diff options
| author | Tejun Heo <tj@kernel.org> | 2017-08-11 05:49:01 -0700 |
|---|---|---|
| committer | Michael Bestas <mkbestas@lineageos.org> | 2022-04-19 00:51:36 +0300 |
| commit | 483cbe97b0e4112d1e48df80de2e6a2c8a650b15 (patch) | |
| tree | ece584721019858f8b35705b4beb05d2a460ad88 /include/linux/cgroup.h | |
| parent | 01974b4687bb2dcac6b1315e63875ec1ca07fe5e (diff) | |
BACKPORT: cgroup: misc changes
Misc trivial changes to prepare for future changes. No functional
difference.
* Expose cgroup_get(), cgroup_tryget() and cgroup_parent().
* Implement task_dfl_cgroup() which dereferences css_set->dfl_cgrp.
* Rename cgroup_stats_show() to cgroup_stat_show() for consistency
with the file name.
Signed-off-by: Tejun Heo <tj@kernel.org>
(cherry picked from commit 3e48930cc74f0c212ee1838f89ad0ca7fcf2fea1)
Conflicts:
kernel/cgroup/cgroup.c
(1. manual merge because kernel/cgroup/cgroup.c is under kernel/cgroup.c
2. cgroup_stats_show change is skipped because the function dos not exist)
Bug: 111308141
Test: modified lmkd to use PSI and tested using lmkd_unit_test
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Change-Id: I756ee3dcf0d0f3da69cd1b58e644271625053538
Signed-off-by: Chatur27 <jasonbright2709@gmail.com>
Diffstat (limited to 'include/linux/cgroup.h')
| -rw-r--r-- | include/linux/cgroup.h | 24 |
1 files changed, 24 insertions, 0 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 |