Messages in this thread | | | From | Arnd Bergmann <> | Date | Mon, 6 Dec 2021 12:01:47 +0100 | Subject | Re: ERROR: modpost: "__divsi3_table" [lib/lz4/lz4_compress.ko] undefined! |
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On Mon, Dec 6, 2021 at 11:30 AM kernel test robot <lkp@intel.com> wrote: > First bad commit (maybe != root cause): > commit: 570a82b9c36f76a5959b5e47900629b0d413931d media: i2c: select V4L2_ASYNC where needed
Right, that is clearly unrelated.
> If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp@intel.com> > > All errors (new ones prefixed by >>, old ones prefixed by <<): > > >> ERROR: modpost: "__divsi3_table" [lib/lz4/lz4_compress.ko] undefined!
lz4 was recently updated, and apparently now does a 32-bit division. I assume this is the decompressor, as arch/mips had similar problems.
The possible fixes are:
- disable lz4 compressed kernels on xtensa - change lz4 to not perform any division - change the xtensa decompressor to include the divsi3 helper code from the main kernel, see fbf3bce45821 ("MIPS: boot/compressed/: add __ashldi3 to target for ZSTD compression")
Arnd
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