Re: [PATCH] cxl/region: Support multi-level interleaving with smaller granularities for lower levels

[Gregory Price]

On Fri, Oct 31, 2025 at 03:03:10PM +0800, kernel test robot wrote:
> Hi Robert,
> 
> All errors (new ones prefixed by >>, old ones prefixed by <<):
> 
> >> ERROR: modpost: "__udivdi3" [drivers/cxl/core/cxl_core.ko] undefined!
> 

IIRC this happens when you do 64-bit division because it's annoying and
complicated. Ran into this madness in mempolicy.

~Gregory