From: Christoph Hellwig Date: Thu, 3 Mar 2022 11:19:01 +0000 (+0300) Subject: nvdimm-btt: use bvec_kmap_local in btt_rw_integrity X-Git-Tag: for-5.18/drivers-2022-03-18~10 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=3205190655ea56ea5e00815eeff4dab2bde0af80;p=linux-2.6-block.git 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 Reviewed-by: Ira Weiny Link: https://lore.kernel.org/r/20220303111905.321089-7-hch@lst.de Signed-off-by: Jens Axboe --- 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;