cgroups: add 'data' field to struct cgroup_scanner

We need to pass some data to test_task() or process_task() in some cases.
Will be used later.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 43763bd..4316a54 100644 (file)
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -337,6 +337,7 @@ struct cgroup_scanner {
        void (*process_task)(struct task_struct *p,
                        struct cgroup_scanner *scan);
        struct ptr_heap *heap;
+       void *data;
 };
 
 /*