On Thu, Apr 07, 2022 at 09:27:44AM +0800, Linyu Yuan wrote: > Add API trace_usb_configfs_link/unlink_group() to trace user space > link/unlink a group like add function to configuration or > remove function from configuration. > If a specific function need link/unlink, it also can be used. Doesn't configfs have generic trace functions like this? What is this going to show you? Userspace is the thing causing these events to happen, why do you need trace events for any of these configfs things? Who is going to use this, and what are they all going to be used for? thanks, greg k-h