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    SubjectRe: [RFC PATCH v3 4/4] arm64: Handle funtion graph tracer better in the unwinder
    On Mon, May 03, 2021 at 12:36:15PM -0500, madvenka@linux.microsoft.com wrote:
    > From: "Madhavan T. Venkataraman" <madvenka@linux.microsoft.com>
    >
    > The Function Graph Tracer modifies the return address of a traced function
    > to a return trampoline (return_to_handler()) to gather tracing data on
    > function return. When the unwinder encounters return_to_handler(), it calls
    > ftrace_graph_get_ret_stack() to lookup the original return address in the
    > return address stack.

    This makes sense to me, I'll need to re-review properly with the changes
    earlier on in the series but should be fine.
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