On Fri, Aug 22, 2008 at 12:23:48PM +0200, Takashi Iwai wrote: > unsigned long prot = pgprot_val(_prot) & ~_CACHE_MASK; > #ifdef CONFIG_SGI_IP32 > #ifdef CONFIG_CPU_R10000 > prot = prot | _CACHE_UNCACHED_ACCELERATED; > #else > prot = prot | _CACHE_CACHABLE_NO_WA; > #endif > #else > prot = prot | _CACHE_UNCACHED; > #endif > return __pgprot(prot); this won't work for recording channels on IP32, because the write trough mapping will hide updates done via DMA. I'd start with just prot |= _CACHE_UNCACHED and if some MIPS system needs more specific treatment, we just add that later. Thomas. -- Crap can work. Given enough thrust pigs will fly, but it's not necessary a good idea. [ RFC1925, 2.3 ]
