mtx_init
#define mtx_init(lockaddr, name, type, opts) mutex_init(lockaddr, name)
mtx_init(struct mtx *mutex, const char *name, const char *type,
#define mtx_init(mutex, wantipl) mtx_init_openbsd(mutex, wantipl)
mtx_init(mtx_t *mtx, int type)
void mtx_init() {}