--- linux/kernel/sched.c.orig2	
+++ linux/kernel/sched.c	
@@ -4926,9 +4926,11 @@ EXPORT_SYMBOL(__might_sleep);
 #define BUILD_LOCK_OPS(op, locktype)					\
 void __sched op##_lock(locktype *lock)					\
 {									\
+	unsigned long count = 0;					\
 	for (;;) {							\
 		if (likely(_raw_##op##_trylock(lock)))			\
 			break;						\
+		count++;						\
 		preempt_disable();					\
 		touch_preempt_timing();					\
 		preempt_enable();					\
@@ -4937,16 +4939,19 @@ void __sched op##_lock(locktype *lock)		
 		cpu_relax();						\
 	}								\
 	preempt_disable();						\
+	__trace((unsigned long)op##_lock, count);			\
 }									\
 									\
 EXPORT_SYMBOL(op##_lock);						\
 									\
 void __sched __##op##_lock_irqsave(locktype *lock, unsigned long *flags)\
 {									\
+	unsigned long count = 0;					\
 	for (;;) {							\
 		local_irq_save(*flags);					\
 		if (likely(_raw_##op##_trylock(lock)))			\
 			break;						\
+		count++;						\
 		local_irq_restore(*flags);				\
 									\
 		preempt_disable();					\
@@ -4957,6 +4962,7 @@ void __sched __##op##_lock_irqsave(lockt
 			(lock)->break_lock = 1;				\
 		cpu_relax();						\
 	}								\
+	__trace((unsigned long)__##op##_lock_irqsave, count);		\
 	preempt_disable();						\
 }									\
 									\