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From: Rob Herring <robh@kernel.org>
To: Kees Cook <keescook@chromium.org>
Cc: Dave Airlie <airlied@redhat.com>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Arnd Bergmann <arnd@kernel.org>,
	kernel test robot <lkp@intel.com>,
	Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>,
	Emma Anholt <emma@anholt.net>, Rob Clark <robdclark@gmail.com>,
	Sean Paul <sean@poorly.run>,
	Linus Walleij <linus.walleij@linaro.org>,
	Sam Ravnborg <sam@ravnborg.org>,
	linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
	linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org
Subject: Re: [PATCH 3/3] drm/pl111: depend on CONFIG_VEXPRESS_CONFIG
Date: Thu, 3 Jun 2021 14:54:03 -0500	[thread overview]
Message-ID: <CAL_JsqLF6WhsoSWtxVUqUPDRMM8qwGwZqWa_xtNqsVyq8OCz6w@mail.gmail.com> (raw)
In-Reply-To: <CAL_JsqLO_YbT3VU0+uHH2t6ONs_dWfBhqds9okYD0254ZiBf=A@mail.gmail.com>

On Thu, Jun 3, 2021 at 1:42 PM Rob Herring <robh@kernel.org> wrote:
>
> On Wed, Jun 2, 2021 at 4:53 PM Kees Cook <keescook@chromium.org> wrote:
> >
> > Avoid randconfig build failures by requiring VEXPRESS_CONFIG:
> >
> > aarch64-linux-gnu-ld: drivers/gpu/drm/pl111/pl111_versatile.o: in function `pl111_vexpress_clcd_init':
> > pl111_versatile.c:(.text+0x220): undefined reference to `devm_regmap_init_vexpress_config'
>
> pl111_vexpress_clcd_init() starts with:
>
> if (!IS_ENABLED(CONFIG_VEXPRESS_CONFIG))
>                 return -ENODEV;
>
> Isn't that supposed to be enough to avoid an undefined reference?
>
> Making the whole file depend on VEXPRESS_CONFIG is not right either.
> Not all platforms need it.

Specifically, these defconfigs will break as they all use PL111 but
don't need nor enable VEXPRESS_CONFIG:

arch/arm/configs/integrator_defconfig:CONFIG_DRM_PL111=y
arch/arm/configs/lpc18xx_defconfig:CONFIG_DRM_PL111=y
arch/arm/configs/lpc32xx_defconfig:CONFIG_DRM_PL111=y
arch/arm/configs/nhk8815_defconfig:CONFIG_DRM_PL111=y
arch/arm/configs/realview_defconfig:CONFIG_DRM_PL111=y
arch/arm/configs/spear3xx_defconfig:CONFIG_DRM_PL111=y
arch/arm/configs/versatile_defconfig:CONFIG_DRM_PL111=y

These defconfigs should all be failing with the same error, but don't
from what I've tried nor have I seen any kernelci failures.

Rob

WARNING: multiple messages have this Message-ID
From: Rob Herring <robh@kernel.org>
To: Kees Cook <keescook@chromium.org>
Cc: Arnd Bergmann <arnd@kernel.org>,
	Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	Emma Anholt <emma@anholt.net>, David Airlie <airlied@linux.ie>,
	Sam Ravnborg <sam@ravnborg.org>,
	linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
	linux-arm-msm@vger.kernel.org, Dave Airlie <airlied@redhat.com>,
	freedreno@lists.freedesktop.org, Sean Paul <sean@poorly.run>,
	kernel test robot <lkp@intel.com>
Subject: Re: [PATCH 3/3] drm/pl111: depend on CONFIG_VEXPRESS_CONFIG
Date: Thu, 3 Jun 2021 14:54:03 -0500	[thread overview]
Message-ID: <CAL_JsqLF6WhsoSWtxVUqUPDRMM8qwGwZqWa_xtNqsVyq8OCz6w@mail.gmail.com> (raw)
In-Reply-To: <CAL_JsqLO_YbT3VU0+uHH2t6ONs_dWfBhqds9okYD0254ZiBf=A@mail.gmail.com>

On Thu, Jun 3, 2021 at 1:42 PM Rob Herring <robh@kernel.org> wrote:
>
> On Wed, Jun 2, 2021 at 4:53 PM Kees Cook <keescook@chromium.org> wrote:
> >
> > Avoid randconfig build failures by requiring VEXPRESS_CONFIG:
> >
> > aarch64-linux-gnu-ld: drivers/gpu/drm/pl111/pl111_versatile.o: in function `pl111_vexpress_clcd_init':
> > pl111_versatile.c:(.text+0x220): undefined reference to `devm_regmap_init_vexpress_config'
>
> pl111_vexpress_clcd_init() starts with:
>
> if (!IS_ENABLED(CONFIG_VEXPRESS_CONFIG))
>                 return -ENODEV;
>
> Isn't that supposed to be enough to avoid an undefined reference?
>
> Making the whole file depend on VEXPRESS_CONFIG is not right either.
> Not all platforms need it.

Specifically, these defconfigs will break as they all use PL111 but
don't need nor enable VEXPRESS_CONFIG:

arch/arm/configs/integrator_defconfig:CONFIG_DRM_PL111=y
arch/arm/configs/lpc18xx_defconfig:CONFIG_DRM_PL111=y
arch/arm/configs/lpc32xx_defconfig:CONFIG_DRM_PL111=y
arch/arm/configs/nhk8815_defconfig:CONFIG_DRM_PL111=y
arch/arm/configs/realview_defconfig:CONFIG_DRM_PL111=y
arch/arm/configs/spear3xx_defconfig:CONFIG_DRM_PL111=y
arch/arm/configs/versatile_defconfig:CONFIG_DRM_PL111=y

These defconfigs should all be failing with the same error, but don't
from what I've tried nor have I seen any kernelci failures.

Rob

  parent reply	other threads:[~2021-06-03 19:54 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-02 21:52 [PATCH 0/3] drm: Fix randconfig link failures Kees Cook
2021-06-02 21:52 ` Kees Cook
2021-06-02 21:52 ` [PATCH 1/3] drm: Avoid circular dependencies for CONFIG_FB Kees Cook
2021-06-02 21:52   ` Kees Cook
2021-06-03  8:48   ` Daniel Vetter
2021-06-03  8:48     ` Daniel Vetter
2021-06-03 18:48     ` Rob Herring
2021-06-03 18:48       ` Rob Herring
2021-06-02 21:52 ` [PATCH 2/3] drm/msm/a6xx: add CONFIG_QCOM_LLCC dependency Kees Cook
2021-06-02 21:52   ` Kees Cook
2021-06-02 21:52 ` [PATCH 3/3] drm/pl111: depend on CONFIG_VEXPRESS_CONFIG Kees Cook
2021-06-02 21:52   ` Kees Cook
2021-06-03 18:42   ` Rob Herring
2021-06-03 18:42     ` Rob Herring
2021-06-03 19:19     ` Daniel Vetter
2021-06-03 19:19       ` Daniel Vetter
2021-06-03 21:19       ` Kees Cook
2021-06-03 21:19         ` Kees Cook
2021-06-03 21:29         ` Kees Cook
2021-06-03 21:29           ` Kees Cook
2021-06-03 21:41           ` Daniel Vetter
2021-06-03 21:41             ` Daniel Vetter
2021-06-03 21:48             ` Kees Cook
2021-06-03 21:48               ` Kees Cook
2021-06-03 19:54     ` Rob Herring [this message]
2021-06-03 19:54       ` Rob Herring

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