From 9acf381f3e8f715175c29f4b6d722f6b6797d139 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 30 Mar 2022 07:29:07 +0200 Subject: block: turn bdev->bd_openers into an atomic_t All manipulation of bd_openers is under disk->open_mutex and will remain so for the foreseeable future. But at least one place reads it without the lock (blkdev_get) and there are more to be added. So make sure the compiler does not do turn the increments and decrements into non-atomic sequences by using an atomic_t. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Link: https://lore.kernel.org/r/20220330052917.2566582-6-hch@lst.de Signed-off-by: Jens Axboe --- include/linux/blkdev.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux/blkdev.h') diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 436645bde13f..afad3d1d0dac 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -188,7 +188,7 @@ static inline bool disk_live(struct gendisk *disk) */ static inline unsigned int disk_openers(struct gendisk *disk) { - return disk->part0->bd_openers; + return atomic_read(&disk->part0->bd_openers); } /* -- cgit v1.2.3-71-gd317