Hi Thomas, kernel test robot noticed the following build errors:
[auto build test ERROR on drm-misc/drm-misc-next] [also build test ERROR on linus/master v7.1-rc3 next-20260508] [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/Thomas-Hellstr-m/drm-ttm-Fix-ttm_bo_shrink-infinite-LRU-walk-on-backup-failure/20260513-095356 base: https://gitlab.freedesktop.org/drm/misc/kernel.git drm-misc-next patch link: https://lore.kernel.org/r/20260511162443.24352-1-thomas.hellstrom%40linux.intel.com patch subject: [PATCH] drm/ttm: Fix ttm_bo_shrink() infinite LRU walk on backup failure config: powerpc-allmodconfig (https://download.01.org/0day-ci/archive/20260513/[email protected]/config) compiler: powerpc64-linux-gcc (GCC) 15.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260513/[email protected]/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 <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All errors (new ones prefixed by >>): drivers/gpu/drm/ttm/ttm_bo_util.c: In function 'ttm_bo_shrink': >> drivers/gpu/drm/ttm/ttm_bo_util.c:1121:17: error: implicit declaration of >> function 'ttm_resource_del_bulk_move_unevictable'; did you mean >> 'ttm_resource_del_bulk_move'? [-Wimplicit-function-declaration] 1121 | ttm_resource_del_bulk_move_unevictable(bo->resource, bo); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | ttm_resource_del_bulk_move vim +1121 drivers/gpu/drm/ttm/ttm_bo_util.c 1067 1068 /** 1069 * ttm_bo_shrink() - Helper to shrink a ttm buffer object. 1070 * @ctx: The struct ttm_operation_ctx used for the shrinking operation. 1071 * @bo: The buffer object. 1072 * @flags: Flags governing the shrinking behaviour. 1073 * 1074 * The function uses the ttm_tt_back_up functionality to back up or 1075 * purge a struct ttm_tt. If the bo is not in system, it's first 1076 * moved there. 1077 * 1078 * Return: The number of pages shrunken or purged, or 1079 * negative error code on failure. 1080 */ 1081 long ttm_bo_shrink(struct ttm_operation_ctx *ctx, struct ttm_buffer_object *bo, 1082 const struct ttm_bo_shrink_flags flags) 1083 { 1084 static const struct ttm_place sys_placement_flags = { 1085 .fpfn = 0, 1086 .lpfn = 0, 1087 .mem_type = TTM_PL_SYSTEM, 1088 .flags = 0, 1089 }; 1090 static struct ttm_placement sys_placement = { 1091 .num_placement = 1, 1092 .placement = &sys_placement_flags, 1093 }; 1094 struct ttm_device *bdev = bo->bdev; 1095 long lret; 1096 1097 dma_resv_assert_held(bo->base.resv); 1098 1099 if (flags.allow_move && bo->resource->mem_type != TTM_PL_SYSTEM) { 1100 int ret = ttm_bo_validate(bo, &sys_placement, ctx); 1101 1102 /* Consider -ENOMEM and -ENOSPC non-fatal. */ 1103 if (ret) { 1104 if (ret == -ENOMEM || ret == -ENOSPC) 1105 ret = -EBUSY; 1106 return ret; 1107 } 1108 } 1109 1110 ttm_bo_unmap_virtual(bo); 1111 lret = ttm_bo_wait_ctx(bo, ctx); 1112 if (lret < 0) 1113 return lret; 1114 1115 lret = ttm_tt_backup(bdev, bo->ttm, (struct ttm_backup_flags) 1116 {.purge = flags.purge, 1117 .writeback = flags.writeback}); 1118 1119 if (lret > 0) { 1120 spin_lock(&bdev->lru_lock); > 1121 ttm_resource_del_bulk_move_unevictable(bo->resource, > bo); 1122 ttm_resource_move_to_lru_tail(bo->resource); 1123 spin_unlock(&bdev->lru_lock); 1124 } 1125 1126 if (lret < 0 && lret != -EINTR) 1127 return -EBUSY; 1128 1129 return lret; 1130 } 1131 EXPORT_SYMBOL(ttm_bo_shrink); 1132 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
