Re: [PATCH v8 1/4] drm: Introduce device wedged event

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

Hi Raag,

kernel test robot noticed the following build errors:

[auto build test ERROR on drm-xe/drm-xe-next]
[also build test ERROR on drm-intel/for-linux-next drm-intel/for-linux-next-fixes drm-tip/drm-tip linus/master v6.12-rc4 next-20241025]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Raag-Jadav/drm-Introduce-device-wedged-event/20241025-165119
base:   https://gitlab.freedesktop.org/drm/xe/kernel.git drm-xe-next
patch link:    https://lore.kernel.org/r/20241025084817.144621-2-raag.jadav%40intel.com
patch subject: [PATCH v8 1/4] drm: Introduce device wedged event
config: arm-randconfig-002-20241026 (https://download.01.org/0day-ci/archive/20241026/202410261754.enck8cc6-lkp@intel.com/config)
compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 5886454669c3c9026f7f27eab13509dd0241f2d6)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241026/202410261754.enck8cc6-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/202410261754.enck8cc6-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/gpu/drm/drm_drv.c:36:
   In file included from include/linux/pseudo_fs.h:4:
   In file included from include/linux/fs_context.h:14:
   In file included from include/linux/security.h:33:
   In file included from include/linux/mm.h:2213:
   include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     518 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
>> drivers/gpu/drm/drm_drv.c:81:3: error: expression is not an integer constant expression
      81 |         [ffs(DRM_WEDGE_RECOVERY_REBIND) - 1]    = "rebind",
         |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/asm-generic/bitops/ffs.h:43:16: note: expanded from macro 'ffs'
      43 | #define ffs(x) generic_ffs(x)
         |                ^
   drivers/gpu/drm/drm_drv.c:82:3: error: expression is not an integer constant expression
      82 |         [ffs(DRM_WEDGE_RECOVERY_BUS_RESET) - 1] = "bus-reset",
         |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/asm-generic/bitops/ffs.h:43:16: note: expanded from macro 'ffs'
      43 | #define ffs(x) generic_ffs(x)
         |                ^
>> drivers/gpu/drm/drm_drv.c:84:15: error: invalid application of 'sizeof' to an incomplete type 'const char *const[]'
      84 | static_assert(ARRAY_SIZE(drm_wedge_recovery_opts) == ffs(DRM_WEDGE_RECOVERY_BUS_RESET));
         | ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/array_size.h:11:32: note: expanded from macro 'ARRAY_SIZE'
      11 | #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
         |                                ^
   include/linux/build_bug.h:77:50: note: expanded from macro 'static_assert'
      77 | #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr)
         |                                  ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:78:56: note: expanded from macro '__static_assert'
      78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
         |                                                        ^~~~
   drivers/gpu/drm/drm_drv.c:528:32: error: invalid application of 'sizeof' to an incomplete type 'const char *const[]'
     528 |         unsigned int len, opt, size = ARRAY_SIZE(drm_wedge_recovery_opts);
         |                                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/array_size.h:11:32: note: expanded from macro 'ARRAY_SIZE'
      11 | #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
         |                                ^~~~~
   1 warning and 4 errors generated.

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for MODVERSIONS
   Depends on [n]: MODULES [=y] && !COMPILE_TEST [=y]
   Selected by [y]:
   - RANDSTRUCT_FULL [=y] && (CC_HAS_RANDSTRUCT [=y] || GCC_PLUGINS [=n]) && MODULES [=y]


vim +81 drivers/gpu/drm/drm_drv.c

    75	
    76	/*
    77	 * Available recovery methods for wedged device. To be sent along with device
    78	 * wedged uevent.
    79	 */
    80	static const char *const drm_wedge_recovery_opts[] = {
  > 81		[ffs(DRM_WEDGE_RECOVERY_REBIND) - 1]	= "rebind",
    82		[ffs(DRM_WEDGE_RECOVERY_BUS_RESET) - 1]	= "bus-reset",
    83	};
  > 84	static_assert(ARRAY_SIZE(drm_wedge_recovery_opts) == ffs(DRM_WEDGE_RECOVERY_BUS_RESET));
    85	

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