__hcd 2319 drivers/usb/core/hcd.c irqreturn_t usb_hcd_irq (int irq, void *__hcd) __hcd 2321 drivers/usb/core/hcd.c struct usb_hcd *hcd = __hcd; __hcd 504 include/linux/usb/hcd.h extern irqreturn_t usb_hcd_irq(int irq, void *__hcd);