> I know, C has too many operator priority levels, and I know, some of them
> are peculiar, such as + - over << >>. But -Wparentheses is too strict,
> e.g., it complains about not grouping && instructions just because there
> is an ||.

A mistake I make on rare occasion, and I've been using C for 20 years.

> Really, though, you shouldn't be hacking the kernel if you don't even know
> the C basics. ...  Plus, redundant parens are prohibited in KNF.

I'd be a lot more impressed with KNF if it valued correctness over machismo.