+#define MAP_HUGE_SHIFT 26
+#define MAP_HUGE_MASK 0x3f
+#define MAP_HUGE_64KB (16 << 26)
+#define MAP_HUGE_512KB (19 << 26)
+#define MAP_HUGE_1MB (20 << 26)
+#define MAP_HUGE_2MB (21 << 26)
+#define MAP_HUGE_8MB (23 << 26)
+#define MAP_HUGE_16MB (24 << 26)
+#define MAP_HUGE_32MB (25 << 26)
+#define MAP_HUGE_256MB (28 << 26)
+#define MAP_HUGE_512MB (29 << 26)
+#define MAP_HUGE_1GB (30 << 26)
+#define MAP_HUGE_2GB (31 << 26)
+#define MAP_HUGE_16GB (34U << 26)
+