diff options
| author | Christoph Hellwig <hch@lst.de> | 2021-04-12 16:46:58 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-04-12 18:19:58 +0300 |
| commit | 5f03414d4098b5718f1a5e99b43b9d9cb6f3612a (patch) | |
| tree | dfdeab389f11bb0f1080abc6445d6d1a6bebc3e5 /drivers/block | |
| parent | 6f822e1b5d9dda3d20e87365de138046e3baa03a (diff) | |
| download | linux-5f03414d4098b5718f1a5e99b43b9d9cb6f3612a.tar.xz | |
block: move bio_list_copy_data to pktcdvd
bio_list_copy_data is only used by pktcdvd, so move it there.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210412134658.2623190-2-hch@lst.de
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/pktcdvd.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c index fc4b0f1aa86d..bd3556585122 100644 --- a/drivers/block/pktcdvd.c +++ b/drivers/block/pktcdvd.c @@ -1199,6 +1199,42 @@ try_next_bio: return 1; } +/** + * bio_list_copy_data - copy contents of data buffers from one chain of bios to + * another + * @src: source bio list + * @dst: destination bio list + * + * Stops when it reaches the end of either the @src list or @dst list - that is, + * copies min(src->bi_size, dst->bi_size) bytes (or the equivalent for lists of + * bios). + */ +static void bio_list_copy_data(struct bio *dst, struct bio *src) +{ + struct bvec_iter src_iter = src->bi_iter; + struct bvec_iter dst_iter = dst->bi_iter; + + while (1) { + if (!src_iter.bi_size) { + src = src->bi_next; + if (!src) + break; + + src_iter = src->bi_iter; + } + + if (!dst_iter.bi_size) { + dst = dst->bi_next; + if (!dst) + break; + + dst_iter = dst->bi_iter; + } + + bio_copy_data_iter(dst, &dst_iter, src, &src_iter); + } +} + /* * Assemble a bio to write one packet and queue the bio for processing * by the underlying block device. |