On Mon, 18 May 2009 16:45:24 +0200 Arnd Bergmann <[email protected]> wrote:
> On Monday 18 May 2009, FUJITA Tomonori wrote: > > > > NACK'ed, sorry. > > I had no idea how hard it would get to fix a simple > allyesconfig build error. This is the third time > that a new approach to getting ATA to build on all > platforms is gets a NAK... > > > - these idndef tricks are really ugly and wrong. > > - these functions are not generic at all. > > I was trying to do two things at once: > > - provide a default implementation for each function > that an architecture can override, therefore the > #ifdef magic. I know what you tried with #ifdef but having something like '#define dma_map_sg' in arch's dma-mapping.h is unacceptable. > - Have a minimal working implementation of the API > that at least makes sense for architectures that > do not support DMA, but want to share some of the > code. Well, it might make sense but we don't call architectures that don't support DMA 'generic'. > Ten of the existing architectures simply try do a > linear mapping, and that should easily be possible > in a generic way not too different from what I posted. Your proposal doesn't work with arch/x86/kernel/pci-nommu.c, which is trying a linear mapping, what you are talking about. > Would you agree to a patch that works with the same > code on e.g. arm, microblaze, mn10300 and sh and > uses only a few #ifdefs? Having such helper for a linear mapping might be helpful but your approach is wrong. -- To unsubscribe from this list: send the line "unsubscribe linux-m68k" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
