[PATCH] arm64/gcs: Fix error handling in arch_set_shadow_stack_status()

[Mark Brown]

On Fri, Jan 30, 2026 at 01:43:09AM -0800, Breno Leitao wrote:
> alloc_gcs() returns an error-encoded pointer on failure, which comes
> from do_mmap(), not NULL.

Good spot, thanks:

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

> PS: This was compiled-tested only, given I unfortunately don't have
> a hardware to test on _yet_.

You can run with the Arm software models, shrinkwrap provides a
convenient way to do that:

  https://shrinkwrap.docs.arm.com/en/latest/

or the very latest qemu.
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