Re: [PATCH] ACPI / fan: Properly handle fine grain control

[kernel test robot]

Hi Srinivas,

I love your patch! Yet something to improve:

[auto build test ERROR on rafael-pm/linux-next]
[also build test ERROR on linux/master linus/master v5.16 next-20220114]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Srinivas-Pandruvada/ACPI-fan-Properly-handle-fine-grain-control/20220114-064818
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: i386-randconfig-a003 (https://download.01.org/0day-ci/archive/20220114/202201141519.esDIoL2I-lkp@xxxxxxxxx/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/f30ef71d0435cd8735ee418eeb0bfc71a58a4554
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Srinivas-Pandruvada/ACPI-fan-Properly-handle-fine-grain-control/20220114-064818
        git checkout f30ef71d0435cd8735ee418eeb0bfc71a58a4554
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

   ld: drivers/acpi/fan.o: in function `fan_get_max_state':
>> drivers/acpi/fan.c:100: undefined reference to `__udivdi3'
   ld: drivers/acpi/fan.o: in function `fan_set_state_acpi4':
   drivers/acpi/fan.c:222: undefined reference to `__udivdi3'
   ld: drivers/acpi/fan.o: in function `fan_get_state_acpi4':
   drivers/acpi/fan.c:160: undefined reference to `__udivdi3'


vim +100 drivers/acpi/fan.c

    91	
    92	/* thermal cooling device callbacks */
    93	static int fan_get_max_state(struct thermal_cooling_device *cdev, unsigned long
    94				     *state)
    95	{
    96		struct acpi_device *device = cdev->devdata;
    97		struct acpi_fan *fan = acpi_driver_data(device);
    98	
    99		if (fan->fif.fine_grain_ctrl)
 > 100			*state = 100 / fan->fif.step_size;
   101		else if (fan->acpi4)
   102			*state = fan->fps_count - 1;
   103		else
   104			*state = 1;
   105	
   106		return 0;
   107	}
   108	

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