From cc937dad85aea4ab9e4f9827d7ea55932c86906b Mon Sep 17 00:00:00 2001
From: Edward Liaw <edliaw@google.com>
Date: Tue, 25 Jun 2024 22:34:45 +0000
Subject: [PATCH] selftests: centralize -D_GNU_SOURCE= to CFLAGS in lib.mk
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Centralize the _GNU_SOURCE definition to CFLAGS in lib.mk. Remove
redundant defines from Makefiles that import lib.mk. Convert any usage of
"#define _GNU_SOURCE 1" to "#define _GNU_SOURCE".
This uses the form "-D_GNU_SOURCE=", which is equivalent to
"#define _GNU_SOURCE".
Otherwise using "-D_GNU_SOURCE" is equivalent to "-D_GNU_SOURCE=1" and
"#define _GNU_SOURCE 1", which is less commonly seen in source code and
would require many changes in selftests to avoid redefinition warnings.
Link: https://lkml.kernel.org/r/20240625223454.1586259-2-edliaw@google.com
Signed-off-by: Edward Liaw <edliaw@google.com>
Suggested-by: John Hubbard <jhubbard@nvidia.com>
Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: André Almeida <andrealmeid@igalia.com>
Cc: Darren Hart <dvhart@infradead.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: David S. Miller <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Jarkko Sakkinen <jarkko@kernel.org>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Kees Cook <kees@kernel.org>
Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Reinette Chatre <reinette.chatre@intel.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
tools/testing/selftests/exec/Makefile | 1 -
tools/testing/selftests/futex/functional/Makefile | 2 +-
tools/testing/selftests/intel_pstate/Makefile | 2 +-
tools/testing/selftests/iommu/Makefile | 2 --
tools/testing/selftests/kvm/Makefile | 2 +-
tools/testing/selftests/lib.mk | 3 +++
tools/testing/selftests/mm/thuge-gen.c | 2 +-
tools/testing/selftests/net/Makefile | 2 +-
tools/testing/selftests/net/tcp_ao/Makefile | 2 +-
tools/testing/selftests/proc/Makefile | 1 -
tools/testing/selftests/resctrl/Makefile | 2 +-
tools/testing/selftests/ring-buffer/Makefile | 1 -
tools/testing/selftests/riscv/mm/Makefile | 2 +-
tools/testing/selftests/sgx/Makefile | 2 +-
tools/testing/selftests/tmpfs/Makefile | 1 -
15 files changed, 12 insertions(+), 15 deletions(-)
diff --git a/tools/testing/selftests/exec/Makefile b/tools/testing/selftests/exec/Makefile
index fb4472ddffd81..c5bdb653422b2 100644
--- a/tools/testing/selftests/exec/Makefile
+++ b/tools/testing/selftests/exec/Makefile
@@ -1,7 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
CFLAGS = -Wall
CFLAGS += -Wno-nonnull
-CFLAGS += -D_GNU_SOURCE
TEST_PROGS := binfmt_script.py
TEST_GEN_PROGS := execveat load_address_4096 load_address_2097152 load_address_16777216 non-regular
diff --git a/tools/testing/selftests/futex/functional/Makefile b/tools/testing/selftests/futex/functional/Makefile
index 994fa3468f170..f79f9bac7918b 100644
--- a/tools/testing/selftests/futex/functional/Makefile
+++ b/tools/testing/selftests/futex/functional/Makefile
@@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
INCLUDES := -I../include -I../../ $(KHDR_INCLUDES)
-CFLAGS := $(CFLAGS) -g -O2 -Wall -D_GNU_SOURCE= -pthread $(INCLUDES) $(KHDR_INCLUDES)
