diff --git a/include/linux/sched/frame_rtg.h b/include/linux/sched/frame_rtg.h
index 71ecf65c599e4b469c92ab5fe50c7cc84e581d4f..added0ed2c11bd2cc59a4c41dde2b1370fd58572 100644
--- a/include/linux/sched/frame_rtg.h
+++ b/include/linux/sched/frame_rtg.h
@@ -21,7 +21,7 @@ struct frame_info {
 	 * rtg->prev_window_exec  -=> the thread's runtime of last frame
 	 * rtg->prev_window_time  -=> the actual time of the last frame
 	 */
-	rwlock_t lock;
+	struct mutex lock;
 	struct related_thread_group *rtg;
 	int prio;
 	struct task_struct *thread[MAX_TID_NUM];
diff --git a/kernel/sched/rtg/frame_rtg.c b/kernel/sched/rtg/frame_rtg.c
index 686705e91cff5e267619f973dd969fa402e52b91..293fb03e36e2e73c38f3987d0aad77a3f7b9ef21 100644
--- a/kernel/sched/rtg/frame_rtg.c
+++ b/kernel/sched/rtg/frame_rtg.c
@@ -381,14 +381,14 @@ void set_frame_prio(struct frame_info *frame_info, int prio)
 	if (!frame_info)
 		return;
 
-	write_lock(&frame_info->lock);
+	mutex_lock(&frame_info->lock);
 	if (frame_info->prio == prio)
 		goto out;
 
 	update_frame_task_prio(frame_info, prio);
 	frame_info->prio = prio;
 out:
-	write_unlock(&frame_info->lock);
+	mutex_unlock(&frame_info->lock);
 }
 
 static int do_set_rtg_sched(struct task_struct *task, bool is_rtg,
@@ -556,7 +556,7 @@ void update_frame_thread_info(struct frame_info *frame_info,
 
 	// reset curr_rt_thread_num
 	atomic_set(&frame_info->curr_rt_thread_num, 0);
-	write_lock(&frame_info->lock);
+	mutex_lock(&frame_info->lock);
 	old_prio = frame_info->prio;
 	real_thread = 0;
 	for (i = 0; i < thread_num; i++) {
@@ -568,7 +568,7 @@ void update_frame_thread_info(struct frame_info *frame_info,
 	}
 	frame_info->prio = prio;
 	frame_info->thread_num = real_thread;
-	write_unlock(&frame_info->lock);
+	mutex_unlock(&frame_info->lock);
 }
 
 static void do_set_frame_sched_state(struct frame_info *frame_info,
@@ -627,14 +627,14 @@ void set_frame_sched_state(struct frame_info *frame_info, bool enable)
 
 	/* reset curr_rt_thread_num */
 	atomic_set(&frame_info->curr_rt_thread_num, 0);
-	write_lock(&frame_info->lock);
+	mutex_lock(&frame_info->lock);
 	prio = frame_info->prio;
 	for (i = 0; i < MAX_TID_NUM; i++) {
 		if (frame_info->thread[i])
 			do_set_frame_sched_state(frame_info, frame_info->thread[i],
 						 enable, prio);
 	}
-	write_unlock(&frame_info->lock);
+	mutex_unlock(&frame_info->lock);
 
 	trace_rtg_frame_sched(frame_info->rtg->id, "FRAME_STATUS",
 			      frame_info->status);
@@ -1165,9 +1165,9 @@ static int _init_frame_info(struct frame_info *frame_info, int id)
 	unsigned long flags;
 
 	memset(frame_info, 0, sizeof(struct frame_info));
-	rwlock_init(&frame_info->lock);
+	mutex_init(&frame_info->lock);
 
-	write_lock(&frame_info->lock);
+	mutex_lock(&frame_info->lock);
 	frame_info->frame_rate = DEFAULT_FRAME_RATE;
 	frame_info->frame_time = div_u64(NSEC_PER_SEC, frame_info->frame_rate);
 	frame_info->thread_num = 0;
@@ -1188,7 +1188,7 @@ static int _init_frame_info(struct frame_info *frame_info, int id)
 
 	grp = frame_rtg(id);
 	if (unlikely(!grp)) {
-		write_unlock(&frame_info->lock);
+		mutex_unlock(&frame_info->lock);
 		return -EINVAL;
 	}
 
@@ -1198,7 +1198,7 @@ static int _init_frame_info(struct frame_info *frame_info, int id)
 	raw_spin_unlock_irqrestore(&grp->lock, flags);
 
 	frame_info->rtg = grp;
-	write_unlock(&frame_info->lock);
+	mutex_unlock(&frame_info->lock);
 
 	return 0;
 }
diff --git a/kernel/sched/rtg/rtg_ctrl.c b/kernel/sched/rtg/rtg_ctrl.c
index 923ed654de6c77486905e5ebda553a749a156d85..231aeaeb0507542bc9c4c6c8ea62cde98be62ecf 100644
--- a/kernel/sched/rtg/rtg_ctrl.c
+++ b/kernel/sched/rtg/rtg_ctrl.c
@@ -162,7 +162,7 @@ static int do_update_rt_frame_num(struct frame_info *frame_info, int new_type)
 	int old_type;
 	int ret = SUCC;
 
-	read_lock(&frame_info->lock);
+	mutex_lock(&frame_info->lock);
 	old_type = frame_info->prio - DEFAULT_RT_PRIO;
 	if (is_rt_type(new_type) == is_rt_type(old_type))
 		goto out;
@@ -180,7 +180,7 @@ static int do_update_rt_frame_num(struct frame_info *frame_info, int new_type)
 		}
 	}
 out:
-	read_unlock(&frame_info->lock);
+	mutex_unlock(&frame_info->lock);
 
 	return ret;
 }
@@ -697,15 +697,15 @@ static int parse_add_rtg_thread(const struct rtg_grp_data *rs_data)
 		pr_err("[SCHED_RTG] grp not created yet.\n");
 		return -INVALID_ARG;
 	}
-	write_lock(&frame_info->lock);
+	mutex_lock(&frame_info->lock);
 	add_num = rs_data->tid_num;
 	if ((frame_info->thread_num < 0) || (add_num < 0)) {
+		mutex_unlock(&frame_info->lock);
 		pr_err("[SCHED_RTG] Unexception err: frame_info num < 0.\n");
-		write_unlock(&frame_info->lock);
 		return -INVALID_RTG_ID;
 	}
 	if (frame_info->thread_num + add_num > MAX_TID_NUM) {
-		write_unlock(&frame_info->lock);
+		mutex_unlock(&frame_info->lock);
 		return -INVALID_RTG_ID;
 	}
 	add_index = frame_info->thread_num;
@@ -721,7 +721,7 @@ static int parse_add_rtg_thread(const struct rtg_grp_data *rs_data)
 			fail_num++;
 		}
 	}
-	write_unlock(&frame_info->lock);
+	mutex_unlock(&frame_info->lock);
 
 	return fail_num;
 }