3 files changed, 26 insertions, 43 deletions

diff --git a/mm/slab.c b/mm/slab.c
index 52cf0b4634d4..7d92f08b88d7 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -2150,8 +2150,6 @@ static int __init_refok setup_cpu_cache(struct kmem_cache *cachep, gfp_t gfp)
  *
  * @name must be valid until the cache is destroyed. This implies that
  * the module calling this has to destroy the cache before getting unloaded.
- * Note that kmem_cache_name() is not guaranteed to return the same pointer,
- * therefore applications must manage it themselves.
  *
  * The flags are
  *
@@ -3843,12 +3841,6 @@ unsigned int kmem_cache_size(struct kmem_cache *cachep)
 }
 EXPORT_SYMBOL(kmem_cache_size);
 
-const char *kmem_cache_name(struct kmem_cache *cachep)
-{
-        return cachep->name;
-}
-EXPORT_SYMBOL_GPL(kmem_cache_name);
-
 /*
  * This initializes kmem_list3 or resizes various caches for all nodes.
  */
diff --git a/mm/slob.c b/mm/slob.c
index 3588eaaef726..46e0aee33a23 100644
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -666,12 +666,6 @@ unsigned int kmem_cache_size(struct kmem_cache *c)
 }
 EXPORT_SYMBOL(kmem_cache_size);
 
-const char *kmem_cache_name(struct kmem_cache *c)
-{
-        return c->name;
-}
-EXPORT_SYMBOL(kmem_cache_name);
-
 int kmem_cache_shrink(struct kmem_cache *d)
 {
         return 0;
diff --git a/mm/slub.c b/mm/slub.c
index ebba3eb19369..e841d8921c22 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -281,6 +281,30 @@ static inline int slab_index(void *p, struct kmem_cache *s, void *addr)
         return (p - addr) / s->size;
 }
 
+static inline size_t slab_ksize(const struct kmem_cache *s)
+{
+#ifdef CONFIG_SLUB_DEBUG
+        /*
+         * Debugging requires use of the padding between object
+         * and whatever may come after it.
+         */
+        if (s->flags & (SLAB_RED_ZONE | SLAB_POISON))
+                return s->objsize;
+
+#endif
+        /*
+         * If we have the need to store the freelist pointer
+         * back there or track user information then we can
+         * only use the space before that information.
+         */
+        if (s->flags & (SLAB_DESTROY_BY_RCU | SLAB_STORE_USER))
+                return s->inuse;
+        /*
+         * Else we can use all the padding etc for the allocation
+         */
+        return s->size;
+}
+
 static inline int order_objects(int order, unsigned long size, int reserved)
 {
         return ((PAGE_SIZE << order) - reserved) / size;
@@ -805,7 +829,7 @@ static inline int slab_pre_alloc_hook(struct kmem_cache *s, gfp_t flags)
 static inline void slab_post_alloc_hook(struct kmem_cache *s, gfp_t flags, void *object)
 {
         flags &= gfp_allowed_mask;
-        kmemcheck_slab_alloc(s, flags, object, s->objsize);
+        kmemcheck_slab_alloc(s, flags, object, slab_ksize(s));
         kmemleak_alloc_recursive(object, s->objsize, 1, s->flags, flags);
 }
 
@@ -2425,12 +2449,6 @@ unsigned int kmem_cache_size(struct kmem_cache *s)
 }
 EXPORT_SYMBOL(kmem_cache_size);
 
-const char *kmem_cache_name(struct kmem_cache *s)
-{
-        return s->name;
-}
-EXPORT_SYMBOL(kmem_cache_name);
-
 static void list_slab_objects(struct kmem_cache *s, struct page *page,
                                                         const char *text)
 {
@@ -2722,7 +2740,6 @@ EXPORT_SYMBOL(__kmalloc_node);
 size_t ksize(const void *object)
 {
         struct page *page;
-        struct kmem_cache *s;
 
         if (unlikely(object == ZERO_SIZE_PTR))
                 return 0;
@@ -2733,28 +2750,8 @@ size_t ksize(const void *object)
                 WARN_ON(!PageCompound(page));
                 return PAGE_SIZE << compound_order(page);
         }
-        s = page->slab;
-
-#ifdef CONFIG_SLUB_DEBUG
-        /*
-         * Debugging requires use of the padding between object
-         * and whatever may come after it.
-         */
-        if (s->flags & (SLAB_RED_ZONE | SLAB_POISON))
-                return s->objsize;
 
-#endif
-        /*
-         * If we have the need to store the freelist pointer
-         * back there or track user information then we can
-         * only use the space before that information.
-         */
-        if (s->flags & (SLAB_DESTROY_BY_RCU | SLAB_STORE_USER))
-                return s->inuse;
-        /*
-         * Else we can use all the padding etc for the allocation
-         */
-        return s->size;
+        return slab_ksize(page->slab);
 }
 EXPORT_SYMBOL(ksize);