Merge branch 'agp-patches' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...

[linux-2.6-omap-h63xx.git] / arch / i386 / xen / setup.c

diff --git a/arch/i386/xen/setup.c b/arch/i386/xen/setup.c
index 2fe6eac510f0644c8a9f96358f0cdcf5bd72b16d..f84e772266461aec8a76b4feeb2ba318e21e0547 100644 (file)
--- a/arch/i386/xen/setup.c
+++ b/arch/i386/xen/setup.c
@@ -19,6 +19,7 @@
 #include <xen/features.h>
 
 #include "xen-ops.h"
+#include "vdso.h"
 
 /* These are code, but not functions.  Defined in entry.S */
 extern const char xen_hypervisor_callback[];
@@ -55,6 +56,18 @@ static void xen_idle(void)
        }
 }
 
+/*
+ * Set the bit indicating "nosegneg" library variants should be used.
+ */
+static void fiddle_vdso(void)
+{
+       extern u32 VDSO_NOTE_MASK; /* See ../kernel/vsyscall-note.S.  */
+       extern char vsyscall_int80_start;
+       u32 *mask = (u32 *) ((unsigned long) &VDSO_NOTE_MASK - VDSO_PRELINK +
+                            &vsyscall_int80_start);
+       *mask |= 1 << VDSO_NOTE_NONEGSEG_BIT;
+}
+
 void __init xen_arch_setup(void)
 {
        struct physdev_set_iopl set_iopl;
@@ -93,4 +106,6 @@ void __init xen_arch_setup(void)
 #endif
 
        paravirt_disable_iospace();
+
+       fiddle_vdso();
 }