cdc-acm: remove unused element of struct acm

write_used was introduced with commit 884b600f63dc ("[PATCH] USB: fix acm
trouble with terminals") but never used since.

Signed-off-by: Tobias Herzog <t-herzog@gmx.de>
Acked-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 1 deletions

diff --git a/drivers/usb/class/cdc-acm.h b/drivers/usb/class/cdc-acm.h
index b51913836409..7a2b3deafc90 100644
--- a/drivers/usb/class/cdc-acm.h
+++ b/drivers/usb/class/cdc-acm.h
@@ -101,7 +101,6 @@ struct acm {
         u8 *notification_buffer;                        /* to reassemble fragmented notifications */
         unsigned int nb_index;
         unsigned int nb_size;
-        int write_used;                                 /* number of non-empty write buffers */
         int transmitting;
         spinlock_t write_lock;
         struct mutex mutex;