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authorHong Zhiguo <zhiguohong@tencent.com>2013-11-20 21:35:05 +0400
committerJens Axboe <axboe@kernel.dk>2013-11-21 02:33:04 +0400
commit2c575026fae6e63771bd2a4c1d407214a8096a89 (patch)
tree4ab6ccbdf75b96229f176fc54e01580954e7a633 /fs/btrfs/check-integrity.c
parent82023bb7f75b0052f40d3e74169d191c3e4e6286 (diff)
downloadlinux-2c575026fae6e63771bd2a4c1d407214a8096a89.tar.xz
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/check-integrity.c')
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