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,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 82411C31E45 for ; Fri, 14 Jun 2019 01:56:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 497E321537 for ; Fri, 14 Jun 2019 01:56:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560477403; bh=uXS9nVCh+lIgKg10NVIcbbZH7lqGzgybAVnKmYwB844=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ZfUCuKaZEp+DJyWJcIP1B7EdKd9UVaCZSicAKou8uESX+FBwdDEsEaxLul0y+jbeQ /gAa3l8sPEZEOFerktnzI2RM/7F0FWMrAqOIVFhThnbGh5FUwVWlQZCW77jEhwfz1O j7UunxDTelpRY822wvrY5vtKrGU/1XexGEic2hqc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726873AbfFNB4j (ORCPT ); Thu, 13 Jun 2019 21:56:39 -0400 Received: from mail-pg1-f193.google.com ([209.85.215.193]:32880 "EHLO mail-pg1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726083AbfFNB4i (ORCPT ); Thu, 13 Jun 2019 21:56:38 -0400 Received: by mail-pg1-f193.google.com with SMTP id k187so586927pga.0; Thu, 13 Jun 2019 18:56:37 -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=75WxO2o1ANUQ23e7/l2/5rNs/NOLt4FGGwCAxlIKBW0=; b=qx1z00X5ideAjYd6TZno/ffdD3lXZInAFbMTneAqyt87oXP1watdYXmJaxvV7i70+G QpegO3wNlUlp8uYvqU7gCtA0MMQ+50hw60oZ2oxmw9x2Jy4gnpJIQzra6tLSMwfBxixg oxoSLws8KwRRq3WsL51VV1fof5qGlk1TNyAVDX20xydqNskOTyUeGxnQn5kpTy3OzlgA sG0iO7FqjL8JbO7fRzeM30Ap62l7DtUtqZawypoCeMS4jDMsqiDV4AdS+fukMbglBWcy R7RseVVwtMQ3x41JRBOLGi1B+ojxYMpL3G6psCVFbFKe4UPn0loETZobi3dZKh3TanSo Ty/w== 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=75WxO2o1ANUQ23e7/l2/5rNs/NOLt4FGGwCAxlIKBW0=; b=DhkHoJhAhMYOI5lhkT54dYzYAjFTctWd1611tYIl5s+vUeLFecQEJCTtFOVo0+BrBe UKK9pyxHNkJ/aUodlJgsi2eefPL4cV1qi7e5Ncn/ERmpjZnNGs8z619wzHhKh+yA41PD eAEXj4Kh39GRcVfr83SbAroVz73cnrNiNzzfXmOI/UTtopIg4JLI127npdlj1nSy2WsT ldJ7dueMH/IYUoHJkWsEnBIkZHVl64DK1k1GCTQ4cC8/J4kr13sYBy8GzjhWkEw0JR4Z K5K3fiNTrBgip/kPXe2D3X8avZ1AtwM9HUvoxhUJWmuKjCxOAnllf30KaDLHso+K4hYY HVXQ== X-Gm-Message-State: APjAAAUEmOLO2kP3DPrWDSNYdT7e1hNJeD61xRdFhfMYFINst1/neMjb qoG+jGlU30nguaXmY5jRXyU= X-Google-Smtp-Source: APXvYqzfHreRH8W3dhKxFdTroyccvUGMNr4JzJpAQoB6vQcwIfC9El/LMMPaw3HLqY9Qgk8R6ftpbw== X-Received: by 2002:a63:ee12:: with SMTP id e18mr34123441pgi.412.1560477397146; Thu, 13 Jun 2019 18:56:37 -0700 (PDT) Received: from localhost ([2620:10d:c091:500::2:9d14]) by smtp.gmail.com with ESMTPSA id z11sm1029370pjn.2.2019.06.13.18.56.36 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 13 Jun 2019 18:56:36 -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, ast@kernel.org, daniel@iogearbox.net, kafai@fb.com, songliubraving@fb.com, yhs@fb.com, bpf@vger.kernel.org, Tejun Heo Subject: [PATCH 02/10] blkcg: make ->cpd_init_fn() optional Date: Thu, 13 Jun 2019 18:56:12 -0700 Message-Id: <20190614015620.1587672-3-tj@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190614015620.1587672-1-tj@kernel.org> References: <20190614015620.1587672-1-tj@kernel.org> Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@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 30d3a0fbccac..60ad9b96e6eb 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -1534,7 +1534,8 @@ 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