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From:   Uladzislau Rezki <urezki@gmail.com>
Date:   Wed, 20 May 2020 20:50:05 +0200
To:     Joel Fernandes <joel@joelfernandes.org>
Cc:     Peter Zijlstra <peterz@infradead.org>,
        Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        linux-kernel@vger.kernel.org, Ingo Molnar <mingo@kernel.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        Will Deacon <will@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        "Paul E . McKenney" <paulmck@kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Lai Jiangshan <jiangshanlai@gmail.com>,
        Josh Triplett <josh@joshtriplett.org>,
        Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
        rcu@vger.kernel.org
Subject: Re: [PATCH 3/8] srcu: Use local_lock() for per-CPU struct srcu_data
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>
> I actually found it in RT 4.4 kernel, I thought this was also on newer RT
> kernels as well (is that not true anymore?). But yes it was exactly what
> Peter said.
> 
I see it also in 5.6.4 linut-rt-devel:

<snip>
#ifdef CONFIG_PREEMPT_RT
...
# define get_local_ptr(var) ({ \
 migrate_disable(); \
 this_cpu_ptr(var); })
...
<snip>

--
Vlad Rezki