Re: [PATCH RFC 2/4] x86/arch_prctl: add ARCH_GET_NOPTI and ARCH_SET_NOPTI to enable/disable PTI

[Peter Zijlstra]

On Mon, Jan 08, 2018 at 05:12:17PM +0100, Willy Tarreau wrote:
> +             if (doit) {
> +                     if (arg2)
> +                             task_thread_info(task)->flags |= _TIF_NOPTI;
> +                     else
> +                             task_thread_info(task)->flags &= ~_TIF_NOPTI;

{set,clear}_thread_flag() please, the above is not SMP safe.