Use kernel.h macro definition.

Signed-off-by: Fabian Frederick <f...@skynet.be>
---
 drivers/usb/class/cdc-acm.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 5c8f581..8d045be 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1267,12 +1267,9 @@ skip_normal_probe:
                                                != CDC_DATA_INTERFACE_TYPE) {
                if (control_interface->cur_altsetting->desc.bInterfaceClass
                                                == CDC_DATA_INTERFACE_TYPE) {
-                       struct usb_interface *t;
                        dev_dbg(&intf->dev,
                                "Your device has switched interfaces.\n");
-                       t = control_interface;
-                       control_interface = data_interface;
-                       data_interface = t;
+                       swap(control_interface, data_interface);
                } else {
                        return -EINVAL;
                }
@@ -1301,12 +1298,9 @@ skip_normal_probe:
        /* workaround for switched endpoints */
        if (!usb_endpoint_dir_in(epread)) {
                /* descriptors are swapped */
-               struct usb_endpoint_descriptor *t;
                dev_dbg(&intf->dev,
                        "The data interface has switched endpoints\n");
-               t = epread;
-               epread = epwrite;
-               epwrite = t;
+               swap(epread, epwrite);
        }
 made_compressed_probe:
        dev_dbg(&intf->dev, "interfaces are valid\n");
-- 
2.4.0

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