lab3.2: cv

kern/include/synch.h

@@ -127,6 +127,8 @@ struct cv {
         char *cv_name;
         // add what you need here
         // (don't forget to mark things volatile as needed)
+        struct wchan *wchan;
+        struct spinlock slk;
 };
 
 struct cv *cv_create(const char *name);