[PATCH 2/2] KVM: X86: Remove the present check from for_each_shadow_entry* loop body

[Lai Jiangshan <jiangshanlai@gmail.com>]

From: Lai Jiangshan <laijs@linux.alibaba.com>

The function __shadow_walk_next() for the for_each_shadow_entry* looping
has the check and propagates the result to shadow_walk_okay().

Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
---
 arch/x86/kvm/mmu/mmu.c | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index c48ecb25d5f8..42eebba6782e 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -3152,9 +3152,6 @@ static u64 *fast_pf_get_last_sptep(struct kvm_vcpu *vcpu, gpa_t gpa, u64 *spte)
 	for_each_shadow_entry_lockless(vcpu, gpa, iterator, old_spte) {
 		sptep = iterator.sptep;
 		*spte = old_spte;
-
-		if (!is_shadow_present_pte(old_spte))
-			break;
 	}
 
 	return sptep;
@@ -3694,9 +3691,6 @@ static int get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes, int *root_level
 		spte = mmu_spte_get_lockless(iterator.sptep);
 
 		sptes[leaf] = spte;
-
-		if (!is_shadow_present_pte(spte))
-			break;
 	}
 
 	return leaf;
@@ -3811,11 +3805,8 @@ static void shadow_page_table_clear_flood(struct kvm_vcpu *vcpu, gva_t addr)
 	u64 spte;
 
 	walk_shadow_page_lockless_begin(vcpu);
-	for_each_shadow_entry_lockless(vcpu, addr, iterator, spte) {
+	for_each_shadow_entry_lockless(vcpu, addr, iterator, spte)
 		clear_sp_write_flooding_count(iterator.sptep);
-		if (!is_shadow_present_pte(spte))
-			break;
-	}
 	walk_shadow_page_lockless_end(vcpu);
 }
 
-- 
2.19.1.6.gb485710b