diff -urN oldtree/include/linux/init_task.h newtree/include/linux/init_task.h
--- oldtree/include/linux/init_task.h	2006-09-26 14:32:04.000000000 -0400
+++ newtree/include/linux/init_task.h	2006-09-26 15:06:32.000000000 -0400
@@ -189,6 +189,7 @@
 		.signal = {{0}}},					\
 	.blocked	= {{0}},					\
 	.alloc_lock	= __SPIN_LOCK_UNLOCKED(tsk.alloc_lock),		\
+	.mutexes_held	= 0,						\
 	.journal_info	= NULL,						\
 	.cpu_timers	= INIT_CPU_TIMERS(tsk.cpu_timers),		\
 	.fs_excl	= ATOMIC_INIT(0),				\
diff -urN oldtree/include/linux/sched.h newtree/include/linux/sched.h
--- oldtree/include/linux/sched.h	2006-09-26 14:34:25.000000000 -0400
+++ newtree/include/linux/sched.h	2006-09-26 15:06:32.000000000 -0400
@@ -1041,6 +1041,7 @@
 	struct held_lock held_locks[MAX_LOCK_DEPTH];
 	unsigned int lockdep_recursion;
 #endif
+	unsigned long mutexes_held;
 
 /* journalling filesystem info */
 	void *journal_info;
diff -urN oldtree/kernel/fork.c newtree/kernel/fork.c
--- oldtree/kernel/fork.c	2006-09-24 17:03:56.000000000 -0400
+++ newtree/kernel/fork.c	2006-09-26 15:06:32.000000000 -0400
@@ -1053,6 +1053,7 @@
 	p->io_context = NULL;
 	p->io_wait = NULL;
 	p->audit_context = NULL;
+	p->mutexes_held = 0;
 	cpuset_fork(p);
 #ifdef CONFIG_NUMA
  	p->mempolicy = mpol_copy(p->mempolicy);
diff -urN oldtree/kernel/mutex.c newtree/kernel/mutex.c
--- oldtree/kernel/mutex.c	2006-09-24 17:03:56.000000000 -0400
+++ newtree/kernel/mutex.c	2006-09-26 15:06:32.000000000 -0400
@@ -60,6 +60,16 @@
 static void fastcall noinline __sched
 __mutex_lock_slowpath(atomic_t *lock_count);
 
+static inline void inc_mutex_count(void)
+{
+	current->mutexes_held++;
+}
+
+static inline void dec_mutex_count(void)
+{
+	current->mutexes_held--;
+}
+
 /***
  * mutex_lock - acquire the mutex
  * @lock: the mutex to be acquired
@@ -89,6 +99,7 @@
 	 * 'unlocked' into 'locked' state.
 	 */
 	__mutex_fastpath_lock(&lock->count, __mutex_lock_slowpath);
+	inc_mutex_count();
 }
 
 EXPORT_SYMBOL(mutex_lock);
@@ -114,6 +125,7 @@
 	 * into 'unlocked' state:
 	 */
 	__mutex_fastpath_unlock(&lock->count, __mutex_unlock_slowpath);
+	dec_mutex_count();
 }
 
 EXPORT_SYMBOL(mutex_unlock);
@@ -274,9 +286,14 @@
  */
 int fastcall __sched mutex_lock_interruptible(struct mutex *lock)
 {
+	int ret;
+
 	might_sleep();
-	return __mutex_fastpath_lock_retval
+	ret = __mutex_fastpath_lock_retval
 			(&lock->count, __mutex_lock_interruptible_slowpath);
+	if (likely(!ret))
+		inc_mutex_count();
+	return ret;
 }
 
 EXPORT_SYMBOL(mutex_lock_interruptible);
@@ -331,8 +348,12 @@
  */
 int fastcall __sched mutex_trylock(struct mutex *lock)
 {
-	return __mutex_fastpath_trylock(&lock->count,
+	int ret = __mutex_fastpath_trylock(&lock->count,
 					__mutex_trylock_slowpath);
+
+	if (likely(ret))
+		inc_mutex_count();
+	return ret;
 }
 
 EXPORT_SYMBOL(mutex_trylock);
Files oldtree/scripts/kconfig/mconf and newtree/scripts/kconfig/mconf differ