commit b8b2d8253236331c3b26189f34e73f2af89ca982
author Xiubo Li <Li.Xiubo@freescale.com> Thu Oct 09 15:28:21 2014 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> Thu Oct 09 22:25:57 2014 -0400
tree b0fb8a7605f573f7811099f1ad9ee8c4b6f7863b
parent ff26f70f4323ffe332ab6a5b2550f687bbd15326

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,
                                     ^

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

diff --git a/mm/compaction.c b/mm/compaction.c
index 15163b4..b9972c0 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -344,7 +344,7 @@
 {
 	int nr_scanned = 0, total_isolated = 0;
 	struct page *cursor, *valid_page = NULL;
-	unsigned long flags;
+	unsigned long flags = 0;
 	bool locked = false;
 	unsigned long blockpfn = *start_pfn;
 
@@ -570,7 +570,7 @@
 	unsigned long nr_scanned = 0, nr_isolated = 0;
 	struct list_head *migratelist = &cc->migratepages;
 	struct lruvec *lruvec;
-	unsigned long flags;
+	unsigned long flags = 0;
 	bool locked = false;
 	struct page *page = NULL, *valid_page = NULL;