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    SubjectRe: Why is Nvidia given GPL'd code to use in closed source drivers?
    On Wed, 1 Jan 2003, Rik van Riel wrote:

    > Copyright law is pretty explicit about the situations the GPL
    > applies to. If something can be reasonably considered to be a
    > "derivative work" of a GPL work, the GPL applies and the new work
    > needs to be GPL.


    > but only a song. If nvidia's driver only uses some simple
    > declarations from include files and no large (>7 lines? >10lines?
    > what's large?) inline functions AND the nvidia driver uses only the
    > standard interfaces to hook into the Linux kernel, then it's not a
    > derivative work and nvidia gets to choose the license.

    It has long been held that linking to GPL code is suffient to
    consitute 'derived work' status, hence the existence of the LGPL.

    The NVidia shim makes use of several kernel subsystems, the PCI
    device layer, the VM, the module system (well really, the kernel
    makes of use of the functions the module provides :) ), IRQ
    subsystem, the VFS, etc.. These systems are rather large bodies of
    code - without which the NVidia kernel driver could not work.

    So I am not quite sure on what basis one could argue the NVidia
    driver is not a derivative work, and hence it seems to me the NVidia
    driver is technically in material breach of GPL.

    You seem to be basing your opinion on:

    "the nvidia driver uses only the standard interfaces to hook into
    the Linux kernel"

    How are the standard interfaces not covered by the GPL?

    I know Linus' has often posted to l-k that he doesnt care about
    binary only modules as long as they stick to the exported interfaces.
    However, are all the kernel developers agreed on this? And if so, can
    this exception be formalised and put into the COPYING file? If not,
    then is NVidia not in breach of the kernel's licence?

    > Rik

    Paul Jakma Key ID: 64A2FF6A
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