treewide: Remove TIMER_FUNC_TYPE and TIMER_DATA_TYPE casts

With all callbacks converted, and the timer callback prototype
switched over, the TIMER_FUNC_TYPE cast is no longer needed,
so remove it. Conversion was done with the following scripts:

    perl -pi -e 's|\(TIMER_FUNC_TYPE\)||g' \
        $(git grep TIMER_FUNC_TYPE | cut -d: -f1 | sort -u)

    perl -pi -e 's|\(TIMER_DATA_TYPE\)||g' \
        $(git grep TIMER_DATA_TYPE | cut -d: -f1 | sort -u)

The now unused macros are also dropped from include/linux/timer.h.

Signed-off-by: Kees Cook <keescook@chromium.org>

44 files changed, 84 insertions, 87 deletions

diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
index 680ee1d36ac9..38559f04db2c 100644
--- a/drivers/base/power/wakeup.c
+++ b/drivers/base/power/wakeup.c
@@ -481,7 +481,7 @@ static bool wakeup_source_not_registered(struct wakeup_source *ws)
 	 * Use timer struct to check if the given source is initialized
 	 * by wakeup_source_add.
 	 */
-	return ws->timer.function != (TIMER_FUNC_TYPE)pm_wakeup_timer_fn;
+	return ws->timer.function != pm_wakeup_timer_fn;
 }
 
 /*
diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c
index 55ab25f79a08..812fed069708 100644
--- a/drivers/block/aoe/aoecmd.c
+++ b/drivers/block/aoe/aoecmd.c
@@ -1429,7 +1429,7 @@ aoecmd_ata_id(struct aoedev *d)
 
 	d->rttavg = RTTAVG_INIT;
 	d->rttdev = RTTDEV_INIT;
-	d->timer.function = (TIMER_FUNC_TYPE)rexmit_timer;
+	d->timer.function = rexmit_timer;
 
 	skb = skb_clone(skb, GFP_ATOMIC);
 	if (skb) {
diff --git a/drivers/block/swim3.c b/drivers/block/swim3.c
index e620e423102b..af51015d056e 100644
--- a/drivers/block/swim3.c
+++ b/drivers/block/swim3.c
@@ -397,7 +397,7 @@ static void set_timeout(struct floppy_state *fs, int nticks,
 	if (fs->timeout_pending)
 		del_timer(&fs->timeout);
 	fs->timeout.expires = jiffies + nticks;
-	fs->timeout.function = (TIMER_FUNC_TYPE)proc;
+	fs->timeout.function = proc;
 	add_timer(&fs->timeout);
 	fs->timeout_pending = 1;
 }
diff --git a/drivers/infiniband/hw/nes/nes_verbs.c b/drivers/infiniband/hw/nes/nes_verbs.c
index db46b7b53fb4..162475aeeedd 100644
--- a/drivers/infiniband/hw/nes/nes_verbs.c
+++ b/drivers/infiniband/hw/nes/nes_verbs.c
@@ -3819,7 +3819,7 @@ void  nes_port_ibevent(struct nes_vnic *nesvnic)
 	if (!nesvnic->event_timer.function) {
 		ib_dispatch_event(&event);
 		nesvnic->last_dispatched_event = event.event;
-		nesvnic->event_timer.function = (TIMER_FUNC_TYPE)nes_handle_delayed_event;
+		nesvnic->event_timer.function = nes_handle_delayed_event;
 		nesvnic->event_timer.expires = jiffies + NES_EVENT_DELAY;
 		add_timer(&nesvnic->event_timer);
 	} else {
diff --git a/drivers/input/input.c b/drivers/input/input.c
index 44916ef4a424..e30642db50d5 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -2047,7 +2047,7 @@ static void devm_input_device_unregister(struct device *dev, void *res)
  */
 void input_enable_softrepeat(struct input_dev *dev, int delay, int period)
 {
-	dev->timer.function = (TIMER_FUNC_TYPE)input_repeat_key;
+	dev->timer.function = input_repeat_key;
 	dev->rep[REP_DELAY] = delay;
 	dev->rep[REP_PERIOD] = period;
 }
diff --git a/drivers/media/common/saa7146/saa7146_vbi.c b/drivers/media/common/saa7146/saa7146_vbi.c
index ce8d78c137f0..e1d369b976ed 100644
--- a/drivers/media/common/saa7146/saa7146_vbi.c
+++ b/drivers/media/common/saa7146/saa7146_vbi.c
@@ -402,7 +402,7 @@ static int vbi_open(struct saa7146_dev *dev, struct file *file)
 			    sizeof(struct saa7146_buf),
 			    file, &dev->v4l2_lock);
 
-	vv->vbi_read_timeout.function = (TIMER_FUNC_TYPE)vbi_read_timeout;
+	vv->vbi_read_timeout.function = vbi_read_timeout;
 	vv->vbi_read_timeout_file = file;
 
 	/* initialize the brs */
diff --git a/drivers/net/ethernet/ti/tlan.c b/drivers/net/ethernet/ti/tlan.c
index 8f53d762fbc4..5a4e78fde530 100644
--- a/drivers/net/ethernet/ti/tlan.c
+++ b/drivers/net/ethernet/ti/tlan.c
@@ -254,7 +254,7 @@ tlan_set_timer(struct net_device *dev, u32 ticks, u32 type)
 			spin_unlock_irqrestore(&priv->lock, flags);
 		return;
 	}
-	priv->timer.function = (TIMER_FUNC_TYPE)tlan_timer;
+	priv->timer.function = tlan_timer;
 	if (!in_irq())
 		spin_unlock_irqrestore(&priv->lock, flags);
 
