linux-kernel - Re: [PATCH] tracing/perf: Move rcu_irq_enter/exit

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Message-ID: <20200211111651.668a9506@gandalf.local.home>
Date:   Tue, 11 Feb 2020 11:16:51 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        "Joel Fernandes (Google)" <joel@...lfernandes.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Josh Triplett <josh@...htriplett.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Lai Jiangshan <jiangshanlai@...il.com>
Subject: Re: [PATCH] tracing/perf: Move rcu_irq_enter/exit_irqson() to perf
 trace point hook

On Tue, 11 Feb 2020 16:29:45 +0100
Peter Zijlstra <peterz@...radead.org> wrote:

> > | 		ftrace_nmi_enter();				\
> > 
> > !notrace !!!

Note, all inline is "notrace" by default, and ftrace_nmi_enter() is
inline.

in include/linux/compiler_types.h:

#if !defined(CONFIG_OPTIMIZE_INLINING)
#define inline inline __attribute__((__always_inline__)) __gnu_inline \
	__inline_maybe_unused notrace
#else
#define inline inline                                    __gnu_inline \
	__inline_maybe_unused notrace
#endif

-- Steve