exit: add lock context annotation on find_new_reaper()

find_new_reaper() releases and regrabs tasklist_lock but was missing
proper annotations.  Add it.  This remove following sparse warning:

 warning: context imbalance in 'find_new_reaper' - unexpected unlock

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Acked-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/kernel/exit.c b/kernel/exit.c
index 894179a32ec1..b194febf5799 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -703,6 +703,8 @@ static void exit_mm(struct task_struct * tsk)
  * space.
  */
 static struct task_struct *find_new_reaper(struct task_struct *father)
+        __releases(&tasklist_lock)
+        __acquires(&tasklist_lock)
 {
         struct pid_namespace *pid_ns = task_active_pid_ns(father);
         struct task_struct *thread;