Fix a one-off error in compat_addr_ok().
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Index: 2007-01-08/xen/include/asm-x86/x86_64/uaccess.h
==================================================================---
2007-01-08.orig/xen/include/asm-x86/x86_64/uaccess.h 2006-12-18
09:49:18.000000000 +0100
+++ 2007-01-08/xen/include/asm-x86/x86_64/uaccess.h 2007-01-25
15:18:37.000000000 +0100
@@ -20,7 +20,8 @@
#define __compat_addr_ok(addr) \
((unsigned long)(addr) <
HYPERVISOR_COMPAT_VIRT_START(current->domain))
-#define compat_access_ok(addr, size) __compat_addr_ok((addr) + (size))
+#define compat_access_ok(addr, size) \
+ __compat_addr_ok((unsigned long)(addr) + ((size) ? (size) - 1 : 0))
#define compat_array_access_ok(addr,count,size) \
(likely((count) < (~0U / (size))) && \
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