Function rman_init

freebsd/kern/subr_rman.c:127–155

}

int
rman_init(struct rman *rm)
{
	static int once = 0;

	if (once == 0) {
		once = 1;
		TAILQ_INIT(&rman_head);
		mtx_init(&rman_mtx, "rman head", NULL, MTX_DEF);
	}

	if (rm->rm_start == 0 && rm->rm_end == 0)
		rm->rm_end = ~0;
	if (rm->rm_type == RMAN_UNINIT)
		panic("rman_init");
	if (rm->rm_type == RMAN_GAUGE)
		panic("implement RMAN_GAUGE");

	TAILQ_INIT(&rm->rm_list);
	rm->rm_mtx = malloc(sizeof *rm->rm_mtx, M_RMAN, M_NOWAIT | M_ZERO);
	if (rm->rm_mtx == NULL)
		return ENOMEM;
	mtx_init(rm->rm_mtx, "rman", NULL, MTX_DEF);

	mtx_lock(&rman_mtx);
	TAILQ_INSERT_TAIL(&rman_head, rm, rm_link);
	mtx_unlock(&rman_mtx);
	return 0;
}

int
rman_manage_region(struct rman *rm, rman_res_t start, rman_res_t end)