[PATCH] ksoftirqd: missing barrier

Spotted by Andrea: we need the barriers in there to prevent reads passing
ahead of the setting of current->state.

kernel/softirq.c

@@ -331,7 +331,7 @@ static int ksoftirqd(void * __bind_cpu)
 			cond_resched();
 		}
 
-		__set_current_state(TASK_INTERRUPTIBLE);
+		set_current_state(TASK_INTERRUPTIBLE);
 	}
 	__set_current_state(TASK_RUNNING);
 	return 0;
@@ -339,10 +339,10 @@ static int ksoftirqd(void * __bind_cpu)
 wait_to_die:
 	preempt_enable();
 	/* Wait for kthread_stop */
-	__set_current_state(TASK_INTERRUPTIBLE);
+	set_current_state(TASK_INTERRUPTIBLE);
 	while (!kthread_should_stop()) {
 		schedule();
-		__set_current_state(TASK_INTERRUPTIBLE);
+		set_current_state(TASK_INTERRUPTIBLE);
 	}
 	__set_current_state(TASK_RUNNING);
 	return 0;