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_accel_pdata with __maybe_unused to calm a compiler down: In file included from drivers/iio/accel/st_accel_i2c.c:19: drivers/iio/accel/st_accel.h:67:46: warning: ‘default_accel_pdata’ defined but not used [-Wunused-const-variable=] 67 | static const struct st_sensors_platform_data default_accel_pdata = { | ^~~~~~~~~~~~~~~~~~~ ... Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> --- drivers/iio/accel/st_accel.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/accel/st_accel.h b/drivers/iio/accel/st_accel.h index af09943f38c9..5b13e293cade 100644 --- a/drivers/iio/accel/st_accel.h +++ b/drivers/iio/accel/st_accel.h @@ -64,7 +64,7 @@ enum st_accel_type { * struct st_sensors_platform_data - default accel platform data * @drdy_int_pin: default accel DRDY is available on INT1 pin. */ -static const struct st_sensors_platform_data default_accel_pdata = { +static __maybe_unused const struct st_sensors_platform_data default_accel_pdata = { .drdy_int_pin = 1, }; -- 2.24.0