Function key_freesp

freebsd/netipsec/key.c:1182–1199

* Must be called after calling key_allocsp(). */

 * Must be called after calling key_allocsp().
 */
void
key_freesp(struct secpolicy **spp)
{
	struct secpolicy *sp = *spp;

	IPSEC_ASSERT(sp != NULL, ("null sp"));
	if (SP_DELREF(sp) == 0)
		return;

	KEYDBG(IPSEC_STAMP,
	    printf("%s: last reference to SP(%p)\n", __func__, sp));
	KEYDBG(IPSEC_DATA, kdebug_secpolicy(sp));

	*spp = NULL;
	while (sp->tcount > 0)
		ipsec_delisr(sp->req[--sp->tcount]);
	free(sp, M_IPSEC_SP);
}

static void
key_unlink(struct secpolicy *sp)