1 files changed, 20 insertions, 1 deletions
diff --git a/include/linux/ring_buffer.h b/include/linux/ring_buffer.h
index 96d2140b471e..17fbb7855295 100644
--- a/include/linux/ring_buffer.h
+++ b/include/linux/ring_buffer.h
@@ -89,6 +89,14 @@ void ring_buffer_discard_commit(struct trace_buffer *buffer,
 struct trace_buffer *
 __ring_buffer_alloc(unsigned long size, unsigned flags, struct lock_class_key *key);
 
+struct trace_buffer *__ring_buffer_alloc_range(unsigned long size, unsigned flags,
+					       int order, unsigned long start,
+					       unsigned long range_size,
+					       struct lock_class_key *key);
+
+bool ring_buffer_last_boot_delta(struct trace_buffer *buffer, long *text,
+				 long *data);
+
 /*
  * Because the ring buffer is generic, if other users of the ring buffer get
  * traced by ftrace, it can produce lockdep warnings. We need to keep each
@@ -100,6 +108,18 @@ __ring_buffer_alloc(unsigned long size, unsigned flags, struct lock_class_key *k
 	__ring_buffer_alloc((size), (flags), &__key);	\
 })
 
+/*
+ * Because the ring buffer is generic, if other users of the ring buffer get
+ * traced by ftrace, it can produce lockdep warnings. We need to keep each
+ * ring buffer's lock class separate.
+ */
+#define ring_buffer_alloc_range(size, flags, order, start, range_size)	\
+({									\
+	static struct lock_class_key __key;				\
+	__ring_buffer_alloc_range((size), (flags), (order), (start),	\
+				  (range_size), &__key);		\
+})
+
 typedef bool (*ring_buffer_cond_fn)(void *data);
 int ring_buffer_wait(struct trace_buffer *buffer, int cpu, int full,
 		     ring_buffer_cond_fn cond, void *data);
@@ -193,7 +213,6 @@ void ring_buffer_set_clock(struct trace_buffer *buffer,
 void ring_buffer_set_time_stamp_abs(struct trace_buffer *buffer, bool abs);
 bool ring_buffer_time_stamp_abs(struct trace_buffer *buffer);
 
-size_t ring_buffer_nr_pages(struct trace_buffer *buffer, int cpu);
 size_t ring_buffer_nr_dirty_pages(struct trace_buffer *buffer, int cpu);
 
 struct buffer_data_read_page;