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宏定义的展开没做好，留个坑，搞明白gcc - E后过来补上三

#define DECLARE_WAIT_QUEUE_HEAD(name) \
	struct wait_queue_head name = __WAIT_QUEUE_HEAD_INITIALIZER(name)

struct wait_queue_head {
	spinlock_t		lock;
	struct list_head	head;
};

#define __WAIT_QUEUE_HEAD_INITIALIZER(name) {					\
	.lock		= __SPIN_LOCK_UNLOCKED(name.lock),			\
	.head		= LIST_HEAD_INIT(name.head) }

#define ___SPIN_LOCK_INITIALIZER(lockname)	\
	{					\
	.raw_lock = __ARCH_SPIN_LOCK_UNLOCKED,	\
	SPIN_DEBUG_INIT(lockname)		\
	SPIN_DEP_MAP_INIT(lockname) }

# define SPIN_DEBUG_INIT(lockname)		\
	.magic = SPINLOCK_MAGIC,		\
	.owner_cpu = -1,			\
	.owner = SPINLOCK_OWNER_INIT,