drivers/iio/dac/ltc2688.c:942:19: warning: symbol 'ltc2688_regmap_bus' was not declared. Should it be static? Reported-by: kernel test robot <lkp(a)intel.com&gt; Signed-off-by: kernel test robot <lkp(a)intel.com&gt; --- ltc2688.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/dac/ltc2688.c b/drivers/iio/dac/ltc2688.c index 179a653ce972a..decd6d3742d96 100644 --- a/drivers/iio/dac/ltc2688.c +++ b/drivers/iio/dac/ltc2688.c @@ -939,7 +939,7 @@ static bool ltc2688_reg_writable(struct device *dev, unsigned int reg) return false; } -struct regmap_bus ltc2688_regmap_bus = { +static struct regmap_bus ltc2688_regmap_bus = { .read = ltc2688_spi_read, .write = ltc2688_spi_write, .read_flag_mask = LTC2688_READ_OPERATION,