linux-kernel - Re: [PATCH v4 16/24] EDAC/amd64: Define function to make space for CS ID

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Message-ID: <Yiu4guP6xPUuSzuz@zn.tnic>
Date:   Fri, 11 Mar 2022 22:00:50 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Yazen Ghannam <yazen.ghannam@....com>
Cc:     linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org,
        mchehab@...nel.org, tony.luck@...el.com, james.morse@....com,
        rric@...nel.org, Smita.KoralahalliChannabasappa@....com
Subject: Re: [PATCH v4 16/24] EDAC/amd64: Define function to make space for
 CS ID

On Wed, Mar 09, 2022 at 10:25:22PM +0000, Yazen Ghannam wrote:
> I guess this could be "addr = func(x, y, addr)", but why not just operate on
> the value directly? There isn't an error condition here that's obvious to me.

Because when you look at the callsite:

	ctx->make_space_for_cs_id(ctx);

and compare it with the version I'm suggesting:

	ctx->ret_addr = ctx->add_coherent_slave_id_slice(ctx);

my version says exactly what it does: it adds the bit slice of CS ID to
ret_addr. You don't even have to look at the function body in order to
know what's going on.

-- 
Regards/Gruss,
    Boris.

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