mm/sl[aou]b: Extract a common function for kmem_cache_destroy

kmem_cache_destroy does basically the same in all allocators.

Extract common code which is easy since we already have common mutex
handling.

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

1 files changed, 7 insertions, 8 deletions

diff --git a/mm/slob.c b/mm/slob.c
index 5225d28f2694..289be4f4681a 100644
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -538,18 +538,11 @@ struct kmem_cache *__kmem_cache_create(const char *name, size_t size,
         return c;
 }
 
-void kmem_cache_destroy(struct kmem_cache *c)
+void __kmem_cache_destroy(struct kmem_cache *c)
 {
-        mutex_lock(&slab_mutex);
-        list_del(&c->list);
-        mutex_unlock(&slab_mutex);
-
         kmemleak_free(c);
-        if (c->flags & SLAB_DESTROY_BY_RCU)
-                rcu_barrier();
         slob_free(c, sizeof(struct kmem_cache));
 }
-EXPORT_SYMBOL(kmem_cache_destroy);
 
 void *kmem_cache_alloc_node(struct kmem_cache *c, gfp_t flags, int node)
 {
@@ -617,6 +610,12 @@ unsigned int kmem_cache_size(struct kmem_cache *c)
 }
 EXPORT_SYMBOL(kmem_cache_size);
 
+int __kmem_cache_shutdown(struct kmem_cache *c)
+{
+        /* No way to check for remaining objects */
+        return 0;
+}
+
 int kmem_cache_shrink(struct kmem_cache *d)
 {
         return 0;