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 CC2E4C433F5 for ; Mon, 8 Nov 2021 10:12:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A211D60FC1 for ; Mon, 8 Nov 2021 10:12:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237747AbhKHKO7 (ORCPT ); Mon, 8 Nov 2021 05:14:59 -0500 Received: from mail.skyhub.de ([5.9.137.197]:38202 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230462AbhKHKOy (ORCPT ); Mon, 8 Nov 2021 05:14:54 -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 BABC81EC04E0; Mon, 8 Nov 2021 11:12:09 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1636366329; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=grdSLe+txR+qPcky5ijEGsjPCSkRE9m2uQKOXesimzE=; b=OveTWrDzAdrOoSEwa1Av97jBWR5pZb8d7IM/QcE2Bm0tLy+LKZctYgVNu/8HPp+khPKy8S fBJxFCpTfhDSa0lqOVDygpDhEY+AGd64/coDHahUOeAP4LgJ5PPdM1pvgt1eBYUTFfAiTM J8ofTFwzerbk/CRlwmeCnSLXSqeLzqY= From: Borislav Petkov To: LKML Cc: xen-devel@lists.xenproject.org Subject: [PATCH v0 02/42] xen/x86: Check notifier registration return value Date: Mon, 8 Nov 2021 11:11:17 +0100 Message-Id: <20211108101157.15189-3-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 Cc: xen-devel@lists.xenproject.org --- arch/x86/xen/enlighten.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index 95d970359e17..2264dd6e157f 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -354,7 +354,9 @@ static struct notifier_block xen_panic_block = { int xen_panic_handler_init(void) { - atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block); + if (atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block)) + pr_warn("Xen panic notifier already registered\n"); + return 0; } -- 2.29.2