On Mon, Feb 01, 2010 at 03:14:04PM -0500, Alan Stern wrote: > On Mon, 1 Feb 2010, Catalin Marinas wrote: > > > On Fri, 2010-01-29 at 18:54 +0000, Matthew Dharm wrote: > > > HOWEVER, I firmly believe that the cache-management functions belong with > > > the driver that actually talks to the low-level hardware, as that's the > > > only place where you can be 100% certain of what cache operations are > > > needed. After all, I think someone is working on a USB-over-IP transport, > > > and trying to manage cache at the usb-storage level in that scenario is > > > just silly. > > > > > > So, let's put this in the HCD drivers and be done with it. > > > > The patch below is what fixes the I-D cache incoherency issues on ARM. I > > don't particularly like the solution but it seems to be the only one > > available. > > > > IMHO, Linux should have functions similar to the DMA API but for PIO > > drivers (e.g. pio_map_single/pio_unmap_single) that non-coherent > > architectures can define, otherwise being no-ops. Any thoughts? > > You should bring this up on the linux-arm-kernel mailing list and CC: > the ARM maintainer. They are the ones most directly affected. > No, this belongs on linux-arch, as it's something that impacts a lot of people besides ARM. -- 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
