linux-kernel - linux-next: build warning in Linus' tree

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Date:	Thu, 19 Jan 2012 10:09:35 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Chris Mason <chris.mason@...cle.com>
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Jan Schmidt <list.btrfs@...-o-sch.net>,
	Arne Jansen <sensille@....net>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: linux-next: build warning in Linus' tree

Hi Linus,

Building Linus' tree, today's linux-next build (powerpc_ppc64_defconfig)
produced these warnings:

fs/btrfs/backref.c: In function 'find_parent_nodes':
fs/btrfs/backref.c:482:3: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
fs/btrfs/backref.c:395:6: note: 'ret' was declared here
fs/btrfs/backref.c:381:3: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
fs/btrfs/backref.c:300:6: note: 'ret' was declared here

and indeed, there is a path through to a BUG_ON(ret) that does not set
"ret".  Introduced by commit 8da6d5815c59 ("Btrfs: added
btrfs_find_all_roots()").

-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au

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