linux-kernel - Re: Fix empty macros in acpi.

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Date:	Sun, 22 Jul 2007 00:55:16 -0400
From:	Len Brown <lenb@...nel.org>
To:	Dave Jones <davej@...hat.com>, Al Viro <viro@....linux.org.uk>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: Fix empty macros in acpi.

On Tuesday 03 July 2007 01:44, Dave Jones wrote:
> On Tue, Jul 03, 2007 at 01:22:47AM -0400, Len Brown wrote:
> 
>  > whelp, it seems that the reason for this patch is this:
>  > 
>  > #define DBG()
>  > 
>  > if(...)
>  > 	DBG();
>  > next_c_statement
>  > 
>  > which turns into
>  > if(...) ;
>  > next_c_statement
>  > 
>  > But since there is an intervening ';', this code is still functionally correct
>  > and a decent compiler will delete the test altogether, yes?
> 
> Right, gcc does generate the correct code.
> 
>  > So is there some real problem here that I missed,
>  > or is this to make some code-checking tool that I don't have happy?
> 
> Out of curiousity, I thought I'd see what was lurking in a -Wextra
> build a while back. It's 99.9% noise, but a lot of it is trivial stuff
> like this.

okay, i'll apply it to reduce the noise.

thanks,
-Len
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