Index: linux-2.6.19-rc1-mm1/mm/memory.c
===================================================================
--- linux-2.6.19-rc1-mm1.orig/mm/memory.c	2006-10-11 01:06:35.000000000 -0500
+++ linux-2.6.19-rc1-mm1/mm/memory.c	2006-10-11 01:16:06.318118042 -0500
@@ -52,7 +52,7 @@
 #include <linux/writeback.h>
 
 #include <asm/pgalloc.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <asm/tlb.h>
 #include <asm/tlbflush.h>
 #include <asm/pgtable.h>
@@ -73,14 +73,13 @@
 unsigned long mem_map_min = MEM_MAP_MIN;
 unsigned long mem_map_max = MEM_MAP_MAX;
 
-int __valid_address_range(void *x, unsigned int len)
+int __valid_address_range(void *x, unsigned long len)
 {
-  if (probe_kernel_address(x) == -EFAULT)
-	return 0;
-  return kaddr_to_pfn(x) == kaddr_to_pfn(x + len -1) ||
-		probe_kernel_addres(x + len - 1) != -EFAULT;
+	u8 yy[len];
+
+	return probe_kernel_address(x, yy) != -EFAULT;
 }
-EXPORT_SYMBOL(__valid_address);
+EXPORT_SYMBOL(__valid_address_range);
 
 #endif