2010/9/25 Ira W. Snyder [off-list ref]:

This adds support for scatterlist to scatterlist DMA transfers.

This is a good idea, we have a local function to do this in DMA40 already,
stedma40_memcpy_sg().

This is
currently hidden behind a configuration option, which will allow drivers
which need this functionality to select it individually.

Why? Isn't it better to add this as a new capability flag
if you don't want to announce it? Or is the intent to save
memory footprint?

Yours,
Linus Walleij