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    SubjectRe: [PATCH 6/13] maps#2: Move the page walker code to lib/
    On Wed, 11 Apr 2007 16:35:44 +1000 Nick Piggin <nickpiggin@yahoo.com.au> wrote:

    > Matt Mackall wrote:
    > > Move the page walker code to lib/
    > >
    > > This lets it get shared outside of proc/ and linked in only when
    > > needed.
    >
    > Still should go into mm/

    spose so.

    > If it had, you might have also noticed your pagetable walking code
    > is completely different from how everyone else does it, and fixed
    > that too.

    Different in what way?

    > BTW. Is it the case that unused and unexported symbols don't get
    > pruned by the linker except inside lib/?

    If they're static and unreferenced then the linker will remove them. Of
    course, usually humans remove these because they generate warnings, unless
    special-things happen. We deliberately do special-things with
    register_cpu_notifier() so the notifier-block and the handler go away if
    !CONFIG_HOTPLUG_CPU.

    If the functions are non-static then yes, I expect we end up with them in
    vmlinux. There are tricks we can play with -ffunction-sections to fix
    that, but we don't.
    -
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