Index: genarch/include/fb/fb.h
===================================================================
--- genarch/include/fb/fb.h	(revision 9f581365c9675d07a5dcf5cc1cfcb67932a3cfef)
+++ genarch/include/fb/fb.h	(revision d9cf9d5f989f341220cb57edb35733010e85153c)
@@ -33,4 +33,5 @@
 #include <arch/types.h>
 
+extern spinlock_t fb_lock;
 void fb_init(__address addr, unsigned int x, unsigned int y, unsigned int bpp, unsigned int scan);