Re: [PATCH 2/9] KVM: define kvm_fault_pfn statically

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On Sun, Jul 29, 2012 at 04:12:58PM +0800, Xiao Guangrong wrote:
> After that, the exported and un-inline function, get_fault_pfn,
> can be removed
> 
> Signed-off-by: Xiao Guangrong <xiaoguangrong@xxxxxxxxxxxxxxxxxx>
> ---
>  arch/x86/kvm/mmu.c       |    2 +-
>  include/linux/kvm_host.h |    3 ++-
>  virt/kvm/kvm_main.c      |   12 +++---------
>  3 files changed, 6 insertions(+), 11 deletions(-)
> 
> diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
> index a9a2052..19bac91 100644
> --- a/arch/x86/kvm/mmu.c
> +++ b/arch/x86/kvm/mmu.c
> @@ -2514,7 +2514,7 @@ static pfn_t pte_prefetch_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn,
> 
>  	slot = gfn_to_memslot_dirty_bitmap(vcpu, gfn, no_dirty_log);
>  	if (!slot)
> -		return get_fault_pfn();
> +		return kvm_fault_pfn;
> 
>  	hva = gfn_to_hva_memslot(slot, gfn);
> 
> diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
> index dbc65f9..7cd6871 100644
> --- a/include/linux/kvm_host.h
> +++ b/include/linux/kvm_host.h
> @@ -48,6 +48,8 @@
>  #define KVM_MAX_MMIO_FRAGMENTS \
>  	(KVM_MMIO_SIZE / KVM_USER_MMIO_SIZE + KVM_EXTRA_MMIO_FRAGMENTS)
> 
> +#define kvm_fault_pfn	(-EFAULT)
> +

This is confusing, it appears to be a variable not a definition. 
Use "#define KVM_FAULT_PFN_ERR" please.

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