Re: Avoiding "unused variable" warnings

[Roman Zippel]

Hi,

On 13 Jul 2003, Alan Cox wrote:

> > No need for a macro, just do
> > 
> > 	(void) var_name;
> > 
> > It doesn't generate any code, and it shuts up the compiler.
> 
> It may do. The proper gcc thing is attribute unused. Both are dangerous
> as they hide when the variable becomes really unused

Function like macros, which throw away their arguments, can be dangerous. 
I had a funny bug like this:

	kunmap(*pagep++);

bye, Roman