linux-kernel - Re: On trace_*_rcuidle functions in modules

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Message-ID: <20200415224056.GO2483@worktop.programming.kicks-ass.net>
Date:   Thu, 16 Apr 2020 00:40:56 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     John Stultz <john.stultz@...aro.org>, paulmck@...nel.org,
        Josh Triplett <josh@...htriplett.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Saravana Kannan <saravanak@...gle.com>,
        Todd Kjos <tkjos@...gle.com>, Stephen Boyd <sboyd@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: On trace_*_rcuidle functions in modules

On Wed, Apr 15, 2020 at 04:14:24PM -0400, Steven Rostedt wrote:
> Which was added because the rcuidle variant called RCU code that was not
> exported either. Which would have the same issue now as
> rcu_irq_exit_irqson() is also not exported. Which would be needed.

Keeping all RCU_NONIDLE code in the core kernel allows us to eventually
clean it all up. Allowing it to escape into modules makes that ever so
much harder :/