|| ||Takashi Iwai <firstname.lastname@example.org> |
|| ||email@example.com |
|| ||[PATCH 0/8] Add dma_mmap_coherent() for other archs |
|| ||Fri, 10 Jul 2009 15:10:42 +0200|
|| ||"Gerhard Pircher" <firstname.lastname@example.org>|
|| ||Article, Thread
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
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,