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block: add a bdev_stable_writes helper

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Add a helper to check the stable writes flag based on the block_device
instead of having to poke into the block layer internal request_queue.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20220415045258.199825-15-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2022-04-15 06:52:45 +02:00 • committed by Jens Axboe
parent a557e82e5a
commit 36d254893a
4 changed files with 9 additions and 5 deletions
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6
include/linux/blkdev.h
View file

@ -1330,6 +1330,12 @@ static inline bool bdev_nonrot(struct block_device *bdev)
return blk_queue_nonrot(bdev_get_queue(bdev));
}
static inline bool bdev_stable_writes(struct block_device *bdev)
{
return test_bit(QUEUE_FLAG_STABLE_WRITES,
&bdev_get_queue(bdev)->queue_flags);
}
static inline bool bdev_write_cache(struct block_device *bdev)
{
return test_bit(QUEUE_FLAG_WC, &bdev_get_queue(bdev)->queue_flags);