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C200, 712/80: strange sysfs issues with Linux 4.18.0-1-parisc



Hi all,

I'm experiencing some strange issues on both a C200 and a 712/80 with the current 32 bit SP kernel (4.18.0-2.parisc (4.18.10-2)). This does not happen when using the 64 bit MP kernel of the same version on a rp3440 for example.

For every module loaded I get a message similar to the following example:

C200:
```
[...]
[ 47.799100] sysfs: cannot create duplicate filename '/module/nfs/sections/.text' [ 47.887396] CPU: 0 PID: 98 Comm: modprobe Not tainted 4.18.0-2-parisc #1 Debian 4.18.10-2
[   47.984894] Backtrace:
[   48.013164]  [<1017ce2c>] show_stack+0x3c/0x50
[   48.066177]  [<107a7210>] dump_stack+0x28/0x38
[   48.119192]  [<103f900c>] sysfs_warn_dup+0x88/0xac
[   48.176329]  [<103f8b1c>] sysfs_add_file_mode_ns+0x164/0x1d0
[   48.243832]  [<103f9e70>] internal_create_group+0x11c/0x304
[   48.310277]  [<103fa0a0>] sysfs_create_group+0x48/0x60
[   48.371571]  [<1022abe8>] load_module.constprop.35+0x1f9c/0x23b8
[   48.443200]  [<1022b278>] sys_finit_module+0xd0/0x11c
[   48.503468]  [<101831dc>] syscall_exit+0x0/0x14
[...]
```

Testing with older kernel versions, this seems to start with 4.18.0-1-parisc (4.18.6-1). 4.17.0-1-parisc (4.17.8-1) is still OK.

[1] is from 2011 and describes a similar case (on s390x though) and there are also other reports on the web from earlier (e.g. [2] for Debian on amd64, though the reason there looks different to [1]) and later that describe a similar behaviour.

[1]: https://lore.kernel.org/patchwork/patch/244909/

[2]: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=605472

Did anyone with an on-disk installation notice something similar recently?

Cheers,
Frank


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