dc18cb9da457d40c143daeb0c64af1236fdad..cba589e5b57d61e6a4bb57280aeea76395737b24 100644
--- a/scripts/gdb/linux/cpus.py
+++ b/scripts/gdb/linux/cpus.py
@@ -179,6 +179,21 @@ def get_current_task(cpu):
else:
raise gdb.GdbError("Sorry, obtaining the current task is not allowed "
"while running in userspace(EL0)")
+ elif utils.is_target_arch("riscv"):
+ current_tp = gdb.parse_and_eval("$tp")
+ scratch_reg = gdb.parse_and_eval("$sscratch")
+
+ # by default tp points to current task
+ current_task = current_tp.cast(task_ptr_type)
+
+ # scratch register is set 0 in trap handler after entering kernel.
+ # When hart is in user mode, scratch register is pointing to task_struct.
+ # and tp is used by user mode. So when scratch register holds larger value
+ # (negative address as ulong is larger value) than tp, then use scratch register.
+ if (scratch_reg.cast(utils.get_ulong_type()) > current_tp.cast(utils.get_ulong_type())):
+ current_task = scratch_reg.cast(task_ptr_type)
+
+ return current_task.dereference()
else:
raise gdb.GdbError("Sorry, obtaining the current task is not yet "
"supported with this arch")
diff --git a/scripts/gdb/linux/vmalloc.py b/scripts/gdb/linux/vmalloc.py
index 48e4a4fae7bbfd5b368ae5c276891c22ec39accf..d3c8a0274d1edaed141e674b4517a4fb79afe790 100644
--- a/scripts/gdb/linux/vmalloc.py
+++ b/scripts/gdb/linux/vmalloc.py
@@ -10,8 +10,9 @@ import gdb
import re
from linux import lists, utils, stackdepot, constants, mm
-vmap_area_type = utils.CachedType('struct vmap_area')
-vmap_area_ptr_type = vmap_area_type.get_type().pointer()
+if constants.LX_CONFIG_MMU:
+ vmap_area_type = utils.CachedType('struct vmap_area')
+ vmap_area_ptr_type = vmap_area_type.get_type().pointer()
def is_vmalloc_addr(x):
pg_ops = mm.page_ops().ops
@@ -25,6 +26,9 @@ class LxVmallocInfo(gdb.Command):
super(LxVmallocInfo, self).__init__("lx-vmallocinfo", gdb.COMMAND_DATA)
def invoke(self, arg, from_tty):
+ if not constants.LX_CONFIG_MMU:
+ raise gdb.GdbError("Requires MMU support")
+
vmap_area_list = gdb.parse_and_eval('vmap_area_list')
for vmap_area in lists.list_for_each_entry(vmap_area_list, vmap_area_ptr_type, "list"):
if not vmap_area['vm']:
diff --git a/scripts/get_maintainer.pl b/scripts/get_maintainer.pl
index ab123b498fd9ba12f558198c04c6fa48ec4c23d0..16d8ac6005b6fceae9aa0bd9e2e525e4986be76a 100755
--- a/scripts/get_maintainer.pl
+++ b/scripts/get_maintainer.pl
@@ -57,6 +57,7 @@ my $subsystem = 0;
my $status = 0;
my $letters = "";
my $keywords = 1;
+my $keywords_in_file = 0;
my $sections = 0;
my $email_file_emails = 0;
my $from_filename = 0;
@@ -272,6 +273,7 @@ if (!GetOptions(
'letters=s' => \$letters,
'pattern-depth=i' => \$pattern_depth,
'k|keywords!' => \$keywords,
+ 'kf|keywords-in-file!' => \$keywords_in_file,
'sections!' => \$sections,
'fe|file-emails!' => \$email_file_emails,
'f|file' => \$from_filename,
@@ -318,6 +320,7 @@ if ($sections || $letters ne "") {
$subsystem = 0;
$web = 0;
$keywords = 0;
+ $keywords_in_file = 0;
$interactive = 0;
} else {
