1 files changed, 8 insertions, 1 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 393ce94e54b7..3ff5c8519abd 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2236,9 +2236,16 @@ static inline void task_unlock(struct task_struct *p)
         spin_unlock(&p->alloc_lock);
 }
 
-extern struct sighand_struct *lock_task_sighand(struct task_struct *tsk,
+extern struct sighand_struct *__lock_task_sighand(struct task_struct *tsk,
                                                         unsigned long *flags);
 
+#define lock_task_sighand(tsk, flags)                                   \
+({      struct sighand_struct *__ss;                                    \
+        __cond_lock(&(tsk)->sighand->siglock,                           \
+                    (__ss = __lock_task_sighand(tsk, flags)));          \
+        __ss;                                                           \
+})                                                                      \
+
 static inline void unlock_task_sighand(struct task_struct *tsk,
                                                 unsigned long *flags)
 {