hostaudio_kern.c:undefined reference to `unregister_sound_mixer'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   190bf7b14b0cf3df19c059061be032bd8994a597
commit: 0bbadafdc49d11a1836e5946f517d18cceaea6c8 um: allow disabling NO_IOMEM
date:   2 years, 2 months ago
config: um-randconfig-r025-20230812 (https://download.01.org/0day-ci/archive/20230812/202308121029.peTEFwvG-lkp@xxxxxxxxx/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce: (https://download.01.org/0day-ci/archive/20230812/202308121029.peTEFwvG-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202308121029.peTEFwvG-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

   ld: warning: net/bpfilter/bpfilter_umh_blob.o: missing .note.GNU-stack section implies executable stack
   ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
   /usr/bin/ld: warning: net/bpfilter/bpfilter_umh_blob.o: missing .note.GNU-stack section implies executable stack
   /usr/bin/ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
   /usr/bin/ld: warning: .tmp_vmlinux.kallsyms1 has a LOAD segment with RWX permissions
   /usr/bin/ld: arch/um/drivers/hostaudio_kern.o: in function `hostaudio_cleanup_module':
>> hostaudio_kern.c:(.exit.text+0x1c): undefined reference to `unregister_sound_mixer'
>> /usr/bin/ld: hostaudio_kern.c:(.exit.text+0x2b): undefined reference to `unregister_sound_dsp'
   /usr/bin/ld: arch/um/drivers/hostaudio_kern.o: in function `hostaudio_init_module':
>> hostaudio_kern.c:(.init.text+0xb1): undefined reference to `register_sound_dsp'
>> /usr/bin/ld: hostaudio_kern.c:(.init.text+0x11f): undefined reference to `register_sound_mixer'
>> /usr/bin/ld: hostaudio_kern.c:(.init.text+0x186): undefined reference to `unregister_sound_dsp'
   collect2: error: ld returned 1 exit status

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for LOCKDEP
   Depends on [n]: DEBUG_KERNEL [=y] && LOCK_DEBUGGING_SUPPORT [=y] && (FRAME_POINTER [=n] || MIPS || PPC || S390 || MICROBLAZE || ARM || ARC || X86)
   Selected by [y]:
   - DEBUG_LOCK_ALLOC [=y] && DEBUG_KERNEL [=y] && LOCK_DEBUGGING_SUPPORT [=y]

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