irnet_ppp: BKL pushdown

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/net/irda/irnet/irnet.h b/net/irda/irnet/irnet.h
index b001c36..bccf4d0 100644
--- a/net/irda/irnet/irnet.h
+++ b/net/irda/irnet/irnet.h
@@ -241,6 +241,7 @@
 #include <linux/module.h>
 
 #include <linux/kernel.h>
+#include <linux/smp_lock.h>
 #include <linux/skbuff.h>
 #include <linux/tty.h>
 #include <linux/proc_fs.h>