[asahilinux:bits/200-dcp 206/210] drivers/gpu/drm/apple/av.c:300:22: warning: variable 'dev_link' set but not used

[kernel test robot <lkp@intel.com>]

tree:   https://github.com/AsahiLinux/linux bits/200-dcp
head:   38ae67fe4628d642a9dc626b9ba75bb2ac4bd701
commit: 53bd36e4e44587ff94d2b9fd00bbc8ad47ecad5a [206/210] drm: apple: audio: Make the DP/HDMI audio driver a full driver
config: arm64-allyesconfig (https://download.01.org/0day-ci/archive/20240504/202405041856.17BImNr8-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 37ae4ad0eef338776c7e2cffb3896153d43dcd90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240504/202405041856.17BImNr8-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202405041856.17BImNr8-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/gpu/drm/apple/av.c:15:
   In file included from drivers/gpu/drm/apple/afk.h:14:
   In file included from drivers/gpu/drm/apple/dcp.h:7:
   In file included from include/drm/drm_atomic.h:31:
   In file included from include/drm/drm_crtc.h:32:
   In file included from include/drm/drm_modes.h:33:
   In file included from include/drm/drm_connector.h:32:
   In file included from include/drm/drm_util.h:36:
   In file included from include/linux/kgdb.h:19:
   In file included from include/linux/kprobes.h:28:
   In file included from include/linux/ftrace.h:13:
   In file included from include/linux/kallsyms.h:13:
   In file included from include/linux/mm.h:2188:
   include/linux/vmstat.h:508:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     508 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     509 |                            item];
         |                            ~~~~
   include/linux/vmstat.h:515:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     515 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     516 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     522 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   include/linux/vmstat.h:527:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     527 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     528 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:536:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     536 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     537 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/apple/av.c:300:22: warning: variable 'dev_link' set but not used [-Wunused-but-set-variable]
     300 |         struct device_link *dev_link;
         |                             ^
   6 warnings generated.


vim +/dev_link +300 drivers/gpu/drm/apple/av.c

   293	
   294	int avep_init(struct apple_dcp *dcp)
   295	{
   296		struct audiosrv_data *audiosrv_data;
   297		struct platform_device *audio_pdev;
   298		struct device *dev = dcp->dev;
   299		struct device_node *endpoint, *audio_node = NULL;
 > 300		struct device_link *dev_link;

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