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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS 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 E2F72C33C9E for ; Tue, 14 Jan 2020 21:04:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B32BF24658 for ; Tue, 14 Jan 2020 21:04:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729247AbgANVEY (ORCPT ); Tue, 14 Jan 2020 16:04:24 -0500 Received: from mail.kernel.org ([198.145.29.99]:50684 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728988AbgANVDj (ORCPT ); Tue, 14 Jan 2020 16:03:39 -0500 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 17E0224685; Tue, 14 Jan 2020 21:03:39 +0000 (UTC) Received: from rostedt by gandalf.local.home with local (Exim 4.93) (envelope-from ) id 1irTLe-000D6s-0n; Tue, 14 Jan 2020 16:03:38 -0500 Message-Id: <20200114210337.902305459@goodmis.org> User-Agent: quilt/0.65 Date: Tue, 14 Jan 2020 16:03:31 -0500 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Andrew Morton , Masami Hiramatsu Subject: [for-next][PATCH 15/26] tracing: kprobes: Register to dynevent earlier stage References: <20200114210316.450821675@goodmis.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Masami Hiramatsu 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. Link: http://lkml.kernel.org/r/157867234213.17873.18039000024374948737.stgit@devnote2 Signed-off-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware) --- 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 33a6a661904b..8113d6aa7bc5 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -1685,11 +1685,12 @@ 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); @@ -1699,6 +1700,16 @@ 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; -- 2.24.1