From patchwork Mon May 9 23:32:13 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 12844210 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 lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8AE17C433EF for ; Mon, 9 May 2022 23:33:34 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.324881.547208 (Exim 4.92) (envelope-from ) id 1noCsX-0000dc-GP; Mon, 09 May 2022 23:33:25 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 324881.547208; Mon, 09 May 2022 23:33:25 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1noCsX-0000dK-Bd; Mon, 09 May 2022 23:33:25 +0000 Received: by outflank-mailman (input) for mailman id 324881; Mon, 09 May 2022 23:33:23 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1noCsV-0007bw-Sw for xen-devel@lists.xenproject.org; Mon, 09 May 2022 23:33:23 +0000 Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [46.235.227.227]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id 6a98b542-cff0-11ec-a406-831a346695d4; Tue, 10 May 2022 01:33:23 +0200 (CEST) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: dmitry.osipenko) with ESMTPSA id 0842C1F41E8A X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 6a98b542-cff0-11ec-a406-831a346695d4 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1652139202; bh=8Fx2NXCMOUBUfmtFhnG6e+1bhUvia7Lkro+EJHtjozI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RryRpTBWSvFrqD7A7EctZOMN6tE1a1/5heQcWEPcVbcoeASmRzyrn+watrDphnz1q gr0qo93ZE/53tbomd6WV1UoDxm182gd/Hwbei2xLmUuosOcOg00u121ZZYdCv5U0Ec ADOyWCsjg1iIXn/9D6iPK+ueBrwxIG/eVse+9TJHcuDRFcjJUAqLMIwnYbPaNy2viZ LcZ/hWkRfc3wjZpKDS3wxSoVKAByM9jcjXSEITcDoaj2VrvHgo3EaXqnrqMzZkrxws AbnZOxmEdJ1KPvFAifSKgdx2cTW2g9ZZvBuT5AlXPNuvg1BMexEMF47dJ+tuFKEEYa aihfJhaIo/8qw== From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Russell King , Catalin Marinas , Will Deacon , Guo Ren , Geert Uytterhoeven , Greg Ungerer , Joshua Thompson , Thomas Bogendoerfer , Sebastian Reichel , Linus Walleij , Philipp Zabel , Greentime Hu , Vincent Chen , "James E.J. Bottomley" , Helge Deller , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Paul Walmsley , Palmer Dabbelt , Albert Ou , Yoshinori Sato , Rich Felker , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Boris Ostrovsky , Juergen Gross , Stefano Stabellini , "Rafael J. Wysocki" , Len Brown , Santosh Shilimkar , Krzysztof Kozlowski , Liam Girdwood , Mark Brown , Pavel Machek , Lee Jones , Andrew Morton , Guenter Roeck , Daniel Lezcano , Andy Shevchenko , Ulf Hansson , =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= Cc: linux-kernel@vger.kernel.org, linux-csky@vger.kernel.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-sh@vger.kernel.org, xen-devel@lists.xenproject.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-tegra@vger.kernel.org Subject: [PATCH v8 05/27] kernel/reboot: Add do_kernel_power_off() Date: Tue, 10 May 2022 02:32:13 +0300 Message-Id: <20220509233235.995021-6-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220509233235.995021-1-dmitry.osipenko@collabora.com> References: <20220509233235.995021-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Add do_kernel_power_off() helper that will remove open-coded pm_power_off invocations from the architecture code. This is the first step on the way to remove the global pm_power_off variable, which will allow us to implement consistent power-off chaining support. Signed-off-by: Dmitry Osipenko --- include/linux/reboot.h | 2 ++ kernel/reboot.c | 13 +++++++++++++ 2 files changed, 15 insertions(+) diff --git a/include/linux/reboot.h b/include/linux/reboot.h index 05981ef079d8..6b951d68c0c7 100644 --- a/include/linux/reboot.h +++ b/include/linux/reboot.h @@ -63,6 +63,8 @@ extern void machine_shutdown(void); struct pt_regs; extern void machine_crash_shutdown(struct pt_regs *); +void do_kernel_power_off(void); + /* * sys-off handler API. */ diff --git a/kernel/reboot.c b/kernel/reboot.c index 2fb0357d9483..9afa99a32d62 100644 --- a/kernel/reboot.c +++ b/kernel/reboot.c @@ -504,6 +504,19 @@ static void do_kernel_power_off_prepare(void) blocking_notifier_call_chain(&power_off_prep_handler_list, 0, NULL); } +/** + * do_kernel_power_off - Execute kernel power-off handler call chain + * + * Expected to be called as last step of the power-off sequence. + * + * Powers off the system immediately if a power-off handler function has + * been registered. Otherwise does nothing. + */ +void do_kernel_power_off(void) +{ + atomic_notifier_call_chain(&power_off_handler_list, 0, NULL); +} + /** * kernel_power_off - power_off the system *