From 9393996761e23280f259d706133c8f0cd139fd58 Mon Sep 17 00:00:00 2001 From: Alexandre Belloni Date: Thu, 14 May 2015 22:39:06 +0200 Subject: [PATCH] rtc: mt6397: fix build on some 32bits platforms On some !ARM 32bits platforms, the following compilation error happens because of the division on a 64bits value in mtk_rtc_read_time(): drivers/built-in.o: In function `mtk_rtc_read_time': rtc-mt6397.c:(.text+0x265d13f): undefined reference to `__divdi3' rtc-mt6397.c:(.text+0x265d150): undefined reference to `__moddi3' Use div_s64() as done in rtc_time64_to_tm() to solve that. Reported-by: kbuild test robot Acked-by: Eddie Huang Signed-off-by: Alexandre Belloni --- drivers/rtc/rtc-mt6397.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/rtc/rtc-mt6397.c b/drivers/rtc/rtc-mt6397.c index 8bed852e4961..c0090b698ff3 100644 --- a/drivers/rtc/rtc-mt6397.c +++ b/drivers/rtc/rtc-mt6397.c @@ -150,7 +150,7 @@ static int mtk_rtc_read_time(struct device *dev, struct rtc_time *tm) { time64_t time; struct mt6397_rtc *rtc = dev_get_drvdata(dev); - int sec, ret; + int days, sec, ret; do { ret = __mtk_rtc_read_time(rtc, tm, &sec); @@ -171,7 +171,8 @@ static int mtk_rtc_read_time(struct device *dev, struct rtc_time *tm) /* rtc_tm_to_time64 covert Gregorian date to seconds since * 01-01-1970 00:00:00, and this date is Thursday. */ - tm->tm_wday = (time / 86400 + 4) % 7; + days = div_s64(time, 86400); + tm->tm_wday = (days + 4) % 7; exit: return ret;