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Re: [GNU-linux-libre] The "Free" Kernel In Debian Squeeze

From: Alexandre Oliva
Subject: Re: [GNU-linux-libre] The "Free" Kernel In Debian Squeeze
Date: Fri, 14 Jan 2011 06:05:04 -0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux)

On Jan 13, 2011, Richard Stallman <address@hidden> wrote:

>> We compute the hash of "`uname -r`/foobar/blobname.fw", and ask the
>> userland hotplug script for %x of that hash number.

>> This does not depend on any session ID.  It will only change if you
>> install a different version of Linux.

>     Yeah, this particular variant doesn't.

>     Other variants, using a kernel-supplied varying hash prefix (which could
>     be exposed through some file named hashprefix within /sys) could.

> What I don't understand is why you entertain the idea of doing so.  It
> would be like our current approach in that it would be impossible to
> put firmware in a file that would load.

No, it wouldn't be impossible.  A suitable userland hotplug script would
be perfectly capable of looking for a local file that satisfies the

What this would do is make it harder for the hashes to become stable
alternate identifiers for the blobs.

Alexandre Oliva, freedom fighter
You must be the change you wish to see in the world. -- Gandhi
Be Free! --   FSF Latin America board member
Free Software Evangelist      Red Hat Brazil Compiler Engineer

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