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From:   Suzuki K Poulose <suzuki.poulose@arm.com>
To:     linux-arm-kernel@lists.infradead.org
Cc:     linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
        kvmarm@lists.cs.columbia.edu, james.morse@arm.com,
        marc.zyngier@arm.com, cdall@kernel.org, eric.auger@redhat.com,
        julien.grall@arm.com, will.deacon@arm.com, catalin.marinas@arm.com,
        punit.agrawal@arm.com, qemu-devel@nongnu.org,
        Suzuki K Poulose <suzuki.poulose@arm.com>
Subject: [PATCH v3 06/20] kvm: arm/arm64: Remove spurious WARN_ON
Date:   Fri, 29 Jun 2018 12:15:26 +0100
Message-Id: <1530270944-11351-7-git-send-email-suzuki.poulose@arm.com>
In-Reply-To: <1530270944-11351-1-git-send-email-suzuki.poulose@arm.com>
References: <1530270944-11351-1-git-send-email-suzuki.poulose@arm.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

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().

Cc: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Christoffer Dall <cdall@kernel.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
 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 061e6b3..308171c 100644
--- a/virt/kvm/arm/mmu.c
+++ b/virt/kvm/arm/mmu.c
@@ -976,7 +976,7 @@ 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);
-- 
2.7.4