From 305ba33deac4a7a56811b85e66f72ce3f265b4aa Mon Sep 17 00:00:00 2001
From: Xiubo Li <Li.Xiubo@freescale.com>
Date: Thu, 9 Oct 2014 15:28:21 -0700
Subject: [PATCH] mm/compaction.c: fix warning of 'flags' may be used
 uninitialized

C      mm/compaction.o
mm/compaction.c: In function isolate_freepages_block:
mm/compaction.c:364:37: warning: flags may be used uninitialized in this function [-Wmaybe-uninitialized]
       && compact_unlock_should_abort(&cc->zone->lock, flags,
                                     ^

Change-Id: Ief2dbda72ebb6b470d9b27fab990a0e9a1b4b588
Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@suse.de>
Cc: David Rientjes <rientjes@google.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/compaction.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/compaction.c b/mm/compaction.c
index 772f67f..46a48e1 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -247,7 +247,7 @@ static unsigned long isolate_freepages_block(struct compact_control *cc,
 {
 	int nr_scanned = 0, total_isolated = 0;
 	struct page *cursor, *valid_page = NULL;
-	unsigned long flags;
+	unsigned long flags = 0;
 	bool locked = false;

 	cursor = pfn_to_page(blockpfn);
@@ -455,7 +455,7 @@ isolate_migratepages_range(struct zone *zone, struct compact_control *cc,
 	unsigned long nr_scanned = 0, nr_isolated = 0;
 	struct list_head *migratelist = &cc->migratepages;
 	isolate_mode_t mode = 0;
-	unsigned long flags;
+	unsigned long flags = 0;
 	bool locked = false;
 	struct page *page = NULL, *valid_page = NULL;

--
2.6.2