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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8A1C7C433F5 for ; Fri, 14 Jan 2022 22:03:13 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 22BCE6B0081; Fri, 14 Jan 2022 17:03:13 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 18C956B0082; Fri, 14 Jan 2022 17:03:13 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 07AF76B0083; Fri, 14 Jan 2022 17:03:13 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0208.hostedemail.com [216.40.44.208]) by kanga.kvack.org (Postfix) with ESMTP id EA1786B0081 for ; Fri, 14 Jan 2022 17:03:12 -0500 (EST) Received: from smtpin17.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id AABFC998D3 for ; Fri, 14 Jan 2022 22:03:12 +0000 (UTC) X-FDA: 79030269024.17.5C6841D Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf01.hostedemail.com (Postfix) with ESMTP id 4A7C74000A for ; Fri, 14 Jan 2022 22:03:12 +0000 (UTC) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 9FB6C61FDD; Fri, 14 Jan 2022 22:03:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7B7A7C36AE9; Fri, 14 Jan 2022 22:03:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1642197791; bh=GAVMvjSqQb3qKYqLPSoXyCyjKQXix2PTQ97z3GBGXaY=; h=Date:From:To:Subject:In-Reply-To:From; b=O76iebov87USnie3YmN6n3CaBXftL772S9mKOI+eFfcHJoL+yZxeQ8/mYuZ8xzjn+ actYmcKn8P3TwxFj10Mry+jByftsqyr8Hv4L6GQ/aVvSATfuYg80e9sy/1NhVsue1J ABppWfrzOYtxin7oKi9Xso3UGOhrqGxCyOKvZsOM= Date: Fri, 14 Jan 2022 14:03:10 -0800 From: Andrew Morton To: akpm@linux-foundation.org, bmt@zurich.ibm.com, bristot@kernel.org, caihuoqing@baidu.com, dave@stgolabs.net, dledford@redhat.com, jgg@ziepe.ca, jiangshanlai@gmail.com, joel@joelfernandes.org, josh@joshtriplett.org, linux-mm@kvack.org, mathieu.desnoyers@efficios.com, mingo@redhat.com, mm-commits@vger.kernel.org, paulmck@kernel.org, rostedt@goodmis.org, torvalds@linux-foundation.org Subject: [patch 006/146] trace/hwlat: make use of the helper function kthread_run_on_cpu() Message-ID: <20220114220310.cKAJFgLZs%akpm@linux-foundation.org> In-Reply-To: <20220114140222.6b14f0061194d3200000c52d@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 4A7C74000A X-Stat-Signature: 4fzfccw36w618sqcopyw7je8wa9u5htx Authentication-Results: imf01.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=O76iebov; dmarc=none; spf=pass (imf01.hostedemail.com: domain of akpm@linux-foundation.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org X-HE-Tag: 1642197792-627860 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Cai Huoqing Subject: trace/hwlat: make use of the helper function kthread_run_on_cpu() Replace kthread_create_on_cpu/wake_up_process() with kthread_run_on_cpu() to simplify the code. Link: https://lkml.kernel.org/r/20211022025711.3673-7-caihuoqing@baidu.com Signed-off-by: Cai Huoqing Cc: Bernard Metzler Cc: Daniel Bristot de Oliveira Cc: Davidlohr Bueso Cc: Doug Ledford Cc: Ingo Molnar Cc: Jason Gunthorpe Cc: Joel Fernandes (Google) Cc: Josh Triplett Cc: Lai Jiangshan Cc: Mathieu Desnoyers Cc: "Paul E . McKenney" Cc: Steven Rostedt Signed-off-by: Andrew Morton --- kernel/trace/trace_hwlat.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) --- a/kernel/trace/trace_hwlat.c~trace-hwlat-make-use-of-the-helper-function-kthread_run_on_cpu +++ a/kernel/trace/trace_hwlat.c @@ -491,18 +491,14 @@ static void stop_per_cpu_kthreads(void) static int start_cpu_kthread(unsigned int cpu) { struct task_struct *kthread; - char comm[24]; - snprintf(comm, 24, "hwlatd/%d", cpu); - - kthread = kthread_create_on_cpu(kthread_fn, NULL, cpu, comm); + kthread = kthread_run_on_cpu(kthread_fn, NULL, cpu, "hwlatd/%u"); if (IS_ERR(kthread)) { pr_err(BANNER "could not start sampling thread\n"); return -ENOMEM; } per_cpu(hwlat_per_cpu_data, cpu).kthread = kthread; - wake_up_process(kthread); return 0; } _