linux-kernel - Re: [PATCH V2 3/3] checkpatch: Emit an warning when floating point values are used

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Date:	Tue, 6 Nov 2012 15:36:25 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Joe Perches <joe@...ches.com>
Cc:	Andy Whitcroft <apw@...onical.com>,
	Adil Mujeeb <mujeeb.adil@...il.com>,
	Pavel Machek <pavel@....cz>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2 3/3] checkpatch: Emit an warning when floating point
 values are used

On Thu,  1 Nov 2012 00:12:18 -0700
Joe Perches <joe@...ches.com> wrote:

> Linux kernel doesn't like floating point, say so.
> 
> ...
>
> --- a/scripts/checkpatch.pl
> +++ b/scripts/checkpatch.pl
> @@ -2332,6 +2332,13 @@ sub process {
>  			     "do not add new typedefs\n" . $herecurr);
>  		}
>  
> +# check for floating point constants
> +
> +		if ($line =~ /\b$Float\b/) {
> +			WARN("KERNEL_FLOAT",
> +			     "Floating point is not supported in linux kernel source\n" . $herecurr);
> +		}
> +
>  # * goes on variable not on type
>  		# (char*[ const])
>  		while ($line =~ m{(\($NonptrType(\s*(?:$Modifier\b\s*|\*\s*)+)\))}g) {

The earlier review comments were not addressed.

In particular, I don't see a problem with people doing

	int foo = 1.1 * 2.2;
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