Re: [PATCH v3 7/9] KVM: x86: Drop __exit from kvm_x86_ops' hardware_unsetup()

[Vitaly Kuznetsov]

Sean Christopherson <sean.j.christopherson@xxxxxxxxx> writes:

> Remove the __exit annotation from VMX hardware_unsetup(), the hook
> can be reached during kvm_init() by way of kvm_arch_hardware_unsetup()
> if failure occurs at various points during initialization.
>
> Note, there is no known functional issue with the __exit annotation, the
> above is merely justification for its removal.  The real motivation is
> to be able to annotate vmx_x86_ops and svm_x86_ops with __initdata,
> which makes objtool complain because objtool doesn't understand that the
> vendor specific __initdata is being copied by value to a non-__initdata
> instance.
>
> Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
> ---
>  arch/x86/include/asm/kvm_host.h | 2 +-
>  arch/x86/kvm/vmx/vmx.c          | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> index 54f991244fae..42a2d0d3984a 100644
> --- a/arch/x86/include/asm/kvm_host.h
> +++ b/arch/x86/include/asm/kvm_host.h
> @@ -1056,7 +1056,7 @@ static inline u16 kvm_lapic_irq_dest_mode(bool dest_mode_logical)
>  struct kvm_x86_ops {
>  	int (*hardware_enable)(void);
>  	void (*hardware_disable)(void);
> -	void (*hardware_unsetup)(void);            /* __exit */
> +	void (*hardware_unsetup)(void);
>  	bool (*cpu_has_accelerated_tpr)(void);
>  	bool (*has_emulated_msr)(int index);
>  	void (*cpuid_update)(struct kvm_vcpu *vcpu);
> diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
> index 4bbe0d165a0c..fac22e316417 100644
> --- a/arch/x86/kvm/vmx/vmx.c
> +++ b/arch/x86/kvm/vmx/vmx.c
> @@ -7652,7 +7652,7 @@ static bool vmx_apic_init_signal_blocked(struct kvm_vcpu *vcpu)
>  	return to_vmx(vcpu)->nested.vmxon;
>  }
>  
> -static __exit void hardware_unsetup(void)
> +static void hardware_unsetup(void)
>  {
>  	if (nested)
>  		nested_vmx_hardware_unsetup();

Reviewed-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>

-- 
Vitaly