linux-kernel - Re: [PATCH v2 8/9] hyperv: avoid dependency on screen

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Message-ID: <877cqwhtbv.fsf@minerva.mail-host-address-is-not-set>
Date:   Wed, 19 Jul 2023 16:25:08 +0200
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     Arnd Bergmann <arnd@...nel.org>, linux-fbdev@...r.kernel.org,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Helge Deller <deller@....de>
Cc:     Arnd Bergmann <arnd@...db.de>,
        "David S. Miller" <davem@...emloft.net>,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Ard Biesheuvel <ardb@...nel.org>,
        Borislav Petkov <bp@...en8.de>, Brian Cain <bcain@...cinc.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Daniel Vetter <daniel@...ll.ch>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        David Airlie <airlied@...il.com>,
        Deepak Rawat <drawat.floss@...il.com>,
        Dexuan Cui <decui@...rosoft.com>,
        Dinh Nguyen <dinguyen@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Guo Ren <guoren@...nel.org>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Huacai Chen <chenhuacai@...nel.org>,
        Ingo Molnar <mingo@...hat.com>,
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        WANG Xuerui <kernel@...0n.name>, Wei Liu <wei.liu@...nel.org>,
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        linux-alpha@...r.kernel.org, linux-kernel@...r.kernel.org,
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        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH v2 8/9] hyperv: avoid dependency on screen_info

Arnd Bergmann <arnd@...nel.org> writes:

> From: Arnd Bergmann <arnd@...db.de>
>
> The two hyperv framebuffer drivers (hyperv_fb or hyperv_drm_drv) access the
> global screen_info in order to take over from the sysfb framebuffer, which
> in turn could be handled by simplefb, simpledrm or efifb. Similarly, the
> vmbus_drv code marks the original EFI framebuffer as reserved, but this
> is not required if there is no sysfb.
>
> As a preparation for making screen_info itself more local to the sysfb
> helper code, add a compile-time conditional in all three files that relate
> to hyperv fb and just skip this code if there is no sysfb that needs to
> be unregistered.
>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---

Reviewed-by: Javier Martinez Canillas <javierm@...hat.com>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat