workqueue: deprecate __cancel_delayed_work()

Now that cancel_delayed_work() can be safely called from IRQ handlers,
there's no reason to use __cancel_delayed_work().  Use
cancel_delayed_work() instead of __cancel_delayed_work() and mark the
latter deprecated.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Jens Axboe <axboe@kernel.dk>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Roland Dreier <roland@kernel.org>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>

block/blk-core.c

@@ -262,7 +262,7 @@ EXPORT_SYMBOL(blk_start_queue);
  **/
 void blk_stop_queue(struct request_queue *q)
 {
-	__cancel_delayed_work(&q->delay_work);
+	cancel_delayed_work(&q->delay_work);
 	queue_flag_set(QUEUE_FLAG_STOPPED, q);
 }
 EXPORT_SYMBOL(blk_stop_queue);

drivers/block/floppy.c

@@ -890,7 +890,7 @@ static void unlock_fdc(void)
 
 	raw_cmd = NULL;
 	command_status = FD_COMMAND_NONE;
-	__cancel_delayed_work(&fd_timeout);
+	cancel_delayed_work(&fd_timeout);
 	do_floppy = NULL;
 	cont = NULL;
 	clear_bit(0, &fdc_busy);

drivers/infiniband/core/mad.c

@@ -2004,7 +2004,7 @@ static void adjust_timeout(struct ib_mad_agent_private *mad_agent_priv)
 	unsigned long delay;
 
 	if (list_empty(&mad_agent_priv->wait_list)) {
-		__cancel_delayed_work(&mad_agent_priv->timed_work);
+		cancel_delayed_work(&mad_agent_priv->timed_work);
 	} else {
 		mad_send_wr = list_entry(mad_agent_priv->wait_list.next,
 					 struct ib_mad_send_wr_private,

drivers/video/omap2/dss/dsi.c

@@ -4306,7 +4306,7 @@ static void dsi_framedone_irq_callback(void *data, u32 mask)
 	 * and is sending the data.
 	 */
 
-	__cancel_delayed_work(&dsi->framedone_timeout_work);
+	cancel_delayed_work(&dsi->framedone_timeout_work);
 
 	dsi_handle_framedone(dsidev, 0);
 }

include/linux/workqueue.h

@@ -434,7 +434,7 @@ extern unsigned int work_busy(struct work_struct *work);
  * if it returns 0 the timer function may be running and the queueing is in
  * progress.
  */
-static inline bool __cancel_delayed_work(struct delayed_work *work)
+static inline bool __deprecated __cancel_delayed_work(struct delayed_work *work)
 {
 	bool ret;