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[XFS] Fix lock inversion in forced shutdown. 

Recent changes to xlog_state_release_iclog() placed the grant_lock inside
the icloglock. forced unmount of the log does this the opposite way
around, but does not depend on the order for correct working. Fix the
inversion by changing the order locks are gained in
xfs_log_force_umount().

SGI-PV: 979661
SGI-Modid: xfs-linux-melb:xfs-kern:30773a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
This commit is contained in:
David Chinner 2008-04-10 12:19:02 +10:00 committed by Lachlan McIlroy
parent 4679b2d36d
commit 6b1d1a732f
1 changed files with 1 additions and 1 deletions
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2
fs/xfs/xfs_log.c
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@ -3499,8 +3499,8 @@ xfs_log_force_umount(
* before we mark the filesystem SHUTDOWN and wake
* everybody up to tell the bad news.
*/
spin_lock(&log->l_grant_lock);
spin_lock(&log->l_icloglock);
spin_lock(&log->l_grant_lock);
mp->m_flags |= XFS_MOUNT_FS_SHUTDOWN;
XFS_BUF_DONE(mp->m_sb_bp);
/*