10-STABLE merge of lemul64

[Edward Tomasz Napierała]

On 0703T0850, Johannes Jost Meixner wrote:
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> Hi Glen,
> 
> Here's the PR you asked for:
> 
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=201299
> 
> I've discussed the merge with dchagin@, and he couldn't do it between
> code slush and code freeze because on his weekends he was busy doing
> other things.
> 
> I'm not sure how it breaks ABI compatibility -- as it's pretty much a
> drop-in replacement, and *ALL* linux tools just work. Including the
> 64bit stuff. I see it as an extension, at that.

Yup.  I also took a quick glance at changes to sys/sys/; one of the commits
extends 'struct thread', but it should be fine from ABI point of view, IIRC.