| commit | fae9c791703606636c1220e47f6690660042ce7f | |
| author | Li Zefan <lizf@cn.fujitsu.com> | |
| Thu, 22 Apr 2010 09:30:00 +0000 (22 17:30 +0800) | ||
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | |
| Tue, 4 May 2010 16:25:00 +0000 (4 09:25 -0700) | ||
| tree | c4d1bf20f4b73ee438ae2c3168b9b7ead1418215 | treesnapshot (tar.gz zip) |
| parent | 9a9686b634acc5cb6b7c601c171ae64af0318a24 | commitdiff |
cgroup: Fix an RCU warning in alloc_css_id()
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>
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>
| kernel/cgroup.c | diffblobblamehistory |