SMP_FLAG_CFM_PENDING
set_bit(SMP_FLAG_CFM_PENDING, &smp->flags);
if (test_and_clear_bit(SMP_FLAG_CFM_PENDING, &smp->flags))
if (test_bit(SMP_FLAG_CFM_PENDING, &smp->flags)) {
set_bit(SMP_FLAG_CFM_PENDING, &smp->flags);
set_bit(SMP_FLAG_CFM_PENDING, &smp->flags);
clear_bit(SMP_FLAG_CFM_PENDING, &smp->flags);