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=ham 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 8A4BBC3A5A1 for ; Wed, 28 Aug 2019 22:06:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5CD9522CED for ; Wed, 28 Aug 2019 22:06:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1567029973; bh=bzCnLcG3oLQx9aEH2UOvGPbJ+fSM8FD+BUnvAwQshIo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=FxJO6pu6vEGA35EVrdvVGVKv00i0RMdrkucvcB74EwqD/f3KHy91r5/WSrDkOBZiG Jvtgbof6ViTtJEdeelevZ8MSisA32KHhoUjqsfljnwy/RXuLd77AtYFo+vZ/4PCW// AYhtAng0HsiIKhKZLWiE799X72i2Yyna48A9SgkY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727063AbfH1WGL (ORCPT ); Wed, 28 Aug 2019 18:06:11 -0400 Received: from mail-qk1-f195.google.com ([209.85.222.195]:40534 "EHLO mail-qk1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727022AbfH1WGL (ORCPT ); Wed, 28 Aug 2019 18:06:11 -0400 Received: by mail-qk1-f195.google.com with SMTP id f10so1195356qkg.7; Wed, 28 Aug 2019 15:06:11 -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=77lPCJVMbm2iaN6uswmaTozVPtpjzTspO9i1Ih4UGx0=; b=lkuKDlvcQJNAPDyWqh7z64PzAcgiPoVACIt2kCEHwITSzvm4646qx3UMoaXftENKBP qLyFOZlWg14FxVymoH+uPbQl5Gnj4yAngGhap+ZB4Fye+TKJ5t9O9oP3sOU0ECzPLIOu wxBCfu1/n/dbUAViCv+xm4hkJguZeixMibUkeKzeq++SwfncBv9StsMNCnbev2XjWe8s s+aivSvYkDNyXnvuS80dFmkhr36IlGtUhus4hZmcE4BNJGEROllypy8x7eOngTefjfPV NtY5z2iL8XeBKR+WnmNvi5CAGSiOehrdsB49BDNYDXU7nwVWydGk6Zc/AFGP+5IcHCPw q23A== 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=77lPCJVMbm2iaN6uswmaTozVPtpjzTspO9i1Ih4UGx0=; b=UiKcRkA1+LVWqJvMI2BV/f5g6HbKIirZTg3+JavqPgAivwbSjvkBNXOmt7FRn23gwz /TeCfJ5blSkl7iTTUAExclk/M2RWJ9NLlUV8kQB8Sy3NsrEf3vcMKSMjG77jtUBJr35Q QKhL8bHxmYjsKXXXhRect/n1zQvxnNKvZqjvD2jUHV5OWJK6qLVve9zVX08tM7FJchEa ecLxC54nyoLDk3uIHo70QWxabRPOw6tiXqLknbmKVeV+3w/P1mjiYipMTQZZfy6OaUko A00Y9RVjXlREovIvuIK6/Ou/s50Sah4PgB6Pc8fB895SNZ2Zi6nTFcyth5uwECnf2uQa vGjA== X-Gm-Message-State: APjAAAWOOaO+GhDFj28+fKYoZdSm2Wk7SHEL/pvLLpHI52u1u4NRe+ui Viug0aCrK+3HO4Up56XdglQ= X-Google-Smtp-Source: APXvYqybsop+rPif36RViqdPSukYZagr2iIr1DIQccne6MS6izAVmTZCxv4F+8qAhV4mOwjUkACQ2Q== X-Received: by 2002:a37:a090:: with SMTP id j138mr6458649qke.83.1567029970424; Wed, 28 Aug 2019 15:06:10 -0700 (PDT) Received: from localhost ([2620:10d:c091:500::1:c231]) by smtp.gmail.com with ESMTPSA id u16sm204671qkj.107.2019.08.28.15.06.09 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 28 Aug 2019 15:06:09 -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, linux-block@vger.kernel.org, kernel-team@fb.com, cgroups@vger.kernel.org, Tejun Heo Subject: [PATCH 02/10] blkcg: make ->cpd_init_fn() optional Date: Wed, 28 Aug 2019 15:05:52 -0700 Message-Id: <20190828220600.2527417-3-tj@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190828220600.2527417-1-tj@kernel.org> References: <20190828220600.2527417-1-tj@kernel.org> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@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 6a82ca3fb5cf..78ccbdcfe723 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -1475,7 +1475,8 @@ 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