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

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Message-ID: <48fd164e-959b-4263-b3c7-cef5771aa40a@linutronix.de>
Date: Sat, 20 Sep 2025 16:37:31 +0200 (GMT+02:00)
From: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
To: John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.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 <andreas@...sler.com>,
	Nick Alcock <nick.alcock@...cle.com>,
	John Stultz <jstultz@...gle.com>, Stephen Boyd <sboyd@...nel.org>,
	Shuah Khan <shuah@...nel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>, Theodore Ts'o <tytso@....edu>,
	"Jason A. Donenfeld" <Jason@...c4.com>,
	Russell King <linux@...linux.org.uk>,
	Madhavan Srinivasan <maddy@...ux.ibm.com>,
	Michael Ellerman <mpe@...erman.id.au>,
	Nicholas Piggin <npiggin@...il.com>,
	Christophe Leroy <christophe.leroy@...roup.eu>,
	Huacai Chen <chenhuacai@...nel.org>, WANG Xuerui <kernel@...0n.name>,
	Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
	Heiko Carstens <hca@...ux.ibm.com>,
	Vasily Gorbik <gor@...ux.ibm.com>,
	Alexander Gordeev <agordeev@...ux.ibm.com>,
	Christian Borntraeger <borntraeger@...ux.ibm.com>,
	Sven Schnelle <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

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 for testing!

Thomas