@@ -1425,7 +1425,7 @@ static u32 tlan_handle_tx_eof(struct net_device *dev, u16 host_int)
 		tlan_dio_write8(dev->base_addr,
 				TLAN_LED_REG, TLAN_LED_LINK | TLAN_LED_ACT);
 		if (priv->timer.function == NULL) {
-			priv->timer.function = (TIMER_FUNC_TYPE)tlan_timer;
+			priv->timer.function = tlan_timer;
 			priv->timer.expires = jiffies + TLAN_TIMER_ACT_DELAY;
 			priv->timer_set_at = jiffies;
 			priv->timer_type = TLAN_TIMER_ACTIVITY;
@@ -1576,7 +1576,7 @@ drop_and_reuse:
 		tlan_dio_write8(dev->base_addr,
 				TLAN_LED_REG, TLAN_LED_LINK | TLAN_LED_ACT);
 		if (priv->timer.function == NULL)  {
-			priv->timer.function = (TIMER_FUNC_TYPE)tlan_timer;
+			priv->timer.function = tlan_timer;
 			priv->timer.expires = jiffies + TLAN_TIMER_ACT_DELAY;
 			priv->timer_set_at = jiffies;
 			priv->timer_type = TLAN_TIMER_ACTIVITY;
diff --git a/drivers/net/hamradio/scc.c b/drivers/net/hamradio/scc.c
index c9f7215c5dc2..3de272959090 100644
--- a/drivers/net/hamradio/scc.c
+++ b/drivers/net/hamradio/scc.c
@@ -1005,7 +1005,7 @@ static void __scc_start_tx_timer(struct scc_channel *scc,
 	} else 
 	if (when != TIMER_OFF)
 	{
-		scc->tx_t.function = (TIMER_FUNC_TYPE)handler;
+		scc->tx_t.function = handler;
 		scc->tx_t.expires = jiffies + (when*HZ)/100;
 		add_timer(&scc->tx_t);
 	}
@@ -1031,7 +1031,7 @@ static void scc_start_defer(struct scc_channel *scc)
 	
 	if (scc->kiss.maxdefer != 0 && scc->kiss.maxdefer != TIMER_OFF)
 	{
-		scc->tx_wdog.function = (TIMER_FUNC_TYPE)t_busy;
+		scc->tx_wdog.function = t_busy;
 		scc->tx_wdog.expires = jiffies + HZ*scc->kiss.maxdefer;
 		add_timer(&scc->tx_wdog);
 	}
@@ -1047,7 +1047,7 @@ static void scc_start_maxkeyup(struct scc_channel *scc)
 	
 	if (scc->kiss.maxkeyup != 0 && scc->kiss.maxkeyup != TIMER_OFF)
 	{
-		scc->tx_wdog.function = (TIMER_FUNC_TYPE)t_maxkeyup;
+		scc->tx_wdog.function = t_maxkeyup;
 		scc->tx_wdog.expires = jiffies + HZ*scc->kiss.maxkeyup;
 		add_timer(&scc->tx_wdog);
 	}
@@ -1428,7 +1428,7 @@ scc_start_calibrate(struct scc_channel *scc, int duration, unsigned char pattern
 
 	del_timer(&scc->tx_wdog);
 
-	scc->tx_wdog.function = (TIMER_FUNC_TYPE)scc_stop_calibrate;
+	scc->tx_wdog.function = scc_stop_calibrate;
 	scc->tx_wdog.expires = jiffies + HZ*duration;
 	add_timer(&scc->tx_wdog);
 
diff --git a/drivers/net/wireless/quantenna/qtnfmac/cfg80211.c b/drivers/net/wireless/quantenna/qtnfmac/cfg80211.c
index 7d6dc76c930a..6711e7fb6926 100644
--- a/drivers/net/wireless/quantenna/qtnfmac/cfg80211.c
+++ b/drivers/net/wireless/quantenna/qtnfmac/cfg80211.c
@@ -554,7 +554,7 @@ qtnf_scan(struct wiphy *wiphy, struct cfg80211_scan_request *request)
 		return -EFAULT;
 	}
 
-	mac->scan_timeout.function = (TIMER_FUNC_TYPE)qtnf_scan_timeout;
+	mac->scan_timeout.function = qtnf_scan_timeout;
 	mod_timer(&mac->scan_timeout,
 		  jiffies + QTNF_SCAN_TIMEOUT_SEC * HZ);
 
diff --git a/drivers/net/wireless/ray_cs.c b/drivers/net/wireless/ray_cs.c
index d8afcdfca1ed..0133fcd4601b 100644
--- a/drivers/net/wireless/ray_cs.c
+++ b/drivers/net/wireless/ray_cs.c
@@ -569,7 +569,7 @@ static int dl_startup_params(struct net_device *dev)
 	local->card_status = CARD_DL_PARAM;
 	/* Start kernel timer to wait for dl startup to complete. */
 	local->timer.expires = jiffies + HZ / 2;
-	local->timer.function = (TIMER_FUNC_TYPE)verify_dl_startup;
+	local->timer.function = verify_dl_startup;
 	add_timer(&local->timer);
 	dev_dbg(&link->dev,
 	      "ray_cs dl_startup_params started timer for verify_dl_startup\n");
@@ -1947,12 +1947,12 @@ static irqreturn_t ray_interrupt(int irq, void *dev_id)
 					dev_dbg(&link->dev,
 					      "ray_cs interrupt network \"%s\" start failed\n",
 					      memtmp);
-					local->timer.function = (TIMER_FUNC_TYPE)start_net;
+					local->timer.function = start_net;
 				} else {
 					dev_dbg(&link->dev,
 					      "ray_cs interrupt network \"%s\" join failed\n",
 					      memtmp);
-					local->timer.function = (TIMER_FUNC_TYPE)join_net;
+					local->timer.function = join_net;
 				}
 				add_timer(&local->timer);
 			}
@@ -2417,9 +2417,9 @@ static void authenticate(ray_dev_t *local)
 
 	del_timer(&local->timer);
 	if (build_auth_frame(local, local->bss_id, OPEN_AUTH_REQUEST)) {
-		local->timer.function = (TIMER_FUNC_TYPE)join_net;
+		local->timer.function = join_net;
 	} else {
-		local->timer.function = (TIMER_FUNC_TYPE)authenticate_timeout;
+		local->timer.function = authenticate_timeout;
 	}
 	local->timer.expires = jiffies + HZ * 2;
 	add_timer(&local->timer);
@@ -2502,7 +2502,7 @@ static void associate(ray_dev_t *local)
 
