Commit 1008162b authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
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block: add a queue_has_disk helper 



Add a helper to check if a gendisk is associated with a request_queue.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarJan Kara <jack@suse.cz>
Reviewed-by: default avatarJohannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20210809141744.1203023-4-hch@lst.de


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 471aa704

include/linux/blkdev.h

+1 −0
Original line number Diff line number Diff line
@@ -664,6 +664,7 @@ extern void blk_clear_pm_only(struct request_queue *q); 
	dma_map_page_attrs(dev, (bv)->bv_page, (bv)->bv_offset, (bv)->bv_len, \

	(dir), (attrs))



#define queue_has_disk(q)	((q)->kobj.parent != NULL)

#define queue_to_disk(q)	(dev_to_disk(kobj_to_dev((q)->kobj.parent)))



static inline bool queue_is_mq(struct request_queue *q)