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int scull_init_module(void)
{
int result, i;

SET_MODULE_OWNER(&scull_fops);
#ifdef CONFIG_DEVFS_FS
/* If we have devfs, create /dev/scull to put files in there */
scull_devfs_dir = devfs_mk_dir(NULL, "scull", NULL);
if (!scull_devfs_dir) return -EBUSY; /* problem */

#else /* no devfs, do it the "classic" way */

/*
* Register your major, and accept a dynamic number. This is the
* first thing to do, in order to avoid releasing other module's
* fops in scull_cleanup_module()
*/
result = register_chrdev(scull_major, "scull", &scull_fops);
if (result < 0) {
printk(KERN_WARNING "scull: can't get major %d\n",scull_major);
return result;
}
if (scull_major == 0) scull_major = result; /* dynamic */

#endif /* CONFIG_DEVFS_FS */
/*
* allocate the devices -- we can't have them static, as the number
* can be specified at load time
*/
scull_devices = kmalloc(scull_nr_devs * sizeof(Scull_Dev), GFP_KERNEL);
if (!scull_devices) {
result = -ENOMEM;
goto fail;
}
memset(scull_devices, 0, scull_nr_devs * sizeof(Scull_Dev));
for (i=0; i < scull_nr_devs; i++) {
scull_devices[i].quantum = scull_quantum;
scull_devices[i].qset = scull_qset;
sema_init(&scull_devices[i].sem, 1);
#ifdef CONFIG_DEVFS_FS
sprintf(devname, "%i", i);
devfs_register(scull_devfs_dir, devname,
DEVFS_FL_AUTO_DEVNUM,
0, 0, S_IFCHR | S_IRUGO | S_IWUGO,
&scull_fops,
scull_devices+i);
#endif
}

/* At this point call the init function for any friend device */
if ( (result = scull_p_init()) )
goto fail;
if ( (result = scull_access_init()) )
goto fail;
/* ... */

#ifndef SCULL_DEBUG
EXPORT_NO_SYMBOLS; /* otherwise, leave global symbols visible */
#endif

#ifdef SCULL_DEBUG /* only when debugging */
scull_create_proc();
#endif

return 0; /* succeed */

fail:
scull_cleanup_module();
return result;
}

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