[ammarfaizi2-block:google/android/kernel/common/android12-5.4 4036/9999] drivers/dma-buf/heaps/deferred-free-helper.c:23:19: sparse: sparse: symbol 'freelist_waitqueue' was not declared. Should it be static?

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

tree:   https://github.com/ammarfaizi2/linux-block google/android/kernel/common/android12-5.4
head:   c79b9571f583dcad873b5296417a6a8ddbbfe0dd
commit: e3919bfeb0066ab9b5f9765e5610b95672990e64 [4036/9999] ANDROID: dma-buf: system_heap: Add deferred freeing to the system heap
config: x86_64-randconfig-s022-20220221 (https://download.01.org/0day-ci/archive/20220222/202202222242.FAlsGVrw-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.4-dirty
        # https://github.com/ammarfaizi2/linux-block/commit/e3919bfeb0066ab9b5f9765e5610b95672990e64
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block google/android/kernel/common/android12-5.4
        git checkout e3919bfeb0066ab9b5f9765e5610b95672990e64
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/dma-buf/heaps/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


sparse warnings: (new ones prefixed by >>)
>> drivers/dma-buf/heaps/deferred-free-helper.c:23:19: sparse: sparse: symbol 'freelist_waitqueue' was not declared. Should it be static?
>> drivers/dma-buf/heaps/deferred-free-helper.c:24:20: sparse: sparse: symbol 'freelist_task' was not declared. Should it be static?

vim +/freelist_waitqueue +23 drivers/dma-buf/heaps/deferred-free-helper.c

bd1639945c30298 John Stultz 2020-12-09  20  
bd1639945c30298 John Stultz 2020-12-09  21  static LIST_HEAD(free_list);
bd1639945c30298 John Stultz 2020-12-09  22  static size_t list_nr_pages;
bd1639945c30298 John Stultz 2020-12-09 @23  wait_queue_head_t freelist_waitqueue;
bd1639945c30298 John Stultz 2020-12-09 @24  struct task_struct *freelist_task;
bd1639945c30298 John Stultz 2020-12-09  25  static DEFINE_SPINLOCK(free_list_lock);
bd1639945c30298 John Stultz 2020-12-09  26  

:::::: The code at line 23 was first introduced by commit
:::::: bd1639945c30298e4bea2b611d6b0cd08d3cdd98 ANDROID: dma-buf: heaps: Add deferred-free-helper library code

:::::: TO: John Stultz <john.stultz@linaro.org>
:::::: CC: John Stultz <john.stultz@linaro.org>

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