xfs: only skip rmap owner checks for unknown-owner rmap removal

Source kernel commit: 68c58e9b9a88c1a9d0c2eaf6c7acefb00f5fbbfb

For rmap removal, refactor the rmap owner checks into a separate
function, then skip the checks if we are performing an unknown-owner

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
1 file changed