tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git perf/core head: 81d3fdc7ba3ed0763391798a1ba382bd3d3b865c commit: 878461943fbe9f4ae8bfc32a74727c42f3468f0f [3/7] perf: Disallow aux_output for kernel events reproduce: # apt-get install sparse # sparse version: v0.6.1-dirty git checkout 878461943fbe9f4ae8bfc32a74727c42f3468f0f make ARCH=x86_64 allmodconfig make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) kernel/events/core.c:571:26: sparse: sparse: function 'perf_pmu_name' with external linkage has definition kernel/events/core.c:1384:15: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:1384:15: sparse: struct perf_event_context [noderef] <asn:4> * kernel/events/core.c:1384:15: sparse: struct perf_event_context * kernel/events/core.c:1397:28: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:1397:28: sparse: struct perf_event_context [noderef] <asn:4> * kernel/events/core.c:1397:28: sparse: struct perf_event_context * kernel/events/core.c:3206:18: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:3206:18: sparse: struct perf_event_context [noderef] <asn:4> * kernel/events/core.c:3206:18: sparse: struct perf_event_context * kernel/events/core.c:3207:23: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:3207:23: sparse: struct perf_event_context [noderef] <asn:4> * kernel/events/core.c:3207:23: sparse: struct perf_event_context * kernel/events/core.c:3249:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:3249:25: sparse: struct perf_event_context [noderef] <asn:4> * kernel/events/core.c:3249:25: sparse: struct perf_event_context * kernel/events/core.c:3250:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:3250:25: sparse: struct perf_event_context [noderef] <asn:4> * kernel/events/core.c:3250:25: sparse: struct perf_event_context * kernel/events/core.c:4325:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:4325:25: sparse: struct perf_event_context [noderef] <asn:4> * kernel/events/core.c:4325:25: sparse: struct perf_event_context * kernel/events/core.c:5549:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:5549:9: sparse: struct ring_buffer [noderef] <asn:4> * kernel/events/core.c:5549:9: sparse: struct ring_buffer * kernel/events/core.c:5057:24: sparse: sparse: incorrect type in assignment (different base types) @@ expected restricted __poll_t [usertype] events @@ got e] events @@ kernel/events/core.c:5057:24: sparse: expected restricted __poll_t [usertype] events kernel/events/core.c:5057:24: sparse: got int kernel/events/core.c:5255:22: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:5255:22: sparse: struct ring_buffer [noderef] <asn:4> * kernel/events/core.c:5255:22: sparse: struct ring_buffer * kernel/events/core.c:5391:14: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:5391:14: sparse: struct ring_buffer [noderef] <asn:4> * kernel/events/core.c:5391:14: sparse: struct ring_buffer * kernel/events/core.c:5424:14: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:5424:14: sparse: struct ring_buffer [noderef] <asn:4> * kernel/events/core.c:5424:14: sparse: struct ring_buffer * kernel/events/core.c:5481:14: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:5481:14: sparse: struct ring_buffer [noderef] <asn:4> * kernel/events/core.c:5481:14: sparse: struct ring_buffer * kernel/events/core.c:5567:14: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:5567:14: sparse: struct ring_buffer [noderef] <asn:4> * kernel/events/core.c:5567:14: sparse: struct ring_buffer * kernel/events/core.c:5580:14: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:5580:14: sparse: struct ring_buffer [noderef] <asn:4> * kernel/events/core.c:5580:14: sparse: struct ring_buffer * kernel/events/internal.h:203:1: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const [noderef] <asn:1> *from @@ got f] <asn:1> *from @@ kernel/events/internal.h:203:1: sparse: expected void const [noderef] <asn:1> *from kernel/events/internal.h:203:1: sparse: got void const *buf kernel/events/core.c:6900:23: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:6900:23: sparse: struct perf_event_context [noderef] <asn:4> * kernel/events/core.c:6900:23: sparse: struct perf_event_context * kernel/events/core.c:6991:13: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:6991:13: sparse: struct ring_buffer [noderef] <asn:4> * kernel/events/core.c:6991:13: sparse: struct ring_buffer * kernel/events/core.c:7679:23: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:7679:23: sparse: struct perf_event_context [noderef] <asn:4> * kernel/events/core.c:7679:23: sparse: struct perf_event_context * kernel/events/core.c:8409:17: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:8409:17: sparse: struct swevent_hlist [noderef] <asn:4> * kernel/events/core.c:8409:17: sparse: struct swevent_hlist * kernel/events/core.c:8429:17: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:8429:17: sparse: struct swevent_hlist [noderef] <asn:4> * kernel/events/core.c:8429:17: sparse: struct swevent_hlist * kernel/events/core.c:8549:16: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:8549:16: sparse: struct swevent_hlist [noderef] <asn:4> * kernel/events/core.c:8549:16: sparse: struct swevent_hlist * kernel/events/core.c:8560:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:8560:9: sparse: struct swevent_hlist [noderef] <asn:4> * kernel/events/core.c:8560:9: sparse: struct swevent_hlist * kernel/events/core.c:8549:16: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:8549:16: sparse: struct swevent_hlist [noderef] <asn:4> * kernel/events/core.c:8549:16: sparse: struct swevent_hlist * kernel/events/core.c:8599:17: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:8599:17: sparse: struct swevent_hlist [noderef] <asn:4> * kernel/events/core.c:8599:17: sparse: struct swevent_hlist * kernel/events/core.c:8780:23: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:8780:23: sparse: struct perf_event_context [noderef] <asn:4> * kernel/events/core.c:8780:23: sparse: struct perf_event_context * kernel/events/core.c:9951:1: sparse: sparse: symbol 'dev_attr_nr_addr_filters' was not declared. Should it be static? kernel/events/core.c:11423:24: sparse: got int kernel/events/core.c:11666:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:11666:9: sparse: struct perf_event_context [noderef] <asn:4> * kernel/events/core.c:11666:9: sparse: struct perf_event_context * kernel/events/core.c:11776:17: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:11776:17: sparse: struct perf_event_context [noderef] <asn:4> * kernel/events/core.c:11776:17: sparse: struct perf_event_context * kernel/events/core.c:8549:16: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:8549:16: sparse: struct swevent_hlist [noderef] <asn:4> * kernel/events/core.c:8549:16: sparse: struct swevent_hlist * kernel/events/core.c:12200:17: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:12200:17: sparse: struct swevent_hlist [noderef] <asn:4> * kernel/events/core.c:12200:17: sparse: struct swevent_hlist * kernel/events/core.c:155:9: sparse: sparse: context imbalance in 'perf_ctx_lock' - wrong count at exit kernel/events/core.c:163:17: sparse: sparse: context imbalance in 'perf_ctx_unlock' - unexpected unlock kernel/events/core.c:1404:17: sparse: sparse: context imbalance in 'perf_lock_task_context' - different lock contexts for basic block kernel/events/core.c:1431:17: sparse: sparse: context imbalance in 'perf_pin_task_context' - unexpected unlock kernel/events/core.c:2636:9: sparse: sparse: context imbalance in '__perf_install_in_context' - wrong count at exit kernel/events/core.c:4297:17: sparse: sparse: context imbalance in 'find_get_context' - unexpected unlock kernel/events/core.c:10320:9: sparse: sparse: context imbalance in 'perf_init_event' - different lock contexts for basic block vim +11423 kernel/events/core.c 11400 11401 /** 11402 * perf_event_create_kernel_counter 11403 * 11404 * @attr: attributes of the counter to create 11405 * @cpu: cpu in which the counter is bound 11406 * @task: task to profile (NULL for percpu) 11407 */ 11408 struct perf_event * 11409 perf_event_create_kernel_counter(struct perf_event_attr *attr, int cpu, 11410 struct task_struct *task, 11411 perf_overflow_handler_t overflow_handler, 11412 void *context) 11413 { 11414 struct perf_event_context *ctx; 11415 struct perf_event *event; 11416 int err; 11417 11418 /* 11419 * Grouping is not supported for kernel events, neither is 'AUX', 11420 * make sure the caller's intentions are adjusted. 11421 */ 11422 if (attr->aux_output) 11423 return -EINVAL; 11424 11425 event = perf_event_alloc(attr, cpu, task, NULL, NULL, 11426 overflow_handler, context, -1); 11427 if (IS_ERR(event)) { 11428 err = PTR_ERR(event); 11429 goto err; 11430 } 11431 11432 /* Mark owner so we could distinguish it from user events. */ 11433 event->owner = TASK_TOMBSTONE; 11434 11435 /* 11436 * Get the target context (task or percpu): 11437 */ 11438 ctx = find_get_context(event->pmu, task, event); 11439 if (IS_ERR(ctx)) { 11440 err = PTR_ERR(ctx); 11441 goto err_free; 11442 } 11443 11444 WARN_ON_ONCE(ctx->parent_ctx); 11445 mutex_lock(&ctx->mutex); 11446 if (ctx->task == TASK_TOMBSTONE) { 11447 err = -ESRCH; 11448 goto err_unlock; 11449 } 11450 11451 if (!task) { 11452 /* 11453 * Check if the @cpu we're creating an event for is online. 11454 * 11455 * We use the perf_cpu_context::ctx::mutex to serialize against 11456 * the hotplug notifiers. See perf_event_{init,exit}_cpu(). 11457 */ 11458 struct perf_cpu_context *cpuctx = 11459 container_of(ctx, struct perf_cpu_context, ctx); 11460 if (!cpuctx->online) { 11461 err = -ENODEV; 11462 goto err_unlock; 11463 } 11464 } 11465 11466 if (!exclusive_event_installable(event, ctx)) { 11467 err = -EBUSY; 11468 goto err_unlock; 11469 } 11470 11471 perf_install_in_context(ctx, event, event->cpu); 11472 perf_unpin_context(ctx); 11473 mutex_unlock(&ctx->mutex); 11474 11475 return event; 11476 11477 err_unlock: 11478 mutex_unlock(&ctx->mutex); 11479 perf_unpin_context(ctx); 11480 put_ctx(ctx); 11481 err_free: 11482 free_event(event); 11483 err: 11484 return ERR_PTR(err); 11485 } 11486 EXPORT_SYMBOL_GPL(perf_event_create_kernel_counter); 11487 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation