[mmotm:master 51/95] drivers/gpu/drm/ttm/ttm_page_alloc.c:451:2: warning: ignoring return value of 'register_shrinker', declared with attribute warn_unused_result

[mmotm:master 51/95] drivers/gpu/drm/ttm/ttm_page_alloc.c:451:2: warning: ignoring return value of 'register_shrinker', declared with attribute warn_unused_result

[kbuild test robot]

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tree:   git://git.cmpxchg.org/linux-mmotm.git master
head:   f5ef1cb6700e8b570adae945b1e0bd4ab95d8a26
commit: a58c5788f373a7a45532d5b02ae3b0173d4273e7 [51/95] mm,vmscan: mark register_shrinker() as __must_check
config: i386-randconfig-i1-201747 (attached as .config)
compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026
reproduce:
        git checkout a58c5788f373a7a45532d5b02ae3b0173d4273e7
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/ttm/ttm_page_alloc.c: In function 'ttm_pool_mm_shrink_init':
>> drivers/gpu/drm/ttm/ttm_page_alloc.c:451:2: warning: ignoring return value of 'register_shrinker', declared with attribute warn_unused_result [-Wunused-result]
     register_shrinker(&manager->mm_shrink);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
   drivers/gpu/drm/ttm/ttm_page_alloc_dma.c: In function 'ttm_dma_pool_mm_shrink_init':
>> drivers/gpu/drm/ttm/ttm_page_alloc_dma.c:1185:2: warning: ignoring return value of 'register_shrinker', declared with attribute warn_unused_result [-Wunused-result]
     register_shrinker(&manager->mm_shrink);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

vim +/register_shrinker +451 drivers/gpu/drm/ttm/ttm_page_alloc.c

1403b1a3 Pauli Nieminen 2010-04-01  445  
1403b1a3 Pauli Nieminen 2010-04-01  446  static void ttm_pool_mm_shrink_init(struct ttm_pool_manager *manager)
1403b1a3 Pauli Nieminen 2010-04-01  447  {
7dc19d5a Dave Chinner   2013-08-28  448  	manager->mm_shrink.count_objects = ttm_pool_shrink_count;
7dc19d5a Dave Chinner   2013-08-28  449  	manager->mm_shrink.scan_objects = ttm_pool_shrink_scan;
1403b1a3 Pauli Nieminen 2010-04-01  450  	manager->mm_shrink.seeks = 1;
1403b1a3 Pauli Nieminen 2010-04-01 @451  	register_shrinker(&manager->mm_shrink);
1403b1a3 Pauli Nieminen 2010-04-01  452  }
1403b1a3 Pauli Nieminen 2010-04-01  453  

:::::: The code at line 451 was first introduced by commit
:::::: 1403b1a38e8b19a4cc17e2c158e278628943a436 drm/ttm: add pool wc/uc page allocator V3

:::::: TO: Pauli Nieminen <suokkos@gmail.com>
:::::: CC: Dave Airlie <airlied@redhat.com>

---
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