workqueue: avoid using deprecated functions

The network merge brought in a few users of functions that got
deprecated by the workqueue cleanups: the 'system_nrt_wq' is now the
same as the regular system_wq, since all workqueues are now non-
reentrant.

Similarly, remove one use of flush_work_sync() - the regular
flush_work() has become synchronous, and the "_sync()" version is thus
deprecated as being superfluous.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/net/ieee802154/mrf24j40.c

@@ -718,7 +718,7 @@ static int __devexit mrf24j40_remove(struct spi_device *spi)
 	dev_dbg(printdev(devrec), "remove\n");
 
 	free_irq(spi->irq, devrec);
-	flush_work_sync(&devrec->irqwork); /* TODO: Is this the right call? */
+	flush_work(&devrec->irqwork); /* TODO: Is this the right call? */
 	ieee802154_unregister_device(devrec->dev);
 	ieee802154_free_device(devrec->dev);
 	/* TODO: Will ieee802154_free_device() wait until ->xmit() is

net/nfc/core.c

@@ -715,7 +715,7 @@ static void nfc_check_pres_timeout(unsigned long data)
 {
 	struct nfc_dev *dev = (struct nfc_dev *)data;
 
-	queue_work(system_nrt_wq, &dev->check_pres_work);
+	schedule_work(&dev->check_pres_work);
 }
 
 struct class nfc_class = {

net/nfc/hci/core.c

@@ -141,7 +141,7 @@ static void __nfc_hci_cmd_completion(struct nfc_hci_dev *hdev, int err,
 	kfree(hdev->cmd_pending_msg);
 	hdev->cmd_pending_msg = NULL;
 
-	queue_work(system_nrt_wq, &hdev->msg_tx_work);
+	schedule_work(&hdev->msg_tx_work);
 }
 
 void nfc_hci_resp_received(struct nfc_hci_dev *hdev, u8 result,
@@ -326,7 +326,7 @@ static void nfc_hci_cmd_timeout(unsigned long data)
 {
 	struct nfc_hci_dev *hdev = (struct nfc_hci_dev *)data;
 
-	queue_work(system_nrt_wq, &hdev->msg_tx_work);
+	schedule_work(&hdev->msg_tx_work);
 }
 
 static int hci_dev_connect_gates(struct nfc_hci_dev *hdev, u8 gate_count,
@@ -714,7 +714,7 @@ static void nfc_hci_recv_from_llc(struct nfc_hci_dev *hdev, struct sk_buff *skb)
 		nfc_hci_hcp_message_rx(hdev, pipe, type, instruction, hcp_skb);
 	} else {
 		skb_queue_tail(&hdev->msg_rx_queue, hcp_skb);
-		queue_work(system_nrt_wq, &hdev->msg_rx_work);
+		schedule_work(&hdev->msg_rx_work);
 	}
 }
 

net/nfc/hci/hcp.c

@@ -108,7 +108,7 @@ int nfc_hci_hcp_message_tx(struct nfc_hci_dev *hdev, u8 pipe,
 	list_add_tail(&cmd->msg_l, &hdev->msg_tx_queue);
 	mutex_unlock(&hdev->msg_tx_mutex);
 
-	queue_work(system_nrt_wq, &hdev->msg_tx_work);
+	schedule_work(&hdev->msg_tx_work);
 
 	return 0;
 

net/nfc/hci/llc_shdlc.c

@@ -588,7 +588,7 @@ static void llc_shdlc_connect_timeout(unsigned long data)
 
 	pr_debug("\n");
 
-	queue_work(system_nrt_wq, &shdlc->sm_work);
+	schedule_work(&shdlc->sm_work);
 }
 
 static void llc_shdlc_t1_timeout(unsigned long data)
@@ -597,7 +597,7 @@ static void llc_shdlc_t1_timeout(unsigned long data)
 
 	pr_debug("SoftIRQ: need to send ack\n");
 
-	queue_work(system_nrt_wq, &shdlc->sm_work);
+	schedule_work(&shdlc->sm_work);
 }
 
 static void llc_shdlc_t2_timeout(unsigned long data)
@@ -606,7 +606,7 @@ static void llc_shdlc_t2_timeout(unsigned long data)
 
 	pr_debug("SoftIRQ: need to retransmit\n");
 
