From: Josef Bacik <jbacik@fusionio.com>
Date: Fri, 31 May 2013 17:04:36 +0000 (-0400)
Subject: Btrfs: init relocate extent_io_tree with a mapping
X-Git-Tag: v3.10-rc6~9^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a9995eece39a0630ebbfc1ab38570bce6c8a8f5b;p=pandora-kernel.git

Btrfs: init relocate extent_io_tree with a mapping

Dave reported a NULL pointer deref.  This is caused because he thought he'd be
smart and add sanity checks to the extent_io bit operations, but he didn't
expect a tree to have a NULL mapping.  To fix this we just need to init the
relocation's processed_blocks with the btree_inode->i_mapping.  Thanks,

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