[PATCHv3 3/6] block: introduce bdev_dma_alignment helper

From: Keith Busch <kbusch@fb.com>
To: <linux-fsdevel@vger.kernel.org>, <linux-block@vger.kernel.org>
Cc: <axboe@kernel.dk>, Kernel Team <Kernel-team@fb.com>, <hch@lst.de>,
	<bvanassche@acm.org>, <damien.lemoal@opensource.wdc.com>,
	<ebiggers@kernel.org>, Keith Busch <kbusch@kernel.org>
Subject: [PATCHv3 3/6] block: introduce bdev_dma_alignment helper
Date: Mon, 23 May 2022 14:01:16 -0700	[thread overview]
Message-ID: <20220523210119.2500150-4-kbusch@fb.com> (raw)
In-Reply-To: <20220523210119.2500150-1-kbusch@fb.com>

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>
---
 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

