From feb3eb704a86d97edb296502e95da42d622dac61 Mon Sep 17 00:00:00 2001 From: Gleb Natapov Date: Wed, 30 Jan 2013 16:45:00 +0200 Subject: [PATCH] KVM: MMU: make spte_is_locklessly_modifiable() more clear spte_is_locklessly_modifiable() checks that both SPTE_HOST_WRITEABLE and SPTE_MMU_WRITEABLE are present on spte. Make it more explicit. Signed-off-by: Gleb Natapov Signed-off-by: Marcelo Tosatti --- arch/x86/kvm/mmu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 9f628f7..2fa82b0 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -448,7 +448,8 @@ static bool __check_direct_spte_mmio_pf(u64 spte) static bool spte_is_locklessly_modifiable(u64 spte) { - return !(~spte & (SPTE_HOST_WRITEABLE | SPTE_MMU_WRITEABLE)); + return (spte & (SPTE_HOST_WRITEABLE | SPTE_MMU_WRITEABLE)) == + (SPTE_HOST_WRITEABLE | SPTE_MMU_WRITEABLE); } static bool spte_has_volatile_bits(u64 spte) -- 2.7.4