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Date:   Wed, 21 Oct 2020 08:44:56 -0700
From:   "Paul E. McKenney" <paulmck@kernel.org>
To:     Steven Rostedt <rostedt@goodmis.org>
Cc:     Zong Li <zong.li@sifive.com>, josh@joshtriplett.org,
        mathieu.desnoyers@efficios.com, jiangshanlai@gmail.com,
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        tglx@linutronix.de, paul.walmsley@sifive.com,
        palmerdabbelt@google.com, guoren@kernel.org, atishp@atishpatra.org,
        mhiramat@kernel.org, greentime.hu@sifive.com,
        colin.king@canonical.com, rcu@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org
Subject: Re: [PATCH] stop_machine: Mark functions as notrace
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On Wed, Oct 21, 2020 at 10:15:22AM -0400, Steven Rostedt wrote:
> On Wed, 21 Oct 2020 10:12:16 -0400
> Steven Rostedt <rostedt@goodmis.org> wrote:
> 
> > > Fixes: 4ecf0a43e729 ("processor: get rid of cpu_relax_yield")
> > > Fixes: 366237e7b083 ("stop_machine: Provide RCU quiescent state in
> > > multi_cpu_stop()")  
> > 
> > I really do not like to add "notrace" to core functions because a single
> > architecture has issues with it. Why does RISCV have problems with these
> > functions but no other architecture does?
> > 
> > NACK from me until it is shown that these are issues for a broader set of
> > architectures.
> 
> After looking at the two above fixes, I take back my NACK ;-)
> 
> One of them duplicates an already notraced function, so that looks fine.
> The other makes a static function global, which could cause issues as well.
> 
> After further review:
> 
> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

If someone else would like to take this:

Acked-by: Paul E. McKenney <paulmck@kernel.org>

Or let me know if you would like me to take it, target v5.11.

							Thanx, Paul