linux-kernel - Re: [git pull] x86 fixes

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Message-ID: <alpine.LFD.2.00.0901121145220.6528@localhost.localdomain>
Date:	Mon, 12 Jan 2009 11:47:13 -0800 (PST)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
cc:	Torsten Kaiser <just.for.lkml@...glemail.com>,
	Ingo Molnar <mingo@...e.hu>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [git pull] x86 fixes



On Mon, 12 Jan 2009, Pallipadi, Venkatesh wrote:
> +		if (strict_prot ||
> +		    (want_flags == _PAGE_CACHE_UC_MINUS &&
> +		     flags == _PAGE_CACHE_WB) ||
> +		    (want_flags == _PAGE_CACHE_WC &&
> +		     flags == _PAGE_CACHE_WB)) {

Please don't write code like this.

Do it as an inline function that returns true/false and has comments on 
what the hell is going on.

If a conditional doesn't fit on one line, it should generally be 
abstracted away into a readable function where the name explains what it 
does conceptually.

		Linus
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