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-rw-r--r--include/uapi/linux/serial.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/serial.h b/include/uapi/linux/serial.h
index 25331f9faa76..5d59c3ebf459 100644
--- a/include/uapi/linux/serial.h
+++ b/include/uapi/linux/serial.h
@@ -69,6 +69,7 @@ struct serial_struct {
#define SERIAL_IO_AU 4
#define SERIAL_IO_TSI 5
#define SERIAL_IO_MEM32BE 6
+#define SERIAL_IO_MEM16 7
#define UART_CLEAR_FIFO 0x01
#define UART_USE_FIFO 0x02