On Tue, Dec 11, 2001, David Brownell <[EMAIL PROTECTED]> wrote: > > All of the USB host controller drivers are PCI devices. > > Various folk have said they want to integrate patches > for some of those non-PCI OHCIs in the 2.5 tree, so I'd > expect that to change. > > Re the original patch, I think that's a case of "better safe > than sorry". Not DMAing to/from the stack is a general > rule for the whole kernel, not just USB.
I seem to recall Alan Cox mentioning that it's not guaranteed to be safe in any kernel since some architectures will move to a non DMA capable stack. IMHO, since the only safe thing to do across all architectures is to kmalloc the devrequest structure, anything other than that is essentially micro optimization that's not worth it. JE _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
