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-rw-r--r--include/linux/mmzone.h19
1 files changed, 7 insertions, 12 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index b79633d3a97..39e912708e2 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -414,30 +414,25 @@ extern struct pglist_data contig_page_data;
#include <asm/mmzone.h>
+#endif /* !CONFIG_DISCONTIGMEM */
+
#if BITS_PER_LONG == 32 || defined(ARCH_HAS_ATOMIC_UNSIGNED)
/*
* with 32 bit page->flags field, we reserve 8 bits for node/zone info.
* there are 3 zones (2 bits) and this leaves 8-2=6 bits for nodes.
*/
-#define MAX_NODES_SHIFT 6
+#define FLAGS_RESERVED 8
+
#elif BITS_PER_LONG == 64
/*
* with 64 bit flags field, there's plenty of room.
*/
-#define MAX_NODES_SHIFT 10
-#endif
+#define FLAGS_RESERVED 32
-#endif /* !CONFIG_DISCONTIGMEM */
-
-#if NODES_SHIFT > MAX_NODES_SHIFT
-#error NODES_SHIFT > MAX_NODES_SHIFT
-#endif
+#else
-/* There are currently 3 zones: DMA, Normal & Highmem, thus we need 2 bits */
-#define MAX_ZONES_SHIFT 2
+#error BITS_PER_LONG not defined
-#if ZONES_SHIFT > MAX_ZONES_SHIFT
-#error ZONES_SHIFT > MAX_ZONES_SHIFT
#endif
#endif /* !__ASSEMBLY__ */