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authorChristoph Hellwig <hch@lst.de>2022-03-30 08:29:07 +0300
committerJens Axboe <axboe@kernel.dk>2022-04-18 15:54:09 +0300
commit9acf381f3e8f715175c29f4b6d722f6b6797d139 (patch)
tree9f0a39c15820a6772d4cd0b60f458010b5ac6c64 /block/partitions
parentdbdc1be32591af023db2812706f01e6cd2f42bfc (diff)
downloadlinux-9acf381f3e8f715175c29f4b6d722f6b6797d139.tar.xz
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 <hch@lst.de> Reviewed-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20220330052917.2566582-6-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/partitions')
-rw-r--r--block/partitions/core.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/block/partitions/core.c b/block/partitions/core.c
index 70dec1c78521..8a0ec929023b 100644
--- a/block/partitions/core.c
+++ b/block/partitions/core.c
@@ -478,7 +478,7 @@ int bdev_del_partition(struct gendisk *disk, int partno)
goto out_unlock;
ret = -EBUSY;
- if (part->bd_openers)
+ if (atomic_read(&part->bd_openers))
goto out_unlock;
delete_partition(part);