Re: [PATCH 1/1] drivers/staging/pi433: New driver

Dan Carpenter
2017-07-20T11:37:31Z

On Thu, Jul 20, 2017 at 01:23:05PM +0200, Marcus Wolf wrote:
> Hi Greg,
>
> below you can see the report with the error on m68k. It was sent to me from a
> test robot of intel.
>
> According to my research, this problem occured, because there is no hardware
> support for floating point on the m68k (or it was configured not to use it).
> Therefore gcc uses an internal function, provided by libgcc. Obviously libgcc
> wasn't linked...
>
> I don't know how to come arround this problem by modifying my code (except
> reducing the accuracy of the calculation by not using floating point).

I don't see any floating point? You're not allowed to use floating
point in the kernel.

>
> Can we ignore the error or can I do something else?
> Maybe a special include just in case of m68k can help??!?
> I don't have an environment for building m68k.
>

I think the answer is to use div_u64() and div64_u64 instead of
do_div()? Or you could just add a depend in the Kconfig.

regards,
dan carpenter