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

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Date:   Wed, 27 Oct 2021 15:13:38 +0000
From:   Marcel Ziswiler <marcel.ziswiler@...adex.com>
To:     "naresh.kamboju@...aro.org" <naresh.kamboju@...aro.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-next@...r.kernel.org" <linux-next@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "tzimmermann@...e.de" <tzimmermann@...e.de>
CC:     "airlied@...ux.ie" <airlied@...ux.ie>,
        "sfr@...b.auug.org.au" <sfr@...b.auug.org.au>,
        "andreyknvl@...il.com" <andreyknvl@...il.com>,
        "linus.walleij@...aro.org" <linus.walleij@...aro.org>,
        "arnd@...db.de" <arnd@...db.de>,
        "maarten.lankhorst@...ux.intel.com" 
        <maarten.lankhorst@...ux.intel.com>,
        "alexandre.belloni@...tlin.com" <alexandre.belloni@...tlin.com>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "mripard@...nel.org" <mripard@...nel.org>
Subject: Re: ERROR: modpost: module drm_cma_helper uses symbol dma_buf_vunmap
 from namespace DMA_BUF, but does not import it.

On Wed, 2021-10-27 at 18:14 +0530, Naresh Kamboju wrote:
> 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

I also just experienced this one and will send a fix shortly.