linux-kernel - Re: [PATCH 2/5] [RESEND] x86: avoid unneeded __div64

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Message-ID: <20230807211659.GKZNFfS+7PK71yYt0p@fat_crate.local>
Date:   Mon, 7 Aug 2023 23:16:59 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     "Maciej W. Rozycki" <macro@...am.me.uk>
Cc:     Arnd Bergmann <arnd@...db.de>, Arnd Bergmann <arnd@...nel.org>,
        linux-kernel@...r.kernel.org, x86@...nel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH 2/5] [RESEND] x86: avoid unneeded __div64_32 function
 definition

On Mon, Aug 07, 2023 at 09:37:00PM +0100, Maciej W. Rozycki wrote:
>  Otherwise you risk `__div64_32(n, base)' getting expanded to `(n, base)', 

You mean in the very obscure case of a 32-bit kernel where they don't call
do_div() but call this low level function?

I'd say if they can't be bothered to even grep the tree for the right usage,
they deserve both pieces... :)

-- 
Regards/Gruss,
    Boris.

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