Re: [PATCH -tip v3 1/2] kcov: Make runtime functions noinstr-compatible

[Peter Zijlstra]

On Mon, Jun 15, 2020 at 04:29:50PM +0200, Peter Zijlstra wrote:
> Let me go look at your KCSAN thing now...

vmlinux.o: warning: objtool: idtentry_enter_cond_rcu()+0x16: call to is_idle_task() leaves .noinstr.text section

---
diff --git a/include/linux/sched.h b/include/linux/sched.h
index b62e6aaf28f03..a7abc18a7d0ad 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1663,7 +1663,7 @@ extern struct task_struct *idle_task(int cpu);
  *
  * Return: 1 if @p is an idle task. 0 otherwise.
  */
-static inline bool is_idle_task(const struct task_struct *p)
+static __always_inline bool is_idle_task(const struct task_struct *p)
 {
 	return !!(p->flags & PF_IDLE);
 }