commit dfb0f170cadb03da4f408ae53cc2908120e1f90e
author Josh Poimboeuf <jpoimboe@kernel.org> Mon Feb 13 23:05:55 2023 -0800
committer Josh Poimboeuf <jpoimboe@kernel.org> Wed Mar 08 08:44:27 2023 -0800
tree a57a9cdbefa38f4aeab3bc08cc76bc0cd01601d8
parent 69dee6f0338a20c76a7bc61c0a6b59f25e1b25c8

sched/idle: Make sure weak version of arch_cpu_idle_dead() doesn't return

arch_cpu_idle_dead() should never return.  Make it so.

Link: https://lore.kernel.org/r/cf5ad95eef50f7704bb30e7770c59bfe23372af7.1676358308.git.jpoimboe@kernel.org
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>

kernel/sched/idle.c

diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c
index e9ef66b..56e152f 100644
--- a/kernel/sched/idle.c
+++ b/kernel/sched/idle.c
@@ -75,7 +75,7 @@ static noinline int __cpuidle cpu_idle_poll(void)
 void __weak arch_cpu_idle_prepare(void) { }
 void __weak arch_cpu_idle_enter(void) { }
 void __weak arch_cpu_idle_exit(void) { }
-void __weak arch_cpu_idle_dead(void) { }
+void __weak arch_cpu_idle_dead(void) { while (1); }
 void __weak arch_cpu_idle(void)
 {
 	cpu_idle_force_poll = 1;