warning when a function's address is tested?

[Jeff Sturm]

On Sun, 12 Oct 2003, Andrew Morton wrote:
> -	if (current_is_kswapd)
> +	if (current_is_kswapd())
>
> It was there for a year.  It is a fairly easy mistake to make, and it would
> be nice if the compiler could generate a warning.  I don't think there are
> likely to be legitimate uses?

One legitimate use is to test for undefined weak symbols.  That's not an
argument against the warning however... more often than not this is surely
a mistake.

Jeff