X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=mm%2Fmmzone.c;h=f5b7d1760213e53db3c46e84dde56daf219ea0cd;hb=0bb38a5cdeb39f543657ec6fb9950343d2de6918;hp=16ce8b955dcff121623fc14810a9f12999f7ea3d;hpb=5bead2a0680687b9576d57c177988e8aa082b922;p=safe%2Fjmp%2Flinux-2.6

diff --git a/mm/mmzone.c b/mm/mmzone.c
index 16ce8b9..f5b7d17 100644
--- a/mm/mmzone.c
+++ b/mm/mmzone.c
@@ -6,6 +6,7 @@
 
 
 #include <linux/stddef.h>
+#include <linux/mm.h>
 #include <linux/mmzone.h>
 #include <linux/module.h>
 
@@ -72,3 +73,17 @@ struct zoneref *next_zones_zonelist(struct zoneref *z,
 	*zone = zonelist_zone(z);
 	return z;
 }
+
+#ifdef CONFIG_ARCH_HAS_HOLES_MEMORYMODEL
+int memmap_valid_within(unsigned long pfn,
+					struct page *page, struct zone *zone)
+{
+	if (page_to_pfn(page) != pfn)
+		return 0;
+
+	if (page_zone(page) != zone)
+		return 0;
+
+	return 1;
+}
+#endif /* CONFIG_ARCH_HAS_HOLES_MEMORYMODEL */