my $selections = $email + $scm + $status + $subsystem + $web;
@@ -548,16 +551,14 @@ foreach my $file (@ARGV) {
$file =~ s/^\Q${cur_path}\E//; #strip any absolute path
$file =~ s/^\Q${lk_path}\E//; #or the path to the lk tree
push(@files, $file);
- if ($file ne "MAINTAINERS" && -f $file && $keywords) {
+ if ($file ne "MAINTAINERS" && -f $file && $keywords && $keywords_in_file) {
open(my $f, '<', $file)
or die "$P: Can't open $file: $!\n";
my $text = do { local($/) ; <$f> };
close($f);
- if ($keywords) {
- foreach my $line (keys %keyword_hash) {
- if ($text =~ m/$keyword_hash{$line}/x) {
- push(@keyword_tvi, $line);
- }
+ foreach my $line (keys %keyword_hash) {
+ if ($text =~ m/$keyword_hash{$line}/x) {
+ push(@keyword_tvi, $line);
}
}
}
@@ -919,7 +920,7 @@ sub get_maintainers {
}
foreach my $line (sort {$hash{$b} <=> $hash{$a}} keys %hash) {
- add_categories($line);
+ add_categories($line, "");
if ($sections) {
my $i;
my $start = find_starting_index($line);
@@ -947,7 +948,7 @@ sub get_maintainers {
if ($keywords) {
@keyword_tvi = sort_and_uniq(@keyword_tvi);
foreach my $line (@keyword_tvi) {
- add_categories($line);
+ add_categories($line, ":Keyword:$keyword_hash{$line}");
}
}
@@ -1076,6 +1077,7 @@ Output type options:
Other options:
--pattern-depth => Number of pattern directory traversals (default: 0 (all))
--keywords => scan patch for keywords (default: $keywords)
+ --keywords-in-file => scan file for keywords (default: $keywords_in_file)
--sections => print all of the subsystem sections with pattern matches
--letters => print all matching 'letter' types from all matching sections
--mailmap => use .mailmap file (default: $email_use_mailmap)
@@ -1086,7 +1088,7 @@ Other options:
Default options:
[--email --tree --nogit --git-fallback --m --r --n --l --multiline
- --pattern-depth=0 --remove-duplicates --rolestats]
+ --pattern-depth=0 --remove-duplicates --rolestats --keywords]
Notes:
Using "-f directory" may give unexpected results:
@@ -1312,7 +1314,7 @@ sub get_list_role {
}
sub add_categories {
- my ($index) = @_;
+ my ($index, $suffix) = @_;
my $i;
my $start = find_starting_index($index);
@@ -1342,7 +1344,7 @@ sub add_categories {
if (!$hash_list_to{lc($list_address)}) {
$hash_list_to{lc($list_address)} = 1;
push(@list_to, [$list_address,
- "subscriber list${list_role}"]);
+ "subscriber list${list_role}" . $suffix]);
}
}
} else {
@@ -1352,12 +1354,12 @@ sub add_categories {
if ($email_moderated_list) {
$hash_list_to{lc($list_address)} = 1;
push(@list_to, [$list_address,
- "moderated list${list_role}"]);
+ "moderated list${list_role}" . $suffix]);
}
} else {
$hash_list_to{lc($list_address)} = 1;
push(@list_to, [$list_address,
- "open list${list_role}"]);
+ "open list${list_role}" . $suffix]);
}
}
}
@@ -1365,19 +1367,19 @@ sub add_categories {
} elsif ($ptype eq "M") {
if ($email_maintainer) {
my $role = get_maintainer_role($i);
- push_email_addresses($pvalue, $role);
+ push_email_addresses($pvalue, $role . $suffix);
}
} elsif ($ptype eq "R") {
