From patchwork Sun Dec 20 03:45:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiaoming Ni X-Patchwork-Id: 346310 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 526DBC4361B for ; Sun, 20 Dec 2020 03:45:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 127B823A9D for ; Sun, 20 Dec 2020 03:45:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727002AbgLTDp4 (ORCPT ); Sat, 19 Dec 2020 22:45:56 -0500 Received: from szxga05-in.huawei.com ([45.249.212.191]:10053 "EHLO szxga05-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726912AbgLTDp4 (ORCPT ); Sat, 19 Dec 2020 22:45:56 -0500 Received: from DGGEMS407-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4Cz7ks2xkczM6xs; Sun, 20 Dec 2020 11:44:21 +0800 (CST) Received: from use12-sp2.huawei.com (10.67.189.174) by DGGEMS407-HUB.china.huawei.com (10.3.19.207) with Microsoft SMTP Server id 14.3.498.0; Sun, 20 Dec 2020 11:45:07 +0800 From: Xiaoming Ni To: , , , , , , , , CC: , Subject: [PATCH v2 0/4] panic: Add new API in_panic_state() Date: Sun, 20 Dec 2020 11:45:01 +0800 Message-ID: <20201220034505.113118-1-nixiaoming@huawei.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 X-Originating-IP: [10.67.189.174] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org For some features (such as hang_task, ledtrig-activity, ledtrig-heartbeat) different processing logics need to be performed based on whether the current system is in panic state: 1: Register hook for panic_notifier_list. 2. Assign a value to the global variable in the hook function. 3. Determine whether the system is in panic state based on the global variable and perform different processing. Duplicate code snippets exist, and the timing judgment is relatively lag. Therefore, consider extracting the new API: bool in_panic_state(void). ---------------- v2: Rename api to in_panic_state as recommended by Pavel Machek, Tetsuo Handa, Randy Dunlap. v1: https://lore.kernel.org/lkml/20201218114406.61906-1-nixiaoming@huawei.com/ API name: is_being_panic ---------------- Xiaoming Ni (4): panic: Add new API in_panic_state() hung_task: Replace "did_panic" with in_panic_state() leds:trigger:ledtrig-activity Replace "panic_detected" with in_panic_state() leds:trigger:ledtrig-heartbeat: Replace "panic_heartbeats" with in_panic_state() drivers/leds/trigger/ledtrig-activity.c | 19 +------------------ drivers/leds/trigger/ledtrig-heartbeat.c | 19 +------------------ include/linux/kernel.h | 1 + kernel/hung_task.c | 17 +---------------- kernel/panic.c | 6 ++++++ 5 files changed, 10 insertions(+), 52 deletions(-)