linux-kernel - Re: [PATCH v3 00/36] sparc64: vdso: Switch to the generic vDSO library

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Message-ID: <9198795c08a6c3d448bbcbdfe620ada792af8dd3.camel@physik.fu-berlin.de>
Date: Sun, 21 Sep 2025 07:05:44 +0200
From: John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
To: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Cc: Andy Lutomirski <luto@...nel.org>, Thomas Gleixner <tglx@...utronix.de>,
  Vincenzo Frascino <vincenzo.frascino@....com>, Arnd Bergmann
 <arnd@...db.de>, "David S. Miller" <davem@...emloft.net>,  Andreas Larsson
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 <svens@...ux.ibm.com>, Nagarathnam Muthusamy
 <nagarathnam.muthusamy@...cle.com>, Shannon Nelson	 <sln@...main.com>,
 linux-kernel@...r.kernel.org, sparclinux@...r.kernel.org, 
	linux-kselftest@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	linuxppc-dev@...ts.ozlabs.org, loongarch@...ts.linux.dev, 
	linux-mips@...r.kernel.org, linux-s390@...r.kernel.org, Arnd Bergmann	
 <arnd@...nel.org>
Subject: Re: [PATCH v3 00/36] sparc64: vdso: Switch to the generic vDSO
 library

Hi Thomas,

On Sat, 2025-09-20 at 16:37 +0200, Thomas Weißschuh wrote:
> Sep 20, 2025 15:25:11 John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>:
> 
> > On Wed, 2025-09-17 at 16:00 +0200, Thomas Weißschuh wrote:
> > > The generic vDSO provides a lot common functionality shared between
> > > different architectures. SPARC is the last architecture not using it,
> > > preventing some necessary code cleanup.
> > > 
> > > Make use of the generic infrastructure.
> > > 
> > > Follow-up to and replacement for Arnd's SPARC vDSO removal patches:
> > > https://lore.kernel.org/lkml/20250707144726.4008707-1-arnd@kernel.org/
> > > 
> > > Tested on a Niagara T4 and QEMU.
> > > 
> > > This has a semantic conflict with my series "vdso: Reject absolute
> > > relocations during build". The last patch of this series expects all users
> > > of the generic vDSO library to use the vdsocheck tool.
> > > This is not the case (yet) for SPARC64. I do have the patches for the
> > > integration, the specifics will depend on which series is applied first.
> > > 
> > > Based on tip/timers/vdso.
> > 
> > Could you share a version of the series based on top of 6.17.0-rcN for
> > testing purposes? I would like to test the series on a Sun Netra 240
> > which is based on the UltraSPARC IIIi.
> 
> Here is the git branch based on rc4:
> https://git.kernel.org/pub/scm/linux/kernel/git/thomas.weissschuh/linux.git/log/?h=b4/vdso-sparc64-generic-2
> 
> Does that work for you?

Thanks, I'll give it a try.

> Thanks for testing!

Of course, I want to make sure the kernel stays working on these machines and
you're introducing large changes.

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer
`. `'   Physicist
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