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=-10.1 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,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 19DC6C74A36 for ; Wed, 10 Jul 2019 20:51:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D8BCD208E4 for ; Wed, 10 Jul 2019 20:51:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1562791904; bh=NoUH40WWfl5RaPK0INqIORFyREDdEmRgnI5rAmNw7r4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=OST6pnc6WSMFTGJWanVxXTwp3xB7Vsm8fVB0i8QqSvZ7+4+0dvMcfpbZZw4YVcUyC 9AzNEeSSYhtcpYOUh8j7dT+Kd9zqx9PgSvfG+EMPoYrFRq88GGYu68oDTRQUTDT4so 4AWJoJRHy9agEV0hAIJzHAC3hHuZToomiZVRRHDM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727937AbfGJUvn (ORCPT ); Wed, 10 Jul 2019 16:51:43 -0400 Received: from mail-pl1-f194.google.com ([209.85.214.194]:37760 "EHLO mail-pl1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727896AbfGJUvj (ORCPT ); Wed, 10 Jul 2019 16:51:39 -0400 Received: by mail-pl1-f194.google.com with SMTP id b3so1809163plr.4; Wed, 10 Jul 2019 13:51:39 -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=XFh42r4xNNDnKj1zoXVhN66idRikWSnd44I9jtIogT8=; b=myn7c+wAv6aqdY+Lq3Y+dXFf6vNr1cjq2qmjuWFHefy8B5VaVPpKh1Zen3sG5yyIau S+fHXCHIHZK62ZZZQl4GKYZx3aqVkisP3cvekm3Q2t6MsiYuNCz6lFoZZVErcPhI5YZV snwp1Si+NXJ6E0KkySFS60F7xP2MZCSzvuNezrwuELLs11zfq6G+U57lKx0qEXGH6Qme qdfnP7ElPrZVbfMFcyH7L8UlwlmnfQtiId0n8Gqx/bAFzRnEaucNrTNvzxXthawnlvdj 8A7r/XaX0aXuYCbPy/wXIVRykURG6GzFcY3gU3eCkjiM7Ob/nxMrMiezEJGx/7EQkEsq ClHg== 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=XFh42r4xNNDnKj1zoXVhN66idRikWSnd44I9jtIogT8=; b=iDekIL77flmAUKZ7tzAk0mpdULFWI3E0f2pu0c4h8ySDVrECh+T4QK6ZeOy8hBRoOp zDj40tz8quFZr+xcEGEEkpP55+fbJLz1tap8FIrZdjdCoOjmg5tpXFsv5cgLfkrwnOBV lYfFAzU7d20XnZBJEhrlH572By59TIj975KgSn/y0+7dhlzhQKYhpRZ56lOpwZl3wjSx +34f00OjhIjUH/HBHzqZ+NbmBwGQynpHpMaJKwgIE5vzYpTcIewmrHOY5k8TlT6tFE8f R/+xZ08xq7IpkjlMxPUvkZRi1Ly4Ytsu5v6Pf6j44QljMPWL6qTmgj5g63C7k6WvxyNd c/Kg== X-Gm-Message-State: APjAAAXSjR9MIV7cmkdhHeG6sALIStLinMRKHIAmJ6evv8GFRFDs0jBg 6LKECwaCSd/cuNi0DG5iZEk= X-Google-Smtp-Source: APXvYqyMYaCesHjDSO3tjziUf1/tTJyoPpCfWQ3N184VItnK3jQutxIpIKeI/r2/yV4cIxE32ikmsg== X-Received: by 2002:a17:902:26c:: with SMTP id 99mr216067plc.215.1562791898990; Wed, 10 Jul 2019 13:51:38 -0700 (PDT) Received: from localhost ([2620:10d:c091:500::3:2bbe]) by smtp.gmail.com with ESMTPSA id q36sm2936037pgl.23.2019.07.10.13.51.38 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 10 Jul 2019 13:51:38 -0700 (PDT) From: Tejun Heo To: axboe@kernel.dk, newella@fb.com, clm@fb.com, josef@toxicpanda.com, dennisz@fb.com, lizefan@huawei.com, hannes@cmpxchg.org Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com, linux-block@vger.kernel.org, cgroups@vger.kernel.org, Tejun Heo Subject: [PATCH 02/10] blkcg: make ->cpd_init_fn() optional Date: Wed, 10 Jul 2019 13:51:20 -0700 Message-Id: <20190710205128.1316483-3-tj@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190710205128.1316483-1-tj@kernel.org> References: <20190710205128.1316483-1-tj@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org For policies which can do enough initialization from ->cpd_alloc_fn(), make ->cpd_init_fn() optional. Signed-off-by: Tejun Heo --- block/blk-cgroup.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 75f7f78b87b2..818e50b4cc7a 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -1478,7 +1478,8 @@ int blkcg_policy_register(struct blkcg_policy *pol) blkcg->cpd[pol->plid] = cpd; cpd->blkcg = blkcg; cpd->plid = pol->plid; - pol->cpd_init_fn(cpd); + if (pol->cpd_init_fn) + pol->cpd_init_fn(cpd); } } -- 2.17.1