From e7b2dcc52b0e2d598a469f01cc460ccdde6869f2 Mon Sep 17 00:00:00 2001 From: Li Zefan Date: Tue, 12 Mar 2013 15:35:58 -0700 Subject: cgroup: remove cgroup_is_descendant() It was used by ns cgroup, and ns cgroup was removed long ago. Signed-off-by: Li Zefan Signed-off-by: Tejun Heo --- kernel/cgroup.c | 28 ---------------------------- 1 file changed, 28 deletions(-) (limited to 'kernel/cgroup.c') diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 7a6c4c72ca55..f51443fd5f71 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -5035,34 +5035,6 @@ void cgroup_exit(struct task_struct *tsk, int run_callbacks) put_css_set_taskexit(cg); } -/** - * cgroup_is_descendant - see if @cgrp is a descendant of @task's cgrp - * @cgrp: the cgroup in question - * @task: the task in question - * - * See if @cgrp is a descendant of @task's cgroup 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 ret; - struct cgroup *target; - - if (cgrp == dummytop) - return 1; - - target = task_cgroup_from_root(task, cgrp->root); - while (cgrp != target && cgrp!= cgrp->top_cgroup) - cgrp = cgrp->parent; - ret = (cgrp == target); - return ret; -} - static void check_for_release(struct cgroup *cgrp) { /* All of these checks rely on RCU to keep the cgroup -- cgit v1.2.3