mirror of
https://github.com/torvalds/linux.git
synced 2024-12-27 13:22:23 +00:00
0a5d649018
Fix the tracepoint documentation to refer to "tracepoint-sample" instead of "tracepoint-example" to match what actually exists; fix the directory, and clarify how to compile. Change every instance of "example" in the sample tracepoint code to "sample" for consistency. Signed-off-by: Jody McIntyre <scjody@sun.com> Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: torvalds@linux-foundation.org LKML-Reference: <20090324200027.GH8294@clouds> Signed-off-by: Ingo Molnar <mingo@elte.hu>
57 lines
1.2 KiB
C
57 lines
1.2 KiB
C
/* tracepoint-sample.c
|
|
*
|
|
* Executes a tracepoint when /proc/tracepoint-sample is opened.
|
|
*
|
|
* (C) Copyright 2007 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
|
|
*
|
|
* This file is released under the GPLv2.
|
|
* See the file COPYING for more details.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/proc_fs.h>
|
|
#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 struct file_operations mark_ops = {
|
|
.open = my_open,
|
|
};
|
|
|
|
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");
|