tracing: Addition of tracing instances via kernel command line

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index 863716fcca49..5b16af9e7d30 100644
@@ -10188,6 +10188,10 @@ __init static void enable_instances(void)
 		}
 		/* Allow user space to delete it */
 		trace_array_put(tr);
+
+		while ((tok = strsep(&curr_str, ","))) {
+			early_enable_events(tr, tok, true);
+		}
 	}
 }
 

index d16929dd0f08..f10bf804dd2b 100644
@@ -1334,6 +1334,8 @@ DECLARE_PER_CPU(int, trace_buffered_event_cnt);
 void trace_buffered_event_disable(void);
 void trace_buffered_event_enable(void);
 
+void early_enable_events(struct trace_array *tr, char *buf, bool disable_first);
+
 static inline void
 __trace_event_discard_commit(struct trace_buffer *buffer,
 			     struct ring_buffer_event *event)

index b07931ad97de..cf3fd74fa675 100644
@@ -3750,10 +3750,9 @@ static __init int event_trace_memsetup(void)
 	return 0;
 }
 
-static __init void
-early_enable_events(struct trace_array *tr, bool disable_first)
+__init void
+early_enable_events(struct trace_array *tr, char *buf, bool disable_first)
 {
-	char *buf = bootup_event_buf;
 	char *token;
 	int ret;
 

@@ -3806,7 +3805,7 @@ static __init int event_trace_enable(void)
 	 */
 	__trace_early_add_events(tr);
 
-	early_enable_events(tr, false);
+	early_enable_events(tr, bootup_event_buf, false);
 
 	trace_printk_start_comm();
 

@@ -3834,7 +3833,7 @@ static __init int event_trace_enable_again(void)
 	if (!tr)
 		return -ENODEV;
 
-	early_enable_events(tr, true);
+	early_enable_events(tr, bootup_event_buf, true);
 
 	return 0;
 }

index 80ffda871749..2a70a447184c 100644
@@ -33,6 +33,18 @@ struct trace_array;
 int register_ftrace_export(struct trace_export *export);
 int unregister_ftrace_export(struct trace_export *export);
 
+/**
+ * trace_array_puts - write a constant string into the trace buffer.
+ * @tr:    The trace array to write to
+ * @str:   The constant string to write
+ */
+#define trace_array_puts(tr, str)					\
+	({								\
+		str ? __trace_array_puts(tr, _THIS_IP_, str, strlen(str)) : -1;	\
+	})
+int __trace_array_puts(struct trace_array *tr, unsigned long ip,
+		       const char *str, int size);
+
 void trace_printk_init_buffers(void);
 __printf(3, 4)
 int trace_array_printk(struct trace_array *tr, unsigned long ip,

index 5b16af9e7d30..9918bf7441ed 100644
@@ -1023,13 +1023,8 @@ __buffer_unlock_commit(struct trace_buffer *buffer, struct ring_buffer_event *ev
 		ring_buffer_unlock_commit(buffer);
 }
 
-/**
- * __trace_puts - write a constant string into the trace buffer.
- * @ip:	   The address of the caller
- * @str:   The constant string to write
- * @size:  The size of the string.
- */
-int __trace_puts(unsigned long ip, const char *str, int size)
+int __trace_array_puts(struct trace_array *tr, unsigned long ip,
+		       const char *str, int size)
 {
 	struct ring_buffer_event *event;
 	struct trace_buffer *buffer;

@@ -1037,7 +1032,7 @@ int __trace_puts(unsigned long ip, const char *str, int size)
 	unsigned int trace_ctx;
 	int alloc;
 
-	if (!(global_trace.trace_flags & TRACE_ITER_PRINTK))
+	if (!(tr->trace_flags & TRACE_ITER_PRINTK))
 		return 0;
 
 	if (unlikely(tracing_selftest_running || tracing_disabled))

@@ -1046,7 +1041,7 @@ int __trace_puts(unsigned long ip, const char *str, int size)
 	alloc = sizeof(*entry) + size + 2; /* possible \n added */
 
 	trace_ctx = tracing_gen_ctx();
-	buffer = global_trace.array_buffer.buffer;
+	buffer = tr->array_buffer.buffer;
 	ring_buffer_nest_start(buffer);
 	event = __trace_buffer_lock_reserve(buffer, TRACE_PRINT, alloc,
 					    trace_ctx);

@@ -1068,11 +1063,23 @@ int __trace_puts(unsigned long ip, const char *str, int size)
 		entry->buf[size] = '\0';
 
 	__buffer_unlock_commit(buffer, event);
-	ftrace_trace_stack(&global_trace, buffer, trace_ctx, 4, NULL);
+	ftrace_trace_stack(tr, buffer, trace_ctx, 4, NULL);
  out:
 	ring_buffer_nest_end(buffer);
 	return size;
 }
+EXPORT_SYMBOL_GPL(__trace_array_puts);
+
+/**
+ * __trace_puts - write a constant string into the trace buffer.
+ * @ip:	   The address of the caller
+ * @str:   The constant string to write
+ * @size:  The size of the string.
+ */
+int __trace_puts(unsigned long ip, const char *str, int size)
+{
+	return __trace_array_puts(&global_trace, ip, str, size);
+}
 EXPORT_SYMBOL_GPL(__trace_puts);
 
 /**

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