KVM: MMU: remove redundant check in mmu_set_spte

The following code flow is unnecessary:

	if (largepage)
		was_rmapped = is_large_pte(*shadow_pte);
	 else
	 	was_rmapped = 1;

The is_large_pte() function will always evaluate to one here because the
(largepage && !is_large_pte) case is already handled in the first
if-clause. So we can remove this check and set was_rmapped to one always
here.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Acked-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index ef060ec..c90b4b2 100644 (file)
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1791,12 +1791,8 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *shadow_pte,
                        pgprintk("hfn old %lx new %lx\n",
                                 spte_to_pfn(*shadow_pte), pfn);
                        rmap_remove(vcpu->kvm, shadow_pte);
-               } else {
-                       if (largepage)
-                               was_rmapped = is_large_pte(*shadow_pte);
-                       else
-                               was_rmapped = 1;
-               }
+               } else
+                       was_rmapped = 1;
        }
        if (set_spte(vcpu, shadow_pte, pte_access, user_fault, write_fault,
                      dirty, largepage, global, gfn, pfn, speculative, true)) {