Sync with Linux 3.5

[Joseph S. Myers]

On Wed, 25 Jul 2012, Andreas Jaeger wrote:

> I've reviewed the header changes for Linux 3.5 and suggest the following
> changes. Tested on x86-64. Ok to commit?

With any sysdeps patch like this that looks like port maintainers may need 
corresponding updates to their ports, could you include a fuller 
description of the changes and how port maintainers can tell what they may 
need to change?

-- 
Joseph S. Myers
joseph@codesourcery.com