[PATCH v5 13/13] drm/print: Add tracefs support to the drm logging helpers

[kernel test robot]

Hi Sean,

I love your patch! Perhaps something to improve:

[auto build test WARNING on drm-intel/for-linux-next]
[also build test WARNING on drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next drm-tip/drm-tip linus/master v5.7]
[cannot apply to drm/drm-next]
[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/Sean-Paul/drm-trace-Mirror-DRM-debug-logs-to-tracefs/20200609-050750
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: riscv-allyesconfig (attached as .config)
compiler: riscv64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp at intel.com>

All warnings (new ones prefixed by >>, old ones prefixed by <<):

drivers/gpu/drm/drm_print.c: In function 'drm_trace_init':
>> drivers/gpu/drm/drm_print.c:459:6: warning: old-style function definition [-Wold-style-definition]
459 | void drm_trace_init()
|      ^~~~~~~~~~~~~~
drivers/gpu/drm/drm_print.c: In function 'drm_trace_cleanup':
drivers/gpu/drm/drm_print.c:492:6: warning: old-style function definition [-Wold-style-definition]
492 | void drm_trace_cleanup()
|      ^~~~~~~~~~~~~~~~~

vim +459 drivers/gpu/drm/drm_print.c

   452	
   453	/**
   454	 * drm_trace_init - initializes the drm trace array
   455	 *
   456	 * This function fetches (or creates) the drm trace array. This should be called
   457	 * once on drm subsystem creation and matched with drm_trace_cleanup().
   458	 */
 > 459	void drm_trace_init()
   460	{
   461		trace_arr = trace_array_get_by_name("drm");
   462		if (!trace_arr)
   463			return;
   464	}
   465	EXPORT_SYMBOL(drm_trace_init);
   466	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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