arm64: stacktrace: rename unwinder functions
Rename unwinder functions for consistency and better naming. - Rename start_backtrace() to unwind_init(). - Rename unwind_frame() to unwind_next(). - Rename walk_stackframe() to unwind(). There should be no functional change as a result of this patch. Signed-off-by: Madhavan T. Venkataraman <madvenka@linux.microsoft.com> Reviewed-by: Mark Brown <broonie@kernel.org> Signed-off-by: Mark Rutland <mark.rutland@arm.com> Reviewed-by: Kalesh Singh <kaleshsingh@google.com> for the series. Link: https://lore.kernel.org/r/20220413145910.3060139-5-mark.rutland@arm.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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