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From:   Naresh Kamboju <naresh.kamboju@linaro.org>
Date:   Mon, 25 Oct 2021 19:31:17 +0530
Message-ID: <CA+G9fYvdhk-H8wBDdaPmRMZS_egxndncUkbZ92HCnUFD1g_wSQ@mail.gmail.com>
Subject: Re: gpu: drm_fb_cma_helper.c:46: undefined reference to `drm_gem_fb_get_obj'
To:     dri-devel@lists.freedesktop.org,
        open list <linux-kernel@vger.kernel.org>,
        Linux-Next Mailing List <linux-next@vger.kernel.org>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        Thomas Zimmermann <tzimmermann@suse.de>
Cc:     Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Maxime Ripard <mripard@kernel.org>,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        Andrey Konovalov <andreyknvl@gmail.com>,
        Stephen Rothwell <sfr@canb.auug.org.au>,
        Arnd Bergmann <arnd@arndb.de>,
        Alexandre Belloni <alexandre.belloni@bootlin.com>,
        Linus Walleij <linus.walleij@linaro.org>,
        Daniel Vetter <daniel.vetter@ffwll.ch>
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On Mon, 25 Oct 2021 at 17:43, Naresh Kamboju <naresh.kamboju@linaro.org> wrote:
>
> Regression found on arm gcc-11 built with multi_v5_defconfig
> Following build warnings / errors reported on linux next 20211025.
>
> metadata:
>     git_describe: next-20211025
>     git_repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
>     git_short_log: 9ae1fbdeabd3 (\"Add linux-next specific files for 20211025\")
>     target_arch: arm
>     toolchain: gcc-11
>     config: multi_v5_defconfig
>
> build error :
> --------------
> arm-linux-gnueabihf-ld: drivers/gpu/drm/drm_fb_cma_helper.o: in
> function `drm_fb_cma_get_gem_obj':
> drivers/gpu/drm/drm_fb_cma_helper.c:46: undefined reference to
> `drm_gem_fb_get_obj'
> arm-linux-gnueabihf-ld: drivers/gpu/drm/drm_fb_cma_helper.c:46:
> undefined reference to `drm_gem_fb_get_obj'
> arm-linux-gnueabihf-ld: drivers/gpu/drm/drm_fb_cma_helper.c:46:
> undefined reference to `drm_gem_fb_get_obj'
> arm-linux-gnueabihf-ld: drivers/gpu/drm/drm_fb_cma_helper.o: in
> function `drm_fb_cma_sync_non_coherent':
> drivers/gpu/drm/drm_fb_cma_helper.c:133: undefined reference to
> `drm_atomic_helper_damage_iter_init'
> arm-linux-gnueabihf-ld: drivers/gpu/drm/drm_fb_cma_helper.c:135:
> undefined reference to `drm_atomic_helper_damage_iter_next'
> make[1]: *** [Makefile:1252: vmlinux] Error 1
> make[1]: Target '__all' not remade because of errors.
> make: *** [Makefile:226: __sub-make] Error 2
>
> Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>

The bisection script pointed to the first bad commit,

commit 4b2b5e142ff499a2bef2b8db0272bbda1088a3fe
drm: Move GEM memory managers into modules

> build link:
> -----------
> https://builds.tuxbuild.com/1zzgFZBGjpQ5R0lawQFW9iJ39Hp/build.log
>
> build config:
> -------------
> https://builds.tuxbuild.com/1zzgFZBGjpQ5R0lawQFW9iJ39Hp/config
>
> # To install tuxmake on your system globally
> # sudo pip3 install -U tuxmake
> tuxmake --runtime podman --target-arch arm --toolchain gcc-11
> --kconfig multi_v5_defconfig
>
> --
> Linaro LKFT
> https://lkft.linaro.org

- Naresh