2.6.21-rc2-mm1 -- kernel/sched.c:3384: error: 'struct rq' has no member named 'in_nohz_recently'

["Miles Lane" <miles.lane@gmail.com>]

I ran "make oldconfig" and picked various options and then make hit:

  CC      kernel/sched.o
kernel/sched.c: In function 'trigger_load_balance':
kernel/sched.c:3384: error: 'struct rq' has no member named 'in_nohz_recently'
kernel/sched.c:3384: error: 'struct rq' has no member named 'idle_at_tick'
kernel/sched.c:3385: error: 'struct rq' has no member named 'in_nohz_recently'
kernel/sched.c:3387: error: 'nohz' undeclared (first use in this function)
kernel/sched.c:3387: error: (Each undeclared identifier is reported only once
kernel/sched.c:3387: error: for each function it appears in.)
kernel/sched.c:3404: warning: implicit declaration of function 'resched_cpu'
kernel/sched.c:3412: error: 'struct rq' has no member named 'idle_at_tick'
kernel/sched.c:3422: error: 'struct rq' has no member named 'idle_at_tick'
make[1]: *** [kernel/sched.o] Error 1

# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
CONFIG_IOSCHED_AS=y
CONFIG_IOSCHED_DEADLINE=y
CONFIG_IOSCHED_CFQ=y
# CONFIG_DEFAULT_AS is not set
# CONFIG_DEFAULT_DEADLINE is not set
CONFIG_DEFAULT_CFQ=y
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="cfq"