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The ASoC Sound Card driver can be compile tested with !CONFIG_OF making 'loongson_asoc_dt_ids' unused: sound/soc/loongson/loongson_card.c:200:34: warning: unused variable 'loongson_asoc_dt_ids' [-Wunused-const-variable] As krzysztof advice, we drop of_match_ptr so the device id can also be used on ACPI. Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202307242008.xqdjgk04-lkp@intel.com Fixes: d24028606e76 ("ASoC: loongson: Add Loongson ASoC Sound Card Support") Signed-off-by: YingKun Meng <mengyingkun@loongson.cn> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20230726110516.703342-1-mengyingkun@loongson.cn Signed-off-by: Mark Brown <broonie@kernel.org>