#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/proc_fs.h>
#include <linux/jiffies.h>
#include <linux/seq_file.h>

//extern uint64_t interrupt_time;

static struct proc_dir_entry *test_dir;

static int my_proc_show(struct seq_file *m, void *v)
{
seq_printf(m, "%lu\n", jiffies);
//seq_printf(m, "%lu", interrupt_time);
return 0;
}

static int my_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, my_proc_show, NULL);
}

static const struct file_operations tst_fops = {
.open = my_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};

static int __init test_init(void)
{
test_dir = proc_mkdir("myproc", NULL);

if (test_dir)
proc_create("jiffies", 0, test_dir, &tst_fops);

return 0;
}
static void __exit test_exit(void)
{
remove_proc_entry ("jiffies", test_dir);
proc_remove (test_dir);
}
module_init(test_init);
module_exit(test_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Test");


the above code is for procfs driver in which the above code contains the init function, exit function, file oepration function but how to create a seq_read() function from kernel to user. What is the api for that ?? could someone please help me in this ??

Go find an existing driver that implements a /proc entry and study it carefully. "Use the Source, Luke!"