 		del_timer(&local->timer);
 		local->timer.expires = jiffies + HZ * 2;
-		local->timer.function = (TIMER_FUNC_TYPE)join_net;
+		local->timer.function = join_net;
 		add_timer(&local->timer);
 		local->card_status = CARD_ASSOC_FAILED;
 		return;
diff --git a/drivers/s390/char/sclp.c b/drivers/s390/char/sclp.c
index 9b4c61c1e309..e4e2df7a478e 100644
--- a/drivers/s390/char/sclp.c
+++ b/drivers/s390/char/sclp.c
@@ -158,7 +158,7 @@ static inline void
 __sclp_set_request_timer(unsigned long time, void (*cb)(struct timer_list *))
 {
 	del_timer(&sclp_request_timer);
-	sclp_request_timer.function = (TIMER_FUNC_TYPE)cb;
+	sclp_request_timer.function = cb;
 	sclp_request_timer.expires = jiffies + time;
 	add_timer(&sclp_request_timer);
 }
@@ -566,7 +566,7 @@ sclp_sync_wait(void)
 		if (timer_pending(&sclp_request_timer) &&
 		    get_tod_clock_fast() > timeout &&
 		    del_timer(&sclp_request_timer))
-			sclp_request_timer.function((TIMER_DATA_TYPE)&sclp_request_timer);
+			sclp_request_timer.function(&sclp_request_timer);
 		cpu_relax();
 	}
 	local_irq_disable();
diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
index 51b81c0a0652..b12cb81ad8a2 100644
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -34,7 +34,7 @@ static void zfcp_fsf_request_timeout_handler(struct timer_list *t)
 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
 				 unsigned long timeout)
 {
-	fsf_req->timer.function = (TIMER_FUNC_TYPE)zfcp_fsf_request_timeout_handler;
+	fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
 	fsf_req->timer.expires = jiffies + timeout;
 	add_timer(&fsf_req->timer);
 }
@@ -42,7 +42,7 @@ static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
 {
 	BUG_ON(!fsf_req->erp_action);
-	fsf_req->timer.function = (TIMER_FUNC_TYPE)zfcp_erp_timeout_handler;
+	fsf_req->timer.function = zfcp_erp_timeout_handler;
 	fsf_req->timer.expires = jiffies + 30 * HZ;
 	add_timer(&fsf_req->timer);
 }
diff --git a/drivers/scsi/aic94xx/aic94xx_hwi.c b/drivers/scsi/aic94xx/aic94xx_hwi.c
index 5402b85b0bdc..2dbc8330d7d3 100644
--- a/drivers/scsi/aic94xx/aic94xx_hwi.c
+++ b/drivers/scsi/aic94xx/aic94xx_hwi.c
@@ -1175,7 +1175,7 @@ static void asd_start_scb_timers(struct list_head *list)
 	struct asd_ascb *ascb;
 	list_for_each_entry(ascb, list, list) {
 		if (!ascb->uldd_timer) {
-			ascb->timer.function = (TIMER_FUNC_TYPE)asd_ascb_timedout;
+			ascb->timer.function = asd_ascb_timedout;
 			ascb->timer.expires = jiffies + AIC94XX_SCB_TIMEOUT;
 			add_timer(&ascb->timer);
 		}
diff --git a/drivers/scsi/aic94xx/aic94xx_tmf.c b/drivers/scsi/aic94xx/aic94xx_tmf.c
index 4637119c09d8..2a01702d5ba7 100644
--- a/drivers/scsi/aic94xx/aic94xx_tmf.c
+++ b/drivers/scsi/aic94xx/aic94xx_tmf.c
@@ -42,7 +42,7 @@ static int asd_enqueue_internal(struct asd_ascb *ascb,
 	ascb->tasklet_complete = tasklet_complete;
 	ascb->uldd_timer = 1;
 
-	ascb->timer.function = (TIMER_FUNC_TYPE)timed_out;
+	ascb->timer.function = timed_out;
 	ascb->timer.expires = jiffies + AIC94XX_SCB_TIMEOUT;
 
 	add_timer(&ascb->timer);
diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c
index be96aa1e5077..b3cfdd5f4d1c 100644
--- a/drivers/scsi/be2iscsi/be_main.c
+++ b/drivers/scsi/be2iscsi/be_main.c
@@ -5279,7 +5279,7 @@ static void beiscsi_hw_health_check(struct timer_list *t)
 		if (!test_bit(BEISCSI_HBA_UER_SUPP, &phba->state))
 			return;
 		/* modify this timer to check TPE */
-		phba->hw_check.function = (TIMER_FUNC_TYPE)beiscsi_hw_tpe_check;
+		phba->hw_check.function = beiscsi_hw_tpe_check;
 	}
 
 	mod_timer(&phba->hw_check,
@@ -5367,7 +5367,7 @@ static int beiscsi_enable_port(struct beiscsi_hba *phba)
 	 * Timer function gets modified for TPE detection.
 	 * Always reinit to do health check first.
 	 */
-	phba->hw_check.function = (TIMER_FUNC_TYPE)beiscsi_hw_health_check;
+	phba->hw_check.function = beiscsi_hw_health_check;
 	mod_timer(&phba->hw_check,
 		  jiffies + msecs_to_jiffies(BEISCSI_UE_DETECT_INTERVAL));
 	return 0;
diff --git a/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c b/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c
index babd79361a46..bf07735275a4 100644
--- a/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c
+++ b/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c
@@ -586,8 +586,8 @@ static int do_act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
 	cxgbi_sock_get(csk);
 	spin_lock_bh(&csk->lock);
 	if (rpl->status == CPL_ERR_CONN_EXIST &&
-	    csk->retry_timer.function != (TIMER_FUNC_TYPE)act_open_retry_timer) {
-		csk->retry_timer.function = (TIMER_FUNC_TYPE)act_open_retry_timer;
+	    csk->retry_timer.function != act_open_retry_timer) {
+		csk->retry_timer.function = act_open_retry_timer;
 		mod_timer(&csk->retry_timer, jiffies + HZ / 2);
 	} else
 		cxgbi_sock_fail_act_open(csk,
diff --git a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
index 266eddf17a99..406e94312d4e 100644
--- a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
+++ b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
@@ -963,8 +963,8 @@ static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
 	spin_lock_bh(&csk->lock);
 
