Messages in this thread | | | Date | Sat, 19 Dec 2009 01:13:11 -0800 | Subject | Re: drivers/gpu/drm/radeon/radeon_test.c:45: undefined reference to `__udivdi3' | From | Dave Hylands <> |
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Hi Jim,
On Fri, Dec 18, 2009 at 12:54 PM, Mr. James W. Laferriere <babydr@baby-dragons.com> wrote: > Hello Benjamin , I am not having a good time compiling 2.6.32.1 . > First RCU 'inline' difficulties then fusion-mpt 'inline' difficulty , Now > this . > This one is not a simple as removing 'inline' from a statement . > Would you please look into this ? Anything else you need please just > ask . > Please cc: me as I am not subscribed to linux-fbdev . > > Tia , JimL > ...snip... > drivers/built-in.o(.text+0x11345a): In function `radeon_test_moves': > drivers/gpu/drm/radeon/radeon_test.c:45: undefined reference to `__udivdi3' > make: *** [.tmp_vmlinux1] Error 1
__udivdi3 is a gcc helper function used to do 64-bit division. This form of 64-bit division is not supported from within the kernel (which is why you get the undefined symbol).
There is <asm/div64.h> which contains a macro called do_div which can perform a 64-bit dvision by a 32-bit divisor.
-- Dave Hylands Shuswap, BC, Canada http://www.DaveHylands.com/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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