On 07/21/2018 03:49 PM, M. Vefa Bicakci wrote:
> diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
> index 439a94bf89ad..87afb000142a 100644
> --- a/arch/x86/xen/enlighten_pv.c
> +++ b/arch/x86/xen/enlighten_pv.c
> @@ -1257,6 +1257,7 @@ asmlinkage __visible void __init xen_start_kernel(void)
>  
>       /* Work out if we support NX */
>       get_cpu_cap(&boot_cpu_data);
> +     get_cpu_address_sizes(&boot_cpu_data);
>       x86_configure_nx();


Have you observed any problems without this call? get_cpu_cap() is only
called here to set X86_FEATURE_NX, and is then called again, together
with get_cpu_address_sizes(), from early_identify_cpu().

-boris


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