Re: [PATCH 2/9] Introduce atomic_dec_and_wake_up_var().

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

Hi NeilBrown,

kernel test robot noticed the following build errors:

[auto build test ERROR on trondmy-nfs/linux-next]
[also build test ERROR on gfs2/for-next device-mapper-dm/for-next linus/master v6.11-rc4 next-20240820]
[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/NeilBrown/i915-remove-wake_up-on-I915_RESET_MODESET/20240819-134414
base:   git://git.linux-nfs.org/projects/trondmy/linux-nfs.git linux-next
patch link:    https://lore.kernel.org/r/20240819053605.11706-3-neilb%40suse.de
patch subject: [PATCH 2/9] Introduce atomic_dec_and_wake_up_var().
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20240821/202408211354.SHlpNZbs-lkp@intel.com/config)
compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240821/202408211354.SHlpNZbs-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/202408211354.SHlpNZbs-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/gpu/drm/i915/i915_request.c:2277:
>> drivers/gpu/drm/i915/selftests/i915_request.c:1533:9: error: call to undeclared function 'atomic_dec_and_wakeup_var'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    1533 |         return atomic_dec_and_wakeup_var(&i915->selftest.counter);
         |                ^
   drivers/gpu/drm/i915/selftests/i915_request.c:1533:9: note: did you mean 'atomic_dec_and_wake_up_var'?
   include/linux/wait_bit.h:338:20: note: 'atomic_dec_and_wake_up_var' declared here
     338 | static inline bool atomic_dec_and_wake_up_var(atomic_t *var)
         |                    ^
   1 error generated.


vim +/atomic_dec_and_wakeup_var +1533 drivers/gpu/drm/i915/selftests/i915_request.c

  1530	
  1531	static bool wake_all(struct drm_i915_private *i915)
  1532	{
> 1533		return atomic_dec_and_wakeup_var(&i915->selftest.counter);
  1534	}
  1535	

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