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

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Date: Fri, 14 Jun 2024 13:20:04 -0700
From: Boqun Feng <boqun.feng@...il.com>
To: Mark Rutland <mark.rutland@....com>
Cc: 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>,	Gary Guo <gary@...yguo.net>,
	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,
	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 Fri, Jun 14, 2024 at 11:40:47AM +0100, Mark Rutland wrote:
[...]
> > +#gen_proto_order_variant(meta, pfx, name, sfx, order, atomic, ty, int, raw, arg...)
> > +gen_proto_order_variant()
> > +{
> > +	local meta="$1"; shift
> > +	local pfx="$1"; shift
> > +	local name="$1"; shift
> > +	local sfx="$1"; shift
> > +	local order="$1"; shift
> > +	local atomic="$1"; shift
> > +	local ty="$1"; shift
> > +	local int="$1"; shift
> > +	local raw="$1"; shift
> > +
> > +	local fn_name="${raw}${pfx}${name}${sfx}${order}"
> > +	local atomicname="${raw}${atomic}_${pfx}${name}${sfx}${order}"
> > +
> > +	local ret="$(gen_ret_type "${meta}" "${int}")"
> > +	local params="$(gen_params "${int}" $@)"
> > +	local args="$(gen_args "$@")"
> > +	local retstmt="$(gen_ret_stmt "${meta}")"
> > +
> > +cat <<EOF
> > +    /// See \`${atomicname}\`.
> > +    #[inline(always)]
> > +    pub fn ${fn_name}(&self${params}) ${ret}{
> > +        // SAFETY:\`self.0.get()\` is a valid pointer.
> > +        unsafe {
> > +            ${retstmt}${atomicname}(${args});
> > +        }
> > +    }
> > +EOF
> > +}
> 
> AFAICT the 'ty' argument (AtomicI32/AtomicI64) isn't used and can be
> removed.
> 

Good catch.

> Likewise for 'raw'.
> 
> > +
> > +cat << EOF
> > +// SPDX-License-Identifier: GPL-2.0
> > +
> > +//! Generated by $0
> > +//! DO NOT MODIFY THIS FILE DIRECTLY
> > +
> > +use super::*;
> > +use crate::bindings::*;
> > +
> > +impl AtomicI32 {
> > +EOF
> > +
> > +grep '^[a-z]' "$1" | while read name meta args; do
> > +	gen_proto "${meta}" "${name}" "atomic" "AtomicI32" "i32" "" ${args}
> 
> With 'ty' and 'raw' gone, this'd be:
> 
> 	gen_proto "${meta}" "${name}" "atomic" "i32" ${args}
> 
> > +done
> > +
> > +cat << EOF
> > +}
> > +
> > +impl AtomicI64 {
> > +EOF
> > +
> > +grep '^[a-z]' "$1" | while read name meta args; do
> > +	gen_proto "${meta}" "${name}" "atomic64" "AtomicI64" "i64" "" ${args}
> 
> With 'ty' and 'raw' gone, this'd be:
> 
> 	gen_proto "${meta}" "${name}" "atomic64" "i64" ${args}
> 

All fixed locally, thanks!

Regards,
Boqun

> Mark.
> 
> > +done
> > +
> > +cat << EOF
> > +}
> > +
> > +EOF
> > -- 
> > 2.45.2
> >