[PATCH v2 5/9] arm64: Make __get_wchan() use arch_stack_walk()

[Mark Brown]

On Mon, Nov 29, 2021 at 02:28:45PM +0000, Mark Rutland wrote:
> From: "Madhavan T. Venkataraman" <madvenka at linux.microsoft.com>
> 
> To enable RELIABLE_STACKTRACE and LIVEPATCH on arm64, we need to
> substantially rework arm64's unwinding code. As part of this, we want to
> minimize the set of unwind interfaces we expose, and avoid open-coding
> of unwind logic outside of stacktrace.c.

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