+CFLAGS := $(CFLAGS) -g -O2 -Wall -pthread $(INCLUDES) $(KHDR_INCLUDES)
LDLIBS := -lpthread -lrt
LOCAL_HDRS := \
diff --git a/tools/testing/selftests/intel_pstate/Makefile b/tools/testing/selftests/intel_pstate/Makefile
index 05d66ef50c977..f45372cb00fec 100644
--- a/tools/testing/selftests/intel_pstate/Makefile
+++ b/tools/testing/selftests/intel_pstate/Makefile
@@ -1,5 +1,5 @@
# SPDX-License-Identifier: GPL-2.0
-CFLAGS := $(CFLAGS) -Wall -D_GNU_SOURCE
+CFLAGS := $(CFLAGS) -Wall
LDLIBS += -lm
ARCH ?= $(shell uname -m 2>/dev/null || echo not)
diff --git a/tools/testing/selftests/iommu/Makefile b/tools/testing/selftests/iommu/Makefile
index 32c5fdfd0eefc..fd6477911f247 100644
--- a/tools/testing/selftests/iommu/Makefile
+++ b/tools/testing/selftests/iommu/Makefile
@@ -2,8 +2,6 @@
CFLAGS += -Wall -O2 -Wno-unused-function
CFLAGS += $(KHDR_INCLUDES)
-CFLAGS += -D_GNU_SOURCE
-
TEST_GEN_PROGS :=
TEST_GEN_PROGS += iommufd
TEST_GEN_PROGS += iommufd_fail_nth
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index ac280dcba996d..4ee37abf70ff8 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -231,7 +231,7 @@ LINUX_TOOL_ARCH_INCLUDE = $(top_srcdir)/tools/arch/$(ARCH)/include
endif
CFLAGS += -Wall -Wstrict-prototypes -Wuninitialized -O2 -g -std=gnu99 \
-Wno-gnu-variable-sized-type-not-at-end -MD -MP -DCONFIG_64BIT \
- -D_GNU_SOURCE -fno-builtin-memcmp -fno-builtin-memcpy \
+ -fno-builtin-memcmp -fno-builtin-memcpy \
-fno-builtin-memset -fno-builtin-strnlen \
-fno-stack-protector -fno-PIE -I$(LINUX_TOOL_INCLUDE) \
-I$(LINUX_TOOL_ARCH_INCLUDE) -I$(LINUX_HDR_PATH) -Iinclude \
diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index 429535816dbd4..4984c5d8b6ac9 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -188,6 +188,9 @@ endef
clean: $(if $(TEST_GEN_MODS_DIR),clean_mods_dir)
$(CLEAN)
+# Build with _GNU_SOURCE by default
+CFLAGS += -D_GNU_SOURCE=
+
# Enables to extend CFLAGS and LDFLAGS from command line, e.g.
# make USERCFLAGS=-Werror USERLDFLAGS=-static
CFLAGS += $(USERCFLAGS)
diff --git a/tools/testing/selftests/mm/thuge-gen.c b/tools/testing/selftests/mm/thuge-gen.c
index d50dc71cac321..e4370b79b62ff 100644
--- a/tools/testing/selftests/mm/thuge-gen.c
+++ b/tools/testing/selftests/mm/thuge-gen.c
@@ -13,7 +13,7 @@
sudo ipcs | awk '$1 == "0x00000000" {print $2}' | xargs -n1 sudo ipcrm -m
(warning this will remove all if someone else uses them) */
-#define _GNU_SOURCE 1
+#define _GNU_SOURCE
#include <sys/mman.h>
#include <linux/mman.h>
#include <stdlib.h>
diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile
index d9393569d03a4..2ec3154c607aa 100644
--- a/tools/testing/selftests/net/Makefile
+++ b/tools/testing/selftests/net/Makefile
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
# Makefile for net selftests
-CFLAGS = -Wall -Wl,--no-as-needed -O2 -g
+CFLAGS += -Wall -Wl,--no-as-needed -O2 -g
CFLAGS += -I../../../../usr/include/ $(KHDR_INCLUDES)
# Additional include paths needed by kselftest.h
CFLAGS += -I../
diff --git a/tools/testing/selftests/net/tcp_ao/Makefile b/tools/testing/selftests/net/tcp_ao/Makefile
index 522d991e310eb..bd88b90b902ba 100644
