Re: [RFC PATCH] KVM: x86/mmu: replace BUG() with KVM_BUG() in shadow mmu

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On Wed, Nov 23, 2022, Mingwei Zhang wrote:
> diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
> index 4736d7849c60..075d31b0db9c 100644
> --- a/arch/x86/kvm/mmu/mmu.c
> +++ b/arch/x86/kvm/mmu/mmu.c
> @@ -955,12 +955,12 @@ static void pte_list_remove(u64 *spte, struct kvm_rmap_head *rmap_head)
>  
>  	if (!rmap_head->val) {
>  		pr_err("%s: %p 0->BUG\n", __func__, spte);
> -		BUG();
> +		KVM_BUG();

This won't compile.  KVM_BUG() isn't a direct replacement for BUG(), it's more
akin to WARN().

And that's why I suggested this be RFC: @kvm needs to be plumbed down here in order
to use KVM_BUG().  I don't mind that too much, it's just a little unfortunate.



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