PERFORCE change 213107 for review

[Robert N. M. Watson]

On 19 Jun 2012, at 01:29, Brooks Davis wrote:

> Change 213107 by brooks at brooks_ecr_current on 2012/06/19 00:28:56
> 
> 	Allow non-PAGE_SIZE sized and aligned regions as long as they are
> 	smaller than a page.  This allows us to provide trivial access to things
> 	like the buttons and switches bytes.


For the regular read(2)/write(2) interface, non-page-aligned and -sized regions are fine, but for mmap(2) they are problematic. Perhaps we should allow them only if mmap(2) access isn't requested in the device.hints configuration -- or at least device_printf() a warning about mmap(2) being disallowed?

Robert