[patch] x86, xen, vdso: fix build error, add sysctl_vsyscall32

[Ingo Molnar]

commit c187263834465c2beededb4d19e7f6bab18cc757
Author: Ingo Molnar <mingo@xxxxxxx>
Date:   Fri Jul 11 22:34:26 2008 +0200

    x86, xen, vdso: fix build error, add sysctl_vsyscall32
    
    Xen recently tried to make use of sysctl_vsyscall32, with this result:
    
     arch/x86/xen/built-in.o: In function `xen_enable_syscall':
     (.cpuinit.text+0xdb): undefined reference to `sysctl_vsyscall32'
    
    turns out when sysctl_vsyscall32 use was introduced, the variable
    was not defined anywhere.
    
    Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
 arch/x86/vdso/vdso32-setup.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/x86/vdso/vdso32-setup.c b/arch/x86/vdso/vdso32-setup.c
index 0bce542..0645fe9 100644
--- a/arch/x86/vdso/vdso32-setup.c
+++ b/arch/x86/vdso/vdso32-setup.c
@@ -377,6 +377,8 @@ __initcall(sysenter_setup);
 /* Register vsyscall32 into the ABI table */
 #include <linux/sysctl.h>
 
+int sysctl_vsyscall32;
+
 static ctl_table abi_table2[] = {
 	{
 		.procname	= "vsyscall32",
--
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