Subject: Re: linux-next: build failure after merge of the hyperv tree

From: Wei Liu <[email-masked]>
Date: Mon, 20 Oct 2025 17:27:19 +0000

On Mon, Oct 20, 2025 at 01:31:44PM +1100, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the hyperv tree, today's linux-next build (x86_64
> allmodconfig) failed like this:
> 
> arch/x86/hyperv/hv_init.c: In function 'hyperv_init':
> arch/x86/hyperv/hv_init.c:558:17: error: implicit declaration of function 'hv_root_crash_init' [-Wimplicit-function-declaration]
>   558 |                 hv_root_crash_init();
>       |                 ^~~~~~~~~~~~~~~~~~
> 
> Caused by commit
> 
>   60116744be53 ("x86/hyperv: Enable build of hypervisor crashdump collection files")
> 
> $ grep CONFIG_MSHV_ROOT .config
> $
> 
> I have used the hyperv tree from next-20251017 for today.

Thanks for the report. I will fix it in hyperv-next.

Wei

> -- 
> Cheers,
> Stephen Rothwell