___mp_lock_init
void ___mp_lock_init(struct __mp_lock *);
#define __mp_lock_init ___mp_lock_init
void ___mp_lock_init(struct __mp_lock *, const struct lock_type *);
___mp_lock_init((mpl), &__lock_type); \
#define __mp_lock_init(mpl) ___mp_lock_init((mpl), NULL)