diff options
| author | Tejun Heo <tj@kernel.org> | 2013-08-13 11:01:55 -0400 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2013-08-13 11:01:55 -0400 |
| commit | 73e80ed8007fc48a6deeb295ba37159fad274bd2 (patch) | |
| tree | c4f430a223725038cb85be6ee0e13578d831c929 /include/linux/cgroup.h | |
| parent | 105347ba5da3e87facce2337c50cd5df93cc6bec (diff) | |
cgroup: add __rcu modifier to cgroup->subsys[]
For the planned unified hierarchy, each css (cgroup_subsys_state) will
be RCU protected so that it can be created and destroyed individually
while allowing RCU accesses. Previous changes ensured that all
cgroup->subsys[] accesses use the cgroup_css() accessor. This patch
adds __rcu modifier to cgroup->subsys[], add matching RCU dereference
in cgroup_css() and convert all assignments to either
rcu_assign_pointer() or RCU_INIT_POINTER().
This change prepares for the actual RCUfication of css's and doesn't
introduce any visible behavior change. The conversion is verified
with sparse and all accesses are properly RCU annotated.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
Diffstat (limited to 'include/linux/cgroup.h')
| -rw-r--r-- | include/linux/cgroup.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index 8a5dc91fbaad..eb200b5794e7 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -204,7 +204,7 @@ struct cgroup { struct cgroup_name __rcu *name; /* Private pointers for each registered subsystem */ - struct cgroup_subsys_state *subsys[CGROUP_SUBSYS_COUNT]; + struct cgroup_subsys_state __rcu *subsys[CGROUP_SUBSYS_COUNT]; struct cgroupfs_root *root; |