linux-kernel - Re: [PATCH] x86/mce: Simplify CPU vendor checks for AMD/Hygon and Intel/Zhaoxin

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Date:   Tue, 22 Feb 2022 18:10:57 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Carlos Bilbao <carlos.bilbao@....com>
Cc:     tony.luck@...el.com, yazen.ghannam@....com,
        Smita.KoralahalliChannabasappa@....com,
        linux-kernel@...r.kernel.org, linux-edac@...r.kernel.org
Subject: Re: [PATCH] x86/mce: Simplify CPU vendor checks for AMD/Hygon and
 Intel/Zhaoxin

Hi,

On Tue, Feb 22, 2022 at 10:42:25AM -0600, Carlos Bilbao wrote:
> the point is to simplify the code (as the patch stated).

But it doesn't simplify the code - it makes it obscure.

Also, your "simplification" breaks the moment you need to do something
for the one vendor but *not* for the other.

Because in such cases you'll have to do

	if (mce_flags.amd_compatible && m->cpuvendor != X86_VENDOR_HYGON)

which makes me go, "huh what?!"

So no, that's not better.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette