linux-kernel - Re: [patch V5 02/12] uaccess: Provide ASM GOTO safe wrappers for unsafe_*

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Message-ID: <CAKQ1sVO9YmWqo2uzk7NbssgWuwnQ-o4Yf2+bCP8UmHAU3u8KmQ@mail.gmail.com>
Date: Tue, 28 Oct 2025 15:04:46 +0100
From: Yann Ylavic <ylavic.dev@...il.com>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: LKML <linux-kernel@...r.kernel.org>, 
	Linus Torvalds <torvalds@...ux-foundation.org>, kernel test robot <lkp@...el.com>, 
	Russell King <linux@...linux.org.uk>, linux-arm-kernel@...ts.infradead.org, 
	x86@...nel.org, Madhavan Srinivasan <maddy@...ux.ibm.com>, Michael Ellerman <mpe@...erman.id.au>, 
	Nicholas Piggin <npiggin@...il.com>, Christophe Leroy <christophe.leroy@...roup.eu>, 
	linuxppc-dev@...ts.ozlabs.org, Paul Walmsley <pjw@...nel.org>, 
	Palmer Dabbelt <palmer@...belt.com>, linux-riscv@...ts.infradead.org, 
	Heiko Carstens <hca@...ux.ibm.com>, Christian Borntraeger <borntraeger@...ux.ibm.com>, 
	Sven Schnelle <svens@...ux.ibm.com>, linux-s390@...r.kernel.org, 
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, Andrew Cooper <andrew.cooper3@...rix.com>, 
	David Laight <david.laight.linux@...il.com>, Julia Lawall <Julia.Lawall@...ia.fr>, 
	Nicolas Palix <nicolas.palix@...g.fr>, Peter Zijlstra <peterz@...radead.org>, 
	Darren Hart <dvhart@...radead.org>, Davidlohr Bueso <dave@...olabs.net>, 
	André Almeida <andrealmeid@...lia.com>, 
	Alexander Viro <viro@...iv.linux.org.uk>, Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>, 
	linux-fsdevel@...r.kernel.org
Subject: Re: [patch V5 02/12] uaccess: Provide ASM GOTO safe wrappers for unsafe_*_user()

On Tue, Oct 28, 2025 at 10:32 AM Thomas Gleixner <tglx@...utronix.de> wrote:
> +
> +#define __put_kernel_nofault(dst, src, type, label)            \
> +do {                                                           \
> +       __label__ local_label;                                  \
> +       arch_get_kernel_nofault(dst, src, type, local_label);   \

Probably arch_put_kernel_nofault() instead?

> +       if (0) {                                                \
> +       local_label:                                            \
> +               goto label;                                     \
> +       }                                                       \
> +} while (0)


Regards;
Yann.