On 3/12/23 11:08, Krzysztof Kozlowski wrote:
On 12/03/2023 19:06, Guenter Roeck wrote:
On Sat, Mar 11, 2023 at 12:16:09PM +0100, Krzysztof Kozlowski wrote:
The driver can be compile tested with !CONFIG_OF making certain data
unused:
drivers/hwmon/gpio-fan.c:484:34: error: ‘of_gpio_fan_match’ defined but not used [-Werror=unused-const-variable=]
How do you trigger that ? The driver depends on OF_GPIO which
in turn depends on OF. Arguably that means that of_match_ptr()
doesnot really make sense, but still I don't see how you can
trigger the above error message.
I can drop of_match_ptr, it's indeed in many cases not needed.
I just build x86_64 allyesconfig minus OF, with W=1.
x86_64 allyesconfig minus OF minus results in SENSORS_GPIO_FAN being
deselected (it doesn't show up in the configuration anymore at all
after "make olddefconfig").
$ make allyesconfig
$ grep SENSORS_GPIO_FAN .config
CONFIG_SENSORS_GPIO_FAN=y
$ sed -i -e 's/CONFIG_OF=y/# CONFIG_OF is not set/' .config
$ make olddefconfig
#
# configuration written to .config
#
$ grep SENSORS_GPIO_FAN .config
$
I suspect what you did is to disable CONFIG_OF, and then you built
the driver without realizing that is was deselected.
Do you want to me to drop of_match_ptr?
Yes, sure, that makes more sense. The reason though is that the
driver depends on CONFIG_OF=y, not because of the build failure.
Thanks,
Guenter
