cgroup: Fix an RCU warning in cgroup_path()

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with CONFIG_PROVE_RCU=y, a warning can be triggered:

  # mount -t cgroup -o debug xxx /mnt
  # cat /proc/$$/cgroup

...
kernel/cgroup.c:1649 invoked rcu_dereference_check() without protection!
...

This is a false-positive, because cgroup_path() can be called
with either rcu_read_lock() held or cgroup_mutex held.

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 17:29:24 +08:00 • committed by Paul E. McKenney

parent e35ec2d2c1

commit 9a9686b634

1 changed files with 9 additions and 3 deletions

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kernel/cgroup.c

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