signal: Use task_is_*

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>

kernel/signal.c

@@ -838,7 +838,7 @@ static inline int wants_signal(int sig, struct task_struct *p)
 		return 0;
 	if (sig == SIGKILL)
 		return 1;
-	if (p->state & (TASK_STOPPED | TASK_TRACED))
+	if (task_is_stopped_or_traced(p))
 		return 0;
 	return task_curr(p) || !signal_pending(p);
 }
@@ -1441,7 +1441,7 @@ void do_notify_parent(struct task_struct *tsk, int sig)
 	BUG_ON(sig == -1);
 
  	/* do_notify_parent_cldstop should have been called instead.  */
- 	BUG_ON(tsk->state & (TASK_STOPPED|TASK_TRACED));
+ 	BUG_ON(task_is_stopped_or_traced(tsk));
 
 	BUG_ON(!tsk->ptrace &&
 	       (tsk->group_leader != tsk || !thread_group_empty(tsk)));
@@ -1729,7 +1729,7 @@ static int do_signal_stop(int signr)
 			 * so this check has no races.
 			 */
 			if (!t->exit_state &&
-			    !(t->state & (TASK_STOPPED|TASK_TRACED))) {
+			    !task_is_stopped_or_traced(t)) {
 				stop_count++;
 				signal_wake_up(t, 0);
 			}