426 	struct mbuf *m, *tail;  in paddr_ext_mbuf()  local
442 	m = tail = extpg_alloc(cb_arg, how);  in paddr_ext_mbuf()
446 		if (!can_append_paddr(tail, pa)) {  in paddr_ext_mbuf()
447 			MBUF_EXT_PGS_ASSERT_SANITY(tail);  in paddr_ext_mbuf()
448 			tail->m_next = extpg_alloc(cb_arg, how);  in paddr_ext_mbuf()
449 			if (tail->m_next == NULL)  in paddr_ext_mbuf()
451 			tail = tail->m_next;  in paddr_ext_mbuf()
454 		appended = append_paddr_range(tail, pa, len);  in paddr_ext_mbuf()
462 	MBUF_EXT_PGS_ASSERT_SANITY(tail);  in paddr_ext_mbuf()
474 	struct mbuf *m, *n, *tail;  in vlist_ext_mbuf()  local
487 	m = tail = NULL;  in vlist_ext_mbuf()
502 			tail = m;  in vlist_ext_mbuf()
504 			tail->m_next = n;  in vlist_ext_mbuf()
505 			tail = n;  in vlist_ext_mbuf()
526 	struct mbuf *m, *tail;  in plist_ext_mbuf()  local
538 	m = tail = extpg_alloc(cb_arg, how);  in plist_ext_mbuf()
577 			if (!can_append_paddr(tail, pa)) {  in plist_ext_mbuf()
578 				MBUF_EXT_PGS_ASSERT_SANITY(tail);  in plist_ext_mbuf()
579 				tail->m_next = extpg_alloc(cb_arg, how);  in plist_ext_mbuf()
580 				if (tail->m_next == NULL)  in plist_ext_mbuf()
582 				tail = tail->m_next;  in plist_ext_mbuf()
585 			appended = append_paddr_range(tail, pa, todo);  in plist_ext_mbuf()
593 	MBUF_EXT_PGS_ASSERT_SANITY(tail);  in plist_ext_mbuf()
606 	struct mbuf *m, *tail;  in vmpages_ext_mbuf()  local
626 	m = tail = extpg_alloc(cb_arg, how);  in vmpages_ext_mbuf()
643 		if (tail->m_epg_npgs == MBUF_PEXT_MAX_PGS) {  in vmpages_ext_mbuf()
644 			MBUF_EXT_PGS_ASSERT_SANITY(tail);  in vmpages_ext_mbuf()
645 			tail->m_next = extpg_alloc(cb_arg, how);  in vmpages_ext_mbuf()
646 			if (tail->m_next == NULL)  in vmpages_ext_mbuf()
648 			tail = tail->m_next;  in vmpages_ext_mbuf()
651 		tail->m_epg_pa[tail->m_epg_npgs] = VM_PAGE_TO_PHYS(*ma);  in vmpages_ext_mbuf()
653 		tail->m_epg_npgs++;  in vmpages_ext_mbuf()
654 		tail->m_epg_last_len = PAGE_SIZE;  in vmpages_ext_mbuf()
655 		tail->m_len += PAGE_SIZE;  in vmpages_ext_mbuf()
661 		if (tail->m_epg_npgs == MBUF_PEXT_MAX_PGS) {  in vmpages_ext_mbuf()
662 			MBUF_EXT_PGS_ASSERT_SANITY(tail);  in vmpages_ext_mbuf()
663 			tail->m_next = extpg_alloc(cb_arg, how);  in vmpages_ext_mbuf()
664 			if (tail->m_next == NULL)  in vmpages_ext_mbuf()
666 			tail = tail->m_next;  in vmpages_ext_mbuf()
669 		tail->m_epg_pa[tail->m_epg_npgs] = VM_PAGE_TO_PHYS(*ma);  in vmpages_ext_mbuf()
671 		tail->m_epg_npgs++;  in vmpages_ext_mbuf()
672 		tail->m_epg_last_len = len;  in vmpages_ext_mbuf()
673 		tail->m_len += len;  in vmpages_ext_mbuf()
676 	MBUF_EXT_PGS_ASSERT_SANITY(tail);  in vmpages_ext_mbuf()
691 	struct mbuf *m, *tail;  in mbuf_subchain()  local
714 	tail = m;  in mbuf_subchain()
725 		tail->m_next = m_get(how, MT_DATA);  in mbuf_subchain()
726 		if (tail->m_next == NULL)  in mbuf_subchain()
728 		tail = tail->m_next;  in mbuf_subchain()
729 		tail->m_len = m0->m_len;  in mbuf_subchain()
731 			tail->m_data = m0->m_data;  in mbuf_subchain()
732 			mb_dupcl(tail, m0);  in mbuf_subchain()
734 			memcpy(mtod(tail, void *), mtod(m0, void *),  in mbuf_subchain()
735 			    tail->m_len);  in mbuf_subchain()
737 		totlen += tail->m_len;  in mbuf_subchain()
739 		len -= tail->m_len;  in mbuf_subchain()