[RFCLUE4] scatterlist changes

[William D Waddington <william.waddington@beezmo.com>]

Hi,

I have just tripped over the scatterlist changes in my out-of-tree
drivers.  I'll deal with it.  When the API stabilizes...

It does bring to mind a simple question:  why limit the scatterlist
to a single page, or require a multiple-page list to be dealt with
as individual pages?

Is this just to avoid vmalloc use?  I don't see anything that requires
a scatterlist to be in physically contiguous memory (at a quick glance
anyway) other than perhaps a preference for the initial allocation
mechanism.  (My actual IOPB list for the DMA hardware is a different
matter entirely, but I don't _think_ I'm confusing the two).

Thanks,
Bill
-- 
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William D Waddington
Bainbridge Island, WA, USA
william.waddington@beezmo.com
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"Even bugs...are unexpected signposts on
the long road of creativity..." - Ken Burtch