From: Andrew Morton <akpm@osdl.org>

kernel/sched.c: In function 'sched_init':
kernel/sched.c:7066: error: 'balancing' undeclared (first use in this function)

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Peter Williams <pwil3058@bigpond.net.au>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Cc: "Chen, Kenneth W" <kenneth.w.chen@intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 kernel/sched.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff -puN kernel/sched.c~sched-add-option-to-serialize-load-balancing-fix kernel/sched.c
--- a/kernel/sched.c~sched-add-option-to-serialize-load-balancing-fix
+++ a/kernel/sched.c
@@ -2880,7 +2880,7 @@ static void update_load(struct rq *this_
  *
  * Balancing parameters are set up in arch_init_sched_domains.
  */
-static spinlock_t balancing;
+static DEFINE_SPINLOCK(balancing);
 
 static void run_rebalance_domains(struct softirq_action *h)
 {
@@ -6879,7 +6879,6 @@ void __init sched_init(void)
 
 #ifdef CONFIG_RT_MUTEXES
 	plist_head_init(&init_task.pi_waiters, &init_task.pi_lock);
-	spin_lock_init(&balancing);
 #endif
 
 	/*
_