linux-kernel - [PATCH 2/2] mm: fix declarations of nr, delta and nr_pagecache

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Message-ID: <20150927210425.GA20155@gmail.com>
Date:	Sun, 27 Sep 2015 21:04:25 +0000
From:	Alexandru Moise <00moses.alexander00@...il.com>
To:	akpm@...ux-foundation.org
Cc:	vdavydov@...allels.com, mhocko@...e.cz, hannes@...xchg.org,
	tj@...nel.org, vbabka@...e.cz, mgorman@...e.de, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] mm: fix declarations of nr, delta and
 nr_pagecache_reclaimable

The nr variable is meant to be returned by a function which is
declared as returning "unsigned long", so declare nr as such.

Lower down we should also declare delta and nr_pagecache_reclaimable
as being unsigned longs because they're used to store the values
returned by zone_page_state() and zone_unmapped_file_pages() which
also happen to return unsigned integers.

Signed-off-by: Alexandru Moise <00moses.alexander00@...il.com>
---
 mm/vmscan.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 7f63a93..41e254e 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -194,7 +194,7 @@ static bool sane_reclaim(struct scan_control *sc)
 
 static unsigned long zone_reclaimable_pages(struct zone *zone)
 {
-	int nr;
+	unsigned long nr;
 
 	nr = zone_page_state(zone, NR_ACTIVE_FILE) +
 	     zone_page_state(zone, NR_INACTIVE_FILE);
@@ -3698,8 +3698,8 @@ static inline unsigned long zone_unmapped_file_pages(struct zone *zone)
 /* Work out how many page cache pages we can reclaim in this reclaim_mode */
 static long zone_pagecache_reclaimable(struct zone *zone)
 {
-	long nr_pagecache_reclaimable;
-	long delta = 0;
+	unsigned long nr_pagecache_reclaimable;
+	unsigned long delta = 0;
 
 	/*
 	 * If RECLAIM_UNMAP is set, then all file pages are considered
-- 
2.5.3

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