xfs: fix swapext ilock deadlock
xfs_swap_extents() holds the ilock over a call to filemap_write_and_wait(), which can then try to write data and take the ilock. That causes a self-deadlock. Fix the deadlock and clean up the code by separating the locking appropriately. Add a lockflags variable to track what locks we are holding as we gain and drop them and cleanup the error handling to always use "out_unlock" with the lockflags variable. Signed-off-by:Dave Chinner <dchinner@redhat.com> Reviewed-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Dave Chinner <david@fromorbit.com>
parent
b92cc59f
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