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Subject: Re: [PATCH -next] x86/kvm: fix a missing-prototypes "vmread_error"
To:     Qian Cai <cai@lca.pw>
Cc:     sean.j.christopherson@intel.com, kvm@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <20200402153955.1695-1-cai@lca.pw>
From:   Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <2e823923-4b81-8cb5-59f6-4376dc71fce2@redhat.com>
Date:   Thu, 2 Apr 2020 21:23:06 +0200
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On 02/04/20 17:39, Qian Cai wrote:
> The commit 842f4be95899 ("KVM: VMX: Add a trampoline to fix VMREAD error
> handling") removed the declaration of vmread_error() causes a W=1 build
> failure with KVM_WERROR=y. Fix it by adding it back.
> 
> arch/x86/kvm/vmx/vmx.c:359:17: error: no previous prototype for 'vmread_error' [-Werror=missing-prototypes]
>  asmlinkage void vmread_error(unsigned long field, bool fault)
>                  ^~~~~~~~~~~~
> 
> Signed-off-by: Qian Cai <cai@lca.pw>
> ---
>  arch/x86/kvm/vmx/ops.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/x86/kvm/vmx/ops.h b/arch/x86/kvm/vmx/ops.h
> index 09b0937d56b1..19717d0a1100 100644
> --- a/arch/x86/kvm/vmx/ops.h
> +++ b/arch/x86/kvm/vmx/ops.h
> @@ -12,6 +12,7 @@
>  
>  #define __ex(x) __kvm_handle_fault_on_reboot(x)
>  
> +asmlinkage void vmread_error(unsigned long field, bool fault);
>  __attribute__((regparm(0))) void vmread_error_trampoline(unsigned long field,
>  							 bool fault);
>  void vmwrite_error(unsigned long field, unsigned long value);
> 

Merged, thanks.

Paolo