SLUB: move resiliency check into SYSFS section

Move the resiliency check into the SYSFS section after validate_slab that is
used by the resiliency check.  This will avoid a forward declaration.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/slub.c b/mm/slub.c
index e97627b..07492a8 100644 (file)
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2512,63 +2512,6 @@ static int __init cpucache_init(void)
 __initcall(cpucache_init);
 #endif
 
-#ifdef SLUB_RESILIENCY_TEST
-static unsigned long validate_slab_cache(struct kmem_cache *s);
-
-static void resiliency_test(void)
-{
-       u8 *p;
-
-       printk(KERN_ERR "SLUB resiliency testing\n");
-       printk(KERN_ERR "-----------------------\n");
-       printk(KERN_ERR "A. Corruption after allocation\n");
-
-       p = kzalloc(16, GFP_KERNEL);
-       p[16] = 0x12;
-       printk(KERN_ERR "\n1. kmalloc-16: Clobber Redzone/next pointer"
-                       " 0x12->0x%p\n\n", p + 16);
-
-       validate_slab_cache(kmalloc_caches + 4);
-
-       /* Hmmm... The next two are dangerous */
-       p = kzalloc(32, GFP_KERNEL);
-       p[32 + sizeof(void *)] = 0x34;
-       printk(KERN_ERR "\n2. kmalloc-32: Clobber next pointer/next slab"
-                       " 0x34 -> -0x%p\n", p);
-       printk(KERN_ERR "If allocated object is overwritten then not detectable\n\n");
-
-       validate_slab_cache(kmalloc_caches + 5);
-       p = kzalloc(64, GFP_KERNEL);
-       p += 64 + (get_cycles() & 0xff) * sizeof(void *);
-       *p = 0x56;
-       printk(KERN_ERR "\n3. kmalloc-64: corrupting random byte 0x56->0x%p\n",
-                                                                       p);
-       printk(KERN_ERR "If allocated object is overwritten then not detectable\n\n");
-       validate_slab_cache(kmalloc_caches + 6);
-
-       printk(KERN_ERR "\nB. Corruption after free\n");
-       p = kzalloc(128, GFP_KERNEL);
-       kfree(p);
-       *p = 0x78;
-       printk(KERN_ERR "1. kmalloc-128: Clobber first word 0x78->0x%p\n\n", p);
-       validate_slab_cache(kmalloc_caches + 7);
-
-       p = kzalloc(256, GFP_KERNEL);
-       kfree(p);
-       p[50] = 0x9a;
-       printk(KERN_ERR "\n2. kmalloc-256: Clobber 50th byte 0x9a->0x%p\n\n", p);
-       validate_slab_cache(kmalloc_caches + 8);
-
-       p = kzalloc(512, GFP_KERNEL);
-       kfree(p);
-       p[512] = 0xab;
-       printk(KERN_ERR "\n3. kmalloc-512: Clobber redzone 0xab->0x%p\n\n", p);
-       validate_slab_cache(kmalloc_caches + 9);
-}
-#else
-static void resiliency_test(void) {};
-#endif
-
 void *__kmalloc_track_caller(size_t size, gfp_t gfpflags, void *caller)
 {
        struct kmem_cache *s = get_slab(size, gfpflags);
@@ -2685,6 +2628,61 @@ static unsigned long validate_slab_cache(struct kmem_cache *s)
        return count;
 }
 
+#ifdef SLUB_RESILIENCY_TEST
+static void resiliency_test(void)
+{
+       u8 *p;
+
+       printk(KERN_ERR "SLUB resiliency testing\n");
+       printk(KERN_ERR "-----------------------\n");
+       printk(KERN_ERR "A. Corruption after allocation\n");
+
+       p = kzalloc(16, GFP_KERNEL);
+       p[16] = 0x12;
+       printk(KERN_ERR "\n1. kmalloc-16: Clobber Redzone/next pointer"
+                       " 0x12->0x%p\n\n", p + 16);
+
+       validate_slab_cache(kmalloc_caches + 4);
+
+       /* Hmmm... The next two are dangerous */
+       p = kzalloc(32, GFP_KERNEL);
+       p[32 + sizeof(void *)] = 0x34;
+       printk(KERN_ERR "\n2. kmalloc-32: Clobber next pointer/next slab"
+                       " 0x34 -> -0x%p\n", p);
+       printk(KERN_ERR "If allocated object is overwritten then not detectable\n\n");
+
+       validate_slab_cache(kmalloc_caches + 5);
+       p = kzalloc(64, GFP_KERNEL);
+       p += 64 + (get_cycles() & 0xff) * sizeof(void *);
+       *p = 0x56;
+       printk(KERN_ERR "\n3. kmalloc-64: corrupting random byte 0x56->0x%p\n",
+                                                                       p);
+       printk(KERN_ERR "If allocated object is overwritten then not detectable\n\n");
+       validate_slab_cache(kmalloc_caches + 6);
+
+       printk(KERN_ERR "\nB. Corruption after free\n");
+       p = kzalloc(128, GFP_KERNEL);
+       kfree(p);
+       *p = 0x78;
+       printk(KERN_ERR "1. kmalloc-128: Clobber first word 0x78->0x%p\n\n", p);
+       validate_slab_cache(kmalloc_caches + 7);
+
+       p = kzalloc(256, GFP_KERNEL);
+       kfree(p);
+       p[50] = 0x9a;
+       printk(KERN_ERR "\n2. kmalloc-256: Clobber 50th byte 0x9a->0x%p\n\n", p);
+       validate_slab_cache(kmalloc_caches + 8);
+
+       p = kzalloc(512, GFP_KERNEL);
+       kfree(p);
+       p[512] = 0xab;
+       printk(KERN_ERR "\n3. kmalloc-512: Clobber redzone 0xab->0x%p\n\n", p);
+       validate_slab_cache(kmalloc_caches + 9);
+}
+#else
+static void resiliency_test(void) {};
+#endif
+
 /*
  * Generate lists of code addresses where slabcache objects are allocated
  * and freed.