On Tue, Jan 09, 2018 at 07:04:02PM +0000, Suzuki K Poulose wrote:
> On a 4-level page table pgd entry can be empty, unlike a 3-level
> page table. Remove the spurious WARN_ON() in stage_get_pud().
Acked-by: Christoffer Dall <christoffer.dall@xxxxxxxxxx>
>
> Cc: Marc Zyngier <marc.zyngier@xxxxxxx>
> Cc: Christoffer Dall <cdall@xxxxxxxxxx>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
> ---
> virt/kvm/arm/mmu.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c
> index e6548c85c495..78253fe00fc4 100644
> --- a/virt/kvm/arm/mmu.c
> +++ b/virt/kvm/arm/mmu.c
> @@ -870,7 +870,7 @@ static pud_t *stage2_get_pud(struct kvm *kvm, struct kvm_mmu_memory_cache *cache
> pud_t *pud;
>
> pgd = kvm->arch.pgd + stage2_pgd_index(addr);
> - if (WARN_ON(stage2_pgd_none(*pgd))) {
> + if (stage2_pgd_none(*pgd)) {
> if (!cache)
> return NULL;
> pud = mmu_memory_cache_alloc(cache);
> --
> 2.13.6
>
