HelenOS sources

usb_polling_join  240 uspace/drv/bus/usb/usbhub/usbhub.c 	usb_polling_join(&hub->polling);
usb_polling_join  261 uspace/drv/bus/usb/usbhub/usbhub.c 	usb_polling_join(&hub->polling);
usb_polling_join  116 uspace/drv/hid/usbhid/main.c 	usb_polling_join(&hid_dev->polling);
usb_polling_join  151 uspace/lib/usbdev/include/usb/dev/poll.h errno_t usb_polling_join(usb_polling_t *);