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Message-Id: <d94de5b8-db92-4055-9484-f2666973c02a@app.fastmail.com>
Date:   Wed, 08 Nov 2023 20:37:12 +0100
From:   "Arnd Bergmann" <arnd@...db.de>
To:     "Christophe Leroy" <christophe.leroy@...roup.eu>,
        "Arnd Bergmann" <arnd@...nel.org>,
        "Andrew Morton" <akpm@...ux-foundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Masahiro Yamada" <masahiroy@...nel.org>,
        "linux-kbuild@...r.kernel.org" <linux-kbuild@...r.kernel.org>
Cc:     "Matt Turner" <mattst88@...il.com>,
        "Vineet Gupta" <vgupta@...nel.org>,
        "Russell King" <linux@...linux.org.uk>,
        "Catalin Marinas" <catalin.marinas@....com>,
        "Will Deacon" <will@...nel.org>,
        "Steven Rostedt" <rostedt@...dmis.org>,
        "Masami Hiramatsu" <mhiramat@...nel.org>,
        "Mark Rutland" <mark.rutland@....com>, guoren <guoren@...nel.org>,
        "Peter Zijlstra" <peterz@...radead.org>,
        "Ard Biesheuvel" <ardb@...nel.org>,
        "Huacai Chen" <chenhuacai@...nel.org>,
        "Greg Ungerer" <gerg@...ux-m68k.org>,
        "Michal Simek" <monstr@...str.eu>,
        "Thomas Bogendoerfer" <tsbogend@...ha.franken.de>,
        "Dinh Nguyen" <dinguyen@...nel.org>,
        "Michael Ellerman" <mpe@...erman.id.au>,
        "Nicholas Piggin" <npiggin@...il.com>,
        "Geoff Levand" <geoff@...radead.org>,
        "Palmer Dabbelt" <palmer@...belt.com>,
        "Heiko Carstens" <hca@...ux.ibm.com>,
        "John Paul Adrian Glaubitz" <glaubitz@...sik.fu-berlin.de>,
        "David S . Miller" <davem@...emloft.net>,
        "Andy Lutomirski" <luto@...nel.org>,
        "Thomas Gleixner" <tglx@...utronix.de>,
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        "Vincent Guittot" <vincent.guittot@...aro.org>,
        "Nathan Chancellor" <nathan@...nel.org>,
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        "Nicolas Schier" <nicolas@...sle.eu>,
        "Alexander Viro" <viro@...iv.linux.org.uk>,
        Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
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Subject: Re: [PATCH 15/22] arch: vdso: consolidate gettime prototypes

On Wed, Nov 8, 2023, at 19:31, Christophe Leroy wrote:
> Le 08/11/2023 à 13:58, Arnd Bergmann a écrit :

> powerpc has functions doing more or less the same, they are called 
> __c_kernel_clock_gettime() and alike with their prototypes siting in 
> arch/powerpc/include/asm/vdso/gettimeofday.h
>
> Should those prototypes be moved to include/vdso/gettime.h too and 
> eventually renamed, or are they considered too powerpc specific ?

I don't actually know, my initial interpretation was that
these function names are part of the user ABI for the vdso,
but I never looked closely enough at how vdso works to
be sure what the actual ABI is.

If __c_kernel_clock_gettime() etc are not part of the user-facing
ABI, I think renaming them for consistency with the other
architectures would be best.

     Arnd

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