kobject_synth_uevent
rc = kobject_synth_uevent(&drv->p->kobj, buf, count);
ret = kobject_synth_uevent(&sp->subsys.kobj, buf, count);
rc = kobject_synth_uevent(&dev->kobj, buf, count);
int kobject_synth_uevent(struct kobject *kobj, const char *buf, size_t count);
rc = kobject_synth_uevent(&mk->kobj, buffer, count);