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| author |   Ming Lei <ming.lei@redhat.com> | 2017-12-18 20:22:07 +0800 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2018-01-06 09:18:00 -0700 |
| commit | 3c892a098b0bfa3e571f1f0d2a7e72fbaeea691a (patch) | |
| tree | 93a2f8c318cf22449587d8c3e9a1df6d52a4cc10 /include/linux/bvec.h | |
| parent | block: bounce: avoid direct access to bvec table (diff) | |
| download | linux-dev-3c892a098b0bfa3e571f1f0d2a7e72fbaeea691a.tar.xz linux-dev-3c892a098b0bfa3e571f1f0d2a7e72fbaeea691a.zip | |
block: bounce: don't access bio->bi_io_vec in copy_to_high_bio_irq
Firstly this patch introduces BVEC_ITER_ALL_INIT for iterating one bio
from start to end.
As we need to support multipage bvecs, don't access bio->bi_io_vec
in copy_to_high_bio_irq(), and just use the standard iterator for that.
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/bvec.h')
| -rw-r--r-- | include/linux/bvec.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/bvec.h b/include/linux/bvec.h index ec8a4d7af6bd..fe7a22dd133b 100644 --- a/include/linux/bvec.h +++ b/include/linux/bvec.h @@ -125,4 +125,13 @@ static inline bool bvec_iter_rewind(const struct bio_vec *bv, ((bvl = bvec_iter_bvec((bio_vec), (iter))), 1); \ bvec_iter_advance((bio_vec), &(iter), (bvl).bv_len)) +/* for iterating one bio from start to end */ +#define BVEC_ITER_ALL_INIT (struct bvec_iter) \ +{ \ + .bi_sector = 0, \ + .bi_size = UINT_MAX, \ + .bi_idx = 0, \ + .bi_bvec_done = 0, \ +} + #endif /* __LINUX_BVEC_ITER_H */ |