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Date:   Sat, 14 May 2022 16:55:51 +0200
From:   Peter Zijlstra <>
To:     Masahiro Yamada <>
Cc:     Vincent Mailhol <>,
        Michal Marek <>,
        Nick Desaulniers <>,
        Linux Kernel Mailing List <>,
        Arnd Bergmann <>,
        Andy Shevchenko <>,
        Rikard Falkeborn <>,
        Andrew Morton <>,
        Kees Cook <>,
        Will Deacon <>
Subject: Re: [RFC PATCH v2 2/2] kbuild: call only if
 prerequisites change

On Sat, May 14, 2022 at 03:14:48PM +0200, Peter Zijlstra wrote:
> On Sat, May 14, 2022 at 04:01:18AM +0900, Masahiro Yamada wrote:
> > I wrote a different patch.
> >
> I'm not seeing that in my inbox :-(
> AFAICT this way 'make tags' will not find and index the files, which is
> a total no-go.

Additionally, if you spuriously regenerate these files, you'll risk
rebuilding huge parts of the kernel through the dependencies.

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