From 494cadd44b28002bfb2727a173fae89dd309ff34 Mon Sep 17 00:00:00 2001
From: Adonis Ling <adonis0147@gmail.com>
Date: Mon, 10 Oct 2022 15:43:31 +0800
Subject: [PATCH] Fix "sched_to itself" error when buidling by Clang on Linux
 aarch64

---
 src/bthread/task_group.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/bthread/task_group.cpp b/src/bthread/task_group.cpp
index b8ead16342..94ce5eb784 100644
--- a/src/bthread/task_group.cpp
+++ b/src/bthread/task_group.cpp
@@ -248,6 +248,9 @@ int TaskGroup::init(size_t runqueue_capacity) {
     return 0;
 }
 
+#if defined(__linux__) && defined(__aarch64__) && defined(__clang__)
+    __attribute__((optnone))
+#endif
 void TaskGroup::task_runner(intptr_t skip_remained) {
     // NOTE: tls_task_group is volatile since tasks are moved around
     //       different groups.
@@ -567,6 +570,9 @@ void TaskGroup::sched(TaskGroup** pg) {
     sched_to(pg, next_tid);
 }
 
+#if defined(__linux__) && defined(__aarch64__) && defined(__clang__)
+    __attribute__((optnone))
+#endif
 void TaskGroup::sched_to(TaskGroup** pg, TaskMeta* next_meta) {
     TaskGroup* g = *pg;
 #ifndef NDEBUG