#define DECLARE_WAITQUEUE(name, tsk) /
wait_queue_t name =__WAITQUEUE_INITIALIZER(name, tsk)
#define __WAITQUEUE_INITIALIZER(name,tsk) {task: tsk, task_list: { NULL,NULL}, __WAITQUEUE_DEBUG_INI(name)}
#define DECLARE_WAITQUEUE(name, tsk)
阅读背景：
DECLARE_WAITQUEUE 将进程加入等待队列
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