diff options
| author |   Andrey Ignatov <rdna@fb.com> | 2018-09-21 17:03:27 -0700 |
|---|---|---|
| committer |   Tejun Heo <tj@kernel.org> | 2018-09-24 10:38:16 -0700 |
| commit | 808c43b7c7f70360ed7b9e43e2cf980f388e71fa (patch) | |
| tree | ac8a47eb5ec5c786815ddc4c46e7087bfe073ea6 | |
| parent | Merge tag 'media/v4.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media (diff) | |
| download | linux-dev-808c43b7c7f70360ed7b9e43e2cf980f388e71fa.tar.xz linux-dev-808c43b7c7f70360ed7b9e43e2cf980f388e71fa.zip | |
cgroup: Simplify cgroup_ancestor
Simplify cgroup_ancestor function. This is follow-up for
commit 7723628101aa ("bpf: Introduce bpf_skb_ancestor_cgroup_id helper")
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrey Ignatov <rdna@fb.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
| -rw-r--r-- | include/linux/cgroup.h | 15 |
1 files changed, 3 insertions, 12 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index 32c553556bbd..e03a92430383 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -567,20 +567,11 @@ static inline bool cgroup_is_descendant(struct cgroup *cgrp, static inline struct cgroup *cgroup_ancestor(struct cgroup *cgrp, int ancestor_level) { - struct cgroup *ptr; - if (cgrp->level < ancestor_level) return NULL; - - for (ptr = cgrp; - ptr && ptr->level > ancestor_level; - ptr = cgroup_parent(ptr)) - ; - - if (ptr && ptr->level == ancestor_level) - return ptr; - - return NULL; + while (cgrp && cgrp->level > ancestor_level) + cgrp = cgroup_parent(cgrp); + return cgrp; } /** |