linux-kernel - Re: [PATCH -v2] x86: allocate cpumask during check irq vectors

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Message-ID: <20140126202749.GA10254@gmail.com>
Date:	Sun, 26 Jan 2014 21:27:49 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Prarit Bhargava <prarit@...hat.com>,
	Yinghai Lu <yinghai@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -v2] x86: allocate cpumask during check irq vectors


* H. Peter Anvin <hpa@...or.com> wrote:

> s/global/static/, with a big loud comment why it is okay.

It would be a global no matter which form we use, but for 
maintainability reasons I generally prefer a static put right before 
the function that uses it:

	static cpumask_t mask;

	static func(...)
	{
	}

That makes it really apparent that it's a global - statics are easily 
missed when hiding amongst local variables.

Thanks,

	Ingo
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