struct ni_660x_private {
        struct mite_struct *mite;
        struct ni_gpct_device *counter_dev;
-       uint64_t pfi_direction_bits;
+       u64 pfi_direction_bits;
        struct mite_dma_descriptor_ring
        *mite_rings[NI_660X_MAX_NUM_CHIPS][counters_per_chip];
        spinlock_t mite_channel_lock;
        }
 
        devpriv->pfi_output_selects[chan] = source;
-       if (devpriv->pfi_direction_bits & (((uint64_t) 1) << chan))
+       if (devpriv->pfi_direction_bits & (1ULL << chan))
                ni_660x_select_pfi_output(dev, chan,
                                          devpriv->pfi_output_selects[chan]);
        return 0;
 {
        struct ni_660x_private *devpriv = dev->private;
        unsigned int chan = CR_CHAN(insn->chanspec);
-       uint64_t bit = 1ULL << chan;
+       u64 bit = 1ULL << chan;
        unsigned int val;
        int ret;