[PATCH v2 03/22] slab: Remove dead code in check_slab()

["Matthew Wilcox (Oracle)" <willy@infradead.org>]

We already know the slab passed in is a valid slab.  This looks like a
sensible check, but all callers assume or check that the page belongs
to slab.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Harry Yoo <harry.yoo@oracle.com>
---
 mm/slub.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/mm/slub.c b/mm/slub.c
index 81f08891741a..ac879e9127a2 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1515,11 +1515,6 @@ static int check_slab(struct kmem_cache *s, struct slab *slab)
 {
 	int maxobj;
 
-	if (!folio_test_slab(slab_folio(slab))) {
-		slab_err(s, slab, "Not a valid slab page");
-		return 0;
-	}
-
 	maxobj = order_objects(slab_order(slab), s->size);
 	if (slab->objects > maxobj) {
 		slab_err(s, slab, "objects %u > max %u",
-- 
2.47.2