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block: add a new helper bdev_{is_zone_start, offset_from_zone_start}

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Instead of open coding to check for zone start, add a helper to improve
readability and store the logic in one place.

Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Pankaj Raghav <p.raghav@samsung.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230110143635.77300-3-p.raghav@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pankaj Raghav
2023-01-10 15:36:34 +01:00
committed by Jens Axboe
parent fea127b36c
commit e29b210021
3 changed files with 15 additions and 3 deletions
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12
include/linux/blkdev.h
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@@ -1306,6 +1306,18 @@ static inline sector_t bdev_zone_sectors(struct block_device *bdev)
return q->limits.chunk_sectors;
}
static inline sector_t bdev_offset_from_zone_start(struct block_device *bdev,
sector_t sector)
{
return sector & (bdev_zone_sectors(bdev) - 1);
}
static inline bool bdev_is_zone_start(struct block_device *bdev,
sector_t sector)
{
return bdev_offset_from_zone_start(bdev, sector) == 0;
}
static inline int queue_dma_alignment(const struct request_queue *q)
{
return q ? q->limits.dma_alignment : 511;