|SUBSYS_VIRTUAL_REGIS(9)||Device drivers infrastructure||SUBSYS_VIRTUAL_REGIS(9)|
subsys_virtual_register - register a subsystem at /sys/devices/virtual/
int subsys_virtual_register(struct bus_type * subsys, const struct attribute_group ** groups);
All 'virtual' subsystems have a /sys/devices/system/<name> root device with the name of the subystem. The root device can carry subsystem-wide attributes. All registered devices are below this single root device. There's no restriction on device naming. This is for kernel software constructs which need sysfs interface.
|January 2017||Kernel Hackers Manual 4.8.|