From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753545Ab3BCTRQ (ORCPT ); Sun, 3 Feb 2013 14:17:16 -0500 Received: from terminus.zytor.com ([198.137.202.10]:50706 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753417Ab3BCTRO (ORCPT ); Sun, 3 Feb 2013 14:17:14 -0500 Date: Sun, 3 Feb 2013 11:16:55 -0800 From: tip-bot for Steven Rostedt Message-ID: Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@kernel.org, mathieu.desnoyers@efficios.com, viro@ZenIV.linux.org.uk, rostedt@goodmis.org, srostedt@redhat.com, tglx@linutronix.de Reply-To: mingo@kernel.org, hpa@zytor.com, linux-kernel@vger.kernel.org, mathieu.desnoyers@efficios.com, rostedt@goodmis.org, viro@ZenIV.linux.org.uk, srostedt@redhat.com, tglx@linutronix.de In-Reply-To: <20130123225523.GY4939@ZenIV.linux.org.uk> References: <20130123225523.GY4939@ZenIV.linux.org.uk> To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/core] tracing: Remove tracepoint sample code Git-Commit-ID: d75f717e19fe595e7efbf67de195ada8d89dfbbe X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7 (terminus.zytor.com [127.0.0.1]); Sun, 03 Feb 2013 11:17:02 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: d75f717e19fe595e7efbf67de195ada8d89dfbbe Gitweb: http://git.kernel.org/tip/d75f717e19fe595e7efbf67de195ada8d89dfbbe Author: Steven Rostedt AuthorDate: Fri, 25 Jan 2013 09:46:36 -0500 Committer: Steven Rostedt CommitDate: Fri, 25 Jan 2013 11:22:11 -0500 tracing: Remove tracepoint sample code The tracepoint sample code was used to teach developers how to create their own tracepoints. But now the trace_events have been added as a higher level that is used directly by developers today. Only the trace_event code should use the tracepoint interface directly and no new tracepoints should be added. Besides, the example had a race condition with the use of the ->d_name.name dentry field, as pointed out by Al Viro. Best just to remove the code so it wont be used by other developers. Link: http://lkml.kernel.org/r/20130123225523.GY4939@ZenIV.linux.org.uk Cc: Al Viro Acked-by: Mathieu Desnoyers Signed-off-by: Steven Rostedt --- samples/Kconfig | 6 --- samples/Makefile | 2 +- samples/tracepoints/Makefile | 6 --- samples/tracepoints/tp-samples-trace.h | 11 ----- samples/tracepoints/tracepoint-probe-sample.c | 57 -------------------------- samples/tracepoints/tracepoint-probe-sample2.c | 44 -------------------- samples/tracepoints/tracepoint-sample.c | 57 -------------------------- 7 files changed, 1 insertion(+), 182 deletions(-) diff --git a/samples/Kconfig b/samples/Kconfig index 7b6792a..6181c2c 100644 --- a/samples/Kconfig +++ b/samples/Kconfig @@ -5,12 +5,6 @@ menuconfig SAMPLES if SAMPLES -config SAMPLE_TRACEPOINTS - tristate "Build tracepoints examples -- loadable modules only" - depends on TRACEPOINTS && m - help - This build tracepoints example modules. - config SAMPLE_TRACE_EVENTS tristate "Build trace_events examples -- loadable modules only" depends on EVENT_TRACING && m diff --git a/samples/Makefile b/samples/Makefile index 5ef08bb..1a60c62 100644 --- a/samples/Makefile +++ b/samples/Makefile @@ -1,4 +1,4 @@ # Makefile for Linux samples code -obj-$(CONFIG_SAMPLES) += kobject/ kprobes/ tracepoints/ trace_events/ \ +obj-$(CONFIG_SAMPLES) += kobject/ kprobes/ trace_events/ \ hw_breakpoint/ kfifo/ kdb/ hidraw/ rpmsg/ seccomp/ diff --git a/samples/tracepoints/Makefile b/samples/tracepoints/Makefile deleted file mode 100644 index 36479ad..0000000 --- a/samples/tracepoints/Makefile +++ /dev/null @@ -1,6 +0,0 @@ -# builds the tracepoint example kernel modules; -# then to use one (as root): insmod - -obj-$(CONFIG_SAMPLE_TRACEPOINTS) += tracepoint-sample.o -obj-$(CONFIG_SAMPLE_TRACEPOINTS) += tracepoint-probe-sample.o -obj-$(CONFIG_SAMPLE_TRACEPOINTS) += tracepoint-probe-sample2.o diff --git a/samples/tracepoints/tp-samples-trace.h b/samples/tracepoints/tp-samples-trace.h deleted file mode 100644 index 4d46be9..0000000 --- a/samples/tracepoints/tp-samples-trace.h +++ /dev/null @@ -1,11 +0,0 @@ -#ifndef _TP_SAMPLES_TRACE_H -#define _TP_SAMPLES_TRACE_H - -#include /* for struct inode and struct file */ -#include - -DECLARE_TRACE(subsys_event, - TP_PROTO(struct inode *inode, struct file *file), - TP_ARGS(inode, file)); -DECLARE_TRACE_NOARGS(subsys_eventb); -#endif