Look for either "init" or "linuxrc" processes
diff --git a/init/reboot.c b/init/reboot.c
index 35c147b..bdcd443 100644
--- a/init/reboot.c
+++ b/init/reboot.c
@@ -29,8 +29,11 @@
 #ifdef BB_FEATURE_LINUXRC
 	/* don't assume init's pid == 1 */
 	pid_t *pid = find_pid_by_name("init");
-	if (!pid || *pid<=0)
-		error_msg_and_die("no process killed");
+	if (!pid || *pid<=0) {
+		pid_t *pid = find_pid_by_name("linuxrc");
+		if (!pid || *pid<=0)
+			error_msg_and_die("no process killed");
+	}
 	return(kill(*pid, SIGTERM));
 #else
 	return(kill(1, SIGTERM));