linux-kernel - Re: [PATCH v7 4/5] x86/paravirt: Remove const mark from x86_hyper_xen

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Date:   Tue, 16 Jul 2019 12:57:13 +0200
From:   Juergen Gross <jgross@...e.com>
To:     Zhenzhong Duan <zhenzhong.duan@...cle.com>,
        linux-kernel@...r.kernel.org
Cc:     bp@...en8.de, sstabellini@...nel.org, tglx@...utronix.de,
        xen-devel@...ts.xenproject.org, boris.ostrovsky@...cle.com,
        mingo@...hat.com
Subject: Re: [PATCH v7 4/5] x86/paravirt: Remove const mark from
 x86_hyper_xen_hvm variable

On 11.07.19 14:02, Zhenzhong Duan wrote:
> .. as "nopv" support needs it to be changeable at boot up stage.
> 
> Checkpatch report warning, so move variable declarations from
> hypervisor.c to hypervisor.h
> 
> Signed-off-by: Zhenzhong Duan <zhenzhong.duan@...cle.com>
> Cc: Boris Ostrovsky <boris.ostrovsky@...cle.com>
> Cc: Juergen Gross <jgross@...e.com>
> Cc: Stefano Stabellini <sstabellini@...nel.org>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: Borislav Petkov <bp@...en8.de>
> ---
>   arch/x86/include/asm/hypervisor.h | 8 ++++++++
>   arch/x86/kernel/cpu/hypervisor.c  | 8 --------
>   2 files changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/arch/x86/include/asm/hypervisor.h b/arch/x86/include/asm/hypervisor.h
> index f7b4c53..e41cbf2 100644
> --- a/arch/x86/include/asm/hypervisor.h
> +++ b/arch/x86/include/asm/hypervisor.h
> @@ -58,6 +58,14 @@ struct hypervisor_x86 {
>   	bool ignore_nopv;
>   };
>   
> +extern const struct hypervisor_x86 x86_hyper_vmware;
> +extern const struct hypervisor_x86 x86_hyper_ms_hyperv;
> +extern const struct hypervisor_x86 x86_hyper_xen_pv;
> +extern const struct hypervisor_x86 x86_hyper_kvm;
> +extern const struct hypervisor_x86 x86_hyper_jailhouse;
> +extern const struct hypervisor_x86 x86_hyper_acrn;
> +extern struct hypervisor_x86 x86_hyper_xen_hvm;

This should either stay const and be changed in patch 5, or you
should adapt its definition in arch/x86/xen/enlighten_hvm.c in
this patch.


Juergen