| From | Borislav Petkov <> | Subject | [PATCH v0 20/42] rcu: Check notifier registration return value | Date | Mon, 8 Nov 2021 11:11:35 +0100 |
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From: Borislav Petkov <bp@suse.de>
Avoid homegrown notifier registration checks.
No functional changes.
Signed-off-by: Borislav Petkov <bp@suse.de> Cc: rcu@vger.kernel.org --- 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
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