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block: introduce bdev_iter_is_aligned helper 

Provide a convenient function for this repeatable coding pattern.

Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220610195830.3574005-10-kbusch@fb.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Keith Busch 2022-06-10 12:58:28 -07:00 committed by Jens Axboe
parent cfa320f728
commit 5debd9691c
1 changed files with 7 additions and 0 deletions
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7
include/linux/blkdev.h
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@ -1370,6 +1370,13 @@ static inline unsigned int bdev_dma_alignment(struct block_device *bdev)
return queue_dma_alignment(bdev_get_queue(bdev));
}
static inline bool bdev_iter_is_aligned(struct block_device *bdev,
struct iov_iter *iter)
{
return iov_iter_is_aligned(iter, bdev_dma_alignment(bdev),
bdev_logical_block_size(bdev) - 1);
}
static inline int blk_rq_aligned(struct request_queue *q, unsigned long addr,
unsigned int len)
{