Commit 30495e68 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Mike Snitzer
Browse files

dm verity: use bvec_kmap_local in verity_for_bv_block 



Using local kmaps slightly reduces the chances to stray writes, and
the bvec interface cleans up the code a little bit.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
parent 27db2717

drivers/md/dm-verity-target.c

+3 −3
Original line number Diff line number Diff line
@@ -427,14 +427,14 @@ int verity_for_bv_block(struct dm_verity *v, struct dm_verity_io *io, 
		unsigned len;

		struct bio_vec bv = bio_iter_iovec(bio, *iter);



		page = kmap_atomic(bv.bv_page);

		page = bvec_kmap_local(&bv);

		len = bv.bv_len;



		if (likely(len >= todo))

			len = todo;



		r = process(v, io, page + bv.bv_offset, len);

		kunmap_atomic(page);

		r = process(v, io, page, len);

		kunmap_local(page);



		if (r < 0)

			return r;