Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf fixes from Thomas Gleixner:
 "This is much bigger than typical fixes, but Peter found a category of
  races that spurred more fixes and more debugging enhancements.  Work
  started before the merge window, but got finished only now.

  Aside of that this contains the usual small fixes to perf and tools.
  Nothing particular exciting"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (43 commits)
  perf: Remove/simplify lockdep annotation
  perf: Synchronously clean up child events
  perf: Untangle 'owner' confusion
  perf: Add flags argument to perf_remove_from_context()
  perf: Clean up sync_child_event()
  perf: Robustify event->owner usage and SMP ordering
  perf: Fix STATE_EXIT usage
  perf: Update locking order
  perf: Remove __free_event()
  perf/bpf: Convert perf_event_array to use struct file
  perf: Fix NULL deref
  perf/x86: De-obfuscate code
  perf/x86: Fix uninitialized value usage
  perf: Fix race in perf_event_exit_task_context()
  perf: Fix orphan hole
  perf stat: Do not clean event's private stats
  perf hists: Fix HISTC_MEM_DCACHELINE width setting
  perf annotate browser: Fix behaviour of Shift-Tab with nothing focussed
  perf tests: Remove wrong semicolon in while loop in CQM test
  perf: Synchronously free aux pages in case of allocation failure
  ...

kernel/bpf/arraymap.c

@@ -291,10 +291,13 @@ static void *perf_event_fd_array_get_ptr(struct bpf_map *map, int fd)
 {
 	struct perf_event *event;
 	const struct perf_event_attr *attr;
+	struct file *file;
 
-	event = perf_event_get(fd);
-	if (IS_ERR(event))
-		return event;
+	file = perf_event_get(fd);
+	if (IS_ERR(file))
+		return file;
+
+	event = file->private_data;
 
 	attr = perf_event_attrs(event);
 	if (IS_ERR(attr))
@@ -304,24 +307,22 @@ static void *perf_event_fd_array_get_ptr(struct bpf_map *map, int fd)
 		goto err;
 
 	if (attr->type == PERF_TYPE_RAW)
-		return event;
+		return file;
 
 	if (attr->type == PERF_TYPE_HARDWARE)
-		return event;
+		return file;
 
 	if (attr->type == PERF_TYPE_SOFTWARE &&
 	    attr->config == PERF_COUNT_SW_BPF_OUTPUT)
-		return event;
+		return file;
 err:
-	perf_event_release_kernel(event);
+	fput(file);
 	return ERR_PTR(-EINVAL);
 }
 
 static void perf_event_fd_array_put_ptr(void *ptr)
 {
-	struct perf_event *event = ptr;
-
-	perf_event_release_kernel(event);
+	fput((struct file *)ptr);
 }
 
 static const struct bpf_map_ops perf_event_array_ops = {

kernel/events/hw_breakpoint.c

@@ -444,7 +444,7 @@ int modify_user_hw_breakpoint(struct perf_event *bp, struct perf_event_attr *att
 	 * current task.
 	 */
 	if (irqs_disabled() && bp->ctx && bp->ctx->task == current)
-		__perf_event_disable(bp);
+		perf_event_disable_local(bp);
 	else
 		perf_event_disable(bp);
 

kernel/events/ring_buffer.c

@@ -459,6 +459,25 @@ static void rb_free_aux_page(struct ring_buffer *rb, int idx)
 	__free_page(page);
 }
 
+static void __rb_free_aux(struct ring_buffer *rb)
+{
+	int pg;
+
+	if (rb->aux_priv) {
+		rb->free_aux(rb->aux_priv);
+		rb->free_aux = NULL;
+		rb->aux_priv = NULL;
+	}
+
+	if (rb->aux_nr_pages) {
+		for (pg = 0; pg < rb->aux_nr_pages; pg++)
+			rb_free_aux_page(rb, pg);
+
+		kfree(rb->aux_pages);
+		rb->aux_nr_pages = 0;
+	}
+}
+
 int rb_alloc_aux(struct ring_buffer *rb, struct perf_event *event,
 		 pgoff_t pgoff, int nr_pages, long watermark, int flags)
 {
@@ -547,30 +566,11 @@ out:
 	if (!ret)
 		rb->aux_pgoff = pgoff;
 	else
-		rb_free_aux(rb);
+		__rb_free_aux(rb);
 
 	return ret;
 }
 
-static void __rb_free_aux(struct ring_buffer *rb)
-{
-	int pg;
-
-	if (rb->aux_priv) {
-		rb->free_aux(rb->aux_priv);
-		rb->free_aux = NULL;
-		rb->aux_priv = NULL;
-	}
-
-	if (rb->aux_nr_pages) {
-		for (pg = 0; pg < rb->aux_nr_pages; pg++)
-			rb_free_aux_page(rb, pg);
-
-		kfree(rb->aux_pages);
-		rb->aux_nr_pages = 0;
-	}
-}
-
 void rb_free_aux(struct ring_buffer *rb)
 {
 	if (atomic_dec_and_test(&rb->aux_refcount))

kernel/trace/bpf_trace.c

@@ -191,14 +191,17 @@ static u64 bpf_perf_event_read(u64 r1, u64 index, u64 r3, u64 r4, u64 r5)
 	struct bpf_map *map = (struct bpf_map *) (unsigned long) r1;
 	struct bpf_array *array = container_of(map, struct bpf_array, map);
 	struct perf_event *event;
+	struct file *file;
 
 	if (unlikely(index >= array->map.max_entries))
 		return -E2BIG;
 
-	event = (struct perf_event *)array->ptrs[index];
-	if (!event)
+	file = (struct file *)array->ptrs[index];
+	if (unlikely(!file))
 		return -ENOENT;
 
+	event = file->private_data;
+
 	/* make sure event is local and doesn't have pmu::count */
 	if (event->oncpu != smp_processor_id() ||
 	    event->pmu->count)
@@ -228,6 +231,7 @@ static u64 bpf_perf_event_output(u64 r1, u64 r2, u64 index, u64 r4, u64 size)
 	void *data = (void *) (long) r4;
 	struct perf_sample_data sample_data;
 	struct perf_event *event;
+	struct file *file;
 	struct perf_raw_record raw = {
 		.size = size,
 		.data = data,
@@ -236,10 +240,12 @@ static u64 bpf_perf_event_output(u64 r1, u64 r2, u64 index, u64 r4, u64 size)
 	if (unlikely(index >= array->map.max_entries))
 		return -E2BIG;
 
-	event = (struct perf_event *)array->ptrs[index];
-	if (unlikely(!event))
+	file = (struct file *)array->ptrs[index];
+	if (unlikely(!file))
 		return -ENOENT;
 
+	event = file->private_data;
+
 	if (unlikely(event->attr.type != PERF_TYPE_SOFTWARE ||
 		     event->attr.config != PERF_COUNT_SW_BPF_OUTPUT))
 		return -EINVAL;