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| author | Hong Zhiguo <zhiguohong@tencent.com> | 2013-11-20 10:35:05 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2013-11-20 15:33:04 -0700 |
| commit | 2c575026fae6e63771bd2a4c1d407214a8096a89 (patch) | |
| tree | 4ab6ccbdf75b96229f176fc54e01580954e7a633 /fs/btrfs/extent_io.c | |
| parent | 82023bb7f75b0052f40d3e74169d191c3e4e6286 (diff) | |
| download | blackbird-op-linux-2c575026fae6e63771bd2a4c1d407214a8096a89.tar.gz blackbird-op-linux-2c575026fae6e63771bd2a4c1d407214a8096a89.zip | |
Update of blkg_stat and blkg_rwstat may happen in bh context.
While u64_stats_fetch_retry is only preempt_disable on 32bit
UP system. This is not enough to avoid preemption by bh and
may read strange 64 bit value.
Signed-off-by: Hong Zhiguo <zhiguohong@tencent.com>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: stable@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/btrfs/extent_io.c')
0 files changed, 0 insertions, 0 deletions
