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Christoph Hellwigdjwong
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xfs: add support for sub-pagesize writeback without buffer_heads
Switch to using the iomap_page structure for checking sub-page uptodate status and track sub-page I/O completion status, and remove large quantities of boilerplate code working around buffer heads. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
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