Re: [PATCH 6/12] KVM: work around SMP requirement

[Avi Kivity <avi@qumranet.com>]

Jeff Garzik wrote:
> Adrian Bunk wrote:
> > On Tue, Oct 23, 2007 at 06:36:40PM -0400, Jeff Garzik wrote:
> > > KVM is currently completely broken for the !CONFIG_SMP case.
> > >
> > > drivers/kvm/kvm_main.c: In function ‘kvm_flush_remote_tlbs’:
> > > drivers/kvm/kvm_main.c:220: error: implicit declaration of function 
> > > ‘smp_call_function_mask’
> > >
> > > Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
> > > ---
> > > I hope the KVM maintainer can come up with a better solution...
> > >
> > > diff --git a/drivers/kvm/Kconfig b/drivers/kvm/Kconfig
> > > index 8749fa4..e35fbc6 100644
> > > --- a/drivers/kvm/Kconfig
> > > +++ b/drivers/kvm/Kconfig
> > > @@ -16,7 +16,7 @@ if VIRTUALIZATION
> > >  
> > >  config KVM
> > >      tristate "Kernel-based Virtual Machine (KVM) support"
> > > -    depends on X86 && EXPERIMENTAL
> > > +    depends on X86 && EXPERIMENTAL && SMP
> > > ...
> >
> > Assuming it won't get fixed soon, the pattern would be "(SMP || 
> > BROKEN)".
> >
> > The effect is the same, but this makes it more obvious that KVM does 
> > not depend architecturally on SMP but just broken.
> >
> > Of course, the preferred solution is to simply get KVM fixed...
>
> In general I agree, but I specifically avoided CONFIG_BROKEN in case 
> it was an intentional choice to require an SMP kernel.

Of course SMP is not required.  I'll submit a patch to make 
smp_call_function_mask() available on UP kernels.  Andrew, please don't 
apply the KVM Kconfig patch.

--
error compiling committee.c: too many arguments to function

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