linux-kernel - Re: [Xen-devel] [PATCH] xen/efi: have a common runtime setup function

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Date:   Tue, 1 Oct 2019 10:34:16 +0200
From:   Jan Beulich <jbeulich@...e.com>
To:     Juergen Gross <jgross@...e.com>
Cc:     x86@...nel.org, linux-arm-kernel@...ts.infradead.org,
        xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org,
        Borislav Petkov <bp@...en8.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Russell King <linux@...linux.org.uk>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Will Deacon <will@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [Xen-devel] [PATCH] xen/efi: have a common runtime setup function

On 01.10.2019 10:25, Juergen Gross wrote:
> @@ -281,4 +270,26 @@ void xen_efi_reset_system(int reset_type, efi_status_t status,
>  		BUG();
>  	}
>  }
> -EXPORT_SYMBOL_GPL(xen_efi_reset_system);
> +
> +/*
> + * Set XEN EFI runtime services function pointers. Other fields of struct efi,
> + * e.g. efi.systab, will be set like normal EFI.
> + */
> +void __init xen_efi_runtime_setup(void)
> +{
> +	efi.get_time			= xen_efi_get_time;
> +	efi.set_time			= xen_efi_set_time;
> +	efi.get_wakeup_time		= xen_efi_get_wakeup_time;
> +	efi.set_wakeup_time		= xen_efi_set_wakeup_time;
> +	efi.get_variable		= xen_efi_get_variable;
> +	efi.get_next_variable		= xen_efi_get_next_variable;
> +	efi.set_variable		= xen_efi_set_variable;
> +	efi.set_variable_nonblocking	= xen_efi_set_variable;
> +	efi.query_variable_info		= xen_efi_query_variable_info;
> +	efi.query_variable_info_nonblocking = xen_efi_query_variable_info;
> +	efi.update_capsule		= xen_efi_update_capsule;
> +	efi.query_capsule_caps		= xen_efi_query_capsule_caps;
> +	efi.get_next_high_mono_count	= xen_efi_get_next_high_mono_count;
> +	efi.reset_system		= xen_efi_reset_system;
> +}
> +EXPORT_SYMBOL_GPL(xen_efi_runtime_setup);

I don't think exporting an __init function is a good idea, and I also
don't see why the function would need exporting had it had the __init
dropped. With the line dropped
Reviewed-by: Jan Beulich <jbeulich@...e.com>

Jan