From: Borislav Petkov <bp@xxxxxxx>
Avoid homegrown notifier registration checks.
No functional changes.
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Cc: rcu@xxxxxxxxxxxxxxx
---
kernel/rcu/tree_stall.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/kernel/rcu/tree_stall.h b/kernel/rcu/tree_stall.h
index 5e2fa6fd97f1..0c1d631214f4 100644
--- a/kernel/rcu/tree_stall.h
+++ b/kernel/rcu/tree_stall.h
@@ -101,7 +101,9 @@ static struct notifier_block rcu_panic_block = {
static int __init check_cpu_stall_init(void)
{
- atomic_notifier_chain_register(&panic_notifier_list, &rcu_panic_block);
+ if (atomic_notifier_chain_register(&panic_notifier_list, &rcu_panic_block))
+ pr_warn("RCU warning suppress notifier already registered\n");
+
return 0;
}
early_initcall(check_cpu_stall_init);
--
2.29.2
