Re: [PATCH v2 3/4] ALSA: timer: Introduce virtual userspace-driven timers

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

Hi Ivan,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tiwai-sound/for-next]
[also build test WARNING on tiwai-sound/for-linus linus/master v6.11-rc1 next-20240729]
[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/Ivan-Orlov/ALSA-aloop-Allow-using-global-timers/20240729-171015
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git for-next
patch link:    https://lore.kernel.org/r/20240729085905.6602-4-ivan.orlov0322%40gmail.com
patch subject: [PATCH v2 3/4] ALSA: timer: Introduce virtual userspace-driven timers
config: nios2-randconfig-r113-20240730 (https://download.01.org/0day-ci/archive/20240730/202407301002.SaoBM0NA-lkp@intel.com/config)
compiler: nios2-linux-gcc (GCC) 14.1.0
reproduce: (https://download.01.org/0day-ci/archive/20240730/202407301002.SaoBM0NA-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/202407301002.SaoBM0NA-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> sound/core/timer.c:2030:1: sparse: sparse: symbol 'snd_utimer_ids' was not declared. Should it be static?
   sound/core/timer.c:230:12: sparse: sparse: context imbalance in 'check_matching_master_slave' - different lock contexts for basic block
   sound/core/timer.c:405:9: sparse: sparse: context imbalance in 'remove_slave_links' - wrong count at exit
   sound/core/timer.c:456:9: sparse: sparse: context imbalance in 'snd_timer_close_locked' - wrong count at exit
   sound/core/timer.c:492:15: sparse: sparse: context imbalance in 'snd_timer_resolution' - different lock contexts for basic block
   sound/core/timer.c:541:12: sparse: sparse: context imbalance in 'snd_timer_start1' - wrong count at exit
   sound/core/timer.c:596:12: sparse: sparse: context imbalance in 'snd_timer_start_slave' - wrong count at exit
   sound/core/timer.c:616:12: sparse: sparse: context imbalance in 'snd_timer_stop1' - wrong count at exit
   sound/core/timer.c:673:9: sparse: sparse: context imbalance in 'snd_timer_stop_slave' - wrong count at exit
   sound/core/timer.c:780:25: sparse: sparse: context imbalance in 'snd_timer_process_callbacks' - unexpected unlock
   sound/core/timer.c:798:9: sparse: sparse: context imbalance in 'snd_timer_clear_callbacks' - wrong count at exit
   sound/core/timer.c:806:13: sparse: sparse: context imbalance in 'snd_timer_work' - different lock contexts for basic block
   sound/core/timer.c:825:6: sparse: sparse: context imbalance in 'snd_timer_interrupt' - different lock contexts for basic block
   sound/core/timer.c:1049:6: sparse: sparse: context imbalance in 'snd_timer_notify' - different lock contexts for basic block
   sound/core/timer.c:1323:9: sparse: sparse: context imbalance in 'snd_timer_user_interrupt' - wrong count at exit
   sound/core/timer.c:1430:12: sparse: sparse: context imbalance in 'realloc_user_queue' - wrong count at exit
   sound/core/timer.c:1672:12: sparse: sparse: context imbalance in 'snd_timer_user_gstatus' - different lock contexts for basic block
   sound/core/timer.c:2412:9: sparse: sparse: context imbalance in 'snd_timer_user_poll' - wrong count at exit

vim +/snd_utimer_ids +2030 sound/core/timer.c

  2024	
  2025	#ifdef CONFIG_SND_UTIMER
  2026	/*
  2027	 * Since userspace-driven timers are passed to userspace, we need to have an identifier
  2028	 * which will allow us to use them (basically, the subdevice number of udriven timer).
  2029	 */
> 2030	DEFINE_IDA(snd_utimer_ids);
  2031	

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