cgroup: Fix an RCU warning in alloc_css_id()

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With CONFIG_PROVE_RCU=y, a warning can be triggered:

  # mount -t cgroup -o memory xxx /mnt
  # mkdir /mnt/0

...
kernel/cgroup.c:4442 invoked rcu_dereference_check() without protection!
...

This is a false-positive. It's safe to directly access parent_css->id.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

...

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Li Zefan 2010-04-22 17:30:00 +08:00 • committed by Paul E. McKenney

parent 9a9686b634

commit fae9c79170

1 changed files with 2 additions and 2 deletions

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kernel/cgroup.c

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