Re: [PATCH 04/17] ttm/pool: port to list_lru. (v2)

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

Hi Dave,

kernel test robot noticed the following build errors:

[auto build test ERROR on drm/drm-next]
[also build test ERROR on v6.16-rc4]
[cannot apply to akpm-mm/mm-everything linus/master next-20250630]
[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/Dave-Airlie/drm-ttm-use-gpu-mm-stats-to-track-gpu-memory-allocations-v2/20250630-134938
base:   git://anongit.freedesktop.org/drm/drm drm-next
patch link:    https://lore.kernel.org/r/20250630045005.1337339-5-airlied%40gmail.com
patch subject: [PATCH 04/17] ttm/pool: port to list_lru. (v2)
config: i386-buildonly-randconfig-003-20250630 (https://download.01.org/0day-ci/archive/20250630/202506301808.C73SwQJr-lkp@intel.com/config)
compiler: clang version 20.1.7 (https://github.com/llvm/llvm-project 6146a88f60492b520a36f8f8f3231e15f3cc6082)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250630/202506301808.C73SwQJr-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/202506301808.C73SwQJr-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/gpu/drm/i915/intel_region_ttm.c:5:
   In file included from include/drm/ttm/ttm_device.h:31:
>> include/drm/ttm/ttm_pool.h:57:18: error: field has incomplete type 'struct list_lru'
      57 |         struct list_lru pages;
         |                         ^
   include/linux/xarray.h:25:8: note: forward declaration of 'struct list_lru'
      25 | struct list_lru;
         |        ^
   In file included from drivers/gpu/drm/i915/intel_region_ttm.c:8:
   In file included from drivers/gpu/drm/i915/i915_drv.h:35:
   In file included from include/linux/pci.h:1656:
   In file included from include/linux/dmapool.h:15:
   In file included from include/linux/scatterlist.h:8:
   In file included from include/linux/mm.h:36:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:6:
   include/linux/signal.h:98:11: warning: array index 3 is past the end of the array (that has type 'unsigned long[2]') [-Warray-bounds]
      98 |                 return (set->sig[3] | set->sig[2] |
         |                         ^        ~
   arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
      24 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from drivers/gpu/drm/i915/intel_region_ttm.c:8:
   In file included from drivers/gpu/drm/i915/i915_drv.h:35:
   In file included from include/linux/pci.h:1656:
   In file included from include/linux/dmapool.h:15:
   In file included from include/linux/scatterlist.h:8:
   In file included from include/linux/mm.h:36:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:6:
   include/linux/signal.h:98:25: warning: array index 2 is past the end of the array (that has type 'unsigned long[2]') [-Warray-bounds]
      98 |                 return (set->sig[3] | set->sig[2] |
         |                                       ^        ~
   arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
      24 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from drivers/gpu/drm/i915/intel_region_ttm.c:8:
   In file included from drivers/gpu/drm/i915/i915_drv.h:35:
   In file included from include/linux/pci.h:1656:
   In file included from include/linux/dmapool.h:15:
   In file included from include/linux/scatterlist.h:8:
   In file included from include/linux/mm.h:36:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:6:
   include/linux/signal.h:114:11: warning: array index 3 is past the end of the array (that has type 'const unsigned long[2]') [-Warray-bounds]
     114 |                 return  (set1->sig[3] == set2->sig[3]) &&
         |                          ^         ~
   arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
      24 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from drivers/gpu/drm/i915/intel_region_ttm.c:8:
   In file included from drivers/gpu/drm/i915/i915_drv.h:35:
   In file included from include/linux/pci.h:1656:
   In file included from include/linux/dmapool.h:15:
   In file included from include/linux/scatterlist.h:8:
   In file included from include/linux/mm.h:36:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:6:
   include/linux/signal.h:114:27: warning: array index 3 is past the end of the array (that has type 'const unsigned long[2]') [-Warray-bounds]
     114 |                 return  (set1->sig[3] == set2->sig[3]) &&
         |                                          ^         ~
   arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
      24 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from drivers/gpu/drm/i915/intel_region_ttm.c:8:
   In file included from drivers/gpu/drm/i915/i915_drv.h:35:
   In file included from include/linux/pci.h:1656:
   In file included from include/linux/dmapool.h:15:
   In file included from include/linux/scatterlist.h:8:
   In file included from include/linux/mm.h:36:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:6:
   include/linux/signal.h:115:5: warning: array index 2 is past the end of the array (that has type 'const unsigned long[2]') [-Warray-bounds]
     115 |                         (set1->sig[2] == set2->sig[2]) &&
         |                          ^         ~
   arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
      24 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from drivers/gpu/drm/i915/intel_region_ttm.c:8:
   In file included from drivers/gpu/drm/i915/i915_drv.h:35:
   In file included from include/linux/pci.h:1656:
   In file included from include/linux/dmapool.h:15:
   In file included from include/linux/scatterlist.h:8:
   In file included from include/linux/mm.h:36:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:6:
   include/linux/signal.h:115:21: warning: array index 2 is past the end of the array (that has type 'const unsigned long[2]') [-Warray-bounds]
     115 |                         (set1->sig[2] == set2->sig[2]) &&
         |                                          ^         ~
   arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
      24 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from drivers/gpu/drm/i915/intel_region_ttm.c:8:
   In file included from drivers/gpu/drm/i915/i915_drv.h:35:
   In file included from include/linux/pci.h:1656:
   In file included from include/linux/dmapool.h:15:
   In file included from include/linux/scatterlist.h:8:
   In file included from include/linux/mm.h:36:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:6:
   include/linux/signal.h:157:1: warning: array index 3 is past the end of the array (that has type 'const unsigned long[2]') [-Warray-bounds]
     157 | _SIG_SET_BINOP(sigorsets, _sig_or)
         | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +57 include/drm/ttm/ttm_pool.h

    40	
    41	/**
    42	 * struct ttm_pool_type - Pool for a certain memory type
    43	 *
    44	 * @pool: the pool we belong to, might be NULL for the global ones
    45	 * @order: the allocation order our pages have
    46	 * @caching: the caching type our pages have
    47	 * @shrinker_list: our place on the global shrinker list
    48	 * @pages: the lru_list of pages in the pool
    49	 */
    50	struct ttm_pool_type {
    51		struct ttm_pool *pool;
    52		unsigned int order;
    53		enum ttm_caching caching;
    54	
    55		struct list_head shrinker_list;
    56	
  > 57		struct list_lru pages;
    58	};
    59	

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