From patchwork Mon Nov 28 09:10:13 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ricardo Ribalda X-Patchwork-Id: 13057170 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 alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (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 880B6C433FE for ; Mon, 28 Nov 2022 09:12:01 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 059C6168E; Mon, 28 Nov 2022 10:11:09 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 059C6168E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1669626719; bh=4IJsRzjRUBmI8ELm76XeH219TKYxoCY1FpvtAWp9NN8=; h=From:Date:Subject:References:In-Reply-To:To:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=bdvtz2xRvPoHs0x4ddV6zOrrWTkBUqUHAxFrAjtJQZJzWzYq2LbMIjvMEUjGSwXK0 2cI5N19mYGkOBUgnkRry+NqPxpLAazPiy50zv8IAOuSlKOFhfGP1+p5O22pa6u2XyO eh3KrmSuole6REySQRx5No9bkE0LI/NBqsK+pM6k= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 9E4B3F8028B; Mon, 28 Nov 2022 10:10:49 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id D2826F800B6; Mon, 28 Nov 2022 10:10:45 +0100 (CET) Received: from mail-ej1-x633.google.com (mail-ej1-x633.google.com [IPv6:2a00:1450:4864:20::633]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 790CDF8016E for ; Mon, 28 Nov 2022 10:10:38 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 790CDF8016E Authentication-Results: alsa1.perex.cz; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="Y7Z/PxFa" Received: by mail-ej1-x633.google.com with SMTP id ud5so24125361ejc.4 for ; Mon, 28 Nov 2022 01:10:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=0C3tubLwb2GLSH1X3VvRqQXs2H60xiiDuvmjMSeKtSo=; b=Y7Z/PxFaD/VnaXhXyOGe1ep7kAm/dknEPXug0yeRdRkaUlQkVv9MCvcaYEiJvLRkry lrCXQY1WoeLSJF2Z7gMjS6IbqVD1pg69EtBDV99XqW42zef9KsDOYIqKUd+OeVB9qiVy +H1ykGL80zvjtHMdSMcV9/mXB6AqG1c8naFrQ= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=0C3tubLwb2GLSH1X3VvRqQXs2H60xiiDuvmjMSeKtSo=; b=p0lKdjilc4uonif++8eTb78KsT/d/tt3XnuX2L0m95PZgFofmUcI2N2O+A0wc5GF03 cTvjFUibMFjUHWvqbnxIWiFDJ0pueZEba8P/nIIRAXymfe2w24z9rb74OImTfI++mXWb M9jh4+lZzQ6Lfp/6OwSMs5xmWn9j75rH6AmwotVVJTe5FSBOksXbc4i5TGaHbiU2gfyA Vfm68OU/m9XGcYIgLtNIVxCn6UAE/NbB3siuKwdKUmE9TZb92WihUYolhpKiYcziVSOX y8UzmLElxls1pnPRw/54ItmYF9A7NtVg+GxCv+opYiKrwIzOMezKGHBH7TPJtHpQBmub 9m2Q== X-Gm-Message-State: ANoB5pmbq4xvUkdCzIPmstoAd4MfZbctCn4raQ1o7RQAVSkgMm9eJYdy dnVqRNPTgJ8z1vW5NpOGB4J4qQ== X-Google-Smtp-Source: AA0mqf568e9xybgGK/wRSf+mQyS6fCinnYqI4Pilk6TRGk3gvya6YcaAW/Z72IJuzNUxNiJTm7kIqw== X-Received: by 2002:a17:906:f189:b0:7ae:3fa3:d7c6 with SMTP id gs9-20020a170906f18900b007ae3fa3d7c6mr40230014ejb.494.1669626637275; Mon, 28 Nov 2022 01:10:37 -0800 (PST) Received: from alco.roam.corp.google.com (80.71.134.83.ipv4.parknet.dk. [80.71.134.83]) by smtp.gmail.com with ESMTPSA id p35-20020a056402502300b00463b9d47e1fsm4932346eda.71.2022.11.28.01.10.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Nov 2022 01:10:36 -0800 (PST) From: Ricardo Ribalda Date: Mon, 28 Nov 2022 10:10:13 +0100 Subject: [PATCH v3 1/2] freezer: Add processes_frozen() MIME-Version: 1.0 Message-Id: <20221127-snd-freeze-v3-1-a2eda731ca14@chromium.org> References: <20221127-snd-freeze-v3-0-a2eda731ca14@chromium.org> In-Reply-To: <20221127-snd-freeze-v3-0-a2eda731ca14@chromium.org> To: Takashi Iwai , Len Brown , Pierre-Louis Bossart , Kai Vehmanen , Ranjani Sridharan , Mark Brown , Jaroslav Kysela , Pavel Machek , "Rafael J. Wysocki" X-Mailer: b4 0.11.0-dev-696ae X-Developer-Signature: v=1; a=openpgp-sha256; l=1657; i=ribalda@chromium.org; h=from:subject:message-id; bh=4IJsRzjRUBmI8ELm76XeH219TKYxoCY1FpvtAWp9NN8=; b=owEBbQKS/ZANAwAKAdE30T7POsSIAcsmYgBjhHsGpUmHDy4LbKwnpR9Rk9CtwMEd0pQpdx1IE0fb 6zgFBL2JAjMEAAEKAB0WIQREDzjr+/4oCDLSsx7RN9E+zzrEiAUCY4R7BgAKCRDRN9E+zzrEiO42EA CHpbt3xEX9Nc3qtOSj8Ch4ZuO/hdfkPBhyD4C5+ZvwkIovXOt2hSP+891sKUfkvG7jPbx1tB/SgbSI 6sdu+55LjjUnH2dANbcNuS79O2FpFCYNPpE7Ay2qDBZZuDb+WP27IOBVfrv7L8+ACy2tqqjELzCwnT Q/cZViMSJcGnr5llb+IkzVUz3GVqKc3UKyglcwyP+e+McJFKPsxcUUXhniivY1uTPl4I/maBS/zhbq JqBbCuNwXr6Ef3ySgmBCEYGWwuNhbray7QfkYId1aJJa/JnGQ9jQyMM8cdB23ByMOtwVXsBCFUxTUa pV2JI//mgbwcjyFitY+33Alk8p+CsZw5/sWyW7TXQTH6t0nZyRLCz3zBvQPAi2HaL1w2E+++dpVUNz a86ZD49Njb4GiF19mePCzi3LfsNW07Bz/82Y8NAvyip9oOn4tHhyg2og9wav1n+LzgJj9Fem71kBlz 75EWG3p/2TiX1aZEaHPCDEX6489tafeRTG1taPq/CgRlcPPxrOfQiOu60xgrq5jDxY7kknT/c0sR22 bZgxjhGx1MwW6PyoDItmvdmEbbPpFnuWZm1THQuvBTpjP+8H6RUt8LvdpbByM41YDFFj/J0qmtyzGX eqihKxGfFODDE3f1r8ri8YaQZECqCn/S4KZvPmGqw+WYi2FVvZ9JYmvN0cPQ== X-Developer-Key: i=ribalda@chromium.org; a=openpgp; fpr=9EC3BB66E2FC129A6F90B39556A0D81F9F782DA9 Cc: "Joel Fernandes \(Google\)" , alsa-devel@alsa-project.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Ricardo Ribalda X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" Add a way to let the drivers know if the processes are frozen. This is needed by drivers that are waiting for processes to end on their shutdown path. Signed-off-by: Ricardo Ribalda --- include/linux/freezer.h | 2 ++ kernel/freezer.c | 11 +++++++++++ 2 files changed, 13 insertions(+) diff --git a/include/linux/freezer.h b/include/linux/freezer.h index b303472255be..ca861ace0689 100644 --- a/include/linux/freezer.h +++ b/include/linux/freezer.h @@ -47,6 +47,7 @@ extern int freeze_processes(void); extern int freeze_kernel_threads(void); extern void thaw_processes(void); extern void thaw_kernel_threads(void); +bool processes_frozen(void); static inline bool try_to_freeze(void) { @@ -80,6 +81,7 @@ static inline int freeze_processes(void) { return -ENOSYS; } static inline int freeze_kernel_threads(void) { return -ENOSYS; } static inline void thaw_processes(void) {} static inline void thaw_kernel_threads(void) {} +static inline bool processes_frozen(void) { return false; } static inline bool try_to_freeze(void) { return false; } diff --git a/kernel/freezer.c b/kernel/freezer.c index 4fad0e6fca64..08828c4e12fd 100644 --- a/kernel/freezer.c +++ b/kernel/freezer.c @@ -233,3 +233,14 @@ bool set_freezable(void) return try_to_freeze(); } EXPORT_SYMBOL(set_freezable); + +/** + * processes_frozen - Check if the processes are frozen + * + * Let drivers know if they shall wait for processes. + */ +bool processes_frozen(void) +{ + return pm_freezing; +} +EXPORT_SYMBOL(processes_frozen);