//-------------------------------------------------------------------
//	jiffies.c
//
//	This module creates a pseudo-file (named '/proc/jiffies') in
//	order to give users a way to obtain the current value of the 
//	kernel's 'jiffies' global variable.  That variable is set to
//	zero during system startup, and thereafter is incremented by
//	the Interrupt Service Routine for the system timer, which is
//	programmed on x86 systems to generate periodic interrupts at 
//	the rate of 1000-per-second (Linux kernels prior to 2.6 used
//	the slower rate of 100-per-second).     
//
//	NOTE: Developed and tested with Linux kernel version 2.6.10.
//
//	programmer: ALLAN CRUSE
//	written on: 27 JAN 2005
//-------------------------------------------------------------------

#include <linux/module.h>	// for init_module() 
#include <linux/proc_fs.h>	// for create_proc_info_entry() 

static char modname[] = "jiffies";

static int my_get_info( char *buf, char **start, off_t off, int count )
{
	int	len;

	len = 0;
	len += sprintf( buf+len, " jiffies = %lu ", jiffies );
	len += sprintf( buf+len, "\n" );

	return	len;
}


int init_module( void )
{
	printk( "<1>\nInstalling \'%s\' module\n", modname );
	create_proc_info_entry( modname, 0, NULL, my_get_info );
	return	0;  //SUCCESS
}


void cleanup_module( void )
{
	remove_proc_entry( modname, NULL );
	printk( "<1>Removing \'%s\' module\n", modname );
}

MODULE_LICENSE("GPL");