WorkStruct: make allyesconfig

Fix up for make allyesconfig.

Signed-Off-By: David Howells <dhowells@redhat.com>
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 9a9012f..6408e10 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -421,9 +421,9 @@
 		schedule_work(&acm->work);
 }
 
-static void acm_softint(void *private)
+static void acm_softint(struct work_struct *work)
 {
-	struct acm *acm = private;
+	struct acm *acm = container_of(work, struct acm, work);
 	dbg("Entering acm_softint.");
 	
 	if (!ACM_READY(acm))
@@ -927,7 +927,7 @@
 	acm->rx_buflimit = num_rx_buf;
 	acm->urb_task.func = acm_rx_tasklet;
 	acm->urb_task.data = (unsigned long) acm;
-	INIT_WORK(&acm->work, acm_softint, acm);
+	INIT_WORK(&acm->work, acm_softint);
 	spin_lock_init(&acm->throttle_lock);
 	spin_lock_init(&acm->write_lock);
 	spin_lock_init(&acm->read_lock);