On Fri, 13 Apr 2012, Johannes Stezenbach wrote: > > But there is no such thing as dynamic debug for ehci, is there? > > There's a separate dynamic debug setting for each dev_dbg statement. > > So your ideal solution makes no sense. > > When CONFIG_DYNAMIC_DEBUG=y but ehci debug is disabled There is no such thing as ehci debug! So how can it be disabled? There's only an individual setting for each line of debugging code. > in /sys/kernel/debug/dynamic_debug/control, then > dbg_port() calls dbg_port_buf() which would > format the string, then calls ehci_dbg() which > calls dev_dbg() which discards it. > > Does it make sense now? No. What happens if dynamic debug is enabled for one line that calls dbg_port_buf() but not for another? There's no way to avoid the string formatting in both lines, even though one of them discards the result. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
