linux-kernel - Re: checkpatch problem

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Date:	Thu, 23 Sep 2010 19:54:29 +0100
From:	David Howells <dhowells@...hat.com>
To:	Joe Perches <joe@...ches.com>
Cc:	dhowells@...hat.com, Andy Whitcroft <apw@...onical.com>,
	linux-kernel@...r.kernel.org
Subject: Re: checkpatch problem

Joe Perches <joe@...ches.com> wrote:

> Exactly right.  Andy has a version in his testing directory
> that fixes this #define run-on block and speeds up checkpatch
> runtime rather a lot for certain files like .h files that have
> nothing but #defines.
> 
> Try applying my patch to this newer version:
> 
> http://www.kernel.org/pub/linux/kernel/people/apw/checkpatch/checkpatch.pl-testing

It still doesn't work.  In fact, I'm seeing more "Logging function has
unnecessary whitespace before a newline" warnings, such as on this:

		printk(KERN_ERR
		       "BUG: CPU#%d started up but did not get a callout!\n",
		       cpu);

where I wasn't before.

I am still getting them on #defines:

-:6841: WARNING: Logging function has unnecessary whitespace before a newline
#6841: FILE: arch/mn10300/kernel/smp.c:57:
+#define Dprintk(fmt, ...) printk(KERN_DEBUG fmt, ##__VA_ARGS__)

Also, --emacs mode appears to be broken.  It sticks something like "#7768: "
on the front of the filename encoded in the patch:

-:7768: WARNING: Logging function has unnecessary whitespace before a newline
#7768: FILE: arch/mn10300/kernel/smp.c:984:
+		printk(KERN_ERR

which emacs interprets as a filename.  Without that, emacs happily strips off
the 'FILE: ' prefix and uses the filename and line number.  I don't
particularly care about the line number in the patch: I'm not editing the
patch - I'm editing the file contributing to the patch.

David
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