From: Josef Bacik <jbacik@fusionio.com>
Date: Wed, 17 Apr 2013 16:16:59 +0000 (-0400)
Subject: Btrfs: fix lockdep warning
X-Git-Tag: v3.10-rc1~31^2~38
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=62dbd7176e196cd042c5542696981b268264fe92;p=pandora-kernel.git

Btrfs: fix lockdep warning

The locking order for stuff is

__sb_start_write
ordered_mutex

but with sync() we don't do __sb_start_write for some strange reason, which
means that our iput in wait_ordered_extents could start a transaction which does
the __sb_start_write while we're holding the ordered_mutex.  Fix this by using
delayed iput in sync.  Thanks,

Reported-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
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