linux-kernel - ld.lld: error: undefined symbol: drm_gem_fb_begin_cpu

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Date:   Tue, 23 Aug 2022 01:59:14 +0800
From:   kernel test robot <lkp@...el.com>
To:     Thomas Zimmermann <tzimmermann@...e.de>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org,
        Noralf Trønnes <noralf@...nnes.org>
Subject: ld.lld: error: undefined symbol: drm_gem_fb_begin_cpu_access

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   1c23f9e627a7b412978b4e852793c5e3c3efc555
commit: 08971eea06db3377ea1f9ff4f95a5df5f6c9aeb7 drm/mipi-dbi: Use framebuffer dma-buf helpers
date:   1 year, 1 month ago
config: x86_64-randconfig-a002-20220822 (https://download.01.org/0day-ci/archive/20220823/202208230156.Vo2ozAm4-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=08971eea06db3377ea1f9ff4f95a5df5f6c9aeb7
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 08971eea06db3377ea1f9ff4f95a5df5f6c9aeb7
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

>> ld.lld: error: undefined symbol: drm_gem_fb_begin_cpu_access
   >>> referenced by drm_mipi_dbi.c:207 (drivers/gpu/drm/drm_mipi_dbi.c:207)
   >>>               gpu/drm/drm_mipi_dbi.o:(mipi_dbi_buf_copy) in archive drivers/built-in.a
--
>> ld.lld: error: undefined symbol: drm_gem_fb_end_cpu_access
   >>> referenced by drm_mipi_dbi.c:227 (drivers/gpu/drm/drm_mipi_dbi.c:227)
   >>>               gpu/drm/drm_mipi_dbi.o:(mipi_dbi_buf_copy) in archive drivers/built-in.a

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp