From patchwork Fri Oct 22 02:57:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Cai,Huoqing" X-Patchwork-Id: 12576957 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 37240C4167D for ; Fri, 22 Oct 2021 02:59:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 237A661425 for ; Fri, 22 Oct 2021 02:59:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232681AbhJVDBe (ORCPT ); Thu, 21 Oct 2021 23:01:34 -0400 Received: from mx22.baidu.com ([220.181.50.185]:50614 "EHLO baidu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S232660AbhJVDBc (ORCPT ); Thu, 21 Oct 2021 23:01:32 -0400 Received: from BC-Mail-Ex07.internal.baidu.com (unknown [172.31.51.47]) by Forcepoint Email with ESMTPS id 9CE801ACFEDD149798ED; Fri, 22 Oct 2021 10:59:14 +0800 (CST) Received: from BJHW-MAIL-EX27.internal.baidu.com (10.127.64.42) by BC-Mail-EX07.internal.baidu.com (172.31.51.47) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2242.12; Fri, 22 Oct 2021 10:59:14 +0800 Received: from LAPTOP-UKSR4ENP.internal.baidu.com (172.31.63.8) by BJHW-MAIL-EX27.internal.baidu.com (10.127.64.42) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14; Fri, 22 Oct 2021 10:59:13 +0800 From: Cai Huoqing To: CC: Cai Huoqing , Bernard Metzler , Doug Ledford , Jason Gunthorpe , "Davidlohr Bueso" , "Paul E. McKenney" , "Josh Triplett" , Mathieu Desnoyers , Lai Jiangshan , Joel Fernandes , Ingo Molnar , Daniel Bristot de Oliveira , , , Subject: [PATCH v3 3/6] ring-buffer: Make use of the helper function kthread_run_on_cpu() Date: Fri, 22 Oct 2021 10:57:06 +0800 Message-ID: <20211022025711.3673-4-caihuoqing@baidu.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211022025711.3673-1-caihuoqing@baidu.com> References: <20211022025711.3673-1-caihuoqing@baidu.com> MIME-Version: 1.0 X-Originating-IP: [172.31.63.8] X-ClientProxiedBy: BC-Mail-Ex28.internal.baidu.com (172.31.51.22) To BJHW-MAIL-EX27.internal.baidu.com (10.127.64.42) Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org Replace kthread_create/kthread_bind/wake_up_process() with kthread_run_on_cpu() to simplify the code. Signed-off-by: Cai Huoqing --- kernel/trace/ring_buffer.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index c5a3fbf19617..afb306e21e5b 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -5898,16 +5898,13 @@ static __init int test_ringbuffer(void) rb_data[cpu].buffer = buffer; rb_data[cpu].cpu = cpu; rb_data[cpu].cnt = cpu; - rb_threads[cpu] = kthread_create(rb_test, &rb_data[cpu], - "rbtester/%d", cpu); + rb_threads[cpu] = kthread_run_on_cpu(rb_test, &rb_data[cpu], + cpu, "rbtester/%u"); if (WARN_ON(IS_ERR(rb_threads[cpu]))) { pr_cont("FAILED\n"); ret = PTR_ERR(rb_threads[cpu]); goto out_free; } - - kthread_bind(rb_threads[cpu], cpu); - wake_up_process(rb_threads[cpu]); } /* Now create the rb hammer! */