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Date:   Fri, 11 Feb 2022 16:17:50 +0100
From:   Frederic Weisbecker <frederic@kernel.org>
To:     "Paul E. McKenney" <paulmck@kernel.org>
Cc:     rcu@vger.kernel.org, linux-kernel@vger.kernel.org,
        kernel-team@fb.com, rostedt@goodmis.org,
        Yury Norov <yury.norov@gmail.com>
Subject: Re: [PATCH rcu 9/9] rcu: Replace cpumask_weight with cpumask_empty
 where appropriate
Message-ID: <20220211151750.GC588079@lothringen>
References: <20220204230751.GA4193671@paulmck-ThinkPad-P17-Gen-1>
 <20220204230805.4193767-9-paulmck@kernel.org>
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On Fri, Feb 04, 2022 at 03:08:05PM -0800, Paul E. McKenney wrote:
> From: Yury Norov <yury.norov@gmail.com>
> 
> In some places, RCU code calls cpumask_weight() to check if any bit of a
> given cpumask is set. We can do it more efficiently with cpumask_empty()
> because cpumask_empty() stops traversing the cpumask as soon as it finds
> first set bit, while cpumask_weight() counts all bits unconditionally.
> 
> Signed-off-by: Yury Norov <yury.norov@gmail.com>
> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

Acked-by: Frederic Weisbecker <frederic@kernel.org>