tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: be758a5796c3d280deb877699c41fd0cd04e1deb commit: 2e9ef6c3ea086c85d489898471e527aeb3f7460b [2909/2909] mm/damon/vaddr: Support hardware-assisted memory access sampling config: arm64-randconfig-r121-20250923 (https://download.01.org/0day-ci/archive/20250923/202509231424.83tDZFT5-lkp@i...) compiler: clang version 16.0.6 (https://github.com/llvm/llvm-project 7cbf1a2591520c2491aa35339f227775f4d3adf6) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250923/202509231424.83tDZFT5-lkp@i...) 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/202509231424.83tDZFT5-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) mm/mem_sampling.c:48:33: sparse: sparse: symbol 'mem_sampling_saved_state' was not declared. Should it be static? mm/mem_sampling.c:61:1: sparse: sparse: symbol 'mem_sampling_record_cb_list' was not declared. Should it be static? mm/mem_sampling.c:69:6: sparse: sparse: symbol 'mem_sampling_record_cb_register' was not declared. Should it be static? mm/mem_sampling.c:86:6: sparse: sparse: symbol 'mem_sampling_record_cb_unregister' was not declared. Should it be static?

...

mm/mem_sampling.c:293:1: sparse: sparse: symbol 'mm_damon_mem_sampling' was not declared. Should it be static?

vim +/mm_damon_mem_sampling +293 mm/mem_sampling.c 292

293 DEFINE_STATIC_KEY_FALSE(mm_damon_mem_sampling); 294 #ifdef CONFIG_DAMON_MEM_SAMPLING 295 static void damon_mem_sampling_record_cb(struct mem_sampling_record *record) 296 { 297 struct damon_mem_sampling_fifo *damon_fifo; 298 struct damon_mem_sampling_record domon_record; 299 struct task_struct *task = NULL; 300 struct mm_struct *mm; 301 302 /* Discard kernel address accesses */ 303 if (record->virt_addr & (1UL << 63)) 304 return; 305 306 task = find_get_task_by_vpid((pid_t)record->context_id); 307 if (!task) 308 return; 309 310 mm = get_task_mm(task); 311 put_task_struct(task); 312 if (!mm) 313 return; 314 315 damon_fifo = mm->damon_fifo; 316 mmput(mm); 317 318 domon_record.vaddr = record->virt_addr; 319 320 /* only the proc under monitor now has damon_fifo */ 321 if (damon_fifo) { 322 if (kfifo_is_full(&damon_fifo->rx_kfifo)) 323 return; 324 325 kfifo_in_locked(&damon_fifo->rx_kfifo, &domon_record, 326 sizeof(struct damon_mem_sampling_record), 327 &damon_fifo->rx_kfifo_lock); 328 return; 329 } 330 } 331

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