Re: [PATCH -tip] Switch arm defconfig files fromCONFIG_CLASSIC_RCU to CONFIG_TREE_RCU.

[Ingo Molnar]

* Sam Ravnborg <sam@xxxxxxxxxxxx> wrote:

> On Thu, Dec 25, 2008 at 09:36:11AM +0100, Ingo Molnar wrote:
> > 
> > below is the fix for another small buglet that hits architectures that do 
> > not include kernel/Kconfig.preempt.
> 
> What is needed to let all architectures include Kconfig.preempt?
> We should not advertise preemption if not supported,
> but we could do this by a simple Kconfig symbol:
> 
> config HAVE_PREEMPT
> 	bool
> 
> And let all architectures that supports preemption do:
> 
> config "ARCH"
> 	select HAVE_PREEMPT
> 
> But maybe there is a simpler solution

Since a preemptive kernel is not supported by all architectures, there has 
to be per arch ways to express this - i.e. i think your solution is the 
cleanest.

	Ingo
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