linux-kernel - ld: drivers/gpu/drm/bridge/sil-sii8620.c:2191: undefined reference to `extcon_register

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Date:   Mon, 9 Nov 2020 15:54:21 +0800
From:   kernel test robot <lkp@...el.com>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: ld: drivers/gpu/drm/bridge/sil-sii8620.c:2191: undefined reference
 to `extcon_register_notifier'

Hi Masahiro,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   f8394f232b1eab649ce2df5c5f15b0e528c92091
commit: def2fbffe62c00c330c7f41584a356001179c59c kconfig: allow symbols implied by y to become m
date:   8 months ago
config: i386-randconfig-r022-20201106 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=def2fbffe62c00c330c7f41584a356001179c59c
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout def2fbffe62c00c330c7f41584a356001179c59c
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

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

All errors (new ones prefixed by >>):

   ld: drivers/gpu/drm/bridge/sil-sii8620.o: in function `sii8620_remove':
   drivers/gpu/drm/bridge/sil-sii8620.c:2355: undefined reference to `extcon_unregister_notifier'
   ld: drivers/gpu/drm/bridge/sil-sii8620.o: in function `sii8620_extcon_init':
   drivers/gpu/drm/bridge/sil-sii8620.c:2179: undefined reference to `extcon_find_edev_by_node'
>> ld: drivers/gpu/drm/bridge/sil-sii8620.c:2191: undefined reference to `extcon_register_notifier'
   ld: drivers/gpu/drm/bridge/sil-sii8620.o: in function `sii8620_extcon_work':
   drivers/gpu/drm/bridge/sil-sii8620.c:2139: undefined reference to `extcon_get_state'

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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