kvm: arm/arm64: Remove spurious WARN_ON

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 <cdall@kernel.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c
index ee7ce8fa4a12c6cea7b41588a43fcc82f8f05427..4a285d760ce0eaaa87524d416902ec74681e5972 100644 (file)
--- a/virt/kvm/arm/mmu.c
+++ b/virt/kvm/arm/mmu.c
@@ -1005,7 +1005,7 @@ 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);