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authorChristoph Hellwig <hch@lst.de>2021-10-19 15:44:03 +0200
committerMike Snitzer <snitzer@redhat.com>2021-11-01 13:28:45 -0400
commitc12d205dae09da9623c6a4c35a9b17088a9b9a71 (patch)
tree822c392a96c2b2d209f2173c2d9e917ad6e871e3 /drivers/md
parent089975379d52e7b99f2baf76e0d45bf2176be2bf (diff)
dm integrity: use bvec_kmap_local in integrity_metadata
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> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm-integrity.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index dd78baf4c7af..d8180d2a4284 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -1770,7 +1770,7 @@ static void integrity_metadata(struct work_struct *w)
char *mem, *checksums_ptr;
again:
- mem = (char *)kmap_atomic(bv.bv_page) + bv.bv_offset;
+ mem = bvec_kmap_local(&bv);
pos = 0;
checksums_ptr = checksums;
do {
@@ -1780,7 +1780,7 @@ again:
pos += ic->sectors_per_block << SECTOR_SHIFT;
sector += ic->sectors_per_block;
} while (pos < bv.bv_len && sectors_to_process && checksums != checksums_onstack);
- kunmap_atomic(mem);
+ kunmap_local(mem);
r = dm_integrity_rw_tag(ic, checksums, &dio->metadata_block, &dio->metadata_offset,
checksums_ptr - checksums, dio->op == REQ_OP_READ ? TAG_CMP : TAG_WRITE);