linux-kernel - Re: [PATCH 1/5] objtool/rust: add one more `noreturn` Rust function for Rust 1.87.0

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Message-ID: <i7he6uxzzna7abu46xl3la5ix5t7psodns7k44bllgcq6lusty@wlcjvp7rhoo3>
Date: Thu, 15 May 2025 15:16:11 -0700
From: Josh Poimboeuf <jpoimboe@...nel.org>
To: Timur Tabi <ttabi@...dia.com>
Cc: "dakr@...nel.org" <dakr@...nel.org>, 
	"a.hindborg@...nel.org" <a.hindborg@...nel.org>, "ojeda@...nel.org" <ojeda@...nel.org>, 
	"boqun.feng@...il.com" <boqun.feng@...il.com>, "patches@...ts.linux.dev" <patches@...ts.linux.dev>, 
	"stable@...r.kernel.org" <stable@...r.kernel.org>, "tmgross@...ch.edu" <tmgross@...ch.edu>, 
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "alex.gaynor@...il.com" <alex.gaynor@...il.com>, 
	"benno.lossin@...ton.me" <benno.lossin@...ton.me>, John Hubbard <jhubbard@...dia.com>, 
	"rust-for-linux@...r.kernel.org" <rust-for-linux@...r.kernel.org>, "bjorn3_gh@...tonmail.com" <bjorn3_gh@...tonmail.com>, 
	"peterz@...radead.org" <peterz@...radead.org>, Joel Fernandes <joelagnelf@...dia.com>, 
	"aliceryhl@...gle.com" <aliceryhl@...gle.com>, "gary@...yguo.net" <gary@...yguo.net>, 
	Alexandre Courbot <acourbot@...dia.com>, Alistair Popple <apopple@...dia.com>
Subject: Re: [PATCH 1/5] objtool/rust: add one more `noreturn` Rust function
 for Rust 1.87.0

On Thu, May 15, 2025 at 07:06:10PM +0000, Timur Tabi wrote:
> On Thu, 2025-05-15 at 09:18 -0700, Josh Poimboeuf wrote:
> > > Since I build with LLVM=1, I'm assuming the answer is 18.1.3
> > 
> > I'm not able to recreate, can you run with OBJTOOL_VERBOSE=1 and paste
> > the output?
> 
> You probably can't repro because it includes code that hasn't been merged upstream yet.  Try this:
> 
> https://github.com/ttabi/linux/commits/alex
> 
>   CHK     kernel/kheaders_data.tar.xz
> drivers/gpu/nova-core/nova_core.o: warning: objtool:
> _RNvXsa_NtCs8S3917Wilyo_9nova_core5vbiosNtB5_14PciAtBiosImageINtNtCsgK88DPai1lC_4core7convert7TryFro

I'm not yet qualified to look at the rust warning, I was actually
wondering about the C one you reported:

  drivers/media/pci/solo6x10/solo6x10-tw28.o: error: objtool: tw28_set_ctrl_val() falls through to next function tw28_get_ctrl_val()

-- 
Josh