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Message-ID: <202109270923.97AFDE89DB@keescook>
Date: Mon, 27 Sep 2021 09:23:45 -0700
From: Kees Cook <keescook@...omium.org>
To: Arnd Bergmann <arnd@...nel.org>
Cc: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>, Arnd Bergmann <arnd@...db.de>,
Alex Deucher <alexander.deucher@....com>,
Christian König <christian.koenig@....com>,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [RESEND] drm: fb_helper: fix CONFIG_FB dependency
On Mon, Sep 27, 2021 at 04:28:02PM +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
>
> With CONFIG_FB=m and CONFIG_DRM=y, we get a link error in the fb helper:
>
> aarch64-linux-ld: drivers/gpu/drm/drm_fb_helper.o: in function `drm_fb_helper_alloc_fbi':
> (.text+0x10cc): undefined reference to `framebuffer_alloc'
>
> Tighten the dependency so it is only allowed in the case that DRM can
> link against FB.
>
> Fixes: f611b1e7624c ("drm: Avoid circular dependencies for CONFIG_FB")
> Link: https://lore.kernel.org/all/20210721152211.2706171-1-arnd@kernel.org/
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
Thanks for fixing this!
Reviewed-by: Kees Cook <keescook@...omium.org>
--
Kees Cook
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