Re: [PATCH 03/13] scsi: unify allocation of scsi command and sense buffer

[Roland Dreier]

 > Ideally there should be a MACRO that is defined to WORD_SIZE on cache-coherent
 > ARCHs and to SMP_CACHE_BYTES on none-cache-coherent systems and use that size
 > at the __align() attribute. (So only stupid ARCHES get hurt)

this seems to come up repeatedly -- I had a proposal a _long_ time ago
that never quite got merged, cf http://lwn.net/Articles/2265/ and
http://lwn.net/Articles/2269/ -- from 2002 (!?).  The idea is to go a
step further and create a __dma_buffer annotation for structure members.

Maybe I should resurrect that work one more time?

 - R.
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