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hc

2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/kernel/trace/trace_selftest.c
..
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@@ -23,7 +23,7 @@
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 	return 0;
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 }
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-static int trace_test_buffer_cpu(struct trace_buffer *buf, int cpu)
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+static int trace_test_buffer_cpu(struct array_buffer *buf, int cpu)
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 {
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 	struct ring_buffer_event *event;
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 	struct trace_entry *entry;
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@@ -60,7 +60,7 @@
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  * Test the trace buffer to see if all the elements
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  * are still sane.
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  */
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-static int __maybe_unused trace_test_buffer(struct trace_buffer *buf, unsigned long *count)
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+static int __maybe_unused trace_test_buffer(struct array_buffer *buf, unsigned long *count)
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 {
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 	unsigned long flags, cnt = 0;
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 	int cpu, ret = 0;
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@@ -362,7 +362,7 @@
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 	msleep(100);
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 	/* we should have nothing in the buffer */
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-	ret = trace_test_buffer(&tr->trace_buffer, &count);
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+	ret = trace_test_buffer(&tr->array_buffer, &count);
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 	if (ret)
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 		goto out;
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..
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@@ -383,7 +383,7 @@
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 	ftrace_enabled = 0;
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 	/* check the trace buffer */
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-	ret = trace_test_buffer(&tr->trace_buffer, &count);
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+	ret = trace_test_buffer(&tr->array_buffer, &count);
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387
 
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 	ftrace_enabled = 1;
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 	tracing_start();
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@@ -687,7 +687,7 @@
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 	ftrace_enabled = 0;
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688
 
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 	/* check the trace buffer */
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-	ret = trace_test_buffer(&tr->trace_buffer, &count);
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+	ret = trace_test_buffer(&tr->array_buffer, &count);
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 	ftrace_enabled = 1;
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 	trace->reset(tr);
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@@ -746,6 +746,11 @@
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 	return trace_graph_entry(trace);
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 }
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+static struct fgraph_ops fgraph_ops __initdata  = {
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+	.entryfunc		= &trace_graph_entry_watchdog,
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+	.retfunc		= &trace_graph_return,
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+};
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+
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 /*
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  * Pretty much the same than for the function tracer from which the selftest
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  * has been borrowed.
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@@ -768,10 +773,9 @@
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 	 * Simulate the init() callback but we attach a watchdog callback
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 	 * to detect and recover from possible hangs
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 	 */
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-	tracing_reset_online_cpus(&tr->trace_buffer);
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+	tracing_reset_online_cpus(&tr->array_buffer);
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 	set_graph_array(tr);
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-	ret = register_ftrace_graph(&trace_graph_return,
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-				    &trace_graph_entry_watchdog);
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+	ret = register_ftrace_graph(&fgraph_ops);
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 	if (ret) {
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 		warn_failed_init_tracer(trace, ret);
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 		goto out;
..
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@@ -783,7 +787,7 @@
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 	/* Have we just recovered from a hang? */
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 	if (graph_hang_thresh > GRAPH_MAX_FUNC_TEST) {
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-		tracing_selftest_disabled = true;
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+		disable_tracing_selftest("recovering from a hang");
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 		ret = -1;
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 		goto out;
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 	}
..
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@@ -791,9 +795,12 @@
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 	tracing_stop();
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 	/* check the trace buffer */
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-	ret = trace_test_buffer(&tr->trace_buffer, &count);
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+	ret = trace_test_buffer(&tr->array_buffer, &count);
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-	trace->reset(tr);
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+	/* Need to also simulate the tr->reset to remove this fgraph_ops */
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+	tracing_stop_cmdline_record();
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+	unregister_ftrace_graph(&fgraph_ops);
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+
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 	tracing_start();
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 	if (!ret && !count) {
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@@ -846,7 +853,7 @@
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 	/* stop the tracing. */
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 	tracing_stop();
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 	/* check both trace buffers */
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-	ret = trace_test_buffer(&tr->trace_buffer, NULL);
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+	ret = trace_test_buffer(&tr->array_buffer, NULL);
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 	if (!ret)
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 		ret = trace_test_buffer(&tr->max_buffer, &count);
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 	trace->reset(tr);
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@@ -908,7 +915,7 @@
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 	/* stop the tracing. */
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 	tracing_stop();
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 	/* check both trace buffers */
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-	ret = trace_test_buffer(&tr->trace_buffer, NULL);
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+	ret = trace_test_buffer(&tr->array_buffer, NULL);
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 	if (!ret)
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 		ret = trace_test_buffer(&tr->max_buffer, &count);
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 	trace->reset(tr);
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@@ -974,7 +981,7 @@
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 	/* stop the tracing. */
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 	tracing_stop();
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 	/* check both trace buffers */
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-	ret = trace_test_buffer(&tr->trace_buffer, NULL);
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+	ret = trace_test_buffer(&tr->array_buffer, NULL);
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 	if (ret)
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 		goto out;
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..
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@@ -1004,7 +1011,7 @@
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 	/* stop the tracing. */
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 	tracing_stop();
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 	/* check both trace buffers */
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-	ret = trace_test_buffer(&tr->trace_buffer, NULL);
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+	ret = trace_test_buffer(&tr->array_buffer, NULL);
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 	if (ret)
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 		goto out;
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..
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@@ -1134,7 +1141,7 @@
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 	/* stop the tracing. */
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 	tracing_stop();
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 	/* check both trace buffers */
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-	ret = trace_test_buffer(&tr->trace_buffer, NULL);
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+	ret = trace_test_buffer(&tr->array_buffer, NULL);
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 	if (!ret)
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 		ret = trace_test_buffer(&tr->max_buffer, &count);
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@@ -1175,7 +1182,7 @@
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 	/* stop the tracing. */
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 	tracing_stop();
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 	/* check the trace buffer */
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-	ret = trace_test_buffer(&tr->trace_buffer, &count);
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+	ret = trace_test_buffer(&tr->array_buffer, &count);
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 	trace->reset(tr);
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 	tracing_start();
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