xfs: stop using generic_file_read_iter for direct I/O

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XFS already implement it's own flushing of the pagecache because it
implements proper synchronization for direct I/O reads.  This means
calling generic_file_read_iter for direct I/O is rather useless,
as it doesn't do much but updating the atime and iocb position for
us.  This also gets rid of the buffered I/O fallback that isn't used
for XFS.

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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Christoph Hellwig 2016-07-20 11:36:57 +10:00 • committed by Dave Chinner

parent bbc5a740c4

commit f1285ff0ac

1 changed files with 13 additions and 2 deletions

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fs/xfs/xfs_file.c

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