xfs: always use unwritten extents for direct I/O writes
To allow aio writes beyond i_size we need to create unwritten extents for newly allocated blocks, similar to how we already do inside i_size. Instead of adding another special case we now use unwritten extents unconditionally. This also marks the end of directly allocation data extents in all of XFS - we now always use either delalloc or unwritten extents. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
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