Hi,
Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> writes:
>> +struct dentry *usb_debugfs_init(void)
>> +{
>> + if (!usb_debug_root)
>> + usb_debug_root = debugfs_create_dir("usb", NULL);
>> +
>> + atomic_inc(&usb_debug_root_refcnt);
>> +
>> + return usb_debug_root;
>> +}
>> +EXPORT_SYMBOL_GPL(usb_debugfs_init);
>> +
>> +void usb_debugfs_cleanup(void)
>> +{
>> + if (atomic_dec_and_test(&usb_debug_root_refcnt)) {
>> + debugfs_remove_recursive(usb_debug_root);
>> + usb_debug_root = NULL;
>> + }
>> +}
>> +EXPORT_SYMBOL_GPL(usb_debugfs_cleanup);
>
> Only remove the debugfs subdir if the usbcore module is removed. Create
> the debugfs subdir when the usbcore module is loaded. No need for any
> reference counting of any sort at all. No need to overthink this :)
There is a slight need to overthink. He wants to use the same directory
for gadget-only builds too :-)
--
balbi
