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SubjectRe: ERROR: "__umoddi3" [drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.ko] undefined!
On Mon, Sep 30, 2019 at 05:45:35PM +0200, Michal Kubecek wrote:
> On Mon, Sep 30, 2019 at 04:13:17PM +0200, Borislav Petkov wrote:
> > I'm seeing this on i386 allyesconfig builds of current Linus master:
> >
> > ERROR: "__umoddi3" [drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.ko] undefined!
> > make[1]: *** [__modpost] Error 1
> > make: *** [modules] Error 2
>
> This is usually result of dividing (or modulo) by a 64-bit integer. Can
> you identify where (file and line number) is the __umoddi3() call
> generated?

Did another 32-bit allyesconfig build. It said:

ld: drivers/net/ethernet/mellanox/mlx5/core/steering/dr_icm_pool.o: in function `mlx5dr_icm_alloc_chunk':
dr_icm_pool.c:(.text+0x733): undefined reference to `__umoddi3'
make: *** [vmlinux] Error 1

The .s file then points to the exact location:

# drivers/net/ethernet/mellanox/mlx5/core/steering/dr_icm_pool.c:140: align_diff = icm_mr->icm_start_addr % align_base;
pushl %ebx # align_base
pushl %ecx # align_base
call __umoddi3 #
popl %edx #
popl %ecx #

HTH.

--
Regards/Gruss,
Boris.

https://people.kernel.org/tglx/notes-about-netiquette

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