Properly implement liballoc_free ()

kernel/proc/mutex.h

@@ -3,12 +3,13 @@
 
 #include <libk/std.h>
 #include <proc/suspension_q.h>
-#include <sync/spin_lock.h>
 
 struct proc;
+struct proc_resource;
 
 struct proc_mutex {
-  spin_lock_t lock;
+  struct proc_resource* resource;
+
   bool locked;
   struct proc_suspension_q suspension_q;
   struct proc* owner;