linux-kernel - ERROR: modpost: module drm_cma_helper uses symbol dma_buf_vunmap from namespace DMA

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Date:   Wed, 27 Oct 2021 18:14:01 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Linux-Next Mailing List <linux-next@...r.kernel.org>,
        dri-devel@...ts.freedesktop.org,
        open list <linux-kernel@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Thomas Zimmermann <tzimmermann@...e.de>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Andrey Konovalov <andreyknvl@...il.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Linus Walleij <linus.walleij@...aro.org>
Subject: ERROR: modpost: module drm_cma_helper uses symbol dma_buf_vunmap from
 namespace DMA_BUF, but does not import it.

Regression found on arm64 gcc-10 and gcc-11 built with defconfig
Following build warnings / errors reported on linux next 20211027.

metadata:
    git_describe: next-20211027
    git_repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
    git_short_log: ae5179317e79 (\"Add linux-next specific files for 20211027\")
    target_arch: arm64
    toolchain: gcc-11

build error :
--------------
ERROR: modpost: module drm_cma_helper uses symbol dma_buf_vunmap from
namespace DMA_BUF, but does not import it.
ERROR: modpost: module drm_cma_helper uses symbol dma_buf_vmap from
namespace DMA_BUF, but does not import it.
make[2]: *** [/builds/linux/scripts/Makefile.modpost:134:
modules-only.symvers] Error 1
make[2]: *** Deleting file 'modules-only.symvers'
make[2]: Target '__modpost' not remade because of errors.

Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>

build link:
-----------
https://builds.tuxbuild.com/205SAU159J0g6lSlRRS11o5hHyY/build.log

build config:
-------------
https://builds.tuxbuild.com/205SAU159J0g6lSlRRS11o5hHyY/config

# To install tuxmake on your system globally
# sudo pip3 install -U tuxmake
tuxmake --runtime podman --target-arch arm64 --toolchain gcc-11
--kconfig defconfig

--
Linaro LKFT
https://lkft.linaro.org