 	if (status == CPL_ERR_CONN_EXIST &&
-	    csk->retry_timer.function != (TIMER_FUNC_TYPE)csk_act_open_retry_timer) {
-		csk->retry_timer.function = (TIMER_FUNC_TYPE)csk_act_open_retry_timer;
+	    csk->retry_timer.function != csk_act_open_retry_timer) {
+		csk->retry_timer.function = csk_act_open_retry_timer;
 		mod_timer(&csk->retry_timer, jiffies + HZ / 2);
 	} else
 		cxgbi_sock_fail_act_open(csk,
diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index 61a85ff8e459..5f503cb09508 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -839,7 +839,7 @@ static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
 		}
 		task->task_done = hisi_sas_task_done;
 
-		task->slow_task->timer.function = (TIMER_FUNC_TYPE)hisi_sas_tmf_timedout;
+		task->slow_task->timer.function = hisi_sas_tmf_timedout;
 		task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
 		add_timer(&task->slow_task->timer);
 
@@ -1451,7 +1451,7 @@ hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
 	task->dev = device;
 	task->task_proto = device->tproto;
 	task->task_done = hisi_sas_task_done;
-	task->slow_task->timer.function = (TIMER_FUNC_TYPE)hisi_sas_tmf_timedout;
+	task->slow_task->timer.function = hisi_sas_tmf_timedout;
 	task->slow_task->timer.expires = jiffies + msecs_to_jiffies(110);
 	add_timer(&task->slow_task->timer);
 
diff --git a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
index d02c2a791981..5d3467fd728d 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
@@ -1268,7 +1268,7 @@ static void link_timeout_enable_link(struct timer_list *t)
 		}
 	}
 
-	hisi_hba->timer.function = (TIMER_FUNC_TYPE)link_timeout_disable_link;
+	hisi_hba->timer.function = link_timeout_disable_link;
 	mod_timer(&hisi_hba->timer, jiffies + msecs_to_jiffies(900));
 }
 
@@ -1289,13 +1289,13 @@ static void link_timeout_disable_link(struct timer_list *t)
 		}
 	}
 
-	hisi_hba->timer.function = (TIMER_FUNC_TYPE)link_timeout_enable_link;
+	hisi_hba->timer.function = link_timeout_enable_link;
 	mod_timer(&hisi_hba->timer, jiffies + msecs_to_jiffies(100));
 }
 
 static void set_link_timer_quirk(struct hisi_hba *hisi_hba)
 {
-	hisi_hba->timer.function = (TIMER_FUNC_TYPE)link_timeout_disable_link;
+	hisi_hba->timer.function = link_timeout_disable_link;
 	hisi_hba->timer.expires = jiffies + msecs_to_jiffies(1000);
 	add_timer(&hisi_hba->timer);
 }
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index d53429371127..cc0187965eee 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -997,7 +997,7 @@ static void ipr_do_req(struct ipr_cmnd *ipr_cmd,
 	ipr_cmd->done = done;
 
 	ipr_cmd->timer.expires = jiffies + timeout;
-	ipr_cmd->timer.function = (TIMER_FUNC_TYPE)timeout_func;
+	ipr_cmd->timer.function = timeout_func;
 
 	add_timer(&ipr_cmd->timer);
 
@@ -8312,7 +8312,7 @@ static void ipr_reset_start_timer(struct ipr_cmnd *ipr_cmd,
 	ipr_cmd->done = ipr_reset_ioa_job;
 
 	ipr_cmd->timer.expires = jiffies + timeout;
-	ipr_cmd->timer.function = (TIMER_FUNC_TYPE)ipr_reset_timer_done;
+	ipr_cmd->timer.function = ipr_reset_timer_done;
 	add_timer(&ipr_cmd->timer);
 }
 
@@ -8397,7 +8397,7 @@ static int ipr_reset_next_stage(struct ipr_cmnd *ipr_cmd)
 	}
 
 	ipr_cmd->timer.expires = jiffies + stage_time * HZ;
-	ipr_cmd->timer.function = (TIMER_FUNC_TYPE)ipr_oper_timeout;
+	ipr_cmd->timer.function = ipr_oper_timeout;
 	ipr_cmd->done = ipr_reset_ioa_job;
 	add_timer(&ipr_cmd->timer);
 
@@ -8468,7 +8468,7 @@ static int ipr_reset_enable_ioa(struct ipr_cmnd *ipr_cmd)
 	}
 
 	ipr_cmd->timer.expires = jiffies + (ioa_cfg->transop_timeout * HZ);
-	ipr_cmd->timer.function = (TIMER_FUNC_TYPE)ipr_oper_timeout;
+	ipr_cmd->timer.function = ipr_oper_timeout;
 	ipr_cmd->done = ipr_reset_ioa_job;
 	add_timer(&ipr_cmd->timer);
 	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index 1a4e701a8449..4fae253d4f3d 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -1214,7 +1214,7 @@ static int fc_fcp_cmd_send(struct fc_lport *lport, struct fc_fcp_pkt *fsp,
 	fsp->seq_ptr = seq;
 	fc_fcp_pkt_hold(fsp);	/* hold for fc_fcp_pkt_destroy */
 
-	fsp->timer.function = (TIMER_FUNC_TYPE)fc_fcp_timeout;
+	fsp->timer.function = fc_fcp_timeout;
 	if (rpriv->flags & FC_RP_FLAGS_REC_SUPPORTED)
 		fc_fcp_timer_set(fsp, get_fsp_rec_tov(fsp));
 
