Hi, currently, there is no uniformed way to mmap the pages allocated via dma_alloc_coherent() properly. This is a long-standing issue in the ALSA PCM code, which causes Oops on some non-coherent architectures. ARM has already a function dma_mmap_coherent() for that purpose. This patch series is for adding the same function to other major architectures to improve the situation (read: not "solve" perfectly :) I tried to keep the addition as simple and small as possible. As I couldn't do build tests on some archs, some patches might be wrong. A fix patch would be appreciated. Also, I added ARCH_HAS_DMA_MMAP_COHERENT for each definition so that the caller can know whether the function is available. This is actually more helpful than giving a dummy inline function (at least in the case of ALSA code) since it can be optimized at the compile time. Maybe another name would be better, or there is a more clever way. In anyways, comments and suggestions are greatly appreciated. The patches can be found on test/dma-fix branch of sound git tree, too. git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6.git test/dma-fix thanks, Takashi -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
