On Wed, Nov 17, 2021 at 02:07:37PM +0000, Mark Rutland wrote:
> Now that open-coded stack unwinds have been converted to
> arch_stack_walk(), we no longer need to expose any of unwind_frame(),
> walk_stackframe(), or start_backtrace() outside of stacktrace.c.

Reviewed-by: Mark Brown <broonie@kernel.org>