xen/enlighten: Fix compile warnings.

linux/arch/x86/xen/enlighten.c: In function ‘xen_start_kernel’:
linux/arch/x86/xen/enlighten.c:226: warning: ‘cx’ may be used uninitialized in this function
linux/arch/x86/xen/enlighten.c:240: note: ‘cx’ was declared here

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 2d69617950f7c94a8e14c7e5fe7ad8730aa26eeb..947386171ba53a0ff5235bf45b358d2da25d896e 100644 (file)
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -237,7 +237,7 @@ static void xen_cpuid(unsigned int *ax, unsigned int *bx,
 
 static void __init xen_init_cpuid_mask(void)
 {
-       unsigned int ax, bx, cx, dx;
+       unsigned int ax, bx, uninitialized_var(cx), dx;
        unsigned int xsave_mask;
 
        cpuid_leaf1_edx_mask =