Re: [akpm-mm:mm-nonmm-unstable 49/110] __efistub_cmdline.c:undefined reference to `__efistub___lshrdi3'

[Andrew Morton <akpm@linux-foundation.org>]

On Wed, 04 Mar 2026 16:35:01 +0100 "Ard Biesheuvel" <ardb@kernel.org> wrote:

> Hi Andy,
> 
> On Wed, 4 Mar 2026, at 15:24, Andy Shevchenko wrote:
> > And since it's riscv, adding people from there.
> >
> > It might be that they simply need to include the corresponding library to their
> > architecture builds (we have lib/lshrdi3.c)
> >
> 
> I didn't manage to reproduce this, but if EFI boot on 32-bit RISC-V is really a thing, then doing the below should be sufficient. Alternatively, we might just disable EFI boot on 32-bit RISC-V, as I don't think it is likely to be used by anyone in practice.
> 
> --- a/arch/riscv/kernel/image-vars.h
> +++ b/arch/riscv/kernel/image-vars.h
> @@ -31,6 +31,7 @@ __efistub___init_text_end     = __init_text_end;
>  #if defined(CONFIG_EFI_EARLYCON) || defined(CONFIG_SYSFB)
>  __efistub_sysfb_primary_display        = sysfb_primary_display;
>  #endif
> +PROVIDE(__efistub___lshrdi3    = __lshrdi3);
>  

I haven't incorporated this, so the series will still break the build.

Dmitry, can you please test, review and ack this?  Or should I drop the
series and we revisit for the next cycle?