From: Christoph Hellwig <hch@lst.de>
Date: Mon, 9 Aug 2021 16:17:42 +0200
Subject: [PATCH] block: add a queue_has_disk helper
Git-commit: 1008162b2782a3624d12b0aee8da58bc75d12e19
Patch-mainline: v5.15-rc1
References: jsc#PED-1183
Add a helper to check if a gendisk is associated with a request_queue.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20210809141744.1203023-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Hannes Reinecke <hare@suse.com>
---
include/linux/blkdev.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index ac3642c88a4d..96f3d9617cd8 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -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)
--
2.35.3