linux-kernel - Re: [PATCH v13 2/5] rust: support formatting of foreign types

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAJ-ks9mvLEPLMJS6E_UPc4bkRN1q09zYC_oL_pZ=E_Ff161USA@mail.gmail.com>
Date: Thu, 3 Jul 2025 14:57:15 -0400
From: Tamir Duberstein <tamird@...il.com>
To: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
Cc: Benno Lossin <lossin@...nel.org>, Michal Rostecki <vadorovsky@...tonmail.com>, 
	Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>, 
	Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>, 
	Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
	Andreas Hindborg <a.hindborg@...nel.org>, Alice Ryhl <aliceryhl@...gle.com>, 
	Trevor Gross <tmgross@...ch.edu>, Brendan Higgins <brendan.higgins@...ux.dev>, 
	David Gow <davidgow@...gle.com>, Rae Moar <rmoar@...gle.com>, 
	Danilo Krummrich <dakr@...nel.org>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
	Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, "Rafael J. Wysocki" <rafael@...nel.org>, 
	Luis Chamberlain <mcgrof@...nel.org>, Russ Weight <russ.weight@...ux.dev>, 
	FUJITA Tomonori <fujita.tomonori@...il.com>, Rob Herring <robh@...nel.org>, 
	Saravana Kannan <saravanak@...gle.com>, Peter Zijlstra <peterz@...radead.org>, 
	Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>, Waiman Long <longman@...hat.com>, 
	Nathan Chancellor <nathan@...nel.org>, Nick Desaulniers <nick.desaulniers+lkml@...il.com>, 
	Bill Wendling <morbo@...gle.com>, Justin Stitt <justinstitt@...gle.com>, Andrew Lunn <andrew@...n.ch>, 
	Heiner Kallweit <hkallweit1@...il.com>, Russell King <linux@...linux.org.uk>, 
	"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Bjorn Helgaas <bhelgaas@...gle.com>, 
	Arnd Bergmann <arnd@...db.de>, Jens Axboe <axboe@...nel.dk>, 
	Krzysztof Wilczyński <kwilczynski@...nel.org>, 
	Dave Ertman <david.m.ertman@...el.com>, Ira Weiny <ira.weiny@...el.com>, 
	Leon Romanovsky <leon@...nel.org>, Breno Leitao <leitao@...ian.org>, 
	Viresh Kumar <viresh.kumar@...aro.org>, Michael Turquette <mturquette@...libre.com>, 
	Stephen Boyd <sboyd@...nel.org>, rust-for-linux@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org, 
	kunit-dev@...glegroups.com, dri-devel@...ts.freedesktop.org, 
	netdev@...r.kernel.org, devicetree@...r.kernel.org, llvm@...ts.linux.dev, 
	linux-pci@...r.kernel.org, nouveau@...ts.freedesktop.org, 
	linux-block@...r.kernel.org, linux-pm@...r.kernel.org, 
	linux-clk@...r.kernel.org
Subject: Re: [PATCH v13 2/5] rust: support formatting of foreign types

On Thu, Jul 3, 2025 at 12:26 PM Miguel Ojeda
<miguel.ojeda.sandonis@...il.com> wrote:
>
> On Thu, Jul 3, 2025 at 3:56 PM Tamir Duberstein <tamird@...il.com> wrote:
> >
> > Can you help me understand why? The changes you ask to be separated
> > would all be in different files, so why would separate commits make it
> > easier to review?
>
> By the way, if we are talking about splitting, it is easier to land
> patches that can go independently into different subsystems and
> avoiding flag day changes (or making those as small as possible), i.e.
> ideally being able to land big changes across more than one kernel
> cycle.

Understood, though in this case I don't see how it's workable. The
formatting macros can either wrap in fmt::Adapter (and thus require
kernel::fmt::Display) or not (and thus require core::fmt::Display),
but I don't see how they can work in a mixed world. We can't have half
the subsystems implement core::fmt::Display and the other half
implement kernel::fmt::Display.