[XFS updates] XFS development tree branch, for-next, updated. v3.8-rc1-33-g311f08a

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  311f08a xfs: memory barrier before wake_up_bit()
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- Log -----------------------------------------------------------------
commit 311f08acde635e4e5ccea9b9d8c856cc2e0ced95
Author: Alex Elder <elder at inktank.com>
Date:   Mon Feb 4 10:13:11 2013 -0600

    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 at inktank.com>
    Reviewed-by: Dave Chinner <david at fromorbit.com>
    Signed-off-by: Ben Myers <bpm at sgi.com>

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Summary of changes:
 fs/xfs/xfs_inode.h | 1 +
 1 file changed, 1 insertion(+)


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