On Fri, 24 Oct 2025 16:29:07 +0200
Jens Remus [off-list ref] wrote:

@Steven: Any idea why you added pt_regs?  Your v9 even had this other
instance of unused pt_regs:

+static struct unwind_user_frame *get_fp_frame(struct pt_regs *regs)
+{
+	return &fp_frame;
+}

According to the history:

  https://lore.kernel.org/linux-trace-kernel/20250717012848.927473176@kernel.org/ (local)

Which has:

  Changes since v8: https://lore.kernel.org/linux-trace-kernel/20250708021115.894007410@kernel.org/ (local)

  - Rebased on the changes by Mathieu in the kernel/unwind/user.c file
    https://lore.kernel.org/all/20250710164301.3094-2-mathieu.desnoyers@efficios.com/ (local)

It looks like it came in from Mathieu's updates, which was trying to deal
with compat. But then after noticing that compat wasn't working on my tests
boxes, I removed it. The removal failed to notice that regs is now unused.

-- Steve