Re: [PATCH] Revert "module: Add retpoline tag to VERMAGIC"

[Randy Dunlap]

On 01/24/2018 10:17 AM, Andi Kleen wrote:

> diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
> index e4dc26185aa7..9064b20473a7 100644
> --- a/arch/x86/kernel/cpu/bugs.c
> +++ b/arch/x86/kernel/cpu/bugs.c
> @@ -93,6 +93,18 @@ static const char *spectre_v2_strings[] = {
>  
>  static enum spectre_v2_mitigation spectre_v2_enabled = SPECTRE_V2_NONE;
>  
> +/* A module has been loaded. Disable reporting that we're good. */
> +void disable_retpoline(void)
> +{
> +	spectre_v2_enabled = SPECTRE_V2_NONE;
> +	pr_err("system may be vunerable to spectre\n");

	                      vulnerable

> +}


-- 
~Randy