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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/include/linux/trace.h
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@@ -3,6 +3,11 @@
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 #define _LINUX_TRACE_H
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 #ifdef CONFIG_TRACING
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+
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+#define TRACE_EXPORT_FUNCTION	BIT(0)
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+#define TRACE_EXPORT_EVENT	BIT(1)
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+#define TRACE_EXPORT_MARKER	BIT(2)
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+
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 /*
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  * The trace export - an export of Ftrace output. The trace_export
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  * can process traces and export them to a registered destination as
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@@ -15,15 +20,26 @@
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  * next		- pointer to the next trace_export
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  * write	- copy traces which have been delt with ->commit() to
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  *		  the destination
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+ * flags	- which ftrace to be exported
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  */
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 struct trace_export {
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 	struct trace_export __rcu	*next;
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 	void (*write)(struct trace_export *, const void *, unsigned int);
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+	int flags;
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 };
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 int register_ftrace_export(struct trace_export *export);
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 int unregister_ftrace_export(struct trace_export *export);
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+struct trace_array;
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+
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+void trace_printk_init_buffers(void);
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+int trace_array_printk(struct trace_array *tr, unsigned long ip,
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+		const char *fmt, ...);
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+int trace_array_init_printk(struct trace_array *tr);
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+void trace_array_put(struct trace_array *tr);
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+struct trace_array *trace_array_get_by_name(const char *name);
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+int trace_array_destroy(struct trace_array *tr);
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 #endif	/* CONFIG_TRACING */
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 #endif	/* _LINUX_TRACE_H */