diff --git a/samples/tracepoints/tracepoint-probe-sample.c b/samples/tracepoints/tracepoint-probe-sample.c deleted file mode 100644 index 744c0b9..0000000 --- a/samples/tracepoints/tracepoint-probe-sample.c +++ /dev/null @@ -1,57 +0,0 @@ -/* - * tracepoint-probe-sample.c - * - * sample tracepoint probes. - */ - -#include -#include -#include -#include "tp-samples-trace.h" - -/* - * Here the caller only guarantees locking for struct file and struct inode. - * Locking must therefore be done in the probe to use the dentry. - */ -static void probe_subsys_event(void *ignore, - struct inode *inode, struct file *file) -{ - path_get(&file->f_path); - dget(file->f_path.dentry); - printk(KERN_INFO "Event is encountered with filename %s\n", - file->f_path.dentry->d_name.name); - dput(file->f_path.dentry); - path_put(&file->f_path); -} - -static void probe_subsys_eventb(void *ignore) -{ - printk(KERN_INFO "Event B is encountered\n"); -} - -static int __init tp_sample_trace_init(void) -{ - int ret; - - ret = register_trace_subsys_event(probe_subsys_event, NULL); - WARN_ON(ret); - ret = register_trace_subsys_eventb(probe_subsys_eventb, NULL); - WARN_ON(ret); - - return 0; -} - -module_init(tp_sample_trace_init); - -static void __exit tp_sample_trace_exit(void) -{ - unregister_trace_subsys_eventb(probe_subsys_eventb, NULL); - unregister_trace_subsys_event(probe_subsys_event, NULL); - tracepoint_synchronize_unregister(); -} - -module_exit(tp_sample_trace_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Mathieu Desnoyers"); -MODULE_DESCRIPTION("Tracepoint Probes Samples"); diff --git a/samples/tracepoints/tracepoint-probe-sample2.c b/samples/tracepoints/tracepoint-probe-sample2.c deleted file mode 100644 index 9fcf990..0000000 --- a/samples/tracepoints/tracepoint-probe-sample2.c +++ /dev/null @@ -1,44 +0,0 @@ -/* - * tracepoint-probe-sample2.c - * - * 2nd sample tracepoint probes. - */ - -#include -#include -#include "tp-samples-trace.h" - -/* - * Here the caller only guarantees locking for struct file and struct inode. - * Locking must therefore be done in the probe to use the dentry. - */ -static void probe_subsys_event(void *ignore, - struct inode *inode, struct file *file) -{ - printk(KERN_INFO "Event is encountered with inode number %lu\n", - inode->i_ino); -} - -static int __init tp_sample_trace_init(void) -{ - int ret; - - ret = register_trace_subsys_event(probe_subsys_event, NULL); - WARN_ON(ret); - - return 0; -} - -module_init(tp_sample_trace_init); - -static void __exit tp_sample_trace_exit(void) -{ - unregister_trace_subsys_event(probe_subsys_event, NULL); - tracepoint_synchronize_unregister(); -} - -module_exit(tp_sample_trace_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Mathieu Desnoyers"); -MODULE_DESCRIPTION("Tracepoint Probes Samples"); diff --git a/samples/tracepoints/tracepoint-sample.c b/samples/tracepoints/tracepoint-sample.c deleted file mode 100644 index f4d89e0..0000000 --- a/samples/tracepoints/tracepoint-sample.c +++ /dev/null @@ -1,57 +0,0 @@ -/* tracepoint-sample.c - * - * Executes a tracepoint when /proc/tracepoint-sample is opened. - * - * (C) Copyright 2007 Mathieu Desnoyers - * - * This file is released under the GPLv2. - * See the file COPYING for more details. - */ - -#include -#include -#include -#include "tp-samples-trace.h" - -DEFINE_TRACE(subsys_event); -DEFINE_TRACE(subsys_eventb); - -struct proc_dir_entry *pentry_sample; - -static int my_open(struct inode *inode, struct file *file) -{ - int i; - - trace_subsys_event(inode, file); - for (i = 0; i < 10; i++) - trace_subsys_eventb(); - return -EPERM; -} - -static const struct file_operations mark_ops = { - .open = my_open, - .llseek = noop_llseek, -}; - -static int __init sample_init(void) -{ - printk(KERN_ALERT "sample init\n"); - pentry_sample = proc_create("tracepoint-sample", 0444, NULL, - &mark_ops); - if (!pentry_sample) - return -EPERM; - return 0; -} - -static void __exit sample_exit(void) -{ - printk(KERN_ALERT "sample exit\n"); - remove_proc_entry("tracepoint-sample", NULL); -} - -module_init(sample_init) -module_exit(sample_exit) - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Mathieu Desnoyers"); -MODULE_DESCRIPTION("Tracepoint sample");