On Fri, Nov 20, 2020 at 10:21:56AM -0600, Dan Murphy wrote: > Hello > > On 11/20/20 10:16 AM, Krzysztof Kozlowski wrote: > > The driver can match by multiple methods. Its of_device_id table is > > referenced via of_match_ptr() so it will be unused for !CONFIG_OF > > builds: > > > > sound/soc/codecs/tas2562.c:805:34: warning: ‘tas2562_of_match’ defined but not used [-Wunused-const-variable=] > > > > Signed-off-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx> > > --- > > sound/soc/codecs/tas2562.c | 2 ++ > > 1 file changed, 2 insertions(+) > > > > diff --git a/sound/soc/codecs/tas2562.c b/sound/soc/codecs/tas2562.c > > index f1ff204e3ad0..19965fabe949 100644 > > --- a/sound/soc/codecs/tas2562.c > > +++ b/sound/soc/codecs/tas2562.c > > @@ -802,6 +802,7 @@ static const struct i2c_device_id tas2562_id[] = { > > }; > > MODULE_DEVICE_TABLE(i2c, tas2562_id); > > +#ifdef CONFIG_OF > > Should we use #if IS_ENABLED(CONFIG_OF) ? I think it does not matter: 1. OF is only bool, 2. This is the existing pattern in many driver (for OF and ACPI), see also: Documentation/firmware-guide/acpi/enumeration.rst 3. ifdef should be faster for preprocessor (less macros to unwind), It would matter if OF became a module option. In such case anyway a lot of existing ifdef CONFIG_OF would have to be corrected. Best regards, Krzysztof