use spinlocks in MCS rwlock

kernel/fileobj.c

@@ -29,8 +29,7 @@
 #define	dkprintf(...)	do { if (0) kprintf(__VA_ARGS__); } while (0)
 #define	ekprintf(...)	kprintf(__VA_ARGS__)
 
-mcs_rwlock_lock_t fileobj_list_lock =
-	{{{0}, MCS_RWLOCK_TYPE_COMMON_READER, 0, 0, 0, NULL}, NULL};
+mcs_rwlock_lock_t fileobj_list_lock;
 static LIST_HEAD(fileobj_list);
 
 #define FILEOBJ_PAGE_HASH_SHIFT 9

kernel/process.c

@@ -3224,6 +3224,7 @@ process_unlock(struct process *proc, struct mcs_rwlock_node_irqsave *lock)
 void
 debug_log(unsigned long arg)
 {
+#if 0
 	struct process *p;
 	struct thread *t;
 	int i;
@@ -3276,4 +3277,5 @@ debug_log(unsigned long arg)
 		}
 		break;
 	}
+#endif
 }