On Sun, Aug 21, 2011 at 16:09, Dmitry Torokhov wrote:

spi_write() requires use of DMA-safe (cacheline aligned) buffers.
Also use the same buffers when reading data since to avoid extra
locking and potential memory allocation in spi_write_then_read().

seems like there's a whole lot of style changes unrelated to spi and
dma ... more so than the actual dma/spi change.
-mike