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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>,
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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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