linux-kernel - Re: Merging of completely unreviewed drivers

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Message-ID: <Pine.LNX.4.64.0802231628590.21077@fbirervta.pbzchgretzou.qr>
Date:	Sat, 23 Feb 2008 16:31:35 +0100 (CET)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	Ray Lee <ray-lk@...rabbit.org>
cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	David Newall <davidn@...idnewall.com>,
	Krzysztof Halasa <khc@...waw.pl>,
	Adrian Bunk <bunk@...nel.org>,
	Roland Dreier <rdreier@...co.com>,
	Glenn Streiff <gstreiff@...effect.com>,
	Faisal Latif <flatif@...effect.com>,
	linux-kernel@...r.kernel.org, general@...ts.openfabrics.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg Kroah-Hartman <greg@...ah.com>
Subject: Re: Merging of completely unreviewed drivers

On Feb 21 2008 22:37, Ray Lee wrote:
>On Thu, Feb 21, 2008 at 7:13 PM, Linus Torvalds
><torvalds@...ux-foundation.org> wrote:
>>  So I'd be happier with warnings about deep indentation (but how do you
>>  count it? Will people then try to fake things out by using 4-space indents
>>  and then "deep" indentations will look like just a couple of tabs?)
>
>I suspect that 90% of the cases that people really care about would
>get caught successfully just by counting brace depth.
>
>ie, by looking at { { {} {} {{{}{}}} } } I bet you can tell me which
>section should have been pulled out into a separate routine.

Not only that. By clever branch factoring, you can possibly get yourself
rid of lots of deep levels. As in:

static void blah(void)
{
	if (foo) {
		bar;
		bar2;
	} else {
		if (this) {
			that;
			that2;
		} else {
			bad day;
			bad day2;
		}
	}
}

xfrmd:

static void blah(void)
{
	if (foo) {
		bar;
		bar2;
		return;
	}
	if (this) {
		that;
		that2;
		return;
	}
	/* yay, got rid of two levels of indent! */
	good day;
	good day2;
}

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