vm: minimum and maximum zone IDs are now defined in arch/../vm.h

include/socks/vm.h

@@ -56,12 +56,12 @@ enum vm_flags {
 
 enum vm_zone_id {
 	/* NOTE that these are used as indices into the node_zones array in vm/zone.c
-	   they need to be continuous, and must start at 0! */
+	   they need to be continuous, and must start at 0!
+
+	   not all of these zones are implemented for every architecture. */
 	VM_ZONE_DMA     = 0u,
 	VM_ZONE_NORMAL  = 1u,
 	VM_ZONE_HIGHMEM = 2u,
-	VM_ZONE_MIN     = VM_ZONE_DMA,
-	VM_ZONE_MAX     = VM_ZONE_HIGHMEM,
 };
 
 enum vm_page_order {