C programming: My code is not running correctly and I am sure what's wrong. Please help. I have provided a screenshot and everything below.

Assignment:

• Design a kernel module that creates a /proc file named /proc/jiffies that reports the current value of jiffies when the /proc/jiffies file is read, such as with the command

  cat /proc/jiffies Be sure to remove /proc/jiffies when the module is removed.

Source Code:

jiffies.c

#include

#include

#include

#include

#define PROC_NAME "jiffies"

/* File operation on proc */ static struct file_operations proc_ops = { .owner=THIS_MODULE, .read=proc_read, };

/* This function is called when the module is loaded. */

int proc_init(void)

{

/* creates the /proc/jiffies entry */

proc_create(PROC_NAME, 0666, NULL, &proc_ops);

return 0;

}

/* This function is called when the module is removed. */

void proc_exit(void)

{

/* removes the /proc/jiffies entry */

remove_proc_entry(PROC_NAME, NULL);

}

/* This function is called each time /proc/jiffies is read */

ssize_t proc_read(struct file *file, char __user *usr_buf, size_t count, loff_t *pos)

{

int rv = 0;

char buffer[BUFFER_SIZE];

static int completed = 0;

if (completed) {

completed = 0;

return 0;

}

completed = 1;

rv = sprintf(buffer, "%lu ", jiffies);

/* copies kernel space buffer to user space usr buf */

copy_to_user(usr_buf, buffer, rv);

return rv;

}

Makefile

obj-m += jiffies.o

all:

make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules

clean:

make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean