pci230_release_shared(dev, (unsigned char)~0, owner);
 }
 
-static unsigned int pci230_divide_ns(uint64_t ns, unsigned int timebase,
+static unsigned int pci230_divide_ns(u64 ns, unsigned int timebase,
                                     unsigned int flags)
 {
-       uint64_t div;
+       u64 div;
        unsigned int rem;
 
        div = ns;
  * Given desired period in ns, returns the required internal clock source
  * and gets the initial count.
  */
-static unsigned int pci230_choose_clk_count(uint64_t ns, unsigned int *count,
+static unsigned int pci230_choose_clk_count(u64 ns, unsigned int *count,
                                            unsigned int flags)
 {
        unsigned int clk_src, cnt;
 }
 
 static void pci230_ct_setup_ns_mode(struct comedi_device *dev, unsigned int ct,
-                                   unsigned int mode, uint64_t ns,
+                                   unsigned int mode, u64 ns,
                                    unsigned int flags)
 {
        unsigned int clk_src;
                        zgat = pci230_gat_config(0, GAT_VCC);
                        outb(zgat, dev->iobase + PCI230_ZGAT_SCE);
                        pci230_ct_setup_ns_mode(dev, 0, I8254_MODE1,
-                                               ((uint64_t)cmd->convert_arg *
+                                               ((u64)cmd->convert_arg *
                                                 cmd->scan_end_arg),
                                                CMDF_ROUND_UP);
                        if (cmd->scan_begin_src == TRIG_TIMER) {