linux-kernel - [PATCH 3.12 51/63] arm: kvm: STRICT_MM_TYPECHECKS fix for user_mem

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Date:	Thu, 30 Apr 2015 14:12:20 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Steve Capper <steve.capper@...aro.org>,
	Christoffer Dall <christoffer.dall@...aro.org>,
	Shannon Zhao <shannon.zhao@...aro.org>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 51/63] arm: kvm: STRICT_MM_TYPECHECKS fix for user_mem_abort

From: Steve Capper <steve.capper@...aro.org>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 3d08c629244257473450a8ba17cb8184b91e68f8 upstream.

Commit:
b886576 ARM: KVM: user_mem_abort: support stage 2 MMIO page mapping

introduced some code in user_mem_abort that failed to compile if
STRICT_MM_TYPECHECKS was enabled.

This patch fixes up the failing comparison.

Signed-off-by: Steve Capper <steve.capper@...aro.org>
Reviewed-by: Kim Phillips <kim.phillips@...aro.org>
Signed-off-by: Christoffer Dall <christoffer.dall@...aro.org>
Signed-off-by: Shannon Zhao <shannon.zhao@...aro.org>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 arch/arm/kvm/mmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c
index f9740851a6a4..90422a536083 100644
--- a/arch/arm/kvm/mmu.c
+++ b/arch/arm/kvm/mmu.c
@@ -698,7 +698,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
 		kvm_set_pfn_dirty(pfn);
 	}
 	stage2_set_pte(vcpu->kvm, memcache, fault_ipa, &new_pte,
-		       mem_type == PAGE_S2_DEVICE);
+		pgprot_val(mem_type) == pgprot_val(PAGE_S2_DEVICE));
 
 out_unlock:
 	spin_unlock(&vcpu->kvm->mmu_lock);
-- 
2.3.5

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