From patchwork Wed Apr 27 22:49:08 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Guilherme G. Piccoli" X-Patchwork-Id: 568699 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EA499C433EF for ; Wed, 27 Apr 2022 22:55:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238804AbiD0W6Y (ORCPT ); Wed, 27 Apr 2022 18:58:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36570 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239159AbiD0W5t (ORCPT ); Wed, 27 Apr 2022 18:57:49 -0400 Received: from fanzine2.igalia.com (fanzine.igalia.com [178.60.130.6]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9B6558CCFB; Wed, 27 Apr 2022 15:53:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=mOzFWStqo1l1SFAwioSEW9cov+DtDc5WSMbZaYL5OFk=; b=jORyziNh7Mp7CJnb2ldBvIVUYT miqK/KwxTCDE0PrnGOVoO5V4xtjW+TEXZOKHxzyxZAzEuCslLE//gxMpeQbei+ydr8zg3pnWZUWxE L40pn68w+NUbAHLuqvLt2UI0hgcbpQZODu83KlzMI8qRKWoyX30oYob/b9pQLrf+6HFREi99ePbwb zW4TblodvYrIgJCYkkWUlwk3Cl/V3uSBOUWLD/GIZmkaB62kyu6wuslAaH0LxO2Qqyrw8rvwJQSXp vohmbyikfHUVSRBgOx4Bv9HUeJbAvmB/X4rw1kDURxjWp8eCgUztnLBZm1GN+7lilt+TPvGD7Gymp FQwd7uqA==; Received: from [179.113.53.197] (helo=localhost) by fanzine2.igalia.com with esmtpsa (Cipher TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim) id 1njqXD-0002EK-E5; Thu, 28 Apr 2022 00:53:24 +0200 From: "Guilherme G. Piccoli" To: akpm@linux-foundation.org, bhe@redhat.com, pmladek@suse.com, kexec@lists.infradead.org Cc: linux-kernel@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com, coresight@lists.linaro.org, linuxppc-dev@lists.ozlabs.org, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-edac@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-leds@vger.kernel.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linux-pm@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, linux-tegra@vger.kernel.org, linux-um@lists.infradead.org, linux-xtensa@linux-xtensa.org, netdev@vger.kernel.org, openipmi-developer@lists.sourceforge.net, rcu@vger.kernel.org, sparclinux@vger.kernel.org, xen-devel@lists.xenproject.org, x86@kernel.org, kernel-dev@igalia.com, gpiccoli@igalia.com, kernel@gpiccoli.net, halves@canonical.com, fabiomirmar@gmail.com, alejandro.j.jimenez@oracle.com, andriy.shevchenko@linux.intel.com, arnd@arndb.de, bp@alien8.de, corbet@lwn.net, d.hatayama@jp.fujitsu.com, dave.hansen@linux.intel.com, dyoung@redhat.com, feng.tang@intel.com, gregkh@linuxfoundation.org, mikelley@microsoft.com, hidehiro.kawai.ez@hitachi.com, jgross@suse.com, john.ogness@linutronix.de, keescook@chromium.org, luto@kernel.org, mhiramat@kernel.org, mingo@redhat.com, paulmck@kernel.org, peterz@infradead.org, rostedt@goodmis.org, senozhatsky@chromium.org, stern@rowland.harvard.edu, tglx@linutronix.de, vgoyal@redhat.com, vkuznets@redhat.com, will@kernel.org Subject: [PATCH 14/30] panic: Properly identify the panic event to the notifiers' callbacks Date: Wed, 27 Apr 2022 19:49:08 -0300 Message-Id: <20220427224924.592546-15-gpiccoli@igalia.com> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220427224924.592546-1-gpiccoli@igalia.com> References: <20220427224924.592546-1-gpiccoli@igalia.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The notifiers infrastructure provides a way to pass an "id" to the callbacks to determine what kind of event happened, i.e., what is the reason behind they getting called. The panic notifier currently pass 0, but this is soon to be used in a multi-targeted notifier, so let's pass a meaningful "id" over there. Signed-off-by: Guilherme G. Piccoli --- include/linux/panic_notifier.h | 5 +++++ kernel/panic.c | 2 +- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/include/linux/panic_notifier.h b/include/linux/panic_notifier.h index 41e32483d7a7..07dced83a783 100644 --- a/include/linux/panic_notifier.h +++ b/include/linux/panic_notifier.h @@ -9,4 +9,9 @@ extern struct atomic_notifier_head panic_notifier_list; extern bool crash_kexec_post_notifiers; +enum panic_notifier_val { + PANIC_UNUSED, + PANIC_NOTIFIER = 0xDEAD, +}; + #endif /* _LINUX_PANIC_NOTIFIERS_H */ diff --git a/kernel/panic.c b/kernel/panic.c index eb4dfb932c85..523bc9ccd0e9 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -287,7 +287,7 @@ void panic(const char *fmt, ...) * Run any panic handlers, including those that might need to * add information to the kmsg dump output. */ - atomic_notifier_call_chain(&panic_notifier_list, 0, buf); + atomic_notifier_call_chain(&panic_notifier_list, PANIC_NOTIFIER, buf); panic_print_sys_info(false);