KVM: MMU: remove the redundant get_written_sptes
get_written_sptes is called twice in kvm_mmu_pte_write, one of them can be removed Signed-off-by: NXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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