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 F2037C7618B for ; Mon, 15 Jul 2019 05:11:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C6ACC214DA for ; Mon, 15 Jul 2019 05:11:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563167518; bh=pZzkhwcBJfs0QtEtXuJLrkB89zQzll96XuQ1G/Is+0g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=0oCPVyAaBYCIzHioSQQjsMcWjbLKxPn9tv5Cv37OHhntlLfVXw6AzqcZG3f1kXHKD FOXqsj9cdYYjOup4IMxdnfHLXfipUfFDjQsMf1XQF+YeInRoxOPeCEZrXfalrl4BOa IahgnYDCPCiuRX3N3iv3pUdslESdaJxdg9z7LmKc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729147AbfGOFL5 (ORCPT ); Mon, 15 Jul 2019 01:11:57 -0400 Received: from mail.kernel.org ([198.145.29.99]:46622 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725385AbfGOFL5 (ORCPT ); Mon, 15 Jul 2019 01:11:57 -0400 Received: from localhost.localdomain (NE2965lan1.rev.em-net.ne.jp [210.141.244.193]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 43C1620C01; Mon, 15 Jul 2019 05:11:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563167516; bh=pZzkhwcBJfs0QtEtXuJLrkB89zQzll96XuQ1G/Is+0g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LRORAcY2zcYru9gx0918/L0+zfne3wKzrg0secURUNbAWwyLoVwkGzDBejfmzkVdo hW8ggROrktIhJpAAMnOeDAuYKrsPjPv0p4hmCK0pLydlA3rNrL1mwTrfmqxp1OQTfF tskpuoySDawG/3Ze52x6UW0VGbN7QFxkfKoZwNQs= From: Masami Hiramatsu To: Steven Rostedt , Rob Herring , Frank Rowand , Tim Bird Cc: Ingo Molnar , Namhyung Kim , Jiri Olsa , Arnaldo Carvalho de Melo , Tom Zanussi , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [RFC PATCH v2 04/15] tracing: kprobes: Register to dynevent earlier stage Date: Mon, 15 Jul 2019 14:11:52 +0900 Message-Id: <156316751189.23477.5849503344032872544.stgit@devnote2> X-Mailer: git-send-email 2.20.1 In-Reply-To: <156316746861.23477.5815110570539190650.stgit@devnote2> References: <156316746861.23477.5815110570539190650.stgit@devnote2> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Register kprobe event to dynevent in subsys_initcall level. This will allow kernel to register new kprobe events in fs_initcall level via trace_run_command. Signed-off-by: Masami Hiramatsu --- kernel/trace/trace_kprobe.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index 6c5145525f90..5135c07b6557 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -1484,11 +1484,12 @@ static __init void setup_boot_kprobe_events(void) enable_boot_kprobe_events(); } -/* Make a tracefs interface for controlling probe points */ -static __init int init_kprobe_trace(void) +/* + * Register dynevent at subsys_initcall. This allows kernel to setup kprobe + * events in fs_initcall without tracefs. + */ +static __init int init_kprobe_trace_early(void) { - struct dentry *d_tracer; - struct dentry *entry; int ret; ret = dyn_event_register(&trace_kprobe_ops); @@ -1498,6 +1499,16 @@ static __init int init_kprobe_trace(void) if (register_module_notifier(&trace_kprobe_module_nb)) return -EINVAL; + return 0; +} +subsys_initcall(init_kprobe_trace_early); + +/* Make a tracefs interface for controlling probe points */ +static __init int init_kprobe_trace(void) +{ + struct dentry *d_tracer; + struct dentry *entry; + d_tracer = tracing_init_dentry(); if (IS_ERR(d_tracer)) return 0;