linux-kernel - [PATCH 06/11] PageSlab: eliminate unnecessary compound

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20211012180148.1669685-7-hannes@cmpxchg.org>
Date:   Tue, 12 Oct 2021 14:01:43 -0400
From:   Johannes Weiner <hannes@...xchg.org>
To:     linux-mm@...ck.org
Cc:     Matthew Wilcox <willy@...radead.org>,
        Kent Overstreet <kent.overstreet@...il.com>,
        "Kirill A. Shutemov" <kirill@...temov.name>,
        Vlastimil Babka <vbabka@...e.cz>,
        Michal Hocko <mhocko@...e.com>, Roman Gushchin <guro@...com>,
        linux-kernel@...r.kernel.org, kernel-team@...com
Subject: [PATCH 06/11] PageSlab: eliminate unnecessary compound_head() call in mm/nommu

The page comes from virt_to_head_page().

Signed-off-by: Johannes Weiner <hannes@...xchg.org>
---
 mm/nommu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/nommu.c b/mm/nommu.c
index c233126dd476..02d2427b8f9e 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -87,7 +87,7 @@ unsigned int kobjsize(const void *objp)
 	 * If the allocator sets PageSlab, we know the pointer came from
 	 * kmalloc().
 	 */
-	if (PageSlab(compound_head(page)))
+	if (PageSlab(page))
 		return ksize(objp);
 
 	/*
-- 
2.32.0