Commit 27db2717 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Mike Snitzer
Browse files

dm log writes: use memcpy_from_bvec in log_writes_map 



Use memcpy_from_bvec instead of open coding the logic.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
parent 25058d1c

drivers/md/dm-log-writes.c

+2 −4
Original line number Diff line number Diff line
@@ -753,7 +753,7 @@ static int log_writes_map(struct dm_target *ti, struct bio *bio) 
	 */

	bio_for_each_segment(bv, bio, iter) {

		struct page *page;

		void *src, *dst;

		void *dst;



		page = alloc_page(GFP_NOIO);

		if (!page) {
@@ -765,11 +765,9 @@ static int log_writes_map(struct dm_target *ti, struct bio *bio) 
			return DM_MAPIO_KILL;

		}



		src = kmap_atomic(bv.bv_page);

		dst = kmap_atomic(page);

		memcpy(dst, src + bv.bv_offset, bv.bv_len);

		memcpy_from_bvec(dst, &bv);

		kunmap_atomic(dst);

		kunmap_atomic(src);

		block->vecs[i].bv_page = page;

		block->vecs[i].bv_len = bv.bv_len;

		block->vec_cnt++;