Re: [PATCH] drm: Add support for integrated privacy screens

[kbuild test robot]

Hi Rajat,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[cannot apply to v5.4-rc4 next-20191024]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Rajat-Jain/drm-Add-support-for-integrated-privacy-screens/20191025-020550
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git f116b96685a046a89c25d4a6ba2da489145c8888
config: i386-defconfig (attached as .config)
compiler: gcc-7 (Debian 7.4.0-14) 7.4.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

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

All warnings (new ones prefixed by >>):

   In file included from include/linux/printk.h:7:0,
                    from include/linux/kernel.h:15,
                    from include/linux/list.h:9,
                    from include/linux/kobject.h:19,
                    from include/linux/of.h:17,
                    from include/linux/irqdomain.h:35,
                    from include/linux/acpi.h:13,
                    from drivers/gpu//drm/drm_privacy_screen.c:8:
   drivers/gpu//drm/drm_privacy_screen.c: In function 'drm_privacy_screen_present':
>> include/linux/kern_levels.h:5:18: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'struct device *' [-Wformat=]
    #define KERN_SOH "\001"  /* ASCII Start Of Header */
                     ^
   include/linux/kern_levels.h:12:22: note: in expansion of macro 'KERN_SOH'
    #define KERN_WARNING KERN_SOH "4" /* warning conditions */
                         ^~~~~~~~
>> include/drm/drm_print.h:290:15: note: in expansion of macro 'KERN_WARNING'
     printk##once(KERN_##level "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
                  ^~~~~
   include/drm/drm_print.h:297:2: note: in expansion of macro '_DRM_PRINTK'
     _DRM_PRINTK(, WARNING, fmt, ##__VA_ARGS__)
     ^~~~~~~~~~~
>> drivers/gpu//drm/drm_privacy_screen.c:170:3: note: in expansion of macro 'DRM_WARN'
      DRM_WARN("%s: Odd, connector ACPI node but no privacy scrn?\n",
      ^~~~~~~~
   drivers/gpu//drm/drm_privacy_screen.c:170:14: note: format string is defined here
      DRM_WARN("%s: Odd, connector ACPI node but no privacy scrn?\n",
                ~^
--
   In file included from include/linux/printk.h:7:0,
                    from include/linux/kernel.h:15,
                    from include/linux/list.h:9,
                    from include/linux/kobject.h:19,
                    from include/linux/of.h:17,
                    from include/linux/irqdomain.h:35,
                    from include/linux/acpi.h:13,
                    from drivers/gpu/drm/drm_privacy_screen.c:8:
   drivers/gpu/drm/drm_privacy_screen.c: In function 'drm_privacy_screen_present':
>> include/linux/kern_levels.h:5:18: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'struct device *' [-Wformat=]
    #define KERN_SOH "\001"  /* ASCII Start Of Header */
                     ^
   include/linux/kern_levels.h:12:22: note: in expansion of macro 'KERN_SOH'
    #define KERN_WARNING KERN_SOH "4" /* warning conditions */
                         ^~~~~~~~
>> include/drm/drm_print.h:290:15: note: in expansion of macro 'KERN_WARNING'
     printk##once(KERN_##level "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
                  ^~~~~
   include/drm/drm_print.h:297:2: note: in expansion of macro '_DRM_PRINTK'
     _DRM_PRINTK(, WARNING, fmt, ##__VA_ARGS__)
     ^~~~~~~~~~~
   drivers/gpu/drm/drm_privacy_screen.c:170:3: note: in expansion of macro 'DRM_WARN'
      DRM_WARN("%s: Odd, connector ACPI node but no privacy scrn?\n",
      ^~~~~~~~
   drivers/gpu/drm/drm_privacy_screen.c:170:14: note: format string is defined here
      DRM_WARN("%s: Odd, connector ACPI node but no privacy scrn?\n",
                ~^

vim +/KERN_WARNING +290 include/drm/drm_print.h

02c9656b2f0d69 Haneen Mohammed 2017-10-17  288  
02c9656b2f0d69 Haneen Mohammed 2017-10-17  289  #define _DRM_PRINTK(once, level, fmt, ...)				\
db87086492581c Joe Perches     2018-03-16 @290  	printk##once(KERN_##level "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
02c9656b2f0d69 Haneen Mohammed 2017-10-17  291  

:::::: The code at line 290 was first introduced by commit
:::::: db87086492581c87f768b7d17d01308153ecffc1 drm: Reduce object size of DRM_DEV_<LEVEL> uses

:::::: TO: Joe Perches <joe@xxxxxxxxxxx>
:::::: CC: Daniel Vetter <daniel.vetter@xxxxxxxx>

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