Switch xtensa over to use the generic uncached support, and thus the
generic implementations of dma_alloc_* and dma_alloc_*, which also
gains support for mmaping DMA memory. The non-working nommu DMA
support has been disabled, but could be re-enabled easily if platforms
that actually have an uncached segment show up.
Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Max Filippov <jcmvbkbc@gmail.com> Tested-by: Max Filippov <jcmvbkbc@gmail.com>
gentwo / linux / .git / commit