--- drivers/usb/class/cdc-acm.h

+++ drivers/usb/class/cdc-acm.h

@@ -112,7 +112,6 @@ struct acm {

struct mutex mutex;

struct usb_cdc_line_coding line; /* bits, stop, parity */

struct work_struct work; /* work queue entry for line discipline waking up */

- struct work_struct waker;

wait_queue_head_t drain_wait; /* close processing */

struct tasklet_struct urb_task; /* rx processing */

spinlock_t throttle_lock; /* synchronize throtteling and read callback */