[dm-devel] [PATCH] dm-log: use struct_size() to calculate the size of struct

[Zhengyuan Liu]

As Gustavo said in other patches doing the same replace, we can now
use the new struct_size() helper to avoid leaving these open-coded and
prone to type mistake.

Signed-off-by: Zhengyuan Liu <liuzhengyuan at kylinos.cn>
---
 drivers/md/dm-log-writes.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/dm-log-writes.c b/drivers/md/dm-log-writes.c
index 9ea2b02..cda6363 100644
--- a/drivers/md/dm-log-writes.c
+++ b/drivers/md/dm-log-writes.c
@@ -680,7 +680,7 @@ static int log_writes_map(struct dm_target *ti, struct bio *bio)
 	if (discard_bio)
 		alloc_size = sizeof(struct pending_block);
 	else
-		alloc_size = sizeof(struct pending_block) + sizeof(struct bio_vec) * bio_segments(bio);
+		alloc_size = struct_size(block, vecs, bio_segments(bio));
 
 	block = kzalloc(alloc_size, GFP_NOIO);
 	if (!block) {
-- 
2.7.4


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