Merge branch 'for-linus' of git://oss.sgi.com:8090/xfs/xfs-2.6

Merge branch 'for-linus' of git://oss.sgi.com:8090/xfs/xfs-2.6

* 'for-linus' of git://oss.sgi.com:8090/xfs/xfs-2.6:
  [XFS] Fix xfs_ichgtime()s broken usage of I_SYNC
  [XFS] Make xfsbufd threads freezable
  [XFS] revert to double-buffering readdir
  [XFS] Fix broken inode cluster setup.
  [XFS] Clear XBF_READ_AHEAD flag on I/O completion.
  [XFS] Fixed a few bugs in xfs_buf_associate_memory()
  [XFS] 971064 Various fixups for xfs_bulkstat().
  [XFS] Fix dbflush panic in xfs_qm_sync.