linux-kernel - Re: smatch_scripts/whitespace

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Message-ID: <Pine.LNX.4.64.1003101537040.27249@ask.diku.dk>
Date:	Wed, 10 Mar 2010 15:38:10 +0100 (CET)
From:	Julia Lawall <julia@...u.dk>
To:	Dan Carpenter <error27@...il.com>
Cc:	linux-kernel@...r.kernel.org, gregkh@...e.de,
	kernel-janitors@...r.kernel.org, devel@...verdev.osuosl.org
Subject: Re: smatch_scripts/whitespace_only.sh

On Wed, 10 Mar 2010, Dan Carpenter wrote:

> On Wed, Mar 10, 2010 at 11:14:53AM +0100, Julia Lawall wrote:
> > On Wed, 10 Mar 2010, Dan Carpenter wrote:
> > 
> > > I wrote a script to check that a patch only changes white space.
> > > It compiles the files before and after the patch is applied and 
> > > verifies that they are the same.
> > > 
> > > You'll need to compile smatch:
> > > 	git pull git://repo.or.cz/smatch.git
> > > 	make
> > > 	cd /path/to/kernel/src/
> > > 	/path/to/smatch_scripts/whitespace_only.sh <patch>
> > > 
> > > Adding or removing parenthesis and curly braces counts as a code 
> > > change.  Changes to comments, #if 0, white space changes do not.
> > > 
> > > You can fix a lot of style violations if you limit yourself to 
> > > adding and removing tabs, spaces and new lines.  Then the next 
> > > patch could remove unneeded parenthesis.  It would be easier to
> > > audit that way instead of everything mixed together.
> > > 
> > > regards,
> > > dan carpenter
> > > 
> > > PS.  I feel really bad slagging the newbies trying to help.  
> > > Could we fix checkpatch.pl to not complain about line lengths?
> > 
> > I hope not...  Are newbies really put off by having to add a newline here 
> > and there?
> > 
> > julia
> > 
> 
> The problem is that newbies are only too happy to chop lines up into smaller 
> and smaller bits.  :P  I've seen situations where the actual author of the code
> broke up _his own_ perfectly reasonable code into tiny chunks just to satisfy 
> checkpatch.pl.
> 
> 				printk("blah blah blah blah"
> 						"blah blah"
> 						"blah");
> 
> It would be great if people dealt with checkpatch warnings by breaking
> things out into separate functions and eliminating indent levels but 
> that never happens.

Maybe checkpatch could be changed to not complain about > 80 characters 
when the line contains a string?

julia
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