linux-kernel - Re: [PATCH] x86/MCE: Get microcode revision from cpu_info instead of boot_cpu

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Message-ID: <20180601124035.GB23298@nazgul.tnic>
Date:   Fri, 1 Jun 2018 14:40:35 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     "Sironi, Filippo" <sironi@...zon.de>
Cc:     "tony.luck@...el.com" <tony.luck@...el.com>,
        "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86/MCE: Get microcode revision from cpu_info instead of
 boot_cpu_data

On Fri, Jun 01, 2018 at 12:32:02PM +0000, Sironi, Filippo wrote:
> I've that patch in my tree already, I can post it.
> I'm still curious on why you'd prefer to use boot_cpu_data for all
> CPUs instead of using cpu_data(m->extcpu) though.

Well, for starters, boot_cpu_data having stale revision is a bug in
itself already. So fixing that is already the Right Thing(tm) to do.

Then, one fine day when the whole cpu_data mess is cleaned up,
boot_cpu_data will morph into the global descriptor representing CPU
features and keeping it uptodate now will facilitate the replacement
without introducing bugs.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--