From patchwork Mon May 9 23:32:12 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 12844209 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 2DB21C433EF for ; Mon, 9 May 2022 23:33:31 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.324876.547197 (Exim 4.92) (envelope-from ) id 1noCsU-0000GQ-5N; Mon, 09 May 2022 23:33:22 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 324876.547197; Mon, 09 May 2022 23:33:22 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1noCsU-0000GF-18; Mon, 09 May 2022 23:33:22 +0000 Received: by outflank-mailman (input) for mailman id 324876; Mon, 09 May 2022 23:33:20 +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 1noCsR-0007bw-Rq for xen-devel@lists.xenproject.org; Mon, 09 May 2022 23:33:19 +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 6841f3a4-cff0-11ec-a406-831a346695d4; Tue, 10 May 2022 01:33:19 +0200 (CEST) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: dmitry.osipenko) with ESMTPSA id 17BD61F41D8C 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: 6841f3a4-cff0-11ec-a406-831a346695d4 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1652139198; bh=95ioqXFiu/sMhB4rC2pN2mOqsgk/IiTVsJJFignNnOY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kd6IbYNbTMtYO8XHzDROg022CiuVMjD14vclGIX2y/UPqQJTY83k+AAQHlzWmnvvY DIbOq+AJ+ca0dm9KVPtIZY6LIwJR0dvHVODvj+gWmFv2rrA23tSPFfLb/Ld7WXpuF/ H2du8HyPkBmRsP8eQLukPdey+A1NM1blJJ0oKFmsjrsM19cx1w60DHdJiFj+BNJHgA CT2Gw205sJVKh3AqToaLUeLHth6M3pyFt+gPqA8mU19vHxX0uyWcQDKqZ8zNR9Nmqu cRtxZ2gdReA9506AcmJOJiJA6+rn1NttYLHyho2AlivK1XjmQN+dXmlaF9eF72LNY1 oD4iLEbpsl5mw== 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 04/27] kernel/reboot: Wrap legacy power-off callbacks into sys-off handlers Date: Tue, 10 May 2022 02:32:12 +0300 Message-Id: <20220509233235.995021-5-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 Wrap legacy power-off callbacks into sys-off handlers in order to support co-existence of both legacy and new callbacks while we're in process of upgrading legacy callbacks to the new API. Signed-off-by: Dmitry Osipenko --- kernel/reboot.c | 44 ++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 42 insertions(+), 2 deletions(-) diff --git a/kernel/reboot.c b/kernel/reboot.c index 672a658f21ee..2fb0357d9483 100644 --- a/kernel/reboot.c +++ b/kernel/reboot.c @@ -463,6 +463,47 @@ int devm_register_sys_off_handler(struct device *dev, } EXPORT_SYMBOL_GPL(devm_register_sys_off_handler); +static int legacy_pm_power_off_prepare(struct sys_off_data *data) +{ + if (pm_power_off_prepare) + pm_power_off_prepare(); + + return NOTIFY_DONE; +} + +static int legacy_pm_power_off(struct sys_off_data *data) +{ + if (pm_power_off) + pm_power_off(); + + return NOTIFY_DONE; +} + +/* + * Register sys-off handlers for legacy PM callbacks. This allows legacy + * PM callbacks co-exist with the new sys-off API. + * + * TODO: Remove legacy handlers once all legacy PM users will be switched + * to the sys-off based APIs. + */ +static int __init legacy_pm_init(void) +{ + register_sys_off_handler(SYS_OFF_MODE_POWER_OFF_PREPARE, + SYS_OFF_PRIO_DEFAULT, + legacy_pm_power_off_prepare, NULL); + + register_sys_off_handler(SYS_OFF_MODE_POWER_OFF, SYS_OFF_PRIO_DEFAULT, + legacy_pm_power_off, NULL); + + return 0; +} +core_initcall(legacy_pm_init); + +static void do_kernel_power_off_prepare(void) +{ + blocking_notifier_call_chain(&power_off_prep_handler_list, 0, NULL); +} + /** * kernel_power_off - power_off the system * @@ -471,8 +512,7 @@ EXPORT_SYMBOL_GPL(devm_register_sys_off_handler); void kernel_power_off(void) { kernel_shutdown_prepare(SYSTEM_POWER_OFF); - if (pm_power_off_prepare) - pm_power_off_prepare(); + do_kernel_power_off_prepare(); migrate_to_reboot_cpu(); syscore_shutdown(); pr_emerg("Power down\n");