net/xilinx: remove __dev* attributes

[firefly-linux-kernel-4.4.55.git] / kernel / cgroup.c

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 75aec12c78a0aeb7c96f761572e5d88777382e95..f24f724620dd8489fc2e3cb9781433df84096c96 100644 (file)
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -4883,19 +4883,10 @@ void cgroup_post_fork(struct task_struct *child)
         */
        if (use_task_css_set_links) {
                write_lock(&css_set_lock);
-               if (list_empty(&child->cg_list)) {
-                       /*
-                        * It's safe to use child->cgroups without task_lock()
-                        * here because we are protected through
-                        * threadgroup_change_begin() against concurrent
-                        * css_set change in cgroup_task_migrate(). Also
-                        * the task can't exit at that point until
-                        * wake_up_new_task() is called, so we are protected
-                        * against cgroup_exit() setting child->cgroup to
-                        * init_css_set.
-                        */
+               task_lock(child);
+               if (list_empty(&child->cg_list))
                        list_add(&child->cg_list, &child->cgroups->tasks);
-               }
+               task_unlock(child);
                write_unlock(&css_set_lock);
        }
 }