[PATCH 5/5] ALSA: control - add sysfs support to the LED trigger module

[kernel test robot]

Hi Jaroslav,

I love your patch! Perhaps something to improve:

[auto build test WARNING on sound/for-next]
[also build test WARNING on v5.11-rc7 next-20210125]
[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/Jaroslav-Kysela/ALSA-control-add-generic-LED-trigger-code/20210211-192035
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git for-next
config: m68k-allmodconfig (attached as .config)
compiler: m68k-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
        # https://github.com/0day-ci/linux/commit/050a577337d6c36f0ff05c450d004d7767045f20
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Jaroslav-Kysela/ALSA-control-add-generic-LED-trigger-code/20210211-192035
        git checkout 050a577337d6c36f0ff05c450d004d7767045f20
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=m68k 

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 >>):

>> sound/core/control_led.c:78:21: warning: no previous prototype for 'snd_ctl_led_get_by_access' [-Wmissing-prototypes]
      78 | struct snd_ctl_led *snd_ctl_led_get_by_access(unsigned int access)
         |                     ^~~~~~~~~~~~~~~~~~~~~~~~~
   sound/core/control_led.c:271:6: warning: no previous prototype for 'snd_ctl_led_hello' [-Wmissing-prototypes]
     271 | void snd_ctl_led_hello(void)
         |      ^~~~~~~~~~~~~~~~~


vim +/snd_ctl_led_get_by_access +78 sound/core/control_led.c

    77	
  > 78	struct snd_ctl_led *snd_ctl_led_get_by_access(unsigned int access)
    79	{
    80		unsigned int group = access_to_group(access);
    81		if (group >= MAX_LED)
    82			return NULL;
    83		return &snd_ctl_leds[group];
    84	}
    85	

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