Re: [PATCH 11/15] ia64/pv_ops: paravirtualize NR_IRQS

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Isaku Yamahata wrote:
> I'm willing to introduce something like PARAVIRT_NR_IRQS,
> but I don't see how PARAVIRT_NR_IRQS solves the issues.
> What I want here is to define by cpp
> #define PARAVIRT_NR_IRQS                                                \
>         max(                                                            \
>                 IA64_NATIVE_NR_IRQS,                                    \
>                 XEN_NR_IRQS,            /* only if CONFIG_XEN */        \
>                 LGUSET_NR_IRQS,         /* only if CONFIG_LGUSET */     \
>                 KVM_GUEST_NR_IRQS,      /* only if CONFIG_KVM_GUEST */  \
>                 MORE_FUTURE_VM_NR_IRQS, /* only if ...*/                \
>                 ....    \
>         )
> 
> Probably I'm missing something.
> Could you suggest more concretly? Hopefully (pseudo) code snippet.

I'd rather have PARAVIRT_NR_IRQ set from Kconfig if possible given that
all of these are constants anyway. If we cannot do that, then it would
be better to do the #if FOO_NR_IRQ > PARAVIRT_NR_IRQ in the various
header files for Xen/KVM/lguest so we don't get the clutter in the main
makefile.

Cheers,
Jes

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