Update thread make priority_more public

src/threads/thread.c

@@ -70,9 +70,6 @@ static void *alloc_frame (struct thread *, size_t size);
 static void schedule (void);
 void thread_schedule_tail (struct thread *prev);
 static tid_t allocate_tid (void);
-static bool priority_more (const struct list_elem *a_,
-                           const struct list_elem *b_,
-                           void *aux UNUSED);
 
 /* Initializes the threading system by transforming the code
    that's currently running into a thread.  This can't work in
@@ -366,7 +363,7 @@ thread_foreach (thread_action_func *func, void *aux)
 /* Function that compares the two threads associated with the provided
    list_elem structures. Returns true if the thread associated with a_ has
    a higher priority than that of b_. */
-static bool
+bool
 priority_more (const struct list_elem *a_, const struct list_elem *b_,
                    void *aux UNUSED)
 {

src/threads/thread.h

@@ -131,6 +131,8 @@ void thread_yield (void);
 typedef void thread_action_func (struct thread *t, void *aux);
 void thread_foreach (thread_action_func *, void *);
 
+bool priority_more (const struct list_elem *a_, const struct list_elem *b_,
+                    void *aux UNUSED);
 int thread_get_priority (void);
 void thread_set_priority (int);