@@ -1307,7 +1307,7 @@ static void fc_lun_reset_send(struct timer_list *t)
 			return;
 		if (fc_fcp_lock_pkt(fsp))
 			return;
-		fsp->timer.function = (TIMER_FUNC_TYPE)fc_lun_reset_send;
+		fsp->timer.function = fc_lun_reset_send;
 		fc_fcp_timer_set(fsp, get_fsp_rec_tov(fsp));
 		fc_fcp_unlock_pkt(fsp);
 	}
@@ -1445,7 +1445,7 @@ static void fc_fcp_timeout(struct timer_list *t)
 	if (fsp->lp->qfull) {
 		FC_FCP_DBG(fsp, "fcp timeout, resetting timer delay %d\n",
 			   fsp->timer_delay);
-		fsp->timer.function = (TIMER_FUNC_TYPE)fc_fcp_timeout;
+		fsp->timer.function = fc_fcp_timeout;
 		fc_fcp_timer_set(fsp, fsp->timer_delay);
 		goto unlock;
 	}
diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
index 174e5eff6155..ca1566237ae7 100644
--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -92,7 +92,7 @@ static int smp_execute_task_sg(struct domain_device *dev,
 
 		task->task_done = smp_task_done;
 
-		task->slow_task->timer.function = (TIMER_FUNC_TYPE)smp_task_timedout;
+		task->slow_task->timer.function = smp_task_timedout;
 		task->slow_task->timer.expires = jiffies + SMP_TIMEOUT*HZ;
 		add_timer(&task->slow_task->timer);
 
diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c
index 91795eb56206..58476b728c57 100644
--- a/drivers/scsi/libsas/sas_scsi_host.c
+++ b/drivers/scsi/libsas/sas_scsi_host.c
@@ -919,7 +919,7 @@ void sas_task_abort(struct sas_task *task)
 			return;
 		if (!del_timer(&slow->timer))
 			return;
-		slow->timer.function((TIMER_DATA_TYPE)&slow->timer);
+		slow->timer.function(&slow->timer);
 		return;
 	}
 
diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c
index cff1c37b8d2e..cff43bd9f675 100644
--- a/drivers/scsi/mvsas/mv_sas.c
+++ b/drivers/scsi/mvsas/mv_sas.c
@@ -1310,7 +1310,7 @@ static int mvs_exec_internal_tmf_task(struct domain_device *dev,
 		memcpy(&task->ssp_task, parameter, para_len);
 		task->task_done = mvs_task_done;
 
-		task->slow_task->timer.function = (TIMER_FUNC_TYPE)mvs_tmf_timedout;
+		task->slow_task->timer.function = mvs_tmf_timedout;
 		task->slow_task->timer.expires = jiffies + MVS_TASK_TIMEOUT*HZ;
 		add_timer(&task->slow_task->timer);
 
@@ -2020,7 +2020,7 @@ void mvs_int_port(struct mvs_info *mvi, int phy_no, u32 events)
 		MVS_CHIP_DISP->write_port_irq_mask(mvi, phy_no,
 					tmp | PHYEV_SIG_FIS);
 		if (phy->timer.function == NULL) {
-			phy->timer.function = (TIMER_FUNC_TYPE)mvs_sig_time_out;
+			phy->timer.function = mvs_sig_time_out;
 			phy->timer.expires = jiffies + 5*HZ;
 			add_timer(&phy->timer);
 		}
diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c
index 0e294e80c169..947d6017d004 100644
--- a/drivers/scsi/pm8001/pm8001_sas.c
+++ b/drivers/scsi/pm8001/pm8001_sas.c
@@ -695,7 +695,7 @@ static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
 		task->task_proto = dev->tproto;
 		memcpy(&task->ssp_task, parameter, para_len);
 		task->task_done = pm8001_task_done;
-		task->slow_task->timer.function = (TIMER_FUNC_TYPE)pm8001_tmf_timedout;
+		task->slow_task->timer.function = pm8001_tmf_timedout;
 		task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
 		add_timer(&task->slow_task->timer);
 
@@ -781,7 +781,7 @@ pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 		task->dev = dev;
 		task->task_proto = dev->tproto;
 		task->task_done = pm8001_task_done;
-		task->slow_task->timer.function = (TIMER_FUNC_TYPE)pm8001_tmf_timedout;
+		task->slow_task->timer.function = pm8001_tmf_timedout;
 		task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
 		add_timer(&task->slow_task->timer);
 
diff --git a/drivers/scsi/pmcraid.c b/drivers/scsi/pmcraid.c
index 4f9f115fb6a0..e58be98430b0 100644
--- a/drivers/scsi/pmcraid.c
+++ b/drivers/scsi/pmcraid.c
@@ -604,7 +604,7 @@ static void pmcraid_start_bist(struct pmcraid_cmd *cmd)
 
 	cmd->time_left = msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
 	cmd->timer.expires = jiffies + msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
-	cmd->timer.function = (TIMER_FUNC_TYPE)pmcraid_bist_done;
+	cmd->timer.function = pmcraid_bist_done;
 	add_timer(&cmd->timer);
 }
 
@@ -636,7 +636,7 @@ static void pmcraid_reset_alert_done(struct timer_list *t)
 		/* restart timer if some more time is available to wait */
 		cmd->time_left -= PMCRAID_CHECK_FOR_RESET_TIMEOUT;
 		cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
-		cmd->timer.function = (TIMER_FUNC_TYPE)pmcraid_reset_alert_done;
+		cmd->timer.function = pmcraid_reset_alert_done;
 		add_timer(&cmd->timer);
 	}
 }
@@ -673,7 +673,7 @@ static void pmcraid_reset_alert(struct pmcraid_cmd *cmd)
 		 */
 		cmd->time_left = PMCRAID_RESET_TIMEOUT;
 		cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
-		cmd->timer.function = (TIMER_FUNC_TYPE)pmcraid_reset_alert_done;
+		cmd->timer.function = pmcraid_reset_alert_done;
 		add_timer(&cmd->timer);
 
 		iowrite32(DOORBELL_IOA_RESET_ALERT,
@@ -923,7 +923,7 @@ static void pmcraid_send_cmd(
 	if (timeout_func) {
 		/* setup timeout handler */
 		cmd->timer.expires = jiffies + timeout;
-		cmd->timer.function = (TIMER_FUNC_TYPE)timeout_func;
+		cmd->timer.function = timeout_func;
 		add_timer(&cmd->timer);
 	}
 
