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    SubjectRe: [tip: x86/core] objtool: Find unused ENDBR instructions
    On Tue, Mar 15, 2022 at 03:39:52PM +0000, David Laight wrote:
    > From: Peter Zijlstra
    > >
    > > objtool: Find unused ENDBR instructions
    > >
    > > Find all ENDBR instructions which are never referenced and stick them
    > > in a section such that the kernel can poison them, sealing the
    > > functions from ever being an indirect call target.
    >
    > Thought, what happens if the only indirect call is from
    > code in a module?

    Then <boom>, I guess. Is it safe to assume in-tree modules don't need
    to do indirect calls to exported functions? I guess we'll find out :-)

    --
    Josh

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