Ensure that we export __fatal_signal_pending()

It may be used by the modules nfs.ko and sunrpc.ko
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
[ Made it a regular export rather than GPL-only  - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

kernel/signal.c

@@ -998,6 +998,7 @@ int fastcall __fatal_signal_pending(struct task_struct *tsk)
 {
 	return sigismember(&tsk->pending.signal, SIGKILL);
 }
+EXPORT_SYMBOL(__fatal_signal_pending);
 
 /*
  * Must be called under rcu_read_lock() or with tasklist_lock read-held.