@@ -1951,7 +1951,7 @@ static void pmcraid_soft_reset(struct pmcraid_cmd *cmd)
 	cmd->cmd_done = pmcraid_ioa_reset;
 	cmd->timer.expires = jiffies +
 			     msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT);
-	cmd->timer.function = (TIMER_FUNC_TYPE)pmcraid_timeout_handler;
+	cmd->timer.function = pmcraid_timeout_handler;
 
 	if (!timer_pending(&cmd->timer))
 		add_timer(&cmd->timer);
diff --git a/drivers/staging/irda/include/net/irda/timer.h b/drivers/staging/irda/include/net/irda/timer.h
index a6635f0afae9..6dab15f5dae1 100644
--- a/drivers/staging/irda/include/net/irda/timer.h
+++ b/drivers/staging/irda/include/net/irda/timer.h
@@ -75,7 +75,7 @@ struct lap_cb;
 static inline void irda_start_timer(struct timer_list *ptimer, int timeout,
 				    void (*callback)(struct timer_list *))
 {
-	ptimer->function = (TIMER_FUNC_TYPE) callback;
+	ptimer->function =  callback;
 
 	/* Set new value for timer (update or add timer).
 	 * We use mod_timer() because it's more efficient and also
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index d64afdd93872..9342fc2ee7df 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -325,7 +325,7 @@ static int univ8250_setup_irq(struct uart_8250_port *up)
 	if (up->bugs & UART_BUG_THRE) {
 		pr_debug("ttyS%d - using backup timer\n", serial_index(port));
 
-		up->timer.function = (TIMER_FUNC_TYPE)serial8250_backup_timeout;
+		up->timer.function = serial8250_backup_timeout;
 		mod_timer(&up->timer, jiffies +
 			  uart_poll_timeout(port) + HZ / 5);
 	}
@@ -348,7 +348,7 @@ static void univ8250_release_irq(struct uart_8250_port *up)
 	struct uart_port *port = &up->port;
 
 	del_timer_sync(&up->timer);
-	up->timer.function = (TIMER_FUNC_TYPE)serial8250_timeout;
+	up->timer.function = serial8250_timeout;
 	if (port->irq)
 		serial_unlink_irq_chain(up);
 }
diff --git a/include/linux/kthread.h b/include/linux/kthread.h
index dc850d257ea2..c1961761311d 100644
--- a/include/linux/kthread.h
+++ b/include/linux/kthread.h
@@ -118,7 +118,7 @@ struct kthread_delayed_work {
 
 #define KTHREAD_DELAYED_WORK_INIT(dwork, fn) {				\
 	.work = KTHREAD_WORK_INIT((dwork).work, (fn)),			\
-	.timer = __TIMER_INITIALIZER((TIMER_FUNC_TYPE)kthread_delayed_work_timer_fn,\
+	.timer = __TIMER_INITIALIZER(kthread_delayed_work_timer_fn,\
 				     TIMER_IRQSAFE),			\
 	}
 
diff --git a/include/linux/timer.h b/include/linux/timer.h
index b1ae64b112c2..04af640ea95b 100644
--- a/include/linux/timer.h
+++ b/include/linux/timer.h
@@ -63,9 +63,6 @@ struct timer_list {
 
 #define TIMER_TRACE_FLAGMASK	(TIMER_MIGRATING | TIMER_DEFERRABLE | TIMER_PINNED | TIMER_IRQSAFE)
 
-#define TIMER_DATA_TYPE		struct timer_list *
-#define TIMER_FUNC_TYPE		void (*)(TIMER_DATA_TYPE)
-
 #define __TIMER_INITIALIZER(_function, _flags) {		\
 		.entry = { .next = TIMER_ENTRY_STATIC },	\
 		.function = (_function),			\
@@ -76,7 +73,7 @@ struct timer_list {
 
 #define DEFINE_TIMER(_name, _function)				\
 	struct timer_list _name =				\
-		__TIMER_INITIALIZER((TIMER_FUNC_TYPE)_function, 0)
+		__TIMER_INITIALIZER(_function, 0)
 
 /*
  * LOCKDEP and DEBUG timer interfaces.
diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index bff39faba793..4a54ef96aff5 100644
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h
@@ -176,7 +176,7 @@ struct execute_work {
 
 #define __DELAYED_WORK_INITIALIZER(n, f, tflags) {			\
 	.work = __WORK_INITIALIZER((n).work, (f)),			\
-	.timer = __TIMER_INITIALIZER((TIMER_FUNC_TYPE)delayed_work_timer_fn,\
+	.timer = __TIMER_INITIALIZER(delayed_work_timer_fn,\
 				     (tflags) | TIMER_IRQSAFE),		\
 	}
 
diff --git a/kernel/kthread.c b/kernel/kthread.c
index 8af313081b0d..cd50e99202b0 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -843,7 +843,7 @@ void __kthread_queue_delayed_work(struct kthread_worker *worker,
 	struct timer_list *timer = &dwork->timer;
 	struct kthread_work *work = &dwork->work;
 
-	WARN_ON_ONCE(timer->function != (TIMER_FUNC_TYPE)kthread_delayed_work_timer_fn);
+	WARN_ON_ONCE(timer->function != kthread_delayed_work_timer_fn);
 
 	/*
 	 * If @delay is 0, queue @dwork->work immediately.  This is for
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index dde6298f6b22..8fdb710bfdd7 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -1509,7 +1509,7 @@ static void __queue_delayed_work(int cpu, struct workqueue_struct *wq,
 	struct work_struct *work = &dwork->work;
 
