Changes to use deadlock detection.

kern/thread/synch.c

@@ -154,6 +154,8 @@ lock_create(const char *name)
                 return NULL;
         }
 
+	HANGMAN_LOCKABLEINIT(&lock->lk_hangman, lock->lk_name);
+
         // add stuff here as needed
 
         return lock;
@@ -173,14 +175,23 @@ lock_destroy(struct lock *lock)
 void
 lock_acquire(struct lock *lock)
 {
+	/* Call this (atomically) before waiting for a lock */
+	//HANGMAN_WAIT(&curthread->t_hangman, &lock->lk_hangman);
+
         // Write this
 
         (void)lock;  // suppress warning until code gets written
+
+	/* Call this (atomically) once the lock is acquired */
+	//HANGMAN_ACQUIRE(&curthread->t_hangman, &lock->lk_hangman);
 }
 
 void
 lock_release(struct lock *lock)
 {
+	/* Call this (atomically) when the lock is released */
+	//HANGMAN_RELEASE(&curthread->t_hangman, &lock->lk_hangman);
+
         // Write this
 
         (void)lock;  // suppress warning until code gets written