From: Andrew Morton <akpm@linux-foundation.org>

older gcc's are dumb:

fs/fs-writeback.c: In function 'writeback_single_inode':
fs/fs-writeback.c:334: warning: 'nr_to_write' may be used uninitialized in this function

Cc: Chris Mason <chris.mason@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Li Shaohua <shaohua.li@intel.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Michael Rubin <mrubin@google.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Richard Kennedy <richard@rsk.demon.co.uk>
Cc: Rik van Riel <riel@redhat.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
LKML-Reference: <201011180023.oAI0NXFl014362@imap1.linux-foundation.org>
---
 fs/fs-writeback.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- linux-next.orig/fs/fs-writeback.c	2010-12-08 22:44:26.000000000 +0800
+++ linux-next/fs/fs-writeback.c	2010-12-08 22:44:27.000000000 +0800
@@ -331,7 +331,7 @@ writeback_single_inode(struct inode *ino
 {
 	struct address_space *mapping = inode->i_mapping;
 	long per_file_limit = wbc->per_file_limit;
-	long nr_to_write;
+	long uninitialized_var(nr_to_write);
 	unsigned dirty;
 	int ret;
 


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