Re: [RFC PATCH 1/2] Kconfig: Introduce "uses" keyword

[Arnd Bergmann]

On Thu, Apr 23, 2020 at 5:16 PM Jason Gunthorpe <jgg@xxxxxxxx> wrote:
> On Thu, Apr 23, 2020 at 11:11:46AM -0400, Nicolas Pitre wrote:

> > > > I don't see how that one can be helped. The MTD dependency is not
> > > > optional.
> > >
> > > Could it be done as
> > >
> > > config MTD
> > >    depends on CRAMFS if CRAMFS_MTD
> > >
> > > ?
> >
> > No. There is no logic in restricting MTD usage based on CRAMFS or
> > CRAMFS_MTD.
>
> Ah, I got it backwards, maybe this:
>
> config CRAMFS
>    depends on MTD if CRAMFS_MTD

I'm not sure this can work if you also have the requirement that 'CRAMFS_MTD
depends on CRAMFS': dependencies in Kconfig generally cannot have
loops in them.

       Arnd