Hi, On Thu, 7 Dec 2017 12:50:50 -0500 Sinan Kaya wrote: > On 12/7/2017 10:20 AM, Lothar Waßmann wrote: > > Hi, > > > > On Thu, 7 Dec 2017 09:45:31 -0500 Sinan Kaya wrote: > >> On 12/7/2017 8:10 AM, Lothar Waßmann wrote: > >>>> +void *of_fwnode_get_match_data(const struct fwnode_handle *fwnode, > >>>> + struct device *dev) > >>> Shouldn't this be 'const void *of_fwnode_get_match_data > >> > >> OF keeps the driver data as a (const void*) internally. ACPI keeps the > >> driver data as kernel_ulong_t in struct acpi_device_id. > >> > >> I tried to find the middle ground here by converting output to void* > >> but not keeping const. > >> > > It should be no problem to cast a (const void *) to an unsigned long > > data type (without const qualifier). > > > > It is the other way around. If I change this API to return a a (const void*), > the device_get_match_data() function need to return a (const void *). > > While implementing the ACPI piece, I have to convert an unsigned long to > (const void *) in ACPI code so that the APIs are compatible. > Just one more remark: Do you need write access to the data the pointer returned by device_get_match_data() or of_fwnode_get_match_data() points to? If not, the return type of those functions should be 'const void *'. Lothar Waßmann -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
