# HG changeset patch
# User Keir Fraser <keir@xen.org>
# Date 1314800089 -3600
# Node ID 72edc40e2942a3cf0ee8e0d3a330d2e5c2bdfb53
# Parent  ac9aa65050e9abc8f1c12c8603acf3b99e22cddc
x86-64: Fix off-by-one error in __addr_ok() macro

Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Keir Fraser <keir@xen.org>

Index: xen-4.1.2-testing/xen/include/asm-x86/x86_64/uaccess.h
===================================================================
--- xen-4.1.2-testing.orig/xen/include/asm-x86/x86_64/uaccess.h
+++ xen-4.1.2-testing/xen/include/asm-x86/x86_64/uaccess.h
@@ -21,7 +21,7 @@ void free_compat_arg_xlat(struct vcpu *v
  * non-canonical address (and thus fault) before ever reaching VIRT_START.
  */
 #define __addr_ok(addr) \
-    (((unsigned long)(addr) < (1UL<<48)) || \
+    (((unsigned long)(addr) < (1UL<<47)) || \
      ((unsigned long)(addr) >= HYPERVISOR_VIRT_END))
 
 #define access_ok(addr, size) \