From bb9d97b6dffa10cec5e1ce9adbce60f3c2b5eabc Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Mon, 12 Dec 2011 18:12:21 -0800 Subject: cgroup: don't use subsys->can_attach_task() or ->attach_task() Now that subsys->can_attach() and attach() take @tset instead of @task, they can handle per-task operations. Convert ->can_attach_task() and ->attach_task() users to use ->can_attach() and attach() instead. Most converions are straight-forward. Noteworthy changes are, * In cgroup_freezer, remove unnecessary NULL assignments to unused methods. It's useless and very prone to get out of sync, which already happened. * In cpuset, PF_THREAD_BOUND test is checked for each task. This doesn't make any practical difference but is conceptually cleaner. Signed-off-by: Tejun Heo Reviewed-by: KAMEZAWA Hiroyuki Reviewed-by: Frederic Weisbecker Acked-by: Li Zefan Cc: Paul Menage Cc: Balbir Singh Cc: Daisuke Nishimura Cc: James Morris Cc: Ingo Molnar Cc: Peter Zijlstra --- kernel/events/core.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) (limited to 'kernel/events/core.c') diff --git a/kernel/events/core.c b/kernel/events/core.c index 0e8457da6f95..3b8e0edbe693 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -7044,10 +7044,13 @@ static int __perf_cgroup_move(void *info) return 0; } -static void -perf_cgroup_attach_task(struct cgroup *cgrp, struct task_struct *task) +static void perf_cgroup_attach(struct cgroup_subsys *ss, struct cgroup *cgrp, + struct cgroup_taskset *tset) { - task_function_call(task, __perf_cgroup_move, task); + struct task_struct *task; + + cgroup_taskset_for_each(task, cgrp, tset) + task_function_call(task, __perf_cgroup_move, task); } static void perf_cgroup_exit(struct cgroup_subsys *ss, struct cgroup *cgrp, @@ -7061,7 +7064,7 @@ static void perf_cgroup_exit(struct cgroup_subsys *ss, struct cgroup *cgrp, if (!(task->flags & PF_EXITING)) return; - perf_cgroup_attach_task(cgrp, task); + task_function_call(task, __perf_cgroup_move, task); } struct cgroup_subsys perf_subsys = { @@ -7070,6 +7073,6 @@ struct cgroup_subsys perf_subsys = { .create = perf_cgroup_create, .destroy = perf_cgroup_destroy, .exit = perf_cgroup_exit, - .attach_task = perf_cgroup_attach_task, + .attach = perf_cgroup_attach, }; #endif /* CONFIG_CGROUP_PERF */ -- cgit v1.2.3