diff --git a/core/rtw_wlan_util.c b/core/rtw_wlan_util.c
index a1b5063..97300c1 100644
--- a/core/rtw_wlan_util.c
+++ b/core/rtw_wlan_util.c
@@ -2428,7 +2428,7 @@ void rtw_debug_rx_bcn(_adapter *adapter, u8 *pframe, u32 packet_len)
 
 	update_TSF(pmlmeext, pframe, packet_len);
 	tsf = pmlmeext->TSFValue;
-	tsf_offset = rtw_modular64(pmlmeext->TSFValue, (mlmeinfo->bcn_interval * 1024));
+	tsf_offset = do_div(pmlmeext->TSFValue, (mlmeinfo->bcn_interval * 1024));
 
 	/*get TIM IE*/
 	/*DTIM Count*/
diff --git a/hal/hal_com.c b/hal/hal_com.c
index f0c7e43..ea558a0 100644
--- a/hal/hal_com.c
+++ b/hal/hal_com.c
@@ -11328,7 +11328,7 @@ static void hw_var_set_correct_tsf(_adapter *adapter, u8 mlme_state)
 	struct mlme_ext_priv *mlmeext = &adapter->mlmeextpriv;
 	struct mlme_ext_info *mlmeinfo = &(mlmeext->mlmext_info);
 
-	tsf = mlmeext->TSFValue - rtw_modular64(mlmeext->TSFValue, (mlmeinfo->bcn_interval * 1024)) - 1024; /*us*/
+	tsf = mlmeext->TSFValue - do_div(mlmeext->TSFValue, (mlmeinfo->bcn_interval * 1024)) - 1024; /*us*/
 
 	if ((mlmeinfo->state & 0x03) == WIFI_FW_ADHOC_STATE
 		|| (mlmeinfo->state & 0x03) == WIFI_FW_AP_STATE)
diff --git a/hal/hal_mcc.c b/hal/hal_mcc.c
index 179d4d5..ac251cb 100644
--- a/hal/hal_mcc.c
+++ b/hal/hal_mcc.c
@@ -753,11 +753,11 @@ static u8 rtw_hal_mcc_update_timing_parameters(PADAPTER padapter, u8 force_updat
 		/* selecet policy table according TSF diff */
 		tsf0 = tsf[0];
 		beaconperiod_0 = pmccobjpriv->iface[0]->mlmepriv.cur_network.network.Configuration.BeaconPeriod;
-		tsf0 = rtw_modular64(tsf0, (beaconperiod_0 * TU));
+		tsf0 = do_div(tsf0, (beaconperiod_0 * TU));
 
 		tsf1 = tsf[1];
 		beaconperiod_1 = pmccobjpriv->iface[1]->mlmepriv.cur_network.network.Configuration.BeaconPeriod;
-		tsf1 = rtw_modular64(tsf1, (beaconperiod_1 * TU));
+		tsf1 = do_div(tsf1, (beaconperiod_1 * TU));
 
 		if (tsf0 > tsf1)
 			tsfdiff = tsf0- tsf1;
diff --git a/include/osdep_service.h b/include/osdep_service.h
index 93f68c4..d26cd9f 100644
--- a/include/osdep_service.h
+++ b/include/osdep_service.h
@@ -622,7 +622,6 @@ extern void rtw_free_netdev(struct net_device *netdev);
 #endif /* PLATFORM_FREEBSD */
 
 
-extern u64 rtw_modular64(u64 x, u64 y);
 extern u64 rtw_division64(u64 x, u64 y);
 extern u32 rtw_random32(void);
 
diff --git a/os_dep/osdep_service.c b/os_dep/osdep_service.c
index f805308..3dc89ca 100644
--- a/os_dep/osdep_service.c
+++ b/os_dep/osdep_service.c
@@ -2433,25 +2433,6 @@ void module_init_exit_wrapper(void *arg)
 }
 
 #endif /* PLATFORM_FREEBSD */
-
-#ifdef CONFIG_PLATFORM_SPRD
-	#ifdef do_div
-		#undef do_div
-	#endif
-	#include <asm-generic/div64.h>
-#endif
-
-u64 rtw_modular64(u64 x, u64 y)
-{
-#ifdef PLATFORM_LINUX
-	return do_div(x, y);
-#elif defined(PLATFORM_WINDOWS)
-	return x % y;
-#elif defined(PLATFORM_FREEBSD)
-	return x % y;
-#endif
-}
-
 u64 rtw_division64(u64 x, u64 y)
 {
 #ifdef PLATFORM_LINUX