From 1ba586de22909f48db78682ee791e0213aba73ae Mon Sep 17 00:00:00 2001
From: Mikulas Patocka <mpatocka@redhat.com>
Date: Thu, 5 Apr 2018 16:21:53 -0700
Subject: [PATCH] mm/slab_common.c: remove test if cache name is accessible
Since commit db265eca7700 ("mm/sl[aou]b: Move duping of slab name to
slab_common.c"), the kernel always duplicates the slab cache name when
creating a slab cache, so the test if the slab name is accessible is
useless.
Link: http://lkml.kernel.org/r/alpine.LRH.2.02.1803231133310.22626@file01.intranet.prod.int.rdu2.redhat.com
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
mm/slab_common.c | 19 -------------------
1 file changed, 19 deletions(-)
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 4a4bd71ab7284..2e682a4c88776 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -84,31 +84,12 @@ EXPORT_SYMBOL(kmem_cache_size);
#ifdef CONFIG_DEBUG_VM
static int kmem_cache_sanity_check(const char *name, unsigned int size)
{
- struct kmem_cache *s = NULL;
-
if (!name || in_interrupt() || size < sizeof(void *) ||
size > KMALLOC_MAX_SIZE) {
pr_err("kmem_cache_create(%s) integrity check failed\n", name);
return -EINVAL;
}
- list_for_each_entry(s, &slab_caches, list) {
- char tmp;
- int res;
-
- /*
- * This happens when the module gets unloaded and doesn't
- * destroy its slab cache and no-one else reuses the vmalloc
- * area of the module. Print a warning.
- */
- res = probe_kernel_address(s->name, tmp);
- if (res) {
- pr_err("Slab cache with size %u has lost its name\n",
- s->object_size);
- continue;
- }
- }
-
WARN_ON(strchr(name, ' ')); /* It confuses parsers */
return 0;
}
--
GitLab