Ktime Use Example "original"

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/interrupt.h>

static void Time_get (ktime_t *start);

static void Time_get (ktime_t *start)
{
*start = Ktime_get ();
}

static int time_print (const char *name, ktime_t starttime)
{
ktime_t Rettime;
S64 Usecs64;
int usecs;
unsigned long my_s, my_us;

Rettime = Ktime_get ();
Usecs64 = Ktime_to_us (Ktime_sub (Rettime, starttime));
Usecs = Usecs64;

my_s = usecs/usec_per_msec;
My_us = usecs% Usec_per_msec;

if (Usecs = = 0)
Usecs = 1;

PRINTK ("Time:%ld.%0 3LD \ r \ n ", my_s, My_us);

return 0;
}

static int hello_init (void)
{
ktime_t My_time;

PRINTK (Kern_alert "Hello, World ver=%s\n", "1.0");

Time_get (&my_time);
Time_print (NULL, my_time);

Mdelay (100);

Time_print (NULL, my_time);

return 0;
}

static void Hello_exit (void)
{
PRINTK (Kern_alert "Goodbye, cruel world\n");
}

Module_init (Hello_init);
Module_exit (Hello_exit);

Module_license ("Dual BSD/GPL");

[80492.470000] Hello, World ver=1.0
[80492.480000] time:0.000
[80492.580000] time:102.299

Ktime Use Example "original"