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Message-ID: <202311071229.WGrWUjM1-lkp@intel.com>
Date: Tue, 7 Nov 2023 12:16:50 +0800
From: kernel test robot <lkp@...el.com>
To: "wuqiang.matt" <wuqiang.matt@...edance.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
"Masami Hiramatsu (Google)" <mhiramat@...nel.org>
Subject: lib/test_objpool.c:323:3: sparse: sparse: symbol 'g_ot_sync_ops' was
not declared. Should it be static?
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: be3ca57cfb777ad820c6659d52e60bbdd36bf5ff
commit: 92f90d3b0d5e384f218c8068138ed1b3afa025af lib: objpool test module added
date: 3 weeks ago
config: i386-randconfig-062-20231107 (https://download.01.org/0day-ci/archive/20231107/202311071229.WGrWUjM1-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231107/202311071229.WGrWUjM1-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311071229.WGrWUjM1-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
>> lib/test_objpool.c:323:3: sparse: sparse: symbol 'g_ot_sync_ops' was not declared. Should it be static?
>> lib/test_objpool.c:487:3: sparse: sparse: symbol 'g_ot_async_ops' was not declared. Should it be static?
>> lib/test_objpool.c:641:16: sparse: sparse: symbol 'g_testcases' was not declared. Should it be static?
vim +/g_ot_sync_ops +323 lib/test_objpool.c
319
320 struct {
321 struct ot_context * (*init)(struct ot_test *oc);
322 void (*fini)(struct ot_context *sop);
> 323 } g_ot_sync_ops[] = {
324 {.init = ot_init_sync_m0, .fini = ot_fini_sync},
325 };
326
327 /*
328 * synchronous test cases: performance mode
329 */
330
331 static void ot_bulk_sync(struct ot_item *item, int irq)
332 {
333 struct ot_node *nods[OT_NR_MAX_BULK];
334 int i;
335
336 for (i = 0; i < item->bulk[irq]; i++)
337 nods[i] = objpool_pop(item->pool);
338
339 if (!irq && (item->delay || !(++(item->niters) & 0x7FFF)))
340 msleep(item->delay);
341
342 while (i-- > 0) {
343 struct ot_node *on = nods[i];
344 if (on) {
345 on->refs++;
346 objpool_push(on, item->pool);
347 item->stat[irq].nhits++;
348 } else {
349 item->stat[irq].nmiss++;
350 }
351 }
352 }
353
354 static int ot_start_sync(struct ot_test *test)
355 {
356 struct ot_context *sop;
357 ktime_t start;
358 u64 duration;
359 unsigned long timeout;
360 int cpu;
361
362 /* initialize objpool for syncrhonous testcase */
363 sop = g_ot_sync_ops[test->mode].init(test);
364 if (!sop)
365 return -ENOMEM;
366
367 /* grab rwsem to block testing threads */
368 down_write(&test->data.start);
369
370 for_each_possible_cpu(cpu) {
371 struct ot_item *item = per_cpu_ptr(&ot_pcup_items, cpu);
372 struct task_struct *work;
373
374 ot_init_cpu_item(item, test, &sop->pool, ot_bulk_sync);
375
376 /* skip offline cpus */
377 if (!cpu_online(cpu))
378 continue;
379
380 work = kthread_create_on_node(ot_thread_worker, item,
381 cpu_to_node(cpu), "ot_worker_%d", cpu);
382 if (IS_ERR(work)) {
383 pr_err("failed to create thread for cpu %d\n", cpu);
384 } else {
385 kthread_bind(work, cpu);
386 wake_up_process(work);
387 }
388 }
389
390 /* wait a while to make sure all threads waiting at start line */
391 msleep(20);
392
393 /* in case no threads were created: memory insufficient ? */
394 if (atomic_dec_and_test(&test->data.nthreads))
395 complete(&test->data.wait);
396
397 // sched_set_fifo_low(current);
398
399 /* start objpool testing threads */
400 start = ktime_get();
401 up_write(&test->data.start);
402
403 /* yeild cpu to worker threads for duration ms */
404 timeout = msecs_to_jiffies(test->duration);
405 schedule_timeout_interruptible(timeout);
406
407 /* tell workers threads to quit */
408 atomic_set_release(&test->data.stop, 1);
409
410 /* wait all workers threads finish and quit */
411 wait_for_completion(&test->data.wait);
412 duration = (u64) ktime_us_delta(ktime_get(), start);
413
414 /* cleanup objpool */
415 g_ot_sync_ops[test->mode].fini(sop);
416
417 /* report testing summary and performance results */
418 ot_perf_report(test, duration);
419
420 /* report memory allocation summary */
421 ot_mem_report(test);
422
423 return 0;
424 }
425
426 /*
427 * asynchronous test cases: pool lifecycle controlled by refcount
428 */
429
430 static void ot_fini_async_rcu(struct rcu_head *rcu)
431 {
432 struct ot_context *sop = container_of(rcu, struct ot_context, rcu);
433 struct ot_test *test = sop->test;
434
435 /* here all cpus are aware of the stop event: test->data.stop = 1 */
436 WARN_ON(!atomic_read_acquire(&test->data.stop));
437
438 objpool_fini(&sop->pool);
439 complete(&test->data.rcu);
440 }
441
442 static void ot_fini_async(struct ot_context *sop)
443 {
444 /* make sure the stop event is acknowledged by all cores */
445 call_rcu(&sop->rcu, ot_fini_async_rcu);
446 }
447
448 static int ot_objpool_release(struct objpool_head *head, void *context)
449 {
450 struct ot_context *sop = context;
451
452 WARN_ON(!head || !sop || head != &sop->pool);
453
454 /* do context cleaning if needed */
455 if (sop)
456 ot_kfree(sop->test, sop, sizeof(*sop));
457
458 return 0;
459 }
460
461 static struct ot_context *ot_init_async_m0(struct ot_test *test)
462 {
463 struct ot_context *sop = NULL;
464 int max = num_possible_cpus() << 3;
465 gfp_t gfp = GFP_KERNEL;
466
467 sop = (struct ot_context *)ot_kzalloc(test, sizeof(*sop));
468 if (!sop)
469 return NULL;
470 sop->test = test;
471 if (test->objsz < 512)
472 gfp = GFP_ATOMIC;
473
474 if (objpool_init(&sop->pool, max, test->objsz, gfp, sop,
475 ot_init_node, ot_objpool_release)) {
476 ot_kfree(test, sop, sizeof(*sop));
477 return NULL;
478 }
479 WARN_ON(max != sop->pool.nr_objs);
480
481 return sop;
482 }
483
484 struct {
485 struct ot_context * (*init)(struct ot_test *oc);
486 void (*fini)(struct ot_context *sop);
> 487 } g_ot_async_ops[] = {
488 {.init = ot_init_async_m0, .fini = ot_fini_async},
489 };
490
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