linux-kernel - Re: linux-next: build failure after merge of the ftrace tree

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Message-ID: <CAH5fLgj6zSDH6Oe3oqfE7F+NQSgSLxh8x7X3ewrrDAdOHOh0YA@mail.gmail.com>
Date: Fri, 8 Nov 2024 16:09:33 +0100
From: Alice Ryhl <aliceryhl@...gle.com>
To: Steven Rostedt <rostedt@...dmis.org>, Stephen Rothwell <sfr@...b.auug.org.au>
Cc: Masami Hiramatsu <mhiramat@...nel.org>, 
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, 
	Linux Next Mailing List <linux-next@...r.kernel.org>, 
	rust-for-linux <rust-for-linux@...r.kernel.org>, Miguel Ojeda <ojeda@...nel.org>
Subject: Re: linux-next: build failure after merge of the ftrace tree

On Fri, Nov 8, 2024 at 3:59 PM Steven Rostedt <rostedt@...dmis.org> wrote:
>
> On Fri, 8 Nov 2024 15:21:49 +1100
> Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> > Hi all,
> >
> > After merging the ftrace tree, today's linux-next build (x86_64
> > allmodconfig) failed like this:
> >
> > ERROR: modpost: missing MODULE_LICENSE() in samples/rust/rust_print_events.o
> > ERROR: modpost: "__tracepoint_rust_sample_loaded" [samples/rust/rust_print.ko] undefined!
> > ERROR: modpost: "rust_do_trace_rust_sample_loaded" [samples/rust/rust_print.ko] undefined!
> >
> > Caused by commit
> >
> >   91d39024e1b0 ("rust: samples: add tracepoint to Rust sample")
>
> Alice,
>
> Can you send a patch to fix this?

I'm working on it as we speak, but I haven't figured out how to
reproduce the problem yet. Using allmodconfig builds fine for me. Any
ideas?

Stephen, is there any more information you can share about this? What
versions of rustc, bindgen, and clang are you using?

Alice