Comment # 2 on bug 1081427 from Matwey Kornilov

Related part of dmesg:

[   90.972315] btrfs: Unknown symbol raid6_2data_recov (err 0)
[   90.973387] btrfs: Unknown symbol zlib_deflateEnd (err 0)
[   90.976018] btrfs: Unknown symbol zlib_deflate (err 0)
[   90.976923] btrfs: Unknown symbol ZSTD_CStreamWorkspaceBound (err 0)
[   90.977476] btrfs: Unknown symbol raid6_datap_recov (err 0)
[   90.978328] btrfs: Unknown symbol zlib_deflate_workspacesize (err 0)
[   90.979493] btrfs: Unknown symbol ZSTD_compressStream (err 0)
[   90.981254] btrfs: Unknown symbol zlib_deflateInit2 (err 0)
[   90.983435] btrfs: Unknown symbol xor_blocks (err 0)
[   90.983645] btrfs: Unknown symbol raid6_call (err 0)
[   90.985562] btrfs: Unknown symbol ZSTD_endStream (err 0)
[   90.985966] btrfs: Unknown symbol ZSTD_initCStream (err 0)
[   90.986063] btrfs: Unknown symbol ZSTD_getParams (err 0)