diff options
| author | Christoph Hellwig <hch@lst.de> | 2022-03-30 08:29:07 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-04-18 15:54:09 +0300 |
| commit | 9acf381f3e8f715175c29f4b6d722f6b6797d139 (patch) | |
| tree | 9f0a39c15820a6772d4cd0b60f458010b5ac6c64 /block/partitions | |
| parent | dbdc1be32591af023db2812706f01e6cd2f42bfc (diff) | |
| download | linux-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.c | 2 |
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); |