linux-kernel - Re: [PATCH] sched/idle: Drop !! while calculating 'broadcast'

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Message-ID: <20140624080347.GL13930@laptop.programming.kicks-ass.net>
Date:	Tue, 24 Jun 2014 10:03:47 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	mingo@...hat.com, linux-kernel@...r.kernel.org,
	linaro-kernel@...ts.linaro.org
Subject: Re: [PATCH] sched/idle: Drop !! while calculating 'broadcast'

On Tue, Jun 24, 2014 at 10:01:01AM +0530, Viresh Kumar wrote:
> We don't need 'broadcast' to be set to 'zero or one', but to 'zero or non-zero'
> and so the extra operation to convert it to 'zero or one' can be skipped.
> 
> Also change type of 'broadcast' to unsigned int, i.e. type of
> drv->states[*].flags.

All true; but does it change anything? That is, does your compiler
generate better code because of this?
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