Index: sys/sys/proc.h
===================================================================
--- sys/sys/proc.h
+++ sys/sys/proc.h
@@ -323,6 +323,7 @@
 	struct proc	*td_rfppwait_p;	/* (k) The vforked child */
 	struct vm_page	**td_ma;	/* (k) uio pages held */
 	int		td_ma_cnt;	/* (k) size of *td_ma */
+	void		*td_emuldata;	/* Emulator state data */
 };
 
 struct mtx *thread_lock_block(struct thread *);