-	queue_work(system_nrt_wq, &shdlc->sm_work);
+	schedule_work(&shdlc->sm_work);
 }
 
 static void llc_shdlc_sm_work(struct work_struct *work)
@@ -646,7 +646,7 @@ static void llc_shdlc_sm_work(struct work_struct *work)
 	case SHDLC_NEGOTIATING:
 		if (timer_pending(&shdlc->connect_timer) == 0) {
 			shdlc->state = SHDLC_CONNECTING;
-			queue_work(system_nrt_wq, &shdlc->sm_work);
+			schedule_work(&shdlc->sm_work);
 		}
 
 		llc_shdlc_handle_rcv_queue(shdlc);
@@ -711,7 +711,7 @@ static int llc_shdlc_connect(struct llc_shdlc *shdlc)
 
 	mutex_unlock(&shdlc->state_mutex);
 
-	queue_work(system_nrt_wq, &shdlc->sm_work);
+	schedule_work(&shdlc->sm_work);
 
 	wait_event(connect_wq, shdlc->connect_result != 1);
 
@@ -728,7 +728,7 @@ static void llc_shdlc_disconnect(struct llc_shdlc *shdlc)
 
 	mutex_unlock(&shdlc->state_mutex);
 
-	queue_work(system_nrt_wq, &shdlc->sm_work);
+	schedule_work(&shdlc->sm_work);
 }
 
 /*
@@ -746,7 +746,7 @@ static void llc_shdlc_recv_frame(struct llc_shdlc *shdlc, struct sk_buff *skb)
 		skb_queue_tail(&shdlc->rcv_q, skb);
 	}
 
-	queue_work(system_nrt_wq, &shdlc->sm_work);
+	schedule_work(&shdlc->sm_work);
 }
 
 static void *llc_shdlc_init(struct nfc_hci_dev *hdev, xmit_to_drv_t xmit_to_drv,
@@ -837,7 +837,7 @@ static int llc_shdlc_xmit_from_hci(struct nfc_llc *llc, struct sk_buff *skb)
 
 	skb_queue_tail(&shdlc->send_q, skb);
 
-	queue_work(system_nrt_wq, &shdlc->sm_work);
+	schedule_work(&shdlc->sm_work);
 
 	return 0;
 }

net/nfc/llcp/llcp.c

@@ -181,7 +181,7 @@ static void nfc_llcp_symm_timer(unsigned long data)
 
 	pr_err("SYMM timeout\n");
 
-	queue_work(system_nrt_wq, &local->timeout_work);
+	schedule_work(&local->timeout_work);
 }
 
 struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev)
@@ -1101,7 +1101,7 @@ static void nfc_llcp_rx_work(struct work_struct *work)
 
 	}
 
-	queue_work(system_nrt_wq, &local->tx_work);
+	schedule_work(&local->tx_work);
 	kfree_skb(local->rx_pending);
 	local->rx_pending = NULL;
 
@@ -1120,7 +1120,7 @@ void nfc_llcp_recv(void *data, struct sk_buff *skb, int err)
 
 	local->rx_pending = skb_get(skb);
 	del_timer(&local->link_timer);
-	queue_work(system_nrt_wq, &local->rx_work);
+	schedule_work(&local->rx_work);
 
 	return;
 }
@@ -1135,7 +1135,7 @@ int nfc_llcp_data_received(struct nfc_dev *dev, struct sk_buff *skb)
 
 	local->rx_pending = skb_get(skb);
 	del_timer(&local->link_timer);
-	queue_work(system_nrt_wq, &local->rx_work);
+	schedule_work(&local->rx_work);
 
 	return 0;
 }
@@ -1170,7 +1170,7 @@ void nfc_llcp_mac_is_up(struct nfc_dev *dev, u32 target_idx,
 	if (rf_mode == NFC_RF_INITIATOR) {
 		pr_debug("Queueing Tx work\n");
 
-		queue_work(system_nrt_wq, &local->tx_work);
+		schedule_work(&local->tx_work);
 	} else {
 		mod_timer(&local->link_timer,
 			  jiffies + msecs_to_jiffies(local->remote_lto));