[PATCH] AIO exit fix

We need to run exit_aio() when the final user of the mm goes away, else lots
of things leak.

Also remove a printk which comes out when this change is made.

This patch was acked by bcrl.

fs/aio.c

@@ -302,7 +302,6 @@ void wait_for_all_aios(struct kioctx *ctx)
 	add_wait_queue(&ctx->wait, &wait);
 	set_task_state(tsk, TASK_UNINTERRUPTIBLE);
 	while (ctx->reqs_active) {
-		printk("ctx->reqs_active = %d\n", ctx->reqs_active);
 		schedule();
 		set_task_state(tsk, TASK_UNINTERRUPTIBLE);
 	}

kernel/fork.c

@@ -380,6 +380,7 @@ void mmput(struct mm_struct *mm)
 		list_del(&mm->mmlist);
 		mmlist_nr--;
 		spin_unlock(&mmlist_lock);
+		exit_aio(mm);
 		exit_mmap(mm);
 		mmdrop(mm);
 	}