[RFC PATCH v2 38/78] system/rtc.c: add fallthrough pseudo-keyword

[Emmanouil Pitsidianakis <manos.pitsidianakis@linaro.org>]

In preparation of raising -Wimplicit-fallthrough to 5, replace all
fall-through comments with the fallthrough attribute pseudo-keyword.

Signed-off-by: Emmanouil Pitsidianakis <manos.pitsidianakis@linaro.org>
---
 system/rtc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/system/rtc.c b/system/rtc.c
index 4904581abe..bb406542c8 100644
--- a/system/rtc.c
+++ b/system/rtc.c
@@ -48,22 +48,22 @@ QEMUClockType rtc_clock;
 /***********************************************************/
 /* RTC reference time/date access */
 static time_t qemu_ref_timedate(QEMUClockType clock)
 {
     time_t value = qemu_clock_get_ms(clock) / 1000;
     switch (clock) {
     case QEMU_CLOCK_REALTIME:
         value -= rtc_realtime_clock_offset;
-        /* fall through */
+        fallthrough;
     case QEMU_CLOCK_VIRTUAL:
         value += rtc_ref_start_datetime;
         break;
     case QEMU_CLOCK_HOST:
         if (rtc_base_type == RTC_BASE_DATETIME) {
             value -= rtc_host_datetime_offset;
         }
         break;
     default:
         assert(0);
     }
     return value;
 }
-- 
2.39.2