diff mbox series

[10/11] PageSlab: eliminate unnecessary compound_head() call in mm/usercopy

Message ID 20211012180148.1669685-11-hannes@cmpxchg.org (mailing list archive)
State New
Headers show
Series PageSlab: eliminate unnecessary compound_head() calls | expand

Commit Message

Johannes Weiner Oct. 12, 2021, 6:01 p.m. UTC 
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
---
 mm/usercopy.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/mm/usercopy.c b/mm/usercopy.c
index 924e236522da..b3de3c4eefba 100644
--- a/mm/usercopy.c
+++ b/mm/usercopy.c
@@ -235,7 +235,7 @@  static inline void check_heap_object(const void *ptr, unsigned long n,
 	 */
 	page = compound_head(kmap_to_page((void *)ptr));
 
-	if (PageSlab(compound_head(page))) {
+	if (PageSlab(page)) {
 		/* Check slab allocator for flags and size. */
 		__check_heap_object(ptr, n, page, to_user);
 	} else {