linux-kernel - Re: [PATCH 1/2] staging/vboxvideo: don't set dev_priv

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Message-ID: <20190204184911.GB2834@ravnborg.org>
Date:   Mon, 4 Feb 2019 19:49:11 +0100
From:   Sam Ravnborg <sam@...nborg.org>
To:     Daniel Vetter <daniel.vetter@...ll.ch>
Cc:     DRI Development <dri-devel@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Nicholas Mc Guire <der.herr@...r.at>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Daniel Vetter <daniel.vetter@...el.com>,
        Fabio Rafael da Rosa <fdr@...42.net>,
        Emil Velikov <emil.velikov@...labora.com>
Subject: Re: [PATCH 1/2] staging/vboxvideo: don't set dev_priv_size = 0

Hi Daniel

On Mon, Feb 04, 2019 at 11:31:13AM +0100, Daniel Vetter wrote:
> The compiler already clears this for us.
> 
> More important, someone might look what this is actually used for,
> and freak out about the dragon staring back at them.
> 
> Signed-off-by: Daniel Vetter <daniel.vetter@...el.com>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: Hans de Goede <hdegoede@...hat.com>
> Cc: Daniel Vetter <daniel.vetter@...ll.ch>
> Cc: Nicholas Mc Guire <der.herr@...r.at>
> Cc: Emil Velikov <emil.velikov@...labora.com>
> Cc: Fabio Rafael da Rosa <fdr@...42.net>
> ---
>  drivers/staging/vboxvideo/vbox_drv.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/staging/vboxvideo/vbox_drv.c b/drivers/staging/vboxvideo/vbox_drv.c
> index b0d73d5fba5d..43c3d0a4fa1a 100644
> --- a/drivers/staging/vboxvideo/vbox_drv.c
> +++ b/drivers/staging/vboxvideo/vbox_drv.c
> @@ -222,7 +222,6 @@ static void vbox_master_drop(struct drm_device *dev, struct drm_file *file_priv)
>  static struct drm_driver driver = {
>  	.driver_features =
>  	    DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME | DRIVER_ATOMIC,
> -	.dev_priv_size = 0,
>  
>  	.lastclose = drm_fb_helper_lastclose,
>  	.master_set = vbox_master_set,

I have stared at the file for a long time and so far no dragon
was staring back at me. There was a few "#ifdef" that screamed
at me, and a drm_fb_helper_fbdev_setup() that looked
suspicious alas no dragon :-(

As for the change above, dragon or no dragon:
Reviewed-by: Sam Ravnborg <sam@...nborg.org>

	Sam