linux-kernel - Re: [PATCH v4] checkpatch: debugfs

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Date:	Tue, 20 Nov 2012 14:47:42 +0000
From:	Andy Whitcroft <apw@...onical.com>
To:	Joe Perches <joe@...ches.com>
Cc:	Constantine Shulyupin <const@...eLinux.com>,
	linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org
Subject: Re: [PATCH v4] checkpatch: debugfs_remove() can take NULL

On Tue, Nov 20, 2012 at 06:43:49AM -0800, Joe Perches wrote:
> On Tue, 2012-11-20 at 14:29 +0000, Andy Whitcroft wrote:
> 
> > This all looks sensible, though we still have three blocks doing the
> > same thing.  How about we standardise this check into a single check,
> > generating the capacity from the matched name.
> []
> > diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> []
> > +			if ($line =~ /\b(kfree|usb_free_urb|debugfs_remove(?:_recursive)?)$expr/) {
> > +				my $func = $1;
> > +				my $func_capacity = "NEEDLESS_$1";
> > +
> > +				$func_capacity =~ s/(.$)/\U$1\E/;
> > +
> > +				WARN($func_capacity,
> > +				     "$func(NULL) is safe this check is probably not required\n" . $hereprev);
> 
> Perhaps just
> 				WARN("NEEDLESS_IF",

I would cirtainly be happy with that, I was trying to avoid changing the
capacity for the existing NEEDLESS_KFREE.  If compatibility there isn't
an issue then that makes life even simpler.

-apw
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