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authorChristoph Hellwig <hch@lst.de>2022-03-03 14:19:01 +0300
committerJens Axboe <axboe@kernel.dk>2022-03-04 22:29:21 +0300
commit3205190655ea56ea5e00815eeff4dab2bde0af80 (patch)
treebf26c63ea924934c9eca15eb749017435553ff85 /drivers/nvdimm
parent20072ec828640b7d23a0cfdbccf0dea48e77ba3e (diff)
downloadlinux-3205190655ea56ea5e00815eeff4dab2bde0af80.tar.xz
nvdimm-btt: use bvec_kmap_local in btt_rw_integrity
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> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Link: https://lore.kernel.org/r/20220303111905.321089-7-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/nvdimm')
-rw-r--r--drivers/nvdimm/btt.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/nvdimm/btt.c b/drivers/nvdimm/btt.c
index cbd994f7f1fe..9613e54c7a67 100644
--- a/drivers/nvdimm/btt.c
+++ b/drivers/nvdimm/btt.c
@@ -1163,17 +1163,15 @@ static int btt_rw_integrity(struct btt *btt, struct bio_integrity_payload *bip,
*/
cur_len = min(len, bv.bv_len);
- mem = kmap_atomic(bv.bv_page);
+ mem = bvec_kmap_local(&bv);
if (rw)
- ret = arena_write_bytes(arena, meta_nsoff,
- mem + bv.bv_offset, cur_len,
+ ret = arena_write_bytes(arena, meta_nsoff, mem, cur_len,
NVDIMM_IO_ATOMIC);
else
- ret = arena_read_bytes(arena, meta_nsoff,
- mem + bv.bv_offset, cur_len,
+ ret = arena_read_bytes(arena, meta_nsoff, mem, cur_len,
NVDIMM_IO_ATOMIC);
- kunmap_atomic(mem);
+ kunmap_local(mem);
if (ret)
return ret;