Hi, On 30/07/2018 21:53:14+0800, Jia-Ju Bai wrote: > omap_rtc_power_off() is never called in atomic context. > It calls mdelay() to busily wait, which is not necessary. > mdelay() can be replaced with msleep(). > > This is found by a static analysis tool named DCNS written by myself. > > Signed-off-by: Jia-Ju Bai <baijiaju1990@xxxxxxxxx> > --- > drivers/rtc/rtc-omap.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c > index 39086398833e..ef3d09525d0f 100644 > --- a/drivers/rtc/rtc-omap.c > +++ b/drivers/rtc/rtc-omap.c > @@ -476,7 +476,7 @@ static void omap_rtc_power_off(void) > * power off the system. Add a 500 ms margin for external latencies > * (e.g. debounce circuits). > */ > - mdelay(2500); > + msleep(2500); I'm not sure about that one because this is a poweroff function so it doesn't really make sense to sleep versus busy waiting (all the drivers in power/reset use mdelay()) -- Alexandre Belloni, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
