Problems with disabling Optimization

[Dave Hylands]

Hi Prabhu,

On Thu, Jun 2, 2011 at 3:28 AM, Prabhu nath <gprabhunath at gmail.com> wrote:
> Dear All,
>
>                Disabling O2 and Os on Kernel building, I am getting the
> following error. Can you please help me in debugging this.
>        Saw some info on the net, but could not resolve it.
>
> ERROR: "intel_gmbus_is_forced_bit" [drivers/gpu/drm/i915/i915.ko] undefined!
> ERROR: "__udivdi3" [drivers/gpu/drm/i915/i915.ko] undefined!

This means that your code is trying to do some type of 64-bit
arithmetic (probably a divide) which isn't directly supported in the
kernel.

There is a do_div macro/function from arch/arm/include/asm/div64.h, or
arch/x86/include/asm/div64.h

-- 
Dave Hylands
Shuswap, BC, Canada
http://www.davehylands.com