Re: __udivdi3 and __umoddi3

[Jens Axboe <axboe@suse.de>]

On Wed, Jan 28 2004, Steven Schlansker wrote:
> I just upgraded to Debian testing, and am trying to compile a kernel 
> (2.6.0) again, this time using the kernel-source-2.6.0 package.  But, 
> it fails with the error:
> 
>   GEN     .version
>   CHK     include/linux/compile.h
>   UPD     include/linux/compile.h
>   CC      init/version.o
>   LD      init/mounts.o
>   LD      init/built-in.o
>   LD      .tmp_vmlinux1
> drivers/built-in.o(.text+0x37214): In function `start_request':
> : undefined reference to `__udivdi3'
> drivers/built-in.o(.text+0x3722c): In function `start_request':
> : undefined reference to `__umoddi3'

You have CONFIG_LBD set, and someone is doing a division in
start_request() without using sector_div(). Must be something that
the debian folks added, I don't see any divisions here.

> Where should I start looking?

In start_request()? :)

Or you could just turn off CONFIG_LBD, you likely don't need it.

-- 
Jens Axboe