Index: sys/amd64/amd64/pmap.c
===================================================================
--- sys/amd64/amd64/pmap.c
+++ sys/amd64/amd64/pmap.c
@@ -1422,7 +1422,7 @@
 		if (ppim->va == 0)
 			continue;
 		/* Make the direct map consistent */
-		if (ppim->pa < dmaplimit && ppim->pa + ppim->sz < dmaplimit) {
+		if (ppim->pa < dmaplimit && ppim->pa + ppim->sz <= dmaplimit) {
 			(void)pmap_change_attr(PHYS_TO_DMAP(ppim->pa),
 			    ppim->sz, ppim->mode);
 		}
@@ -7055,7 +7055,7 @@
 		 * If the specified range of physical addresses fits within
 		 * the direct map window, use the direct map.
 		 */
-		if (pa < dmaplimit && pa + size < dmaplimit) {
+		if (pa < dmaplimit && pa + size <= dmaplimit) {
 			va = PHYS_TO_DMAP(pa);
 			if (!pmap_change_attr(va, size, mode))
 				return ((void *)(va + offset));