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    SubjectRe: [openib-general] Re: [PATCH][RFC/v1][4/12] Add InfiniBand SA (Subnet Administration) query support
    On Tue, 23 Nov 2004, Greg KH wrote:

    > On Tue, Nov 23, 2004 at 09:52:46AM -0800, Johannes Erdfelt wrote:
    >> On Mon, Nov 22, 2004, Greg KH <> wrote:
    >>> To be straightforward, either drop the RCU code completely, or change
    >>> the license of your code.
    >> Or compile against non-GPL RCU code, right?
    > No. RCU is covered by a patent that only allows for it to be
    > implemented in GPL licensed code. If you want to use RCU in non-GPL
    > code, you need to sign a license agreement with the holder of the RCU
    > patent.
    > This was all covered a few years ago when the RCU code first went into
    > the kernel tree. See the lkml archives for details.
    > So the very usage of RCU in the code is the issue here, not the fact
    > that it is being linked against a GPL licensed header file.
    > This isn't a GPL interpretation here, but a patent license agreement
    > issue. Sorry for not being clearer the first time around, I thought
    > everyone was aware of this issue by now.
    > thanks,

    Not! RCU was implemented by MIT in 1975 under a grant from NASA.
    A subsequent patent by Sequent is likely invalid because of prior
    art. Further, IBM purchased Sequent, not SCO.

    Remember, regardless of how many times a lie is repeated, it
    never becomes true.

    Dick Johnson
    Penguin : Linux version 2.6.9 on an i686 machine (5537.79 BogoMips).
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