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author | Liu Bo <bo.li.liu@oracle.com> | 2017-05-15 15:33:27 -0700 |
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committer | David Sterba <dsterba@suse.com> | 2017-06-19 18:25:59 +0200 |
commit | 17347cec15f919901c90cdbf98af47ed2ed28b9f (patch) | |
tree | 27fa6d42856840f59bf9cc1cb042ee234a355cf1 /drivers/media/Kconfig | |
parent | 725130bac5857ac035cf9f47d2973ee4e734db54 (diff) | |
download | linux-17347cec15f919901c90cdbf98af47ed2ed28b9f.tar.gz |
Btrfs: change how we iterate bios in endio
Since dio submit has used bio_clone_fast, the submitted bio may not have a
reliable bi_vcnt, for the bio vector iterations in checksum related
functions, bio->bi_iter is not modified yet and it's safe to use
bio_for_each_segment, while for those bio vector iterations in dio read's
endio, we now save a copy of bvec_iter in struct btrfs_io_bio when cloning
bios and use the helper __bio_for_each_segment with the saved bvec_iter to
access each bvec.
Also for dio reads which don't get split, we also need to save a copy of
bio iterator in btrfs_bio_clone to let __bio_for_each_segments to access
each bvec in dio read's endio. Note that it doesn't affect other calls of
btrfs_bio_clone() because they don't need to use this iterator.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'drivers/media/Kconfig')
0 files changed, 0 insertions, 0 deletions