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| author | Ming Lei <ming.lei@redhat.com> | 2017-12-18 20:22:06 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-01-06 09:18:00 -0700 |
| commit | 7891f05cbf4944a5436491d66de2be7533089aea (patch) | |
| tree | d5451cbcc52554eeb545a148e0cd632ddec94438 | |
| parent | c45a8f2def865e0d75b45618aef2963e15725cc4 (diff) | |
| download | linux-7891f05cbf4944a5436491d66de2be7533089aea.tar.gz linux-7891f05cbf4944a5436491d66de2be7533089aea.tar.bz2 linux-7891f05cbf4944a5436491d66de2be7533089aea.zip | |
block: bounce: avoid direct access to bvec table
We will support multipage bvecs in the future, so change to iterator way
for getting bv_page of bvec from original bio.
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | block/bounce.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/block/bounce.c b/block/bounce.c index fceb1a96480b..0274c31d6c05 100644 --- a/block/bounce.c +++ b/block/bounce.c @@ -137,21 +137,20 @@ static void copy_to_high_bio_irq(struct bio *to, struct bio *from) static void bounce_end_io(struct bio *bio, mempool_t *pool) { struct bio *bio_orig = bio->bi_private; - struct bio_vec *bvec, *org_vec; + struct bio_vec *bvec, orig_vec; int i; - int start = bio_orig->bi_iter.bi_idx; + struct bvec_iter orig_iter = bio_orig->bi_iter; /* * free up bounce indirect pages used */ bio_for_each_segment_all(bvec, bio, i) { - org_vec = bio_orig->bi_io_vec + i + start; - - if (bvec->bv_page == org_vec->bv_page) - continue; - - dec_zone_page_state(bvec->bv_page, NR_BOUNCE); - mempool_free(bvec->bv_page, pool); + orig_vec = bio_iter_iovec(bio_orig, orig_iter); + if (bvec->bv_page != orig_vec.bv_page) { + dec_zone_page_state(bvec->bv_page, NR_BOUNCE); + mempool_free(bvec->bv_page, pool); + } + bio_advance_iter(bio_orig, &orig_iter, orig_vec.bv_len); } bio_orig->bi_status = bio->bi_status; |