linux-kernel - Re: [PATCH net-next] vhost: use "checked" versions of get_user() and put

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Message-ID: <CAHk-=wiEg3yO5znyPD+soCkVi_emP=wHrRZk2sv4VS768S3a2g@mail.gmail.com>
Date: Wed, 26 Nov 2025 13:45:45 -0800
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: Jon Kohler <jon@...anix.com>
Cc: Arnd Bergmann <arnd@...db.de>, Jason Wang <jasowang@...hat.com>, 
	"Michael S. Tsirkin" <mst@...hat.com>, Eugenio Pérez <eperezma@...hat.com>, 
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>, 
	"virtualization@...ts.linux.dev" <virtualization@...ts.linux.dev>, Netdev <netdev@...r.kernel.org>, 
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Borislav Petkov <bp@...en8.de>, 
	Sean Christopherson <seanjc@...gle.com>, 
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, Russell King <linux@...linux.org.uk>, 
	Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, 
	Krzysztof Kozlowski <krzk@...nel.org>, Alexandre Belloni <alexandre.belloni@...tlin.com>, 
	Linus Walleij <linus.walleij@...aro.org>, Drew Fustini <fustini@...nel.org>
Subject: Re: [PATCH net-next] vhost: use "checked" versions of get_user() and put_user()

On Wed, 26 Nov 2025 at 13:43, Jon Kohler <jon@...anix.com> wrote:
>
> Linus mentioned he might get into the mix and do a bulk
> change and kill the whole thing once and for all, so I’m
> simply trying to help knock an incremental amount of work
> off the pile in advance of that (and reap some performance
> benefits at the same time, at least on the x86 side).

So I'm definitely going to do some bulk conversion at some point, but
honestly, I'll be a lot happier if most users already self-converted
before that, and I only end up doing a "convert unmaintained old code
that nobody really cares about".

                  Linus