linux-kernel - Re: [PATCH] arm64: replace read_lock to rcu lock in call_step

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Message-ID: <20160209100758.69d9006f@gandalf.local.home>
Date:	Tue, 9 Feb 2016 10:07:58 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Will Deacon <will.deacon@....com>
Cc:	Yang Shi <yang.shi@...aro.org>, catalin.marinas@....com,
	bigeasy@...utronix.de, linux-kernel@...r.kernel.org,
	linux-rt-users@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linaro-kernel@...ts.linaro.org
Subject: Re: [PATCH] arm64: replace read_lock to rcu lock in call_step_hook

On Tue, 9 Feb 2016 14:54:26 +0000
Will Deacon <will.deacon@....com> wrote:


> Acked-by: Will Deacon <will.deacon@....com>

Will,

The patch looks good to me. Do you want to take it through your tree?

It benefits mainline too as a rcu_read_lock() is more efficient than
rwlocks. Although I will say this is a slow path anyway.

-- Steve