From: Kamal Dasu <kdasu.kdev@gmail.com>
Date: Thu, 23 Feb 2012 00:41:39 +0000 (+0000)
Subject: xfs: fix deadlock in xfs_rtfree_extent
X-Git-Tag: v3.4-rc1~55^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5575acc7807595687288b3bbac15103f2a5462e1;p=pandora-kernel.git

xfs: fix deadlock in xfs_rtfree_extent

To fix the deadlock caused by repeatedly calling xfs_rtfree_extent

 - removed xfs_ilock() and xfs_trans_ijoin() from xfs_rtfree_extent(),
   instead added asserts that the inode is locked and has an inode_item
   attached to it.
 - in xfs_bunmapi() when dealing with an inode with the rt flag
   call xfs_ilock() and xfs_trans_ijoin() so that the
   reference count is bumped on the inode and attached it to the
   transaction before calling into xfs_bmap_del_extent, similar to
   what we do in xfs_bmap_rtalloc.

Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Reviewed-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Ben Myers <bpm@sgi.com>
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