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Message-ID: <3194fef3-68a7-327b-395b-a98bbb12e40a@intel.com>
Date:   Tue, 15 May 2018 08:36:35 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Fenghua Yu <fenghua.yu@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...e.hu>,
        "H. Peter Anvin" <hpa@...ux.intel.com>,
        Ashok Raj <ashok.raj@...el.com>,
        Ravi V Shankar <ravi.v.shankar@...el.com>,
        Tony Luck <tony.luck@...el.com>,
        Rafael Wysocki <rafael.j.wysocki@...el.com>,
        Arjan van de Ven <arjan@...radead.org>,
        Alan Cox <alan@...ux.intel.com>
Cc:     x86 <x86@...nel.org>, linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 01/15] x86/split_lock: Add CONFIG and enumerate #AC
 exception for split locked access feature

On 05/14/2018 11:52 AM, Fenghua Yu wrote:
> +#include <linux/printk.h>
> +#include <asm/msr.h>
> +
> +static bool split_lock_ac_supported;

Was there a reason not to use an X86_FEATURE* bit for this?

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