linux-kernel - [PATCH v0 29/42] arm64: Check notifier registration return value

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Message-Id: <20211108101157.15189-30-bp@alien8.de>
Date:   Mon,  8 Nov 2021 11:11:44 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v0 29/42] arm64: Check notifier registration return value

From: Borislav Petkov <bp@...e.de>

Avoid homegrown notifier registration checks.

No functional changes.

Signed-off-by: Borislav Petkov <bp@...e.de>
Cc: linux-arm-kernel@...ts.infradead.org
---
 arch/arm64/kernel/setup.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index be5f85b0a24d..e66af9de7cd7 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -440,8 +440,10 @@ static struct notifier_block arm64_panic_block = {
 
 static int __init register_arm64_panic_block(void)
 {
-	atomic_notifier_chain_register(&panic_notifier_list,
-				       &arm64_panic_block);
+	if (atomic_notifier_chain_register(&panic_notifier_list,
+					   &arm64_panic_block))
+		pr_warn("Panic notifier already registered\n");
+
 	return 0;
 }
 device_initcall(register_arm64_panic_block);
-- 
2.29.2