31155bc03e
Module example showing how to use the Linux Kernel Markers. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
/* marker-example.c
|
|
*
|
|
* Executes a marker when /proc/marker-example 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/marker.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/proc_fs.h>
|
|
|
|
struct proc_dir_entry *pentry_example;
|
|
|
|
static int my_open(struct inode *inode, struct file *file)
|
|
{
|
|
int i;
|
|
|
|
trace_mark(subsystem_event, "%d %s", 123, "example string");
|
|
for (i = 0; i < 10; i++)
|
|
trace_mark(subsystem_eventb, MARK_NOARGS);
|
|
return -EPERM;
|
|
}
|
|
|
|
static struct file_operations mark_ops = {
|
|
.open = my_open,
|
|
};
|
|
|
|
static int example_init(void)
|
|
{
|
|
printk(KERN_ALERT "example init\n");
|
|
pentry_example = create_proc_entry("marker-example", 0444, NULL);
|
|
if (pentry_example)
|
|
pentry_example->proc_fops = &mark_ops;
|
|
else
|
|
return -EPERM;
|
|
return 0;
|
|
}
|
|
|
|
static void example_exit(void)
|
|
{
|
|
printk(KERN_ALERT "example exit\n");
|
|
remove_proc_entry("marker-example", NULL);
|
|
}
|
|
|
|
module_init(example_init)
|
|
module_exit(example_exit)
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Mathieu Desnoyers");
|
|
MODULE_DESCRIPTION("Marker example");
|