From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 908C2C433FE for ; Mon, 8 Nov 2021 10:16:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 74D9F61359 for ; Mon, 8 Nov 2021 10:16:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239028AbhKHKSn (ORCPT ); Mon, 8 Nov 2021 05:18:43 -0500 Received: from mail.skyhub.de ([5.9.137.197]:38352 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230201AbhKHKPI (ORCPT ); Mon, 8 Nov 2021 05:15:08 -0500 Received: from zn.tnic (p200300ec2f33110088892b77bd117736.dip0.t-ipconnect.de [IPv6:2003:ec:2f33:1100:8889:2b77:bd11:7736]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 5327A1EC04E0; Mon, 8 Nov 2021 11:12:23 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1636366343; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=O4l6NvOfwI35aQ1VkPm6SxCKClITle3M6ZNdjdLIRBg=; b=WSpP5u0cMlmbvkpd/yxn2hLFcYASp5SC08SldoBh9vaf2jd4B42EPJdAiRV0Kk56CXj8g+ mjLhn8Fnh/UqmPkKRyzReH8owa8MQeATtQYTxR4DExrxXy4/CClIdOBnfs5WIwExf4LMlp 8SBu+OcAl+XApStMqJHw8bnjCXxe68M= From: Borislav Petkov To: LKML Subject: [PATCH v0 19/42] kernel/hung_task: Check notifier registration return value Date: Mon, 8 Nov 2021 11:11:34 +0100 Message-Id: <20211108101157.15189-20-bp@alien8.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20211108101157.15189-1-bp@alien8.de> References: <20211108101157.15189-1-bp@alien8.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Borislav Petkov Avoid homegrown notifier registration checks. No functional changes. Signed-off-by: Borislav Petkov --- kernel/hung_task.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/hung_task.c b/kernel/hung_task.c index 9888e2bc8c76..8e3bb95968a4 100644 --- a/kernel/hung_task.c +++ b/kernel/hung_task.c @@ -304,7 +304,8 @@ static int watchdog(void *dummy) static int __init hung_task_init(void) { - atomic_notifier_chain_register(&panic_notifier_list, &panic_block); + if (atomic_notifier_chain_register(&panic_notifier_list, &panic_block)) + pr_warn("Hung task notifier already registered\n"); /* Disable hung task detector on suspend */ pm_notifier(hungtask_pm_notify, 0); -- 2.29.2