clocksource/drivers/arc_timer: Use BIT() instead of _BITUL()

This is in-kernel C code, so there is no reason to use _BITUL().
Replace it with equivalent BIT().

I added #include <linux/bits.h> explicitly although it has been included
by other headers eventually.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/clocksource/arc_timer.c b/drivers/clocksource/arc_timer.c
index b28970ca4a7a..b1f21bf3b83c 100644
--- a/drivers/clocksource/arc_timer.c
+++ b/drivers/clocksource/arc_timer.c
@@ -16,6 +16,7 @@
  */
 
 #include <linux/interrupt.h>
+#include <linux/bits.h>
 #include <linux/clk.h>
 #include <linux/clk-provider.h>
 #include <linux/clocksource.h>
@@ -142,7 +143,7 @@ static u64 arc_read_rtc(struct clocksource *cs)
                 l = read_aux_reg(AUX_RTC_LOW);
                 h = read_aux_reg(AUX_RTC_HIGH);
                 status = read_aux_reg(AUX_RTC_CTRL);
-        } while (!(status & _BITUL(31)));
+        } while (!(status & BIT(31)));
 
         return (((u64)h) << 32) | l;
 }