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dma_memory_set() does a DMA barrier, set the address space with a constant value. The constant value filling code is not specific to DMA and can be used for AddressSpace. Extract it as a new helper: address_space_set(). Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> [lv: rebase] Signed-off-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Message-Id: <20220115203725.3834712-2-laurent@vivier.eu>