diff options
| author | Christoph Hellwig <hch@lst.de> | 2021-07-27 08:56:41 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-08-02 22:37:27 +0300 |
| commit | f8b679a070c536600c64a78c83b96aa617f8fa71 (patch) | |
| tree | 63a8c7b1779525fab68c72376d9aebf2253eb472 /block/bio.c | |
| parent | bda135d9c03fae64c910a8c8d751eccd8408f400 (diff) | |
| download | linux-f8b679a070c536600c64a78c83b96aa617f8fa71.tar.xz | |
block: rewrite bio_copy_data_iter to use bvec_kmap_local and memcpy_to_bvec
Use the proper helpers instead of open coding the copy.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20210727055646.118787-11-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bio.c')
| -rw-r--r-- | block/bio.c | 28 |
1 files changed, 8 insertions, 20 deletions
diff --git a/block/bio.c b/block/bio.c index 2e436bccb1e2..0c89fa2f7a85 100644 --- a/block/bio.c +++ b/block/bio.c @@ -1186,27 +1186,15 @@ EXPORT_SYMBOL(bio_advance); void bio_copy_data_iter(struct bio *dst, struct bvec_iter *dst_iter, struct bio *src, struct bvec_iter *src_iter) { - struct bio_vec src_bv, dst_bv; - void *src_p, *dst_p; - unsigned bytes; - while (src_iter->bi_size && dst_iter->bi_size) { - src_bv = bio_iter_iovec(src, *src_iter); - dst_bv = bio_iter_iovec(dst, *dst_iter); - - bytes = min(src_bv.bv_len, dst_bv.bv_len); - - src_p = kmap_atomic(src_bv.bv_page); - dst_p = kmap_atomic(dst_bv.bv_page); - - memcpy(dst_p + dst_bv.bv_offset, - src_p + src_bv.bv_offset, - bytes); - - kunmap_atomic(dst_p); - kunmap_atomic(src_p); - - flush_dcache_page(dst_bv.bv_page); + struct bio_vec src_bv = bio_iter_iovec(src, *src_iter); + struct bio_vec dst_bv = bio_iter_iovec(dst, *dst_iter); + unsigned int bytes = min(src_bv.bv_len, dst_bv.bv_len); + void *src_buf; + + src_buf = bvec_kmap_local(&src_bv); + memcpy_to_bvec(&dst_bv, src_buf); + kunmap_local(src_buf); bio_advance_iter_single(src, src_iter, bytes); bio_advance_iter_single(dst, dst_iter, bytes); |