nvdimm-blk: use bvec_kmap_local in nd_blk_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>

diff --git a/drivers/nvdimm/blk.c b/drivers/nvdimm/blk.c
index 7b9556291eb1d789269b300ddd2f8b7e42814cb6..4295a08ec893985f7d6859e7f6d3beb4177caa61 100644 (file)
--- a/drivers/nvdimm/blk.c
+++ b/drivers/nvdimm/blk.c
@@ -89,10 +89,9 @@ static int nd_blk_rw_integrity(struct nd_namespace_blk *nsblk,
                 */
 
                cur_len = min(len, bv.bv_len);
-               iobuf = kmap_atomic(bv.bv_page);
-               err = ndbr->do_io(ndbr, dev_offset, iobuf + bv.bv_offset,
-                               cur_len, rw);
-               kunmap_atomic(iobuf);
+               iobuf = bvec_kmap_local(&bv);
+               err = ndbr->do_io(ndbr, dev_offset, iobuf, cur_len, rw);
+               kunmap_local(iobuf);
                if (err)
                        return err;