Device driver query

[linux lover <linux_lover2004@xxxxxxxxx>]

 i know how to write a character device driver but the same will not work for
simple file why? that mean if i create a file /root/myfile and want to write
and read to it periodically from a kernel module it is not working cause i am doing

.....fragment of my code.........
static struct file_operations myfile_file_operations = {
    open:       myfile_open,
    release:    myfile_release,
    read:       myfile_read,
    write:      myfile_write,
};

int init_module(void)
{

    printk("Loading myfile Module\n");

 ent = filp_open("/root/myfile", O_RDWR,S_IRUSR | S_IWUSR);
  if ( ent == NULL)
                      printk(KERN_DEBUG, "Error opening file...\n");
    return 0;
}

void cleanup_module(void)
{
    printk("Unloading myfile Module\n");

    filp_close(ent,NULL);
}

int myfile_open(struct inode *inodep, struct file *filp)
{
    printk("Opening a file....\n");
    MOD_INC_USE_COUNT;

    return 0;
}

int myfile_release(struct inode *inodep, struct file *filp)
{
    MOD_DEC_USE_COUNT;
    return 0;
}

I want whenever module is loaded it should create a file and when it unloaded should
remove file. but above code is fail to create a file and also causing problem in unloading
a module with warning for arg 1 parameter of flip_close.

help to write a module to read/write a normal file from kernel module.

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