From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 C0F54C31E51 for ; Sat, 15 Jun 2019 18:25:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9C3592184D for ; Sat, 15 Jun 2019 18:25:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560623151; bh=vWPYZBCODMGwcZhUIzS6KtTrRf0mJvEikwJL96bCByM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=BxQusaSr3n35Cj4djBRn5GCIbKwYlWYZqgtSjDNCV+xipb3Bib6Qm3yXMV/kfod3A Ck/CIi1FWkf2WU2tQIEKi0PZhWtcB6rYrkLfwRnSW4ECPxSjI3tR8Exq58M0PJ7fnW cZtMZ4xFuv4LhNrWgxL+uh9qrPpNq9IJAdn5ulBA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727103AbfFOSZQ (ORCPT ); Sat, 15 Jun 2019 14:25:16 -0400 Received: from mail-qt1-f195.google.com ([209.85.160.195]:43922 "EHLO mail-qt1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725270AbfFOSZK (ORCPT ); Sat, 15 Jun 2019 14:25:10 -0400 Received: by mail-qt1-f195.google.com with SMTP id z24so6310972qtj.10; Sat, 15 Jun 2019 11:25:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=gfbJRWowmbBmL/5PSSu1BU5VBQ2iIkWS/MK9bvMff9Y=; b=FAwf+6hjmWThr/Zo8e7ZPLeQ4Osz81kO6XOn01SydzL9G7yN45Gxq1gV1sDU8bZ8Ps FFMW53WswxVXCIz5ymPH+aojtStDVDFc9U4gzOUzoQm5z7aO4LdqWWx+0rGps4WFCt3i yAC+1YBfKSPmk/Rx0KOBAifiqYR+upzOWcfNjxSo/sUW9yTg5oQ89iEfb0VuH5V3kC5A 7dJCt5OfnPvSgkYgK2OHXh79Ftd14ZNMHmmmS1DEhRy6wdKaZepGZ6VA29ZMMDldvE2d 4TdTtSY/E3LUI5x/rycNBKJom4cvPWPtrOWTozTAnrOMUd8K9VmOU1ZlzofGVFmBbGp3 Wo5g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references; bh=gfbJRWowmbBmL/5PSSu1BU5VBQ2iIkWS/MK9bvMff9Y=; b=kbKfcA+g/1Ig8z7c9kvktKH8yMXbC8e3RyoT5JTYrOaGM8ERmuyQk9WNIW0BSEaHWT VyOCYYHCgA+iX4nKnaIbMaODdDLkX2EgS+uARsbEa53iaA9j67eu34rhgf46DS6V0mVg RTqfRY9NQgzAQ/8DSWbnDb6cDP8tNHPY6SJs2WG/ALm+HjEXQQWXsk3/gqXCetZEKL54 7WKfFEZ9AGH/Wnc8UR8PPZSqEnHMnRmwn0OL86V3DpYNvjsAxBQ3cUdPuD6HVVorT8Bm jwTeyIRCkI4+FxmYSBE5HVDD9lMncJ3MDDNYm3ku2oRLK8wZ06tDcmYfEQUIBarwnem7 GRRQ== X-Gm-Message-State: APjAAAXqv4fp3AqZ5UkiXJFRFWaeS/jlEhJRxAB8uhI5mrajLiouocoE HKZAKHV8ox9T4mxM66LsGZM= X-Google-Smtp-Source: APXvYqzAsjP5XFJMaZa4nNVaYMsFZyf6LFDCRQlhH8zipSL5vUkPHifbL2l8oi8JL4wyS9o7nD81zw== X-Received: by 2002:ac8:4705:: with SMTP id f5mr60570826qtp.99.1560623109356; Sat, 15 Jun 2019 11:25:09 -0700 (PDT) Received: from localhost ([2620:10d:c091:480::4883]) by smtp.gmail.com with ESMTPSA id y6sm3413435qki.67.2019.06.15.11.25.08 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 15 Jun 2019 11:25:08 -0700 (PDT) From: Tejun Heo To: dsterba@suse.com, clm@fb.com, josef@toxicpanda.com, axboe@kernel.dk, jack@suse.cz Cc: linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, kernel-team@fb.com, Tejun Heo Subject: [PATCH 3/9] blkcg, writeback: Implement wbc_blkcg_css() Date: Sat, 15 Jun 2019 11:24:47 -0700 Message-Id: <20190615182453.843275-4-tj@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190615182453.843275-1-tj@kernel.org> References: <20190615182453.843275-1-tj@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a helper to determine the target blkcg from wbc. Signed-off-by: Tejun Heo Reviewed-by: Josef Bacik --- include/linux/writeback.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/linux/writeback.h b/include/linux/writeback.h index b8f5f000cde4..800ee031e88a 100644 --- a/include/linux/writeback.h +++ b/include/linux/writeback.h @@ -11,6 +11,7 @@ #include #include #include +#include struct bio; @@ -93,6 +94,16 @@ static inline int wbc_to_write_flags(struct writeback_control *wbc) return 0; } +static inline struct cgroup_subsys_state * +wbc_blkcg_css(struct writeback_control *wbc) +{ +#ifdef CONFIG_CGROUP_WRITEBACK + if (wbc->wb) + return wbc->wb->blkcg_css; +#endif + return blkcg_root_css; +} + /* * A wb_domain represents a domain that wb's (bdi_writeback's) belong to * and are measured against each other in. There always is one global -- 2.17.1