429 	vmem_seg_t *newseg, *span;  in vmem_span_create()  local
459 	span = vmem_seg_create(vmp, knext->vs_aprev, start, end);  in vmem_span_create()
460 	span->vs_type = VMEM_SPAN;  in vmem_span_create()
461 	VMEM_INSERT(knext->vs_kprev, span, k);  in vmem_span_create()
463 	newseg = vmem_seg_create(vmp, span, start, end);  in vmem_span_create()
480 	vmem_seg_t *span = vsp->vs_aprev;  in vmem_span_destroy()  local
484 	ASSERT(span->vs_type == VMEM_SPAN);  in vmem_span_destroy()
490 	VMEM_DELETE(span, k);  in vmem_span_destroy()
493 	vmem_seg_destroy(vmp, span);  in vmem_span_destroy()
1195 	vmem_seg_t *span;  in vmem_extend_unlocked()  local
1205 	for (span = end->vs_kprev; span != end; span = span->vs_kprev) {  in vmem_extend_unlocked()
1206 		if (span->vs_end == addr || span->vs_start == endaddr)  in vmem_extend_unlocked()
1210 	if (span == end)  in vmem_extend_unlocked()
1212 	if (span->vs_kprev->vs_end == addr && span->vs_start == endaddr) {  in vmem_extend_unlocked()
1213 		vmem_seg_t *prevspan = span->vs_kprev;  in vmem_extend_unlocked()
1214 		vmem_seg_t *nextseg = span->vs_anext;  in vmem_extend_unlocked()
1215 		vmem_seg_t *prevseg = span->vs_aprev;  in vmem_extend_unlocked()
1220 		prevspan->vs_end = span->vs_end;  in vmem_extend_unlocked()
1241 			VMEM_DELETE(span, k);  in vmem_extend_unlocked()
1243 			vmem_seg_destroy(vmp, span);  in vmem_extend_unlocked()
1252 			VMEM_DELETE(span, k);  in vmem_extend_unlocked()
1253 			vmem_seg_destroy(vmp, span);  in vmem_extend_unlocked()
1265 			VMEM_DELETE(span, k);  in vmem_extend_unlocked()
1266 			vmem_seg_destroy(vmp, span);  in vmem_extend_unlocked()
1276 			VMEM_DELETE(span, k);  in vmem_extend_unlocked()
1277 			span->vs_start = addr;  in vmem_extend_unlocked()
1278 			span->vs_end = endaddr;  in vmem_extend_unlocked()
1280 			vsp = span;  in vmem_extend_unlocked()
1282 	} else if (span->vs_end == addr) {  in vmem_extend_unlocked()
1283 		vmem_seg_t *oldseg = span->vs_knext->vs_aprev;  in vmem_extend_unlocked()
1284 		span->vs_end = endaddr;  in vmem_extend_unlocked()
1295 		vmem_seg_t *oldseg = span->vs_anext;  in vmem_extend_unlocked()
1296 		ASSERT(span->vs_start == endaddr);  in vmem_extend_unlocked()
1297 		span->vs_start = addr;  in vmem_extend_unlocked()
1306 			vsp = vmem_seg_create(vmp, span, addr, endaddr);  in vmem_extend_unlocked()