[PATCH v3] kasan: remove redundant config option

[Andrey Konovalov]

On Mon, Jan 11, 2021 at 7:59 PM Nathan Chancellor
<natechancellor at gmail.com> wrote:
>
> > > -config KASAN_STACK_ENABLE
> > > +config KASAN_STACK
> > >         bool "Enable stack instrumentation (unsafe)" if CC_IS_CLANG && !COMPILE_TEST
> >
> > Does this syntax mean that KASAN_STACK is only present for
> > CC_IS_CLANG? Or that it can only be disabled for CC_IS_CLANG?
>
> It means that the option can only be disabled for clang.

OK, got it.

> > Anyway, I think it's better to 1. allow to control KASAN_STACK
> > regardless of the compiler (as it was possible before), and 2. avoid
>
> It has never been possible to control KASAN_STACK for GCC because of the
> bool ... if ... syntax. This patch does not change that logic. Making it
> possible to control KASAN_STACK with GCC seems fine but that is going to
> be a new change that would probably be suited for a new patch on top of
> this one.

The if syntax was never applied to KASAN_STACK, only to
KASAN_STACK_ENABLE, so it should have been possible (although I've
never specifically tried it).