From mboxrd@z Thu Jan  1 00:00:00 1970
From: dhylands@gmail.com (Dave Hylands)
Date: Tue, 28 Jun 2011 10:41:08 -0700
Subject: debugging enabled? (was Re: KGDB command line options not working
	for kernel 2.6.32)
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	<20110627184043.GC15361@trikaliotis.net>
	<BANLkTi=B5BpS226h3P-Jm=Vqj=VMjWcq+w@mail.gmail.com>
	<BANLkTineCVLz-3+a98b9iT490u4RG6Satg@mail.gmail.com>
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To: kernelnewbies@lists.kernelnewbies.org
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Hi Prabhu,

On Mon, Jun 27, 2011 at 11:25 PM, Prabhu nath <gprabhunath@gmail.com> wrote:
> Hi Mulyadi/Spiro,
>
> ?????????? Can you please help me in partially enabling/disabling
> optimizations, because I was consistently hitting at the below problem when
> building the kernel after disabling the optimization
>
> ERROR: "intel_gmbus_is_forced_bit" [drivers/gpu/drm/i915/i915.ko] undefined!
> ERROR: "__udivdi3" [drivers/gpu/drm/i915/i915.ko] undefined!
> make[2]: *** [__modpost] Error 1
> make[1]: *** [modules] Error 2
> make: *** [sub-make] Error 2

This is happening because some code is trying to do 64-bit division
which isn't supported in the kernel. The code needs to be modified to
use do_div macro (which is available in either asm/div64.h).

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