[PATCH] cpuidle: fix ARCH_NEEDS_CPU_IDLE_COUPLED dependency warning

[Arnd Bergmann]

On Friday 07 June 2013, Santosh Shilimkar wrote:
> > diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
> > index f49cd51..831e89e 100644
> > --- a/arch/arm/mach-omap2/Kconfig
> > +++ b/arch/arm/mach-omap2/Kconfig
> > @@ -83,7 +83,7 @@ config ARCH_OMAP4
> >       depends on ARCH_OMAP2PLUS
> >       depends on ARCH_MULTI_V7
> >       select ARCH_HAS_OPP
> > -     select ARCH_NEEDS_CPU_IDLE_COUPLED if SMP
> > +     select ARCH_NEEDS_CPU_IDLE_COUPLED if (SMP && CPU_IDLE)
>
> I remember Colin mentioning about above dependency is taken care
> already in design [1]

It's a matter of how it gets represented in Kconfig. Right now 
the ARCH_NEEDS_CPU_IDLE_COUPLED symbol has a dependency on CPU_IDLE,
so we cannot select it if CPU_IDLE is not set (or get a build time
warning).

I originally suggested removing the dependency, but Daniel preferred
to leave it there as an explicit dependency so it is required to
do this change instead.

	Arnd