mm/slub: remove full list manipulation for non-debug slab

Since debug slab is processed by free_to_partial_list(), and only debug
slab which has SLAB_STORE_USER flag would care about the full list, we
can remove these unrelated full list manipulations from __slab_free().

Acked-by: Christoph Lameter (Ampere) <cl@linux.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
(cherry picked from commit a6def11)

Author: Chengming Zhou

mm/slub.c

@@ -3812,7 +3812,6 @@ static void __slab_free(struct kmem_cache *s, struct slab *slab,
 	 * then add it.
 	 */
 	if (!kmem_cache_has_cpu_partial(s) && unlikely(!prior)) {
-		remove_full(s, n, slab);
 		add_partial(n, slab, DEACTIVATE_TO_TAIL);
 		stat(s, FREE_ADD_PARTIAL);
 	}
@@ -3826,9 +3825,6 @@ static void __slab_free(struct kmem_cache *s, struct slab *slab,
 		 */
 		remove_partial(n, slab);
 		stat(s, FREE_REMOVE_PARTIAL);
-	} else {
-		/* Slab must be on the full list */
-		remove_full(s, n, slab);
 	}
 
 	spin_unlock_irqrestore(&n->list_lock, flags);