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    SubjectRe: [RFC 0/4] arm64: add livepatch support
    On Fri, 24 Apr 2015, AKASHI Takahiro wrote:

    > This patchset enables livepatch support on arm64.
    >
    > Livepatch was merged in v4.0, and allows replacying a function dynamically
    > based on ftrace framework, but it also requires -mfentry option of gcc.
    > Currently arm64 gcc doesn't support it, but by adding a helper function to
    > ftrace, we will be able to support livepatch on arch's which don't support
    > this option.
    >
    > I submit this patchset as RFC since I'm not quite sure that I'm doing
    > in the right way, or we should definitely support -fentry instead.

    I don't have arm64 cross-compiler handy, could you please copy/paste how
    does function prologue, generated by gcc -pg on arm64 look like?

    Thanks,

    --
    Jiri Kosina
    SUSE Labs


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