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Since multiple architectures have support for shadow stacks and we need to select support for this feature in several places in the generic code provide a generic config option that the architectures can select. Suggested-by: David Hildenbrand <david@redhat.com> Acked-by: David Hildenbrand <david@redhat.com> Reviewed-by: Deepak Gupta <debug@rivosinc.com> Reviewed-by: Rick Edgecombe <rick.p.edgecombe@intel.com> Reviewed-by: Mike Rapoport (IBM) <rppt@kernel.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Kees Cook <kees@kernel.org> Tested-by: Kees Cook <kees@kernel.org> Acked-by: Shuah Khan <skhan@linuxfoundation.org> Reviewed-by: Thiago Jung Bauermann <thiago.bauermann@linaro.org> Signed-off-by: Mark Brown <broonie@kernel.org> Link: https://lore.kernel.org/r/20241001-arm64-gcs-v13-1-222b78d87eee@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>