if ($email_reviewer) {
my $subsystem = get_subsystem_name($i);
- push_email_addresses($pvalue, "reviewer:$subsystem");
+ push_email_addresses($pvalue, "reviewer:$subsystem" . $suffix);
}
} elsif ($ptype eq "T") {
- push(@scm, $pvalue);
+ push(@scm, $pvalue . $suffix);
} elsif ($ptype eq "W") {
- push(@web, $pvalue);
+ push(@web, $pvalue . $suffix);
} elsif ($ptype eq "S") {
- push(@status, $pvalue);
+ push(@status, $pvalue . $suffix);
}
}
}
diff --git a/scripts/show_delta b/scripts/show_delta
index 28e67e178194191bb1b4c2f5b02bc727470e67b1..291ad65e30894645205101e3f31f2e38e90e172e 100755
--- a/scripts/show_delta
+++ b/scripts/show_delta
@@ -125,4 +125,5 @@ def main():
for line in lines:
print (convert_line(line, base_time),)
-main()
+if __name__ == "__main__":
+ main()
diff --git a/security/integrity/iint.c b/security/integrity/iint.c
index 27ea19fb1f54c7b0ec384ab66a6dea10977ddbd5..d4419a2a1e24be840d71b5ca8927c3d52f9704f7 100644
--- a/security/integrity/iint.c
+++ b/security/integrity/iint.c
@@ -23,7 +23,7 @@
static struct rb_root integrity_iint_tree = RB_ROOT;
static DEFINE_RWLOCK(integrity_iint_lock);
-static struct kmem_cache *iint_cache __read_mostly;
+static struct kmem_cache *iint_cache __ro_after_init;
struct dentry *integrity_dir;
diff --git a/sound/pci/asihpi/hpidebug.h b/sound/pci/asihpi/hpidebug.h
index c24ed69eb74314406274a5f52f1d12712a0d83e2..c6dfc229213d50ae92efe58578a7dd07ce404c9b 100644
--- a/sound/pci/asihpi/hpidebug.h
+++ b/sound/pci/asihpi/hpidebug.h
@@ -29,16 +29,15 @@ enum { HPI_DEBUG_LEVEL_ERROR = 0, /* always log errors */
the start of each message, eg see linux kernel hpios.h */
#ifdef SOURCEFILE_NAME
+#undef FILE_LINE
#define FILE_LINE SOURCEFILE_NAME ":" __stringify(__LINE__) " "
-#else
-#define FILE_LINE __FILE__ ":" __stringify(__LINE__) " "
#endif
#define HPI_DEBUG_ASSERT(expression) \
do { \
if (!(expression)) { \
printk(KERN_ERR FILE_LINE \
- "ASSERT " __stringify(expression)); \
+ " ASSERT " __stringify(expression)); \
} \
} while (0)
@@ -46,7 +45,7 @@ enum { HPI_DEBUG_LEVEL_ERROR = 0, /* always log errors */
do { \
if (hpi_debug_level >= HPI_DEBUG_LEVEL_##level) { \
printk(HPI_DEBUG_FLAG_##level \
- FILE_LINE __VA_ARGS__); \
+ FILE_LINE " " __VA_ARGS__); \
} \
} while (0)
@@ -70,7 +69,7 @@ void hpi_debug_data(u16 *pdata, u32 len);
do { \
if (hpi_debug_level >= HPI_DEBUG_LEVEL_##level) { \
hpi_debug_message(phm, HPI_DEBUG_FLAG_##level \
- FILE_LINE __stringify(level)); \
+ FILE_LINE " " __stringify(level)); \
} \
} while (0)
diff --git a/tools/include/linux/compiler.h b/tools/include/linux/compiler.h
index 1684216e826a3547b748d60eab068e3e375d9068..7b65566f3e427254615da2cabf09962caa93369b 100644
--- a/tools/include/linux/compiler.h
+++ b/tools/include/linux/compiler.h
@@ -63,6 +63,14 @@
# define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
#endif
+/*
+ * This returns a constant expression while determining if an argument is
+ * a constant expression, most importantly without evaluating the argument.
