diff mbox series

[2/2] nvdimm-btt: use bvec_kmap_local in btt_rw_integrity

Message ID 20211018061244.1816503-3-hch@lst.de (mailing list archive)
State New, archived
Headers show
Series [1/2] nvdimm-blk: use bvec_kmap_local in nd_blk_rw_integrity | expand

Commit Message

Christoph Hellwig Oct. 18, 2021, 6:12 a.m. UTC 
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>
---
 drivers/nvdimm/btt.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/drivers/nvdimm/btt.c b/drivers/nvdimm/btt.c
index 92dec49522972..9c3871b713655 100644
--- a/drivers/nvdimm/btt.c
+++ b/drivers/nvdimm/btt.c
@@ -1164,17 +1164,15 @@  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;