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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: 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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4
drivers/md/dm-table.c
View File

@ -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,

2
fs/super.c
View File

@ -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;
}

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);

2
mm/swapfile.c
View File

@ -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)