diff --git a/include/linux/sched.h b/include/linux/sched.h
index 20b4f0372e44..5f5ab98bbb6b 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1101,7 +1101,6 @@ extern void force_sig_specific(int, struct task_struct *);
 extern int send_sig(int, struct task_struct *, int);
 extern void zap_other_threads(struct task_struct *p);
 extern int kill_pg(pid_t, int, int);
-extern int kill_sl(pid_t, int, int);
 extern int kill_proc(pid_t, int, int);
 extern struct sigqueue *sigqueue_alloc(void);
 extern void sigqueue_free(struct sigqueue *);