+ * Glory to Martin Uecker <Martin.Uecker@med.uni-goettingen.de>
+ */
+#define __is_constexpr(x) \
+ (sizeof(int) == sizeof(*(8 ? ((void *)((long)(x) * 0l)) : (int *)8)))
+
#ifdef __ANDROID__
/*
* FIXME: Big hammer to get rid of tons of:
diff --git a/tools/include/linux/const.h b/tools/include/linux/const.h
index 435ddd72d2c464fdedd33889190009dde0a3bda9..81b8aae5a8559c9fabf0665c48d8e8659db4f239 100644
--- a/tools/include/linux/const.h
+++ b/tools/include/linux/const.h
@@ -3,12 +3,4 @@
#include <vdso/const.h>
-/*
- * This returns a constant expression while determining if an argument is
- * a constant expression, most importantly without evaluating the argument.
- * Glory to Martin Uecker <Martin.Uecker@med.uni-goettingen.de>
- */
-#define __is_constexpr(x) \
- (sizeof(int) == sizeof(*(8 ? ((void *)((long)(x) * 0l)) : (int *)8)))
-
#endif /* _LINUX_CONST_H */
diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh
index bf4c4cd46600e3a709f3993373be19d3a2e2e8c8..cc16f6ca85333225004f06d5e7083700dda1d8c9 100755
--- a/tools/testing/selftests/mm/run_vmtests.sh
+++ b/tools/testing/selftests/mm/run_vmtests.sh
@@ -309,6 +309,7 @@ CATEGORY="hmm" run_test bash ./test_hmm.sh smoke
# MADV_POPULATE_READ and MADV_POPULATE_WRITE tests
CATEGORY="madv_populate" run_test ./madv_populate
+echo 0 | sudo tee /proc/sys/kernel/yama/ptrace_scope
CATEGORY="memfd_secret" run_test ./memfd_secret
# KSM KSM_MERGE_TIME_HUGE_PAGES test with size of 100
diff --git a/tools/testing/selftests/proc/proc-empty-vm.c b/tools/testing/selftests/proc/proc-empty-vm.c
index ee71ce52cb6a7279d2eb70434299f7718ed42b7c..56198d4ca2bf888d5764c39f9b882748b1ed2a83 100644
--- a/tools/testing/selftests/proc/proc-empty-vm.c
+++ b/tools/testing/selftests/proc/proc-empty-vm.c
@@ -23,6 +23,9 @@
* /proc/${pid}/smaps
* /proc/${pid}/smaps_rollup
*/
+#undef _GNU_SOURCE
+#define _GNU_SOURCE
+
#undef NDEBUG
#include <assert.h>
#include <errno.h>
@@ -34,6 +37,7 @@
#include <sys/mman.h>
#include <sys/ptrace.h>
#include <sys/resource.h>
+#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
@@ -42,6 +46,43 @@
#define TEST_VSYSCALL
#endif
+#if defined __amd64__
+ #ifndef SYS_pkey_alloc
+ #define SYS_pkey_alloc 330
+ #endif
+ #ifndef SYS_pkey_free
+ #define SYS_pkey_free 331
+ #endif
+#elif defined __i386__
+ #ifndef SYS_pkey_alloc
+ #define SYS_pkey_alloc 381
+ #endif
+ #ifndef SYS_pkey_free
+ #define SYS_pkey_free 382
+ #endif
+#else
+ #error "SYS_pkey_alloc"
+#endif
+
+static int g_protection_key_support;
+
+static int protection_key_support(void)
+{
+ long rv = syscall(SYS_pkey_alloc, 0, 0);
+ if (rv > 0) {
+ syscall(SYS_pkey_free, (int)rv);
+ return 1;
+ } else if (rv == -1 && errno == ENOSYS) {
+ return 0;
+ } else if (rv == -1 && errno == EINVAL) {
+ // ospke=n
+ return 0;
+ } else {
+ fprintf(stderr, "%s: error: rv %ld, errno %d\n", __func__, rv, errno);
+ exit(EXIT_FAILURE);
+ }
+}
+
/*
* 0: vsyscall VMA doesn't exist vsyscall=none
* 1: vsyscall VMA is --xp vsyscall=xonly
@@ -60,7 +101,7 @@ static const char proc_pid_maps_vsyscall_2[] =
