* ISA constants
  */
 
-#define REGION_ALIGNMENT       ~7
-#define REGION_OFFSET          5
-#define REGION_LENGTH          2
+#define IOREGION_ALIGNMENT     ~7
+#define IOREGION_OFFSET                5
+#define IOREGION_LENGTH                2
 #define ADDR_REG_OFFSET                5
 #define DATA_REG_OFFSET                6
 
        u8 fan4pin, fan5pin;
        int i, err = 0;
 
-       if (!request_region(address + REGION_OFFSET, REGION_LENGTH,
+       if (!request_region(address + IOREGION_OFFSET, IOREGION_LENGTH,
                            w83627ehf_driver.driver.name)) {
                err = -EBUSY;
                goto exit;
 exit_free:
        kfree(data);
 exit_release:
-       release_region(address + REGION_OFFSET, REGION_LENGTH);
+       release_region(address + IOREGION_OFFSET, IOREGION_LENGTH);
 exit:
        return err;
 }
 
        if ((err = i2c_detach_client(client)))
                return err;
-       release_region(client->addr + REGION_OFFSET, REGION_LENGTH);
+       release_region(client->addr + IOREGION_OFFSET, IOREGION_LENGTH);
        kfree(data);
 
        return 0;
        superio_select(W83627EHF_LD_HWM);
        val = (superio_inb(SIO_REG_ADDR) << 8)
            | superio_inb(SIO_REG_ADDR + 1);
-       *addr = val & REGION_ALIGNMENT;
+       *addr = val & IOREGION_ALIGNMENT;
        if (*addr == 0) {
                superio_exit();
                return -ENODEV;