Commit 36d25489 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
Browse files

block: add a bdev_stable_writes helper 



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: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: default avatarChaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20220415045258.199825-15-hch@lst.de


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent a557e82e

drivers/md/dm-table.c

+1 −3
Original line number Diff line number Diff line
@@ -1950,9 +1950,7 @@ static int device_requires_stable_pages(struct dm_target *ti, 
					struct dm_dev *dev, sector_t start,

					sector_t len, void *data)

{

	struct request_queue *q = bdev_get_queue(dev->bdev);



	return blk_queue_stable_writes(q);

	return bdev_stable_writes(dev->bdev);

}



int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,

fs/super.c

+1 −1
Original line number Diff line number Diff line
@@ -1204,7 +1204,7 @@ static int set_bdev_super(struct super_block *s, void *data) 
	s->s_dev = s->s_bdev->bd_dev;

	s->s_bdi = bdi_get(s->s_bdev->bd_disk->bdi);



	if (blk_queue_stable_writes(s->s_bdev->bd_disk->queue))

	if (bdev_stable_writes(s->s_bdev))

		s->s_iflags |= SB_I_STABLE_WRITES;

	return 0;

}

include/linux/blkdev.h

+6 −0
Original line number Diff line number Diff line
@@ -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);

mm/swapfile.c

+1 −1
Original line number Diff line number Diff line
@@ -3065,7 +3065,7 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags) 
		goto bad_swap_unlock_inode;

	}



	if (p->bdev && blk_queue_stable_writes(p->bdev->bd_disk->queue))

	if (p->bdev && bdev_stable_writes(p->bdev))

		p->flags |= SWP_STABLE_WRITES;



	if (p->bdev && p->bdev->bd_disk->fops->rw_page)