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-rw-r--r--drivers/char/moxa.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c
index 65b6ff2442c6..dd0083bbb64a 100644
--- a/drivers/char/moxa.c
+++ b/drivers/char/moxa.c
@@ -34,6 +34,7 @@
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/major.h>
+#include <linux/smp_lock.h>
#include <linux/string.h>
#include <linux/fcntl.h>
#include <linux/ptrace.h>