 	WARN_ON_ONCE(!wq);
-	WARN_ON_ONCE(timer->function != (TIMER_FUNC_TYPE)delayed_work_timer_fn);
+	WARN_ON_ONCE(timer->function != delayed_work_timer_fn);
 	WARN_ON_ONCE(timer_pending(timer));
 	WARN_ON_ONCE(!list_empty(&work->entry));
 
diff --git a/net/atm/lec.c b/net/atm/lec.c
index c976196da3ea..6676e3433261 100644
--- a/net/atm/lec.c
+++ b/net/atm/lec.c
@@ -1798,7 +1798,7 @@ static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
 		else
 			send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
 		entry->timer.expires = jiffies + (1 * HZ);
-		entry->timer.function = (TIMER_FUNC_TYPE)lec_arp_expire_arp;
+		entry->timer.function = lec_arp_expire_arp;
 		add_timer(&entry->timer);
 		found = priv->mcast_vcc;
 	}
@@ -1998,7 +1998,7 @@ lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
 		entry->old_recv_push = old_push;
 		entry->status = ESI_UNKNOWN;
 		entry->timer.expires = jiffies + priv->vcc_timeout_period;
-		entry->timer.function = (TIMER_FUNC_TYPE)lec_arp_expire_vcc;
+		entry->timer.function = lec_arp_expire_vcc;
 		hlist_add_head(&entry->next, &priv->lec_no_forward);
 		add_timer(&entry->timer);
 		dump_arp_table(priv);
@@ -2082,7 +2082,7 @@ lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
 	entry->status = ESI_UNKNOWN;
 	hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
 	entry->timer.expires = jiffies + priv->vcc_timeout_period;
-	entry->timer.function = (TIMER_FUNC_TYPE)lec_arp_expire_vcc;
+	entry->timer.function = lec_arp_expire_vcc;
 	add_timer(&entry->timer);
 	pr_debug("After vcc was added\n");
 	dump_arp_table(priv);
diff --git a/net/can/proc.c b/net/can/proc.c
index d979b3dc49a6..0c59f876fe6f 100644
--- a/net/can/proc.c
+++ b/net/can/proc.c
@@ -221,7 +221,7 @@ static int can_stats_proc_show(struct seq_file *m, void *v)
 
 	seq_putc(m, '\n');
 
-	if (net->can.can_stattimer.function == (TIMER_FUNC_TYPE)can_stat_update) {
+	if (net->can.can_stattimer.function == can_stat_update) {
 		seq_printf(m, " %8ld %% total match ratio (RXMR)\n",
 				can_stats->total_rx_match_ratio);
 
@@ -291,7 +291,7 @@ static int can_reset_stats_proc_show(struct seq_file *m, void *v)
 
 	user_reset = 1;
 
-	if (net->can.can_stattimer.function == (TIMER_FUNC_TYPE)can_stat_update) {
+	if (net->can.can_stattimer.function == can_stat_update) {
 		seq_printf(m, "Scheduled statistic reset #%ld.\n",
 				can_pstats->stats_reset + 1);
 	} else {
diff --git a/net/lapb/lapb_timer.c b/net/lapb/lapb_timer.c
index 8bb469cb3abe..5d4ae01951b5 100644
--- a/net/lapb/lapb_timer.c
+++ b/net/lapb/lapb_timer.c
@@ -42,7 +42,7 @@ void lapb_start_t1timer(struct lapb_cb *lapb)
 {
 	del_timer(&lapb->t1timer);
 
-	lapb->t1timer.function = (TIMER_FUNC_TYPE)lapb_t1timer_expiry;
+	lapb->t1timer.function = lapb_t1timer_expiry;
 	lapb->t1timer.expires  = jiffies + lapb->t1;
 
 	add_timer(&lapb->t1timer);
@@ -52,7 +52,7 @@ void lapb_start_t2timer(struct lapb_cb *lapb)
 {
 	del_timer(&lapb->t2timer);
 
-	lapb->t2timer.function = (TIMER_FUNC_TYPE)lapb_t2timer_expiry;
+	lapb->t2timer.function = lapb_t2timer_expiry;
 	lapb->t2timer.expires  = jiffies + lapb->t2;
 
 	add_timer(&lapb->t2timer);
diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index 2dec3583c97d..7ed9d4422a73 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -284,7 +284,7 @@ void nr_destroy_socket(struct sock *sk)
 
 	if (sk_has_allocations(sk)) {
 		/* Defer: outstanding buffers */
-		sk->sk_timer.function = (TIMER_FUNC_TYPE)nr_destroy_timer;
+		sk->sk_timer.function = nr_destroy_timer;
 		sk->sk_timer.expires  = jiffies + 2 * HZ;
 		add_timer(&sk->sk_timer);
 	} else
diff --git a/net/netrom/nr_timer.c b/net/netrom/nr_timer.c
index 43569aea0f5e..cbd51ed5a2d7 100644
--- a/net/netrom/nr_timer.c
+++ b/net/netrom/nr_timer.c
@@ -45,7 +45,7 @@ void nr_init_timers(struct sock *sk)
 	timer_setup(&nr->idletimer, nr_idletimer_expiry, 0);
 
 	/* initialized by sock_init_data */
-	sk->sk_timer.function = (TIMER_FUNC_TYPE)nr_heartbeat_expiry;
+	sk->sk_timer.function = nr_heartbeat_expiry;
 }
 
 void nr_start_t1timer(struct sock *sk)
diff --git a/net/rose/rose_link.c b/net/rose/rose_link.c
index cda4c6678ef1..62055d3069d2 100644
--- a/net/rose/rose_link.c
+++ b/net/rose/rose_link.c
@@ -37,7 +37,7 @@ void rose_start_ftimer(struct rose_neigh *neigh)
 {
 	del_timer(&neigh->ftimer);
 
