Re: [PATCH 06/11] x86/fault: Improve kernel-executing-user-memory handling

[Christoph Hellwig]

On Sun, Jan 31, 2021 at 09:24:37AM -0800, Andy Lutomirski wrote:
>  #if defined(CONFIG_X86_64) && defined(CONFIG_CPU_SUP_AMD)
> +	if (likely(boot_cpu_data.x86_vendor != X86_VENDOR_AMD
> +		   || boot_cpu_data.x86 != 0xf))

Same nitpick as for the other patch.  Maybe we wan a little inline
helper for the specific erratum that includes the vendor and family
checks in adddition to using IS_ENABLED for the config options?