staging: r8723au: Remove unused semaphores

The semaphores xmit_sema, terminate_xmitthread_sema, tx_retevt and
io_req have no users, hence remove all references to them.
Semaphores are going away in the future.
Signed-off-by: Binoy Jayan <binoy.jayan@linaro.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723au/core/rtw_xmit.c

@@ -60,8 +60,6 @@ int _rtw_init_xmit_priv23a(struct xmit_priv *pxmitpriv,
 
 	spin_lock_init(&pxmitpriv->lock);
 	spin_lock_init(&pxmitpriv->lock_sctx);
-	sema_init(&pxmitpriv->xmit_sema, 0);
-	sema_init(&pxmitpriv->terminate_xmitthread_sema, 0);
 
 	pxmitpriv->adapter = padapter;
 
@@ -177,8 +175,6 @@ int _rtw_init_xmit_priv23a(struct xmit_priv *pxmitpriv,
 	for (i = 0; i < 4; i ++)
 		pxmitpriv->wmm_para_seq[i] = i;
 
-	sema_init(&pxmitpriv->tx_retevt, 0);
-
 	pxmitpriv->ack_tx = false;
 	mutex_init(&pxmitpriv->ack_tx_mutex);
 	rtw_sctx_init23a(&pxmitpriv->ack_tx_ops, 0);

drivers/staging/rtl8723au/include/osdep_service.h

@@ -33,7 +33,6 @@
 #include <asm/byteorder.h>
 #include <linux/atomic.h>
 #include <linux/io.h>
-#include <linux/semaphore.h>
 #include <linux/sem.h>
 #include <linux/sched.h>
 #include <linux/etherdevice.h>

drivers/staging/rtl8723au/include/rtw_io.h

@@ -20,7 +20,6 @@
 #include <osdep_intf.h>
 
 #include <asm/byteorder.h>
-#include <linux/semaphore.h>
 #include <linux/list.h>
 /* include <linux/smp_lock.h> */
 #include <linux/spinlock.h>
@@ -105,7 +104,6 @@ struct io_req {
 	u32	command;
 	u32	status;
 	u8	*pbuf;
-	struct semaphore	sema;
 
 	void (*_async_io_callback)(struct rtw_adapter *padater, struct io_req *pio_req, u8 *cnxt);
 	u8 *cnxt;

drivers/staging/rtl8723au/include/rtw_xmit.h

@@ -275,9 +275,6 @@ struct agg_pkt_info {
 struct	xmit_priv {
 	spinlock_t	lock;
 
-	struct semaphore	xmit_sema;
-	struct semaphore	terminate_xmitthread_sema;
-
 	struct rtw_queue	be_pending;
 	struct rtw_queue	bk_pending;
 	struct rtw_queue	vi_pending;
@@ -310,8 +307,6 @@ struct	xmit_priv {
 				 * 2->be, 3->bk.
 				 */
 
-	struct semaphore	tx_retevt;/* all tx return event; */
-
 	struct tasklet_struct xmit_tasklet;
 
 	struct rtw_queue free_xmitbuf_queue;