linux-kernel - Re: [PATCH 5/6] x86: replace cpu_**_mask() with topology_**

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Message-ID: <20150502063355.GA25303@gmail.com>
Date:	Sat, 2 May 2015 08:33:55 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Bartosz Golaszewski <bgolaszewski@...libre.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	Guenter Roeck <linux@...ck-us.net>,
	Jean Delvare <jdelvare@...e.de>,
	Fenghua Yu <fenghua.yu@...el.com>,
	Benoit Cousson <bcousson@...libre.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCH 5/6] x86: replace cpu_**_mask() with topology_**_cpumask()


* Bartosz Golaszewski <bgolaszewski@...libre.com> wrote:

> The former duplicate the functionalities of the latter but are neither
> documented nor arch-independent.

>  	if (!has_mp) {
> -		cpumask_set_cpu(cpu, cpu_sibling_mask(cpu));
> +		cpumask_set_cpu(cpu, topology_thread_cpumask(cpu));
>  		cpumask_set_cpu(cpu, cpu_llc_shared_mask(cpu));

So why does topology.h invent a new name for 'sibling CPUs'?

At least in the scheduling context, 'sibling' is the term we are using 
in most places in the scheduler - try 'git grep sibling kernel/sched/'.

'thread' is a bad name anyway for a CPU, even if we didn't have an 
existing term for it.

So please rename topology_thread_cpumask to topology_sibling_cpumask 
to not replace one inconsistency for another one ...

Thanks,

	Ingo
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