static const char proc_pid_smaps_vsyscall_0[] = "";
static const char proc_pid_smaps_vsyscall_1[] =
-"ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]\n"
+"ffffffffff600000-ffffffffff601000 --xp 00000000 00:00 0 [vsyscall]\n"
"Size: 4 kB\n"
"KernelPageSize: 4 kB\n"
"MMUPageSize: 4 kB\n"
@@ -73,6 +114,7 @@ static const char proc_pid_smaps_vsyscall_1[] =
"Private_Dirty: 0 kB\n"
"Referenced: 0 kB\n"
"Anonymous: 0 kB\n"
+"KSM: 0 kB\n"
"LazyFree: 0 kB\n"
"AnonHugePages: 0 kB\n"
"ShmemPmdMapped: 0 kB\n"
@@ -83,14 +125,10 @@ static const char proc_pid_smaps_vsyscall_1[] =
"SwapPss: 0 kB\n"
"Locked: 0 kB\n"
"THPeligible: 0\n"
-/*
- * "ProtectionKey:" field is conditional. It is possible to check it as well,
- * but I don't have such machine.
- */
;
static const char proc_pid_smaps_vsyscall_2[] =
-"ffffffffff600000-ffffffffff601000 --xp 00000000 00:00 0 [vsyscall]\n"
+"ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]\n"
"Size: 4 kB\n"
"KernelPageSize: 4 kB\n"
"MMUPageSize: 4 kB\n"
@@ -103,6 +141,7 @@ static const char proc_pid_smaps_vsyscall_2[] =
"Private_Dirty: 0 kB\n"
"Referenced: 0 kB\n"
"Anonymous: 0 kB\n"
+"KSM: 0 kB\n"
"LazyFree: 0 kB\n"
"AnonHugePages: 0 kB\n"
"ShmemPmdMapped: 0 kB\n"
@@ -113,10 +152,6 @@ static const char proc_pid_smaps_vsyscall_2[] =
"SwapPss: 0 kB\n"
"Locked: 0 kB\n"
"THPeligible: 0\n"
-/*
- * "ProtectionKey:" field is conditional. It is possible to check it as well,
- * but I'm too tired.
- */
;
static void sigaction_SIGSEGV(int _, siginfo_t *__, void *___)
@@ -238,19 +273,27 @@ static int test_proc_pid_smaps(pid_t pid)
}
perror("open /proc/${pid}/smaps");
return EXIT_FAILURE;
+ }
+ ssize_t rv = read(fd, buf, sizeof(buf));
+ close(fd);
+
+ assert(0 <= rv);
+ assert(rv <= sizeof(buf));
+
+ if (g_vsyscall == 0) {
+ assert(rv == 0);
} else {
- ssize_t rv = read(fd, buf, sizeof(buf));
- close(fd);
- if (g_vsyscall == 0) {
- assert(rv == 0);
- } else {
- size_t len = strlen(g_proc_pid_maps_vsyscall);
- /* TODO "ProtectionKey:" */
- assert(rv > len);
- assert(memcmp(buf, g_proc_pid_maps_vsyscall, len) == 0);
+ size_t len = strlen(g_proc_pid_smaps_vsyscall);
+ assert(rv > len);
+ assert(memcmp(buf, g_proc_pid_smaps_vsyscall, len) == 0);
+
+ if (g_protection_key_support) {
+#define PROTECTION_KEY "ProtectionKey: 0\n"
+ assert(memmem(buf, rv, PROTECTION_KEY, strlen(PROTECTION_KEY)));
}
- return EXIT_SUCCESS;
}
+
+ return EXIT_SUCCESS;
}
static const char g_smaps_rollup[] =
@@ -303,6 +346,95 @@ static int test_proc_pid_smaps_rollup(pid_t pid)
}
}
+static const char *parse_u64(const char *p, const char *const end, uint64_t *rv)
+{
+ *rv = 0;
+ for (; p != end; p += 1) {
+ if ('0' <= *p && *p <= '9') {
+ assert(!__builtin_mul_overflow(*rv, 10, rv));
+ assert(!__builtin_add_overflow(*rv, *p - '0', rv));
+ } else {
+ break;
+ }
+ }
+ assert(p != end);
+ return p;
+}
+
+/*
+ * There seems to be 2 types of valid output:
+ * "0 A A B 0 0 0\n" for dynamic exeuctables,
+ * "0 0 0 B 0 0 0\n" for static executables.
