linux-kernel - Re: [RFC PATCH 2/5] unwind: Export unwind

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Message-ID: <2025071419-negligent-balcony-84c5@gregkh>
Date: Mon, 14 Jul 2025 15:26:47 +0200
From: Greg KH <gregkh@...uxfoundation.org>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: Christoph Hellwig <hch@...radead.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	linux-kernel@...r.kernel.org, Josh Poimboeuf <jpoimboe@...nel.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>, Jiri Olsa <jolsa@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrii Nakryiko <andrii@...nel.org>,
	Indu Bhagat <indu.bhagat@...cle.com>,
	"Jose E. Marchesi" <jemarch@....org>,
	Beau Belgrave <beaub@...ux.microsoft.com>,
	Jens Remus <jremus@...ux.ibm.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	tech-board-discuss@...ts.linuxfoundation.org
Subject: Re: [RFC PATCH 2/5] unwind: Export unwind_user symbol to GPL modules

On Mon, Jul 14, 2025 at 08:20:33AM -0400, Steven Rostedt wrote:
> On Mon, 14 Jul 2025 13:59:56 +0200
> Greg KH <gregkh@...uxfoundation.org> wrote:
> 
> > The maintainers of the subsystems in which the new code interacts with
> > are the reviewers, as always.  Again, nothing unusual here.
> 
> What subsystems does it interact with? It is an observer, it doesn't affect
> any subsystem. It's basically stand alone. It only needs to use the
> tracepoint infrastructure (which BTW, Matiheu is the maintainer of).
> 
> Just like perf and ftrace. They are stand alone subsystems where other
> subsystems may interact with them, but they don't really interact with
> anything else (besides the normal utilities like allocation of memory and
> such).
> 
> > 
> > > Have any suggestions for him, or do you just not care? But you are one of
> > > the gate keepers of EXPORT_SYMBOL_GPL() which affects him.  
> > 
> > This is not the issue at all, sorry Just submit it like normal.
> 
> So he could just send a thousand patch series that doesn't touch any other
> subsystem? It would have a diffstat that touches nothing but kernel/lttng,
> kernel/Makefile and kernel/Kconfig. Who's going to review it? Who's going
> to accept it?

Again, this is all things that we all know how to do and aren't new.
Get someone in a subsystem relevant to it to review a patch series that
adds the needed files to the kernel in a way that they can actually be
reviewed.

As it seems that we do have other tracing/perf developers already, start
with them and go forward to see what they say.

good luck!

greg k-h