linux-kernel – 如何使用wake_up_interruptible

我想知道如果它返回void,我怎么能使用wake_up_interruptible： http://www.cs.fsu.edu/~baker/devices/lxr/http/source/linux/include/linux/wait.h#L161(_wake_up函数返回void).例如,down_interruptible函数返回int： http://www.cs.fsu.edu/~baker/devices/lxr/http/source/linux/kernel/semaphore.c#L75这允许编写这样的代码,例如：

if ( down_interruptible(&dev->sem) )
    return -ERESTARTSYS;
// continue: down_interruptible succeeded

当我调用wake_up_interruptible并且它被中断时,如果它返回void,我怎么知道呢？

for (;;) {
   wait_event_interruptible(wait_queue,condition);
   /* Some processing */
}

if (something_happened)
   wake_up_interruptible(wait_queue);