-	neigh->ftimer.function = (TIMER_FUNC_TYPE)rose_ftimer_expiry;
+	neigh->ftimer.function = rose_ftimer_expiry;
 	neigh->ftimer.expires  =
 		jiffies + msecs_to_jiffies(sysctl_rose_link_fail_timeout);
 
@@ -48,7 +48,7 @@ static void rose_start_t0timer(struct rose_neigh *neigh)
 {
 	del_timer(&neigh->t0timer);
 
-	neigh->t0timer.function = (TIMER_FUNC_TYPE)rose_t0timer_expiry;
+	neigh->t0timer.function = rose_t0timer_expiry;
 	neigh->t0timer.expires  =
 		jiffies + msecs_to_jiffies(sysctl_rose_restart_request_timeout);
 
diff --git a/net/rose/rose_timer.c b/net/rose/rose_timer.c
index ea613b2a9735..74555fb95615 100644
--- a/net/rose/rose_timer.c
+++ b/net/rose/rose_timer.c
@@ -36,7 +36,7 @@ void rose_start_heartbeat(struct sock *sk)
 {
 	del_timer(&sk->sk_timer);
 
-	sk->sk_timer.function = (TIMER_FUNC_TYPE)rose_heartbeat_expiry;
+	sk->sk_timer.function = rose_heartbeat_expiry;
 	sk->sk_timer.expires  = jiffies + 5 * HZ;
 
 	add_timer(&sk->sk_timer);
@@ -48,7 +48,7 @@ void rose_start_t1timer(struct sock *sk)
 
 	del_timer(&rose->timer);
 
-	rose->timer.function = (TIMER_FUNC_TYPE)rose_timer_expiry;
+	rose->timer.function = rose_timer_expiry;
 	rose->timer.expires  = jiffies + rose->t1;
 
 	add_timer(&rose->timer);
@@ -60,7 +60,7 @@ void rose_start_t2timer(struct sock *sk)
 
 	del_timer(&rose->timer);
 
-	rose->timer.function = (TIMER_FUNC_TYPE)rose_timer_expiry;
+	rose->timer.function = rose_timer_expiry;
 	rose->timer.expires  = jiffies + rose->t2;
 
 	add_timer(&rose->timer);
@@ -72,7 +72,7 @@ void rose_start_t3timer(struct sock *sk)
 
 	del_timer(&rose->timer);
 
-	rose->timer.function = (TIMER_FUNC_TYPE)rose_timer_expiry;
+	rose->timer.function = rose_timer_expiry;
 	rose->timer.expires  = jiffies + rose->t3;
 
 	add_timer(&rose->timer);
@@ -84,7 +84,7 @@ void rose_start_hbtimer(struct sock *sk)
 
 	del_timer(&rose->timer);
 
-	rose->timer.function = (TIMER_FUNC_TYPE)rose_timer_expiry;
+	rose->timer.function = rose_timer_expiry;
 	rose->timer.expires  = jiffies + rose->hb;
 
 	add_timer(&rose->timer);
@@ -97,7 +97,7 @@ void rose_start_idletimer(struct sock *sk)
 	del_timer(&rose->idletimer);
 
 	if (rose->idle > 0) {
-		rose->idletimer.function = (TIMER_FUNC_TYPE)rose_idletimer_expiry;
+		rose->idletimer.function = rose_idletimer_expiry;
 		rose->idletimer.expires  = jiffies + rose->idle;
 
 		add_timer(&rose->idletimer);
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index e8e0831229cf..f9307bd6644b 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -745,7 +745,7 @@ static void svc_add_new_temp_xprt(struct svc_serv *serv, struct svc_xprt *newxpt
 	serv->sv_tmpcnt++;
 	if (serv->sv_temptimer.function == NULL) {
 		/* setup timer to age temp transports */
-		serv->sv_temptimer.function = (TIMER_FUNC_TYPE)svc_age_temp_xprts;
+		serv->sv_temptimer.function = svc_age_temp_xprts;
 		mod_timer(&serv->sv_temptimer,
 			  jiffies + svc_conn_age_period * HZ);
 	}
diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
index ea87143314f3..562cc11131f6 100644
--- a/net/x25/af_x25.c
+++ b/net/x25/af_x25.c
@@ -415,7 +415,7 @@ static void __x25_destroy_socket(struct sock *sk)
 	if (sk_has_allocations(sk)) {
 		/* Defer: outstanding buffers */
 		sk->sk_timer.expires  = jiffies + 10 * HZ;
-		sk->sk_timer.function = (TIMER_FUNC_TYPE)x25_destroy_timer;
+		sk->sk_timer.function = x25_destroy_timer;
 		add_timer(&sk->sk_timer);
 	} else {
 		/* drop last reference so sock_put will free */
diff --git a/net/x25/x25_timer.c b/net/x25/x25_timer.c
index 1dfba3c23459..fa3461002b3e 100644
--- a/net/x25/x25_timer.c
+++ b/net/x25/x25_timer.c
@@ -36,7 +36,7 @@ void x25_init_timers(struct sock *sk)
 	timer_setup(&x25->timer, x25_timer_expiry, 0);
 
 	/* initialized by sock_init_data */
-	sk->sk_timer.function = (TIMER_FUNC_TYPE)x25_heartbeat_expiry;
+	sk->sk_timer.function = x25_heartbeat_expiry;
 }
 
 void x25_start_heartbeat(struct sock *sk)
diff --git a/sound/usb/line6/driver.c b/sound/usb/line6/driver.c
index 4f9613e5fc9e..c1376bfdc90b 100644
--- a/sound/usb/line6/driver.c
+++ b/sound/usb/line6/driver.c
@@ -201,7 +201,7 @@ static int line6_send_raw_message_async_part(struct message *msg,
 void line6_start_timer(struct timer_list *timer, unsigned long msecs,
 		       void (*function)(struct timer_list *t))
 {
-	timer->function = (TIMER_FUNC_TYPE)function;
+	timer->function = function;
 	mod_timer(timer, jiffies + msecs_to_jiffies(msecs));
 }
 EXPORT_SYMBOL_GPL(line6_start_timer);