diff -urp linux-5.10/3rdparty/rtl8821ce.orig/core/rtw_btcoex.c linux-5.10/3rdparty/rtl8821ce/core/rtw_btcoex.c
--- linux-5.10/3rdparty/rtl8821ce.orig/core/rtw_btcoex.c	2021-01-19 22:18:00.924067581 +0200
+++ linux-5.10/3rdparty/rtl8821ce/core/rtw_btcoex.c	2021-01-19 22:22:20.057518961 +0200
@@ -1474,15 +1474,20 @@ u8 rtw_btcoex_sendmsgbysocket(_adapter *
 	udpmsg.msg_control	= NULL;
 	udpmsg.msg_controllen = 0;
 	udpmsg.msg_flags	= MSG_DONTWAIT | MSG_NOSIGNAL;
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 	oldfs = get_fs();
 	set_fs(KERNEL_DS);
+#endif
 
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 0))
 	error = sock_sendmsg(pcoex_info->udpsock, &udpmsg);
 #else
 	error = sock_sendmsg(pcoex_info->udpsock, &udpmsg, msg_size);
 #endif
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 	set_fs(oldfs);
+#endif
 	if (error < 0) {
 		RTW_INFO("Error when sendimg msg, error:%d\n", error);
 		return _FAIL;
diff -urp linux-5.10/3rdparty/rtl8821ce.orig/core/rtw_wlan_util.c linux-5.10/3rdparty/rtl8821ce/core/rtw_wlan_util.c
--- linux-5.10/3rdparty/rtl8821ce.orig/core/rtw_wlan_util.c	2021-01-19 22:18:00.937068206 +0200
+++ linux-5.10/3rdparty/rtl8821ce/core/rtw_wlan_util.c	2021-01-19 22:22:20.067519442 +0200
@@ -4751,8 +4751,10 @@ int rtw_dev_nlo_info_set(struct pno_nlo_
 		return 0;
 	}
 
+#if (LINUX_VERSION_CODE <= KERNEL_VERSION(5, 10, 0))
 	fs = get_fs();
 	set_fs(KERNEL_DS);
+#endif
 
 	source = rtw_zmalloc(2048);
 
@@ -4762,7 +4764,9 @@ int rtw_dev_nlo_info_set(struct pno_nlo_
 		rtw_mfree(source, 2048);
 	}
 
+#if (LINUX_VERSION_CODE <= KERNEL_VERSION(5, 10, 0))
 	set_fs(fs);
+#endif
 	filp_close(fp, NULL);
 
 	RTW_INFO("-%s-\n", __func__);
diff -urp linux-5.10/3rdparty/rtl8821ce.orig/os_dep/linux/os_intfs.c linux-5.10/3rdparty/rtl8821ce/os_dep/linux/os_intfs.c
--- linux-5.10/3rdparty/rtl8821ce.orig/os_dep/linux/os_intfs.c	2021-01-19 22:18:01.078074981 +0200
+++ linux-5.10/3rdparty/rtl8821ce/os_dep/linux/os_intfs.c	2021-01-19 22:22:20.068519490 +0200
@@ -4008,14 +4008,18 @@ static int route_dump(u32 *gw_addr , int
 	msg.msg_controllen = 0;
 	msg.msg_flags = MSG_DONTWAIT;
 
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 	oldfs = get_fs();
 	set_fs(KERNEL_DS);
+#endif
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 0))
 	err = sock_sendmsg(sock, &msg);
 #else
 	err = sock_sendmsg(sock, &msg, sizeof(req));
 #endif
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 	set_fs(oldfs);
+#endif
 
 	if (err < 0)
 		goto out_sock;
@@ -4040,14 +4044,18 @@ restart:
 		iov_iter_init(&msg.msg_iter, READ, &iov, 1, PAGE_SIZE);
 #endif
 
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 		oldfs = get_fs();
 		set_fs(KERNEL_DS);
+#endif
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0))
 		err = sock_recvmsg(sock, &msg, MSG_DONTWAIT);
 #else
 		err = sock_recvmsg(sock, &msg, PAGE_SIZE, MSG_DONTWAIT);
 #endif
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 		set_fs(oldfs);
+#endif
 
 		if (err < 0)
 			goto out_sock_pg;
@@ -4118,14 +4126,18 @@ done:
 		msg.msg_controllen = 0;
 		msg.msg_flags = MSG_DONTWAIT;
 
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 		oldfs = get_fs();
 		set_fs(KERNEL_DS);
+#endif
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 0))
 		err = sock_sendmsg(sock, &msg);
 #else
 		err = sock_sendmsg(sock, &msg, sizeof(req));
 #endif
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 		set_fs(oldfs);
+#endif
 
 		if (err > 0)
 			goto restart;
diff -urp linux-5.10/3rdparty/rtl8821ce.orig/os_dep/osdep_service.c linux-5.10/3rdparty/rtl8821ce/os_dep/osdep_service.c
--- linux-5.10/3rdparty/rtl8821ce.orig/os_dep/osdep_service.c	2021-01-19 22:18:01.081075125 +0200
+++ linux-5.10/3rdparty/rtl8821ce/os_dep/osdep_service.c	2021-01-19 22:22:20.068519490 +0200
@@ -2200,8 +2200,10 @@ static int isFileReadable(const char *pa
 	if (IS_ERR(fp))
 		ret = PTR_ERR(fp);
 	else {
+	#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 		oldfs = get_fs();
 		set_fs(KERNEL_DS);
+	#endif
 
 		if (1 != readFile(fp, &buf, 1))
 			ret = PTR_ERR(fp);
@@ -2214,7 +2216,9 @@ static int isFileReadable(const char *pa
 			#endif
 		}
 
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 		set_fs(oldfs);
+#endif
 		filp_close(fp, NULL);
 	}
 	return ret;
@@ -2238,10 +2242,14 @@ static int retriveFromFile(const char *p
 		if (0 == ret) {
 			RTW_INFO("%s openFile path:%s fp=%p\n", __FUNCTION__, path , fp);
 
+		#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 			oldfs = get_fs();
 			set_fs(KERNEL_DS);
+		#endif
 			ret = readFile(fp, buf, sz);
+		#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 			set_fs(oldfs);
+		#endif
 			closeFile(fp);
 
 			RTW_INFO("%s readFile, ret:%d\n", __FUNCTION__, ret);
@@ -2273,10 +2281,14 @@ static int storeToFile(const char *path,
 		if (0 == ret) {
 			RTW_INFO("%s openFile path:%s fp=%p\n", __FUNCTION__, path , fp);
 
+		#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 			oldfs = get_fs();
 			set_fs(KERNEL_DS);
+		#endif
 			ret = writeFile(fp, buf, sz);
+		#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 			set_fs(oldfs);
+		#endif
 			closeFile(fp);
 
 			RTW_INFO("%s writeFile, ret:%d\n", __FUNCTION__, ret);