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-rw-r--r--drivers/input/serio/maceps2.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/input/serio/maceps2.c b/drivers/input/serio/maceps2.c
index 558200e96d0..5a41b8f7f88 100644
--- a/drivers/input/serio/maceps2.c
+++ b/drivers/input/serio/maceps2.c
@@ -31,6 +31,8 @@ MODULE_LICENSE("GPL");
#define MACE_PS2_TIMEOUT 10000 /* in 50us unit */
+#define BIT(x) (1UL << (x))
+
#define PS2_STATUS_CLOCK_SIGNAL BIT(0) /* external clock signal */
#define PS2_STATUS_CLOCK_INHIBIT BIT(1) /* clken output signal */
#define PS2_STATUS_TX_INPROGRESS BIT(2) /* transmission in progress */