linux-kernel - [PATCH] dm-verity: switch to bio_advance_iter

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Message-ID: <20260111202750.52992-1-ebiggers@kernel.org>
Date: Sun, 11 Jan 2026 12:27:49 -0800
From: Eric Biggers <ebiggers@...nel.org>
To: dm-devel@...ts.linux.dev,
	Alasdair Kergon <agk@...hat.com>,
	Mike Snitzer <snitzer@...nel.org>,
	Mikulas Patocka <mpatocka@...hat.com>,
	Benjamin Marzinski <bmarzins@...hat.com>
Cc: Sami Tolvanen <samitolvanen@...gle.com>,
	linux-kernel@...r.kernel.org,
	Eric Biggers <ebiggers@...nel.org>
Subject: [PATCH] dm-verity: switch to bio_advance_iter_single()

dm-verity doesn't support data blocks that span pages, and it sets
dma_alignment accordingly.  As such, instead of using
bio_advance_iter(), it can use the more lightweight function
bio_advance_iter_single() to get the same result.

Signed-off-by: Eric Biggers <ebiggers@...nel.org>
---
 drivers/md/dm-verity-target.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/dm-verity-target.c b/drivers/md/dm-verity-target.c
index 777a0ebe8536..4b86f7faffd0 100644
--- a/drivers/md/dm-verity-target.c
+++ b/drivers/md/dm-verity-target.c
@@ -526,11 +526,11 @@ static int verity_verify_io(struct dm_verity_io *io)
 		iter = &iter_copy;
 	} else
 		iter = &io->iter;
 
 	for (b = 0; b < io->n_blocks;
-	     b++, bio_advance_iter(bio, iter, block_size)) {
+	     b++, bio_advance_iter_single(bio, iter, block_size)) {
 		sector_t blkno = io->block + b;
 		struct pending_block *block;
 		bool is_zero;
 		struct bio_vec bv;
 		void *data;

base-commit: 8fbb8fe75d4cf92eaa7b21828ec39c1bf79a262f
-- 
2.52.0