[PATCHv6 04/11] block: introduce bdev_dma_alignment helper

[Keith Busch]

From: Keith Busch <kbusch at 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 at kernel.org>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn at wdc.com>
Reviewed-by: Christoph Hellwig <hch at 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 608d577734c2..ab7e6aa17954 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1366,6 +1366,11 @@ 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