linux-kernel - Re: [PATCH v5 00/34] sparc64: vdso: Switch to the generic vDSO library

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Message-ID: <aQyqcH39IPLRWMt_@finisterre.sirena.org.uk>
Date: Thu, 6 Nov 2025 14:02:24 +0000
From: Mark Brown <broonie@...nel.org>
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 <andreas@...sler.com>,
	Nick Alcock <nick.alcock@...cle.com>,
	John Stultz <jstultz@...gle.com>, Stephen Boyd <sboyd@...nel.org>,
	John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
	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>,
	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 v5 00/34] sparc64: vdso: Switch to the generic vDSO
 library

On Thu, Nov 06, 2025 at 11:01:53AM +0100, 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.

> ---
> Changes in v5:
> - Merge the patches for 'struct page' mapping and dynamic allocation
> - Zero out newly-allocated data pages
> - Pick up review tags
> - Link to v4: https://lore.kernel.org/r/20251014-vdso-sparc64-generic-2-v4-0-e0607bf49dea@linutronix.de

I've validated that the zeroing fixes the issues we were seeing with
boot failures on a reasonable chunk of the arm64 platforms:

Tested-by: Mark Brown <broonie@...nel.org>

I didn't get to all of them but I'd expect the rest are also fine.

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