Semaphore initialization

You can declare and initialize a semaphore with:

#include <asm/semaphore.h>

struct semaphore sem;
void sema_init(struct semaphore *sem, int value);

The usual technique, however, is:

DECLARE_MUTEX(name);
DECLARE_MUTEX_LOCKED(name);

Or, at run time:

void init_MUTEX(struct semaphore *sem);
void init_MUTEX_LOCKED(struct semaphore *sem);