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| author |   Tejun Heo <tj@kernel.org> | 2021-10-14 13:20:22 -1000 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2021-10-18 06:17:01 -0600 |
| commit | 3c08b0931eedd04c530040499fadeccab50ed646 (patch) | |
| tree | 8d204be36c3df0a58fdc58cb1c785f1f5812def5 /fs/btrfs/inode.c | |
| parent | Linux 5.15-rc6 (diff) | |
| download | linux-dev-3c08b0931eedd04c530040499fadeccab50ed646.tar.xz linux-dev-3c08b0931eedd04c530040499fadeccab50ed646.zip | |
blk-cgroup: blk_cgroup_bio_start() should use irq-safe operations on blkg->iostat_cpu
c3df5fb57fe8 ("cgroup: rstat: fix A-A deadlock on 32bit around
u64_stats_sync") made u64_stats updates irq-safe to avoid A-A deadlocks.
Unfortunately, the conversion missed one in blk_cgroup_bio_start(). Fix it.
Fixes: 2d146aa3aa84 ("mm: memcontrol: switch to rstat")
Cc: stable@vger.kernel.org # v5.13+
Reported-by: syzbot+9738c8815b375ce482a1@syzkaller.appspotmail.com
Signed-off-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/YWi7NrQdVlxD6J9W@slm.duckdns.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/btrfs/inode.c')
0 files changed, 0 insertions, 0 deletions