Hi all,
How to use sys_mknod function call in the driver init_module.
Currently my init_module function looks like as follows. I am trying
to create a device file in my init_module itself.
static int __init init_my_module(void)
{
char device_name[15] = {'\0'};
Major = register_chrdev(0, DEVICE_NAME, &fops);
if(Major < 0)
{
printk(KERN_ALERT "Registering char device failed with %d\n", Major);
return Major;
}
printk(KERN_INFO "I was assigned major number %d. To talk to
\n", Major);
printk(KERN_INFO "the driver\n");
printk(KERN_INFO "Try various minor numbers. Try to cat and
echo to\n"); printk(KERN_INFO "the device file.\n");
printk(KERN_INFO "Remove the device file and module when done.\n");
sys_mknod = sys_call_table[ __NR_mknod];
sprintf(device_name, "/dev/%s", DEVICE_NAME);
set_fs( get_ds() );
sys_mknod(device_name, S_IFCHR|0666, MKDEV(Major,1));
return SUCCESS;
}
I am getting following warning....
*** Warning: "sys_call_table"
[/home/NTEK-APPL/MODULE_PG/CHP4/chardev.ko] undefined!
It looks like to me "sys_call_table" is not exported to kernel.
If it is true then how to export it else how to solve this problem.
Currently I am manually creating the device file using mknod in shell.
Thanks
Manjunath Naik
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