diff options
Diffstat (limited to 'kernel/cgroup_freezer.c')
| -rw-r--r-- | kernel/cgroup_freezer.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/kernel/cgroup_freezer.c b/kernel/cgroup_freezer.c index 9d3f615..1db686e 100644 --- a/kernel/cgroup_freezer.c +++ b/kernel/cgroup_freezer.c @@ -45,16 +45,19 @@ struct freezer { spinlock_t lock; }; +static inline struct freezer *css_freezer(struct cgroup_subsys_state *css) +{ + return css ? container_of(css, struct freezer, css) : NULL; +} + static inline struct freezer *cgroup_freezer(struct cgroup *cgroup) { - return container_of(cgroup_css(cgroup, freezer_subsys_id), - struct freezer, css); + return css_freezer(cgroup_css(cgroup, freezer_subsys_id)); } static inline struct freezer *task_freezer(struct task_struct *task) { - return container_of(task_css(task, freezer_subsys_id), - struct freezer, css); + return css_freezer(task_css(task, freezer_subsys_id)); } static struct freezer *parent_freezer(struct freezer *freezer) |