From: Johannes Weiner <hannes@cmpxchg.org>
To: linux-mm@kvack.org
Cc: Matthew Wilcox <willy@infradead.org>,
Kent Overstreet <kent.overstreet@gmail.com>,
"Kirill A. Shutemov" <kirill@shutemov.name>,
Vlastimil Babka <vbabka@suse.cz>, Michal Hocko <mhocko@suse.com>,
Roman Gushchin <guro@fb.com>,
linux-kernel@vger.kernel.org, kernel-team@fb.com
Subject: [PATCH 10/11] PageSlab: eliminate unnecessary compound_head() call in mm/usercopy
Date: Tue, 12 Oct 2021 14:01:47 -0400 [thread overview]
Message-ID: <20211012180148.1669685-11-hannes@cmpxchg.org> (raw)
In-Reply-To: <20211012180148.1669685-1-hannes@cmpxchg.org>
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
---
mm/usercopy.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
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 {
--
2.32.0
next prev parent reply other threads:[~2021-10-12 18:02 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-12 18:01 [PATCH 00/11] PageSlab: eliminate unnecessary compound_head() calls Johannes Weiner
2021-10-12 18:01 ` [PATCH 01/11] PageSlab: bubble compound_head() into callsites Johannes Weiner
2021-10-12 18:01 ` [PATCH 02/11] PageSlab: eliminate unnecessary compound_head() calls in fs/proc/page Johannes Weiner
2021-10-12 18:01 ` [PATCH 03/11] PageSlab: eliminate unnecessary compound_head() calls in kernel/resource Johannes Weiner
2021-10-12 18:01 ` [PATCH 04/11] PageSlab: eliminate unnecessary compound_head() calls in mm/debug Johannes Weiner
2021-10-12 18:01 ` [PATCH 05/11] PageSlab: eliminate unnecessary compound_head() calls in mm/kasan Johannes Weiner
2021-10-12 18:01 ` [PATCH 06/11] PageSlab: eliminate unnecessary compound_head() call in mm/nommu Johannes Weiner
2021-10-12 18:01 ` [PATCH 07/11] PageSlab: eliminate unnecessary compound_head() call in mm/slab Johannes Weiner
2021-10-12 18:01 ` [PATCH 08/11] PageSlab: eliminate unnecessary compound_head() calls in mm/slab_common Johannes Weiner
2021-10-12 18:01 ` [PATCH 09/11] PageSlab: eliminate unnecessary compound_head() calls in mm/slub Johannes Weiner
2021-10-12 18:01 ` Johannes Weiner [this message]
2021-10-12 18:01 ` [PATCH 11/11] PageSlab: eliminate unnecessary compound_head() calls in mm/memcontrol Johannes Weiner
2021-10-12 19:23 ` [PATCH 00/11] PageSlab: eliminate unnecessary compound_head() calls Matthew Wilcox
2021-10-12 20:30 ` Johannes Weiner
2021-10-13 3:19 ` Matthew Wilcox
2021-10-13 13:49 ` Johannes Weiner
2021-10-13 17:55 ` Matthew Wilcox
2021-10-13 19:32 ` Johannes Weiner
2021-10-13 19:57 ` Johannes Weiner
2021-10-14 7:35 ` David Hildenbrand
2021-10-25 13:49 ` Vlastimil Babka
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