linux-kernel - [PATCH] mm: do

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <52A03EE4.6030609@huawei.com>
Date:	Thu, 5 Dec 2013 16:52:52 +0800
From:	Jianguo Wu <wujianguo@...wei.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Johannes Weiner <hannes@...xchg.org>,
	Minchan Kim <minchan.kim@...il.com>, <linux-mm@...ck.org>,
	<linux-kernel@...r.kernel.org>, qiuxishi <qiuxishi@...wei.com>
Subject: [PATCH] mm: do_mincore() cleanup

Two cleanups:
1. remove redundant codes for hugetlb pages.
2. end = pmd_addr_end(addr, end) restricts [addr, end) within PMD_SIZE,
   this may increase do_mincore() calls, remove it.

Signed-off-by: Jianguo Wu <wujianguo@...wei.com>
---
 mm/mincore.c |    7 -------
 1 files changed, 0 insertions(+), 7 deletions(-)

diff --git a/mm/mincore.c b/mm/mincore.c
index da2be56..1016233 100644
--- a/mm/mincore.c
+++ b/mm/mincore.c
@@ -225,13 +225,6 @@ static long do_mincore(unsigned long addr, unsigned long pages, unsigned char *v
 
 	end = min(vma->vm_end, addr + (pages << PAGE_SHIFT));
 
-	if (is_vm_hugetlb_page(vma)) {
-		mincore_hugetlb_page_range(vma, addr, end, vec);
-		return (end - addr) >> PAGE_SHIFT;
-	}
-
-	end = pmd_addr_end(addr, end);
-
 	if (is_vm_hugetlb_page(vma))
 		mincore_hugetlb_page_range(vma, addr, end, vec);
 	else
-- 
1.7.1


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/