mm/sl[aou]b: Move list_add() to slab_common.c

Move the code to append the new kmem_cache to the list of slab caches to
the kmem_cache_create code in the shared code.

This is possible now since the acquisition of the mutex was moved into
kmem_cache_create().

Acked-by: David Rientjes <rientjes@google.com>
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>

1 files changed, 7 insertions, 0 deletions

diff --git a/mm/slab_common.c b/mm/slab_common.c
index fe8dc943c28..5190a7cd02b 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -111,6 +111,13 @@ struct kmem_cache *kmem_cache_create(const char *name, size_t size, size_t align
 	if (!s)
 		err = -ENOSYS; /* Until __kmem_cache_create returns code */
 
+	/*
+	 * Check if the slab has actually been created and if it was a
+	 * real instatiation. Aliases do not belong on the list
+	 */
+	if (s && s->refcount == 1)
+		list_add(&s->list, &slab_caches);
+
 out_locked:
 	mutex_unlock(&slab_mutex);
 	put_online_cpus();