[android-common:android14-6.1 2/2] drivers/dma-buf/heaps/page_pool.c:235:17: sparse: sparse: symbol 'pool_shrinker' was not declared. Should it be static?

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

Hi Hridya,

First bad commit (maybe != root cause):

tree:   https://android.googlesource.com/kernel/common android14-6.1
head:   e7e4a657fff86db1dc8f902e5ff8c713b81f6d39
commit: 70ad75e771d15cdf21f43548ee47bb38b4c2f564 [2/2] ANDROID: dma-heap: Make the page-pool library built-in
config: arm-randconfig-r2308-20261027 (https://download.01.org/0day-ci/archive/20261027/202610270749.TnClUGgT-lkp@intel.com/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 42d4451d86c175b745d6ea1c4081787994c7259b)
sparse: v0.6.5-rc1-1-gc4640450
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261027/202610270749.TnClUGgT-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/202610270749.TnClUGgT-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/dma-buf/heaps/page_pool.c:235:17: sparse: sparse: symbol 'pool_shrinker' was not declared. Should it be static?
   drivers/dma-buf/heaps/page_pool.c:242:5: sparse: sparse: symbol 'dmabuf_page_pool_init_shrinker' was not declared. Should it be static?

vim +/pool_shrinker +235 drivers/dma-buf/heaps/page_pool.c

d3b59a75e86384 John Stultz 2020-10-02  234  
d3b59a75e86384 John Stultz 2020-10-02 @235  struct shrinker pool_shrinker = {
d3b59a75e86384 John Stultz 2020-10-02  236  	.count_objects = dmabuf_page_pool_shrink_count,
d3b59a75e86384 John Stultz 2020-10-02  237  	.scan_objects = dmabuf_page_pool_shrink_scan,
d3b59a75e86384 John Stultz 2020-10-02  238  	.seeks = DEFAULT_SEEKS,
d3b59a75e86384 John Stultz 2020-10-02  239  	.batch = 0,
d3b59a75e86384 John Stultz 2020-10-02  240  };
d3b59a75e86384 John Stultz 2020-10-02  241  

:::::: The code at line 235 was first introduced by commit
:::::: d3b59a75e86384b6d5302159fa89446ead81e71e ANDROID: dma-buf: heaps: Add a shrinker controlled page pool

:::::: TO: John Stultz <john.stultz@linaro.org>
:::::: CC: Greg Kroah-Hartman <gregkh@google.com>

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