iomap: Convert read_count to read_bytes_pending
Instead of counting bio segments, count the number of bytes submitted. This insulates us from the block layer's definition of what a 'same page' is, which is not necessarily clear once THPs are involved. Signed-off-by:Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by:
Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by:
Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by:
Christoph Hellwig <hch@lst.de>
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