--- a/tools/testing/selftests/net/tcp_ao/Makefile
+++ b/tools/testing/selftests/net/tcp_ao/Makefile
@@ -26,7 +26,7 @@ LIB := $(LIBDIR)/libaotst.a
LDLIBS += $(LIB) -pthread
LIBDEPS := lib/aolib.h Makefile
-CFLAGS := -Wall -O2 -g -D_GNU_SOURCE -fno-strict-aliasing
+CFLAGS += -Wall -O2 -g -fno-strict-aliasing
CFLAGS += $(KHDR_INCLUDES)
CFLAGS += -iquote ./lib/ -I ../../../../include/
diff --git a/tools/testing/selftests/proc/Makefile b/tools/testing/selftests/proc/Makefile
index cd95369254c08..25c34cc9238e9 100644
--- a/tools/testing/selftests/proc/Makefile
+++ b/tools/testing/selftests/proc/Makefile
@@ -1,6 +1,5 @@
# SPDX-License-Identifier: GPL-2.0-only
CFLAGS += -Wall -O2 -Wno-unused-function
-CFLAGS += -D_GNU_SOURCE
LDFLAGS += -pthread
TEST_GEN_PROGS :=
diff --git a/tools/testing/selftests/resctrl/Makefile b/tools/testing/selftests/resctrl/Makefile
index 021863f86053a..f408bd6bfc3d4 100644
--- a/tools/testing/selftests/resctrl/Makefile
+++ b/tools/testing/selftests/resctrl/Makefile
@@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
-CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE
+CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2
CFLAGS += $(KHDR_INCLUDES)
TEST_GEN_PROGS := resctrl_tests
diff --git a/tools/testing/selftests/ring-buffer/Makefile b/tools/testing/selftests/ring-buffer/Makefile
index 627c5fa6d1abe..23605782639ea 100644
--- a/tools/testing/selftests/ring-buffer/Makefile
+++ b/tools/testing/selftests/ring-buffer/Makefile
@@ -1,7 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
CFLAGS += -Wl,-no-as-needed -Wall
CFLAGS += $(KHDR_INCLUDES)
-CFLAGS += -D_GNU_SOURCE
TEST_GEN_PROGS = map_test
diff --git a/tools/testing/selftests/riscv/mm/Makefile b/tools/testing/selftests/riscv/mm/Makefile
index c333263f2b275..4664ed79e20b5 100644
--- a/tools/testing/selftests/riscv/mm/Makefile
+++ b/tools/testing/selftests/riscv/mm/Makefile
@@ -3,7 +3,7 @@
# Originally tools/testing/arm64/abi/Makefile
# Additional include paths needed by kselftest.h and local headers
-CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
+CFLAGS += -std=gnu99 -I.
TEST_GEN_FILES := mmap_default mmap_bottomup
diff --git a/tools/testing/selftests/sgx/Makefile b/tools/testing/selftests/sgx/Makefile
index 867f88ce2570a..03b5e13b872b5 100644
--- a/tools/testing/selftests/sgx/Makefile
+++ b/tools/testing/selftests/sgx/Makefile
@@ -12,7 +12,7 @@ OBJCOPY := $(CROSS_COMPILE)objcopy
endif
INCLUDES := -I$(top_srcdir)/tools/include
-HOST_CFLAGS := -Wall -Werror -g $(INCLUDES) -fPIC
+HOST_CFLAGS := -Wall -Werror -g $(INCLUDES) -fPIC $(CFLAGS)
HOST_LDFLAGS := -z noexecstack -lcrypto
ENCL_CFLAGS += -Wall -Werror -static-pie -nostdlib -ffreestanding -fPIE \
-fno-stack-protector -mrdrnd $(INCLUDES)
diff --git a/tools/testing/selftests/tmpfs/Makefile b/tools/testing/selftests/tmpfs/Makefile
index aa11ccc92e5b0..3be931e1193f0 100644
--- a/tools/testing/selftests/tmpfs/Makefile
+++ b/tools/testing/selftests/tmpfs/Makefile
@@ -1,6 +1,5 @@
# SPDX-License-Identifier: GPL-2.0-only
CFLAGS += -Wall -O2
-CFLAGS += -D_GNU_SOURCE
TEST_GEN_PROGS :=
TEST_GEN_PROGS += bug-link-o-tmpfile
--
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