mm/sl[aou]b: Move freeing of kmem_cache structure to common code

The freeing action is basically the same in all slab allocators.
Move to the common kmem_cache_destroy() function.

Reviewed-by: Glauber Costa <glommer@parallels.com>
Reviewed-by: Joonsoo Kim <js1304@gmail.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

4 files changed, 1 insertions, 5 deletions

diff --git a/mm/slab.c b/mm/slab.c
index ef94799a1aa5..8ca6ec6301fa 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -2225,7 +2225,6 @@ void __kmem_cache_destroy(struct kmem_cache *cachep)
                         kfree(l3);
                 }
         }
-        kmem_cache_free(kmem_cache, cachep);
 }
 
 
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 5374150f5486..d6deae9108cd 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -154,6 +154,7 @@ void kmem_cache_destroy(struct kmem_cache *s)
                                 rcu_barrier();
 
                         __kmem_cache_destroy(s);
+                        kmem_cache_free(kmem_cache, s);
                 } else {
                         list_add(&s->list, &slab_caches);
                         printk(KERN_ERR "kmem_cache_destroy %s: Slab cache still has objects\n",
diff --git a/mm/slob.c b/mm/slob.c
index 7d272c3dcc08..cb4ab9675293 100644
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -540,8 +540,6 @@ struct kmem_cache *__kmem_cache_create(const char *name, size_t size,
 
 void __kmem_cache_destroy(struct kmem_cache *c)
 {
-        kmemleak_free(c);
-        slob_free(c, sizeof(struct kmem_cache));
 }
 
 void *kmem_cache_alloc_node(struct kmem_cache *c, gfp_t flags, int node)
diff --git a/mm/slub.c b/mm/slub.c
index e0d1e0470309..6f932f7a8219 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -213,7 +213,6 @@ static inline int sysfs_slab_alias(struct kmem_cache *s, const char *p)
 static inline void sysfs_slab_remove(struct kmem_cache *s)
 {
         kfree(s->name);
-        kmem_cache_free(kmem_cache, s);
 }
 
 #endif
@@ -5206,7 +5205,6 @@ static void kmem_cache_release(struct kobject *kobj)
         struct kmem_cache *s = to_slab(kobj);
 
         kfree(s->name);
-        kmem_cache_free(kmem_cache, s);
 }
 
 static const struct sysfs_ops slab_sysfs_ops = {