warning when a function's address is tested?

[Andrew Morton]

We just found a silly bug in the Linux kernel:

-	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?


void foo(void)
{}

void bar(void)
{}

int main()
{
	if (foo)
		bar();
	return 0;
}