[PATCHv4 4/9] block: introduce bdev_dma_alignment helper

Keith Busch
2022-05-26T01:08:48Z

From: Keith Busch <kbusch@kernel.org>

Preparing for upcoming dma_alignment users that have a block_device, but
don't need the request_queue.

Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
include/linux/blkdev.h | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 5bdf2ac9142c..834b981ef01b 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1365,6 +1365,11 @@ static inline int queue_dma_alignment(const struct request_queue *q)
return q ? q->dma_alignment : 511;
}

+static inline unsigned int bdev_dma_alignment(struct block_device *bdev)
+{
+ return queue_dma_alignment(bdev_get_queue(bdev));
+}
+
static inline int blk_rq_aligned(struct request_queue *q, unsigned long addr,
unsigned int len)
{
--
2.30.2