struct semaphore name = __SEMAPHORE_INITIALIZER (name,count)
#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC (name,1)
-#define DECLARE_MUTEX_LOCKED(name) __DECLARE_SEMAPHORE_GENERIC (name,0)
static inline void sema_init (struct semaphore *sem, int val)
{