[PATCH] knfsd: nfsd4: grace period end

For the purposes of reboot recovery, we want to do some work during the
transition period at the end of the grace period.  Some of that work must be
guaranteed to have a certain relationship with the end of the grace period, so
we want to control the transition there.

Our approach is to modify the in_grace() checks to consult a global variable
instead of checking the time directly, to schedule the first run of the
laundromat thread at the end of the grace period, and to set the global
end-of-grace-period there.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>