Re: drivers/hwmon/gpd-fan.c:231:9: error: implicit declaration of function 'outb'

From: Cryolitia PukNgae

Date: Mon Oct 27 2025 - 22:14:15 EST


> Hi Cryolitia,
>
> On Sat, 25 Oct 2025 at 15:49, Cryolitia PukNgae <cryolitia@xxxxxxxxxxxxx> wrote:
>>> FYI, the error/warning still remains.
>>>
>>> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>>> head: 266ee584e55eed108583ab4f45b5de734522502d
>>> commit: 0ab88e2394392f475b8857ac82c0c987841217f8 hwmon: add GPD devices sensor driver
>>> date: 6 weeks ago
>>> config: i386-buildonly-randconfig-002-20251024 (https://download.01.org/0day-ci/archive/20251024/202510240817.vt3eQ3qL-lkp@xxxxxxxxx/config)
>>> compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
>>> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251024/202510240817.vt3eQ3qL-lkp@xxxxxxxxx/reproduce)
>>>
>>> If you fix the issue in a separate patch/commit (i.e. not just a new version of
>>> the same patch/commit), kindly add following tags
>>> | Reported-by: kernel test robot <lkp@xxxxxxxxx>
>>> | Closes: https://lore.kernel.org/oe-kbuild-all/202510240817.vt3eQ3qL-lkp@xxxxxxxxx/
>>>
>>> All errors (new ones prefixed by >>):
>>>
>>> drivers/hwmon/gpd-fan.c: In function 'gpd_ecram_read':
>>>>> drivers/hwmon/gpd-fan.c:231:9: error: implicit declaration of function 'outb' [-Wimplicit-function-declaration]
>>> 231 | outb(0x2E, addr_port);
>>> | ^~~~
>>>>> drivers/hwmon/gpd-fan.c:244:16: error: implicit declaration of function 'inb' [-Wimplicit-function-declaration]
>>> 244 | *val = inb(data_port);
>>> | ^~~
>>>
>>
>> I don't understand...... I have already added CONFIG_HAS_IOPORT to depends. If this is not enough, what else should I do?
>
> Missing #include <linux/io.h>?
>
> Gr{oetje,eeting}s,
>
> Geert
>

It has been fixed[1] a little earlier, thanks for your help

1. https://lore.kernel.org/all/20251024202042.752160-1-krishnagopi487@xxxxxxxxx/

Greetings,
Cryolitia