Re: kvm: x86-32 fails to link with tdp_mmu

[Sean Christopherson]

On Fri, Oct 23, 2020 at 09:13:21PM -0500, Daniel Díaz wrote:
> Hello!
> 
> We found the following problem building torvalds/master, which
> recently merged the for-linus tag from the KVM tree, when building
> with gcc 7.3.0 and glibc 2.27 for x86 32-bits under OpenEmbedded:
> 
> |   LD      vmlinux.o
> |   MODPOST vmlinux.symvers
> |   MODINFO modules.builtin.modinfo
> |   GEN     modules.builtin
> |   LD      .tmp_vmlinux.kallsyms1
> | arch/x86/kvm/mmu/tdp_mmu.o: In function `__handle_changed_spte':
> | tdp_mmu.c:(.text+0x78a): undefined reference to `__umoddi3'

The problem is a % on a 64-bit value.  Patches incoming, there's also a goof
in similar code that was tweaked last minute to avoid the %.