Messages in this thread Patch in this message | | | From | Witold Krecicki <> | Subject | [PATCH 2/6] cgroup: make 'cgroup_is_descendant' function take cgroup as a 'descendant of' argument | Date | Fri, 30 Sep 2011 13:36:21 +0200 |
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Make currently unused (previously used by cgroup_ns) 'cgroup_is_descendant' function take cgroup as a 'descendant of' argument instead of task.
Signed-off-by: Witold Krecicki <wpk@culm.net> --- include/linux/cgroup.h | 5 +++-- kernel/cgroup.c | 16 +++++++--------- 2 files changed, 10 insertions(+), 11 deletions(-)
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index ee51f79..6965591 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -440,8 +440,9 @@ int cgroup_path(const struct cgroup *cgrp, char *buf, int buflen); int cgroup_task_count(const struct cgroup *cgrp); -/* Return true if cgrp is a descendant of the task's cgroup */ -int cgroup_is_descendant(const struct cgroup *cgrp, struct task_struct *task); +/* Return true if cgrp is a descendant of the topcgrp */ +int cgroup_is_descendant(const struct cgroup *cgrp, + const struct cgroup *topcgrp); /* * When the subsys has to access css and may add permanent refcnt to css, diff --git a/kernel/cgroup.c b/kernel/cgroup.c index a4d002c..0177472 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -4684,30 +4684,28 @@ void cgroup_exit(struct task_struct *tsk, int run_callbacks) } /** - * cgroup_is_descendant - see if @cgrp is a descendant of @task's cgrp + * cgroup_is_descendant - see if @cgrp is a descendant of @topcgrp * @cgrp: the cgroup in question - * @task: the task in question + * @topcgrp: the top cgroup * - * See if @cgrp is a descendant of @task's cgroup in the appropriate + * See if @cgrp is a descendant of @topcgrp in the appropriate * hierarchy. * * If we are sending in dummytop, then presumably we are creating * the top cgroup in the subsystem. * - * Called only by the ns (nsproxy) cgroup. */ -int cgroup_is_descendant(const struct cgroup *cgrp, struct task_struct *task) +int cgroup_is_descendant(const struct cgroup *cgrp, + const struct cgroup *topcgrp) { int ret; - struct cgroup *target; if (cgrp == dummytop) return 1; - target = task_cgroup_from_root(task, cgrp->root); - while (cgrp != target && cgrp!= cgrp->top_cgroup) + while (cgrp != topcgrp && cgrp != cgrp->top_cgroup) cgrp = cgrp->parent; - ret = (cgrp == target); + ret = (cgrp == topcgrp); return ret; } -- 1.7.4.1
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