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Commit 808c43b7 authored by Andrey Ignatov's avatar Andrey Ignatov Committed by Tejun Heo
Browse files

cgroup: Simplify cgroup_ancestor 



Simplify cgroup_ancestor function. This is follow-up for
commit 77236281 ("bpf: Introduce bpf_skb_ancestor_cgroup_id helper")

Suggested-by: default avatarTejun Heo <tj@kernel.org>
Signed-off-by: default avatarAndrey Ignatov <rdna@fb.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 02214bfc

include/linux/cgroup.h

+3 −12
Original line number Diff line number Diff line
@@ -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;

}



/**