> I was under the same impression about the module licensing tagging. I
> had read that it was suppose to be for maintainability (.i.e. source available so
> kernel gods can debug) and not to enforce ideological conformity. Now I read that
> anything not licensed under the GPL, including BSD or simply public domain source
> code, will taint my kernel and modprobe complains about non-GPL stuff including
> parport_pc which apparently did not have a license. Should I expect a Linux kernel
> KGB to show up next?
>
I think what has happened here is a little bit of a misunderstanding.
I think that the modprobe source and the kernel source just aren't in sync with the
development of the new (re DEVELOPMENTAL) MOD_LICENSE() implementation.
Weither or not the BSD-NAC is GPL compatible has already been determined, as it's in the
kernel and the lead developers have said so. I trust them, they'll get sued if they don't
look at things like that. Modprobe told me a BSD module was tainted, I assumed that ment
it was incompatible with the kernel which is GPLed. I shouldn't trust everything I read :>
The problem lies in modprobe not having it in it's list of licenses to not mark as tainted.
When I modprobe ppp_deflate, it does not fail to load, it simply warned me that my kernel
would be tainted. What does having a tainted kernel mean? It is to tell kernel
debuggers if this is a clean kernel or if anything unusual has occurred.
> Furthermore I have to agree with the previous poster. Any module could
> easily lie to MODULE_LICENSE about its licensing terms and that would not make it's
> source automatically "free" and GPLable so I am now wondering if this tainting
> mechanism is of any use at all.
>
If the purpose was to discriminate against licensing, I would agree. But since
non-compatible source is not distributed with the kernel, and the mechanism is for
debugging, what is the purpose of lying to the kernel? To confuse debuggers? No point in that.
> Just out of curiosity do all of these license tags in the modules take
> up any permanent kernel memory, especially in a heavily modularize system?
>
A grep of /proc/kcore only showed the MODULE_LICESE in this email, and the scrollback
buffer in my xterm, so I don't think so.
-- Morgan Collins [Ax0n] http://sirmorcant.morcant.org Software is something like a machine, and something like mathematics, and something like language, and something like thought, and art, and information.... but software is not in fact any of those other things.- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Mon Oct 15 2001 - 21:00:34 EST