linux-kernel - [PATCH 7/7] KVM: MMU: stop using mmu_spte_get

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Message-Id: <20170503105224.19049-8-xiaoguangrong@tencent.com>
Date:   Wed,  3 May 2017 18:52:24 +0800
From:   guangrong.xiao@...il.com
To:     pbonzini@...hat.com, mtosatti@...hat.com, avi.kivity@...il.com,
        rkrcmar@...hat.com
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        qemu-devel@...gnu.org, Xiao Guangrong <xiaoguangrong@...cent.com>
Subject: [PATCH 7/7] KVM: MMU: stop using mmu_spte_get_lockless under mmu-lock

From: Xiao Guangrong <xiaoguangrong@...cent.com>

mmu_spte_age() is under the protection of mmu-lock, no reason to use
mmu_spte_get_lockless()

Signed-off-by: Xiao Guangrong <xiaoguangrong@...cent.com>
---
 arch/x86/kvm/mmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index f6a74e7..a8b91ee 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -852,7 +852,7 @@ static u64 restore_acc_track_spte(u64 spte)
 /* Returns the Accessed status of the PTE and resets it at the same time. */
 static bool mmu_spte_age(u64 *sptep)
 {
-	u64 spte = mmu_spte_get_lockless(sptep);
+	u64 spte = *sptep;
 
 	if (!is_accessed_spte(spte))
 		return false;
-- 
2.9.3