[PATCH] c/r: Take uts_sem during checkpoint (v2)

[Serge E. Hallyn]

Quoting Dan Smith (danms at us.ibm.com):
> SH> So it would be robust to future code changes if you
> 
> SH> #define MAX_UTS_LEN (__NEW_UTS_LEN+1)
> 
> SH> in utsname.h, so that anyone expanding the size of hostname
> SH> doesn't need to look for this usage.
> 
> Yeah, I think that came up in a prior round of comments on the UTS
> stuff, but got dropped when we started depending on strlen() of the
> names instead.  I suppose I should actually do it now... :)

Ok, please keep my Ack on the result.

thanks,
-serge