rtc: mrst: remove set but not used variable 'valid'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/rtc/rtc-mrst.c: In function 'mrst_procfs':
drivers/rtc/rtc-mrst.c:264:29: warning:
 variable 'valid' set but not used [-Wunused-but-set-variable]
  unsigned char rtc_control, valid;

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

diff --git a/drivers/rtc/rtc-mrst.c b/drivers/rtc/rtc-mrst.c
index bf2d7af03d075eac790978edff6331654771d803..daf354a6a853f34abbd2f7eb043b7a551d777d43 100644 (file)
--- a/drivers/rtc/rtc-mrst.c
+++ b/drivers/rtc/rtc-mrst.c
@@ -261,11 +261,10 @@ static int mrst_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
 
 static int mrst_procfs(struct device *dev, struct seq_file *seq)
 {
-       unsigned char   rtc_control, valid;
+       unsigned char   rtc_control;
 
        spin_lock_irq(&rtc_lock);
        rtc_control = vrtc_cmos_read(RTC_CONTROL);
-       valid = vrtc_cmos_read(RTC_VALID);
        spin_unlock_irq(&rtc_lock);
 
        seq_printf(seq,