diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c
index 95fd9375a7d8..4de25708b05a 100644
--- a/mm/damon/sysfs.c
+++ b/mm/damon/sysfs.c
@@ -1819,10 +1819,9 @@ static ssize_t pid_show(struct kobject *kobj,
 	if (!ctx)
 		goto out;
 
-	mutex_lock(&ctx->kdamond_lock);
-	if (ctx->kdamond)
-		pid = ctx->kdamond->pid;
-	mutex_unlock(&ctx->kdamond_lock);
+	pid = damon_kdamond_pid(ctx);
+	if (pid < 0)
+		pid = -1;
 out:
 	mutex_unlock(&damon_sysfs_lock);
 	return sysfs_emit(buf, "%d\n", pid);