Since we put static variable to a header file it's copied to each module that includes the header. But not all of them are actually used it. Mark default_press_pdata with __maybe_unused to calm a compiler down: In file included from drivers/iio/pressure/st_pressure_spi.c:18: drivers/iio/pressure/st_pressure.h:40:46: warning: ‘default_press_pdata’ defined but not used [-Wunused-const-variable=] 40 | static const struct st_sensors_platform_data default_press_pdata = { | ^~~~~~~~~~~~~~~~~~~ ... Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> --- drivers/iio/pressure/st_pressure.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/pressure/st_pressure.h b/drivers/iio/pressure/st_pressure.h index c2e47a6c3118..5c746ff6087e 100644 --- a/drivers/iio/pressure/st_pressure.h +++ b/drivers/iio/pressure/st_pressure.h @@ -37,7 +37,7 @@ enum st_press_type { * struct st_sensors_platform_data - default press platform data * @drdy_int_pin: default press DRDY is available on INT1 pin. */ -static const struct st_sensors_platform_data default_press_pdata = { +static __maybe_unused const struct st_sensors_platform_data default_press_pdata = { .drdy_int_pin = 1, }; -- 2.24.0