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Groups > linux.kernel > #1634877

[PATCH 7/7] KVM: MMU: stop using mmu_spte_get_lockless under mmu-lock

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From: Xiao Guangrong <xiaoguangrong@tencent.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@tencent.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

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[PATCH 0/7] KVM: MMU: fast write protect guangrong.xiao@gmail.com - 2017-05-03 13:00 +0200
  [PATCH 4/7] KVM: MMU: enable KVM_WRITE_PROTECT_ALL_MEM guangrong.xiao@gmail.com - 2017-05-03 13:00 +0200
  [PATCH 6/7] KVM: MMU: clarify fast_pf_fix_direct_spte guangrong.xiao@gmail.com - 2017-05-03 13:00 +0200
  [PATCH 5/7] KVM: MMU: allow dirty log without write protect guangrong.xiao@gmail.com - 2017-05-03 13:00 +0200
  [PATCH 3/7] KVM: MMU: introduce kvm_mmu_write_protect_all_pages guangrong.xiao@gmail.com - 2017-05-03 13:00 +0200
  [PATCH 1/7] KVM: MMU: correct the behavior of mmu_spte_update_no_track guangrong.xiao@gmail.com - 2017-05-03 13:00 +0200
  [PATCH 7/7] KVM: MMU: stop using mmu_spte_get_lockless under mmu-lock guangrong.xiao@gmail.com - 2017-05-03 13:00 +0200
  [PATCH 2/7] KVM: MMU: introduce possible_writable_spte_bitmap guangrong.xiao@gmail.com - 2017-05-03 13:00 +0200
  Re: [PATCH 0/7] KVM: MMU: fast write protect Paolo Bonzini <pbonzini@redhat.com> - 2017-05-03 14:30 +0200
    Re: [PATCH 0/7] KVM: MMU: fast write protect Xiao Guangrong <guangrong.xiao@gmail.com> - 2017-05-03 17:00 +0200
      Re: [PATCH 0/7] KVM: MMU: fast write protect Paolo Bonzini <pbonzini@redhat.com> - 2017-05-03 17:00 +0200
        Re: [PATCH 0/7] KVM: MMU: fast write protect Xiao Guangrong <guangrong.xiao@gmail.com> - 2017-05-04 05:40 +0200
          Re: [PATCH 0/7] KVM: MMU: fast write protect Paolo Bonzini <pbonzini@redhat.com> - 2017-05-04 09:10 +0200

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