New unaligned-accessed arch flag?

[Jeff Garzik]

Instead of putting arch-specific ifdefs in drivers, would it be
reasonable to add a per-arch flag UNALIGNED_PROFITABLE?  Arch-specific
ifdefs all over the default rx_copybreak values in net drivers are the
example I have in mind, but it seems like it would be good knowledge
that can be easily exposed to the rest of the kernel.

-- 
Jeff Garzik       | May you have warm words on a cold evening,
Building 1024     | a full mooon on a dark night,
MandrakeSoft      | and a smooth road all the way to your door.