[PATCH 16/16] block: use bvec_kmap_local in bio_integrity_process
From: Christoph Hellwig <hch@lst.de>
Date: 2021-06-08 16:09:14
Also in:
ceph-devel, dm-devel, linux-block, linux-mips, lkml
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
Using local kmaps slightly reduces the chances to stray writes, and the bvec interface cleans up the code a little bit. Signed-off-by: Christoph Hellwig <hch@lst.de> --- block/bio-integrity.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-)
diff --git a/block/bio-integrity.c b/block/bio-integrity.c
index 4b4eb8964a6f..8f54d49dc500 100644
--- a/block/bio-integrity.c
+++ b/block/bio-integrity.c@@ -172,18 +172,16 @@ static blk_status_t bio_integrity_process(struct bio *bio, iter.prot_buf = prot_buf; __bio_for_each_segment(bv, bio, bviter, *proc_iter) { - void *kaddr = kmap_atomic(bv.bv_page); + void *kaddr = bvec_kmap_local(&bv); - iter.data_buf = kaddr + bv.bv_offset; + iter.data_buf = kaddr; iter.data_size = bv.bv_len; - ret = proc_fn(&iter); - if (ret) { - kunmap_atomic(kaddr); - return ret; - } + kunmap_local(kaddr); + + if (ret) + break; - kunmap_atomic(kaddr); } return ret; }
--
2.30.2