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authorAlex Elder <elder@inktank.com>2013-02-04 10:13:11 -0600
committerBen Myers <bpm@sgi.com>2013-02-07 09:39:48 -0600
commit311f08acde635e4e5ccea9b9d8c856cc2e0ced95 (patch)
tree8da8990b565b1d8c269ba20bf964d9115ac619cc /fs/xfs/xfs_iomap.c
parenta21cd503678286c56b1d0cca1c99349a4aa042f4 (diff)
xfs: memory barrier before wake_up_bit()
In xfs_ifunlock() there is a call to wake_up_bit() after clearing the flush lock on the xfs inode. This is not guaranteed to be safe, as noted in the comments above wake_up_bit() beginning with: In order for this to function properly, as it uses waitqueue_active() internally, some kind of memory barrier must be done prior to calling this. Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Dave Chinner <david@fromorbit.com> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_iomap.c')
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