+ */
+static int test_proc_pid_statm(pid_t pid)
+{
+ char buf[4096];
+ snprintf(buf, sizeof(buf), "/proc/%u/statm", pid);
+ int fd = open(buf, O_RDONLY);
+ if (fd == -1) {
+ perror("open /proc/${pid}/statm");
+ return EXIT_FAILURE;
+ }
+
+ ssize_t rv = read(fd, buf, sizeof(buf));
+ close(fd);
+
+ assert(rv >= 0);
+ assert(rv <= sizeof(buf));
+ if (0) {
+ write(1, buf, rv);
+ }
+
+ const char *p = buf;
+ const char *const end = p + rv;
+
+ /* size */
+ assert(p != end && *p++ == '0');
+ assert(p != end && *p++ == ' ');
+
+ uint64_t resident;
+ p = parse_u64(p, end, &resident);
+ assert(p != end && *p++ == ' ');
+
+ uint64_t shared;
+ p = parse_u64(p, end, &shared);
+ assert(p != end && *p++ == ' ');
+
+ uint64_t text;
+ p = parse_u64(p, end, &text);
+ assert(p != end && *p++ == ' ');
+
+ assert(p != end && *p++ == '0');
+ assert(p != end && *p++ == ' ');
+
+ /* data */
+ assert(p != end && *p++ == '0');
+ assert(p != end && *p++ == ' ');
+
+ assert(p != end && *p++ == '0');
+ assert(p != end && *p++ == '\n');
+
+ assert(p == end);
+
+ /*
+ * "text" is "mm->end_code - mm->start_code" at execve(2) time.
+ * munmap() doesn't change it. It can be anything (just link
+ * statically). It can't be 0 because executing to this point
+ * implies at least 1 page of code.
+ */
+ assert(text > 0);
+
+ /*
+ * These two are always equal. Always 0 for statically linked
+ * executables and sometimes 0 for dynamically linked executables.
+ * There is no way to tell one from another without parsing ELF
+ * which is too much for this test.
+ */
+ assert(resident == shared);
+
+ return EXIT_SUCCESS;
+}
+
int main(void)
{
int rv = EXIT_SUCCESS;
@@ -328,6 +460,8 @@ int main(void)
abort();
}
+ g_protection_key_support = protection_key_support();
+
pid_t pid = fork();
if (pid == -1) {
perror("fork");
@@ -389,11 +523,9 @@ int main(void)
if (rv == EXIT_SUCCESS) {
rv = test_proc_pid_smaps_rollup(pid);
}
- /*
- * TODO test /proc/${pid}/statm, task_statm()
- * ->start_code, ->end_code aren't updated by munmap().
- * Output can be "0 0 0 2 0 0 0\n" where "2" can be anything.
- */
+ if (rv == EXIT_SUCCESS) {
+ rv = test_proc_pid_statm(pid);
+ }
/* Cut the rope. */
int wstatus;