linux-kernel - Re: [PATCH 2/2] x86/speculation: Provide application property based STIBP protection

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Message-ID: <20180920075717.GL24124@hirez.programming.kicks-ass.net>
Date:   Thu, 20 Sep 2018 09:57:17 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Tim Chen <tim.c.chen@...ux.intel.com>
Cc:     Jiri Kosina <jikos@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Tom Lendacky <thomas.lendacky@....com>,
        Ingo Molnar <mingo@...hat.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Andi Kleen <ak@...ux.intel.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Casey Schaufler <casey.schaufler@...el.com>,
        Asit Mallick <asit.k.mallick@...el.com>,
        Arjan van de Ven <arjan@...ux.intel.com>,
        Jon Masters <jcm@...hat.com>, linux-kernel@...r.kernel.org,
        x86@...nel.org
Subject: Re: [PATCH 2/2] x86/speculation: Provide application property based
 STIBP protection

On Wed, Sep 19, 2018 at 02:35:30PM -0700, Tim Chen wrote:
> +	if (get_dumpable(tsk->mm) != SUID_DUMP_USER)
> +		test_and_set_tsk_thread_flag(tsk, TIF_STIBP);
> +	else
> +		test_and_clear_tsk_thread_flag(tsk, TIF_STIBP);
> +}

s/test_and_//