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    SubjectRe: [PATCH 4/4] KBUILD: export-symbol usage report generator
    On Thu, May 11, 2006 at 01:43:27PM +0200, Andi Kleen wrote:
    > (Ram Pai) writes:
    > > From: Ram Pai <>
    > >
    > > The following patch provides the ability to generate a report of
    > > (1) All the exported symbols and their in-kernel-module usage count
    > > (2) For each module, lists the modules and their exported symbols, on
    > > which it depends.
    > Very nice.
    > One thing I always wanted to see was a more focussed EXPORT_SYMBOL.
    > A lot of symbols are only exported for a single other module (e.g. most
    > of the networking exports are for IPv6) but are actually internal
    > and shouldn't be messed with by other modules. It would be nice
    > if name spaces could be defined that say "this export is only for
    > modules in this name space" and then e.g. have IPv6 be in the TCPINTERNALS
    > name space and nobody else.
    > I think adding something like this could clean up the bewildering
    > jungle of exports greatly.
    > _GPL is kind of like that already, but it is not fine grained enough.

    I'd go even further and say every symbol should have a category. These
    catgories than could get labels such as mostly stable, public but volatile
    or internal (the latter is what's oddly named _GPL) now. That way a small
    look at a driver can say if it's doing something wrong, e.g. if a network
    driver imports symbols from anything but BASE, PCI and NETDEV something
    is most likely wrong.
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