linux-kernel - [PATCH 06/10] mm/util: Use offset_in

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Date:	Tue, 15 Sep 2015 20:08:11 +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 06/10] mm/util: 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/util.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/util.c b/mm/util.c
index 68ff8a5..9af1c12 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -309,7 +309,7 @@ unsigned long vm_mmap(struct file *file, unsigned long addr,
 {
 	if (unlikely(offset + PAGE_ALIGN(len) < offset))
 		return -EINVAL;
-	if (unlikely(offset & ~PAGE_MASK))
+	if (unlikely(offset_in_page(offset)))
 		return -EINVAL;
 
 	return vm_mmap_pgoff(file, addr, len, prot, flag, offset >> PAGE_SHIFT);
-- 
2.5.0

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