| commit | 0341509fdfc9519f7de6aabc5dd23217cef72b73 | [log] [tgz] |
|---|---|---|
| author | Li Zefan <lizf@cn.fujitsu.com> | Fri May 07 08:57:00 2010 +0200 |
| committer | Jens Axboe <jens.axboe@oracle.com> | Fri May 07 08:57:00 2010 +0200 |
| tree | 84415f35129013b9d8fb3f5f0ef266437a02f09c | |
| parent | dcf097b247affd8b88ad410a92298590c5600f44 [diff] |
blk-cgroup: Fix an RCU warning in blkiocg_create() with CONFIG_PROVE_RCU=y, a warning can be triggered: # mount -t cgroup -o blkio xxx /mnt # mkdir /mnt/subgroup ... kernel/cgroup.c:4442 invoked rcu_dereference_check() without protection! ... To fix this, we avoid caling css_depth() here, which is a bit simpler than the original code. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Acked-by: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>