From 0f1b92cbdd0309afae0af1963e8cccddb3d2eaff Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Mon, 30 Jan 2017 18:06:11 +0300 Subject: introduce the walk_process_tree() helper Add the new helper to walk the process tree, the next patch adds a user. Note that it visits the group leaders only, proc_visitor can do for_each_thread itself or we can trivially extend walk_process_tree() to do this. Signed-off-by: Oleg Nesterov Signed-off-by: Pavel Tikhomirov Signed-off-by: Eric W. Biederman --- include/linux/sched.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/sched.h b/include/linux/sched.h index d2334229167f..6261bfc12853 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -3053,6 +3053,9 @@ extern bool current_is_single_threaded(void); #define for_each_process_thread(p, t) \ for_each_process(p) for_each_thread(p, t) +typedef int (*proc_visitor)(struct task_struct *p, void *data); +void walk_process_tree(struct task_struct *top, proc_visitor, void *); + static inline int get_nr_threads(struct task_struct *tsk) { return tsk->signal->nr_threads; -- cgit v1.2.3