Hi Lubomir,

I love your patch! Yet something to improve:

[auto build test ERROR on sof-driver-fuweitax/master]
[also build test ERROR on v4.18-rc5 next-20180720]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Lubomir-Rintel/x86-czc-tablet-add-driver-that-fixes-the-buttons-on-CZC-P10T-tablet/20180722-064855
base:   https://github.com/fuweitax/linux master
config: x86_64-randconfig-s5-07222103 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   drivers/platform/x86/czc-tablet.c: In function 'czc_tablet_init':
>> drivers/platform/x86/czc-tablet.c:64:2: error: implicit declaration of function 'outb' [-Werror=implicit-function-declaration]
     outb(CZC_EC_ANDROID_KEYS, CZC_EC_EXTRA_PORT);
     ^~~~
   Cyclomatic Complexity 1 drivers/platform/x86/czc-tablet.c:czc_tablet_exit
   Cyclomatic Complexity 3 drivers/platform/x86/czc-tablet.c:czc_tablet_init
   Cyclomatic Complexity 1 drivers/platform/x86/czc-tablet.c:_GLOBAL__sub_D_65535_0_czc_tablet.c
   Cyclomatic Complexity 1 drivers/platform/x86/czc-tablet.c:_GLOBAL__sub_I_65535_1_czc_tablet.c
   cc1: some warnings being treated as errors

vim +/outb +64 drivers/platform/x86/czc-tablet.c

    58	
    59	static int __init czc_tablet_init(void)
    60	{
    61		if (!force && !dmi_check_system(czc_tablet_table))
    62			return -ENODEV;
    63	
  > 64		outb(CZC_EC_ANDROID_KEYS, CZC_EC_EXTRA_PORT);
    65	
    66		return 0;
    67	}
    68	

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