diff options
Diffstat (limited to 'include/linux/cgroup.h')
| -rw-r--r-- | include/linux/cgroup.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index 27b0c9105da5..641e56494a92 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -113,6 +113,19 @@ static inline void css_get(struct cgroup_subsys_state *css) } /** + * css_get_many - obtain references on the specified css + * @css: target css + * @n: number of references to get + * + * The caller must already have a reference. + */ +static inline void css_get_many(struct cgroup_subsys_state *css, unsigned int n) +{ + if (!(css->flags & CSS_NO_REF)) + percpu_ref_get_many(&css->refcnt, n); +} + +/** * css_tryget - try to obtain a reference on the specified css * @css: target css * @@ -159,6 +172,19 @@ static inline void css_put(struct cgroup_subsys_state *css) percpu_ref_put(&css->refcnt); } +/** + * css_put_many - put css references + * @css: target css + * @n: number of references to put + * + * Put references obtained via css_get() and css_tryget_online(). + */ +static inline void css_put_many(struct cgroup_subsys_state *css, unsigned int n) +{ + if (!(css->flags & CSS_NO_REF)) + percpu_ref_put_many(&css->refcnt, n); +} + /* bits in struct cgroup flags field */ enum { /* Control Group requires release notifications to userspace */ |