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Date:   Mon, 7 May 2018 17:05:41 -0400 (EDT)
From:   Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
To:     Joel Fernandes <joelaf@google.com>
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        "Joel Fernandes (Google)" <joel@joelfernandes.org>,
        rostedt <rostedt@goodmis.org>,
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        Tom Zanussi <tom.zanussi@linux.intel.com>,
        Namhyung Kim <namhyung@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Boqun Feng <boqun.feng@gmail.com>,
        "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
        fweisbec <fweisbec@gmail.com>,
        Randy Dunlap <rdunlap@infradead.org>,
        Masami Hiramatsu <mhiramat@kernel.org>,
        kbuild test robot <fengguang.wu@intel.com>,
        baohong liu <baohong.liu@intel.com>,
        vedang patel <vedang.patel@intel.com>,
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In-Reply-To: <20180507204143.13061-5-joelaf@google.com>
References: <20180507204143.13061-1-joelaf@google.com> <20180507204143.13061-5-joelaf@google.com>
Subject: Re: [PATCH RFC v6 4/5] tracepoint: Make rcuidle tracepoint callers
 use SRCU
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Thread-Topic: tracepoint: Make rcuidle tracepoint callers use SRCU
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----- On May 7, 2018, at 4:41 PM, Joel Fernandes joelaf@google.com wrote:
[...]
> +extern struct srcu_struct tracepoint_srcu;
> +
> extern int
> tracepoint_probe_register(struct tracepoint *tp, void *probe, void *data);
> extern int
> @@ -77,6 +80,9 @@ int unregister_tracepoint_module_notifier(struct
> notifier_block *nb)
>  */
> static inline void tracepoint_synchronize_unregister(void)
> {
> +#ifdef CONFIG_TRACEPOINTS
> +	synchronize_srcu(&tracepoint_srcu);
> +#endif
> 	synchronize_sched();

Why is this ifdef needed ?

Thanks,

Mathieu

-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com