linux-kernel - [PATCH 01/10] mm/msync: Use offset_in

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Message-Id: <1442326045-7147-1-git-send-email-kuleshovmail@gmail.com>
Date:	Tue, 15 Sep 2015 20:07:25 +0600
From:	Alexander Kuleshov <kuleshovmail@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Michal Hocko <mhocko@...e.com>,
	Johannes Weiner <hannes@...xchg.org>,
	David Rientjes <rientjes@...gle.com>,
	Vladimir Davydov <vdavydov@...allels.com>,
	Tejun Heo <tj@...nel.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Alexander Kuleshov <kuleshovmail@...il.com>
Subject: [PATCH 01/10] mm/msync: Use offset_in_page macro

The <linux/mm.h> provides offset_in_page() macro. Let's use already
predefined macro instead of (addr & ~PAGE_MASK).

Signed-off-by: Alexander Kuleshov <kuleshovmail@...il.com>
---
 mm/msync.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/msync.c b/mm/msync.c
index bb04d53..24e612f 100644
--- a/mm/msync.c
+++ b/mm/msync.c
@@ -38,7 +38,7 @@ SYSCALL_DEFINE3(msync, unsigned long, start, size_t, len, int, flags)
 
 	if (flags & ~(MS_ASYNC | MS_INVALIDATE | MS_SYNC))
 		goto out;
-	if (start & ~PAGE_MASK)
+	if (offset_in_page(start))
 		goto out;
 	if ((flags & MS_ASYNC) && (flags & MS_SYNC))
 		goto out;
-- 
2.5.0

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