Received-SPF: pass (google.com: domain of linux-kernel+bounces-112459-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:40f1:3f00::1 as permitted sender) client-ip=2604:1380:40f1:3f00::1;
Precedence: bulk
MIME-Version: 1.0
References: <20240322233838.868874-1-boqun.feng@gmail.com> <20240322233838.868874-2-boqun.feng@gmail.com>
 <068a5983-8216-48a5-9eb5-784a42026836@lunn.ch> <CAH5fLggdVDccDwBa3z+3YfjKFLegh7ZvcSzfhnEbAGSk=THKrw@mail.gmail.com>
 <497668ec-c2d5-4cb4-9c2d-8e6f7129a42e@lunn.ch>
In-Reply-To: <497668ec-c2d5-4cb4-9c2d-8e6f7129a42e@lunn.ch>
From: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Date: Sat, 23 Mar 2024 20:09:57 +0100
Message-ID: <CANiq72m4n2B0K5t1ZESMcL_k=Wgttuwd8=THBbOYYPq_D+4hsg@mail.gmail.com>
Subject: Re: [WIP 1/3] rust: Introduce atomic module
To: Andrew Lunn <andrew@lunn.ch>
Cc: Alice Ryhl <aliceryhl@google.com>, Boqun Feng <boqun.feng@gmail.com>, 
	rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, 
	linux-arch@vger.kernel.org, llvm@lists.linux.dev, 
	Miguel Ojeda <ojeda@kernel.org>, Alex Gaynor <alex.gaynor@gmail.com>, 
	Wedson Almeida Filho <wedsonaf@gmail.com>, Gary Guo <gary@garyguo.net>, 
	=?UTF-8?Q?Bj=C3=B6rn_Roy_Baron?= <bjorn3_gh@protonmail.com>, 
	Benno Lossin <benno.lossin@proton.me>, Andreas Hindborg <a.hindborg@samsung.com>, 
	Alan Stern <stern@rowland.harvard.edu>, Andrea Parri <parri.andrea@gmail.com>, 
	Will Deacon <will@kernel.org>, Peter Zijlstra <peterz@infradead.org>, 
	Nicholas Piggin <npiggin@gmail.com>, David Howells <dhowells@redhat.com>, 
	Jade Alglave <j.alglave@ucl.ac.uk>, Luc Maranget <luc.maranget@inria.fr>, 
	"Paul E. McKenney" <paulmck@kernel.org>, Akira Yokosawa <akiyks@gmail.com>, 
	Daniel Lustig <dlustig@nvidia.com>, Joel Fernandes <joel@joelfernandes.org>, 
	Nathan Chancellor <nathan@kernel.org>, Nick Desaulniers <ndesaulniers@google.com>, kent.overstreet@gmail.com, 
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>, elver@google.com, 
	Mark Rutland <mark.rutland@arm.com>, Thomas Gleixner <tglx@linutronix.de>, 
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>, 
	Dave Hansen <dave.hansen@linux.intel.com>, x86@kernel.org, 
	"H. Peter Anvin" <hpa@zytor.com>, Catalin Marinas <catalin.marinas@arm.com>, torvalds@linux-foundation.org, 
	linux-arm-kernel@lists.infradead.org, linux-fsdevel@vger.kernel.org
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

On Sat, Mar 23, 2024 at 3:10=E2=80=AFPM Andrew Lunn <andrew@lunn.ch> wrote:
>
> Just looking down the road a bit, are there other features in the
> standard library which are not applicable to Linux kernel space?
> Ideally we want a solution not just for atomics but a generic solution
> which can disable a collection of features? Maybe one by one?

We requested a few of these in the past for both `core` [1] and
`alloc` [2], and we got some which we use (see the `cfg(no_*)`s). It
is what we called "modularization of `core`" too.

[1] https://github.com/Rust-for-Linux/linux/issues/514
[2] https://github.com/Rust-for-Linux/linux/issues/408

Cheers,
Miguel