HZ notdef; NO_HZ=y, HZ=250
  CC      init/main.o
In file included from mmotm-2008-0318-1720/include/linux/rcupdate.h:59,
                 from mmotm-2008-0318-1720/include/linux/rculist.h:10,
                 from mmotm-2008-0318-1720/include/linux/dcache.h:8,
                 from mmotm-2008-0318-1720/include/linux/fs.h:278,
                 from mmotm-2008-0318-1720/include/linux/proc_fs.h:5,
                 from mmotm-2008-0318-1720/init/main.c:14:
mmotm-2008-0318-1720/include/linux/rcupreempt.h: In function 'rcu_enter_nohz':
  CC      init/do_mounts.o
mmotm-2008-0318-1720/include/linux/rcupreempt.h:92: error: 'HZ' undeclared (first use in this function)
mmotm-2008-0318-1720/include/linux/rcupreempt.h:92: error: (Each undeclared identifier is reported only once
mmotm-2008-0318-1720/include/linux/rcupreempt.h:92: error: for each function it appears in.)
mmotm-2008-0318-1720/include/linux/rcupreempt.h: In function 'rcu_exit_nohz':
mmotm-2008-0318-1720/include/linux/rcupreempt.h:99: error: 'HZ' undeclared (first use in this function)
make[2]: *** [init/main.o] Error 1

---
~Randy