On Wed, 2010-02-24 at 08:16 +0100, Oliver Neukum wrote: > I don't know. The issue seems quite complex. It would seem better to > centralize it as far as practical. Do you have a wrapper drivers could > call? flush_dcache_page() ? :-) Now, the subsystem might be the one to know whether something is mapped into userspace or not (v4l in our case) in which case a wrapper could be created. Cheers, Ben. -- 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