linux-kernel - Re: [patch 1/3] sched: use jump labels to reduce overhead when bandwidth control is inactive

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Message-ID: <1320744378.2244.5.camel@twins>
Date:	Tue, 08 Nov 2011 10:26:18 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Paul Turner <pjt@...gle.com>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>
Subject: Re: [patch 1/3] sched: use jump labels to reduce overhead when
 bandwidth control is inactive

On Mon, 2011-11-07 at 20:26 -0800, Paul Turner wrote:
> +static void account_cfs_bandwidth_used(int enabled, int was_enabled)
> +{
> +       /* only need to count groups transitioning between enabled/!enabled */
> +       if (enabled && !was_enabled)
> +               jump_label_inc(&__cfs_bandwidth_used);
> +       else if (!enabled && was_enabled)
> +               jump_label_dec(&__cfs_bandwidth_used);
> +} 

Can't you use jump_label_enabled(&__cfs_bandwidth_used) to was_enabled ?
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