On 27 December 2016 at 08:36, Masahiro Yamada <yamada.masah...@socionext.com> wrote: > It is not safe to compare timer values directly. > > On 32-bit systems, for example, timer_get_us() wraps around every > 72 min. (2 ^ 32 / 1000000 =~ 4295 sec =~ 72 min). Depending on > the get_ticks() implementation, it may wrap more frequently. > The 72 min might be possible on the use of U-Boot. > > Let's borrow time_after, time_before, and friends to solve the > wrap-around problem. > > These macros were copied from include/linux/jiffies.h of Linux 4.9. > > Signed-off-by: Masahiro Yamada <yamada.masah...@socionext.com> > --- > > Changes in v2: None > > include/time.h | 41 +++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 41 insertions(+)
Reviewed-by: Simon Glass <s...@chromium.org> _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
