linux-kernel - Re: [RFC 2/2] rust: sync: Add atomic support

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Date: Thu, 13 Jun 2024 19:22:54 +0200
From: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To: Boqun Feng <boqun.feng@...il.com>
Cc: Gary Guo <gary@...yguo.net>, rust-for-linux@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org, 
	llvm@...ts.linux.dev, Miguel Ojeda <ojeda@...nel.org>, 
	Alex Gaynor <alex.gaynor@...il.com>, Wedson Almeida Filho <wedsonaf@...il.com>, 
	Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
	Benno Lossin <benno.lossin@...ton.me>, Andreas Hindborg <a.hindborg@...sung.com>, 
	Alice Ryhl <aliceryhl@...gle.com>, Alan Stern <stern@...land.harvard.edu>, 
	Andrea Parri <parri.andrea@...il.com>, Will Deacon <will@...nel.org>, 
	Peter Zijlstra <peterz@...radead.org>, Nicholas Piggin <npiggin@...il.com>, 
	David Howells <dhowells@...hat.com>, Jade Alglave <j.alglave@....ac.uk>, 
	Luc Maranget <luc.maranget@...ia.fr>, "Paul E. McKenney" <paulmck@...nel.org>, 
	Akira Yokosawa <akiyks@...il.com>, Daniel Lustig <dlustig@...dia.com>, 
	Joel Fernandes <joel@...lfernandes.org>, Nathan Chancellor <nathan@...nel.org>, 
	Nick Desaulniers <ndesaulniers@...gle.com>, kent.overstreet@...il.com, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, elver@...gle.com, 
	Mark Rutland <mark.rutland@....com>, Thomas Gleixner <tglx@...utronix.de>, 
	Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, 
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org, 
	"H. Peter Anvin" <hpa@...or.com>, Catalin Marinas <catalin.marinas@....com>, torvalds@...ux-foundation.org, 
	linux-arm-kernel@...ts.infradead.org, linux-fsdevel@...r.kernel.org, 
	Trevor Gross <tmgross@...ch.edu>, dakr@...hat.com
Subject: Re: [RFC 2/2] rust: sync: Add atomic support

On Thu, Jun 13, 2024 at 6:31 PM Boqun Feng <boqun.feng@...il.com> wrote:
>
> So let's start with some basic and simple until we really have a need
> for generic `Atomic<T>`. Thoughts?

I don't want to delay this, but using generics would be more flexible,
right? e.g. it could allow us to have atomics of, say, newtypes, if
that were to be useful.

Is there a particular disadvantage of using the generics? The two
cases you mentioned would just be written explicitly, right?

One disadvantage would be that they are different from the Rust
standard library ones, e.g. in case we wanted third-party code to use
them, but could be provided if needed later on.

Cheers,
Miguel