linux-kernel - Re: linux-next: build warnings after merge of the tip tree

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Date:   Fri, 1 Dec 2023 13:09:45 +0100
From:   Uros Bizjak <ubizjak@...il.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: build warnings after merge of the tip tree

On Fri, Dec 1, 2023 at 1:29 AM Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> Hi all,
>
> After merging the tip tree, today's linux-next build (x86_64 allmodconfig)
> produced these warnings:
>
> WARNING: modpost: EXPORT symbol "const_pcpu_hot" [vmlinux] version generation failed, symbol will not be versioned.
> Is "const_pcpu_hot" prototyped in <asm/asm-prototypes.h>?
> WARNING: modpost: "const_pcpu_hot" [arch/x86/kernel/msr.ko] has no CRC!
> WARNING: modpost: "const_pcpu_hot" [arch/x86/kvm/kvm.ko] has no CRC!

My build doesn't produce any warnings. A defconfig + enabling kvm.ko as module:

...
 AR      built-in.a
 AR      vmlinux.a
 LD      vmlinux.o
 OBJCOPY modules.builtin.modinfo
 GEN     modules.builtin
 MODPOST Module.symvers
 CC      .vmlinux.export.o
 CC [M]  arch/x86/kvm/kvm.mod.o
 CC [M]  fs/efivarfs/efivarfs.mod.o
...

Does the attached patch help? Or is there anything else I should do to
trigger the above problem?

Thanks,
Uros.

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