diff options
| -rw-r--r-- | include/linux/cgroup.h | 24 | ||||
| -rw-r--r-- | kernel/cgroup.c | 20 |
2 files changed, 24 insertions, 20 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index 812fb2609838..82962c5a7475 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -388,6 +388,16 @@ static inline void css_put_many(struct cgroup_subsys_state *css, unsigned int n) percpu_ref_put_many(&css->refcnt, n); } +static inline void cgroup_get(struct cgroup *cgrp) +{ + css_get(&cgrp->self); +} + +static inline bool cgroup_tryget(struct cgroup *cgrp) +{ + return css_tryget(&cgrp->self); +} + static inline void cgroup_put(struct cgroup *cgrp) { css_put(&cgrp->self); @@ -506,6 +516,20 @@ static inline struct cgroup *task_cgroup(struct task_struct *task, return task_css(task, subsys_id)->cgroup; } +static inline struct cgroup *task_dfl_cgroup(struct task_struct *task) +{ + return task_css_set(task)->dfl_cgrp; +} + +static inline struct cgroup *cgroup_parent(struct cgroup *cgrp) +{ + struct cgroup_subsys_state *parent_css = cgrp->self.parent; + + if (parent_css) + return container_of(parent_css, struct cgroup, self); + return NULL; +} + /** * cgroup_is_descendant - test ancestry * @cgrp: the cgroup to be tested diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 4b9a259bd413..11353701f40d 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -358,15 +358,6 @@ static void cgroup_idr_remove(struct idr *idr, int id) spin_unlock_bh(&cgroup_idr_lock); } -static struct cgroup *cgroup_parent(struct cgroup *cgrp) -{ - struct cgroup_subsys_state *parent_css = cgrp->self.parent; - - if (parent_css) - return container_of(parent_css, struct cgroup, self); - return NULL; -} - /* subsystems visibly enabled on a cgroup */ static u16 cgroup_control(struct cgroup *cgrp) { @@ -484,17 +475,6 @@ static inline bool cgroup_is_dead(const struct cgroup *cgrp) return !(cgrp->self.flags & CSS_ONLINE); } -static void cgroup_get(struct cgroup *cgrp) -{ - WARN_ON_ONCE(cgroup_is_dead(cgrp)); - css_get(&cgrp->self); -} - -static bool cgroup_tryget(struct cgroup *cgrp) -{ - return css_tryget(&cgrp->self); -} - struct cgroup_subsys_state *of_css(struct kernfs_open_file *of) { struct cgroup *cgrp = of->kn->parent->priv; |