diff --git a/arch/x86/events/intel/pt.c b/arch/x86/events/intel/pt.c
index 42a55794004a7a..8e2a12235e62c2 100644
--- a/arch/x86/events/intel/pt.c
+++ b/arch/x86/events/intel/pt.c
@@ -736,6 +736,7 @@ static bool topa_table_full(struct topa *topa)
 /**
  * topa_insert_pages() - create a list of ToPA tables
  * @buf:	PT buffer being initialized.
+ * @cpu:	CPU on which to allocate.
  * @gfp:	Allocation flags.
  *
  * This initializes a list of ToPA tables with entries from
@@ -1207,8 +1208,11 @@ static void pt_buffer_fini_topa(struct pt_buffer *buf)
 /**
  * pt_buffer_init_topa() - initialize ToPA table for pt buffer
  * @buf:	PT buffer.
- * @size:	Total size of all regions within this ToPA.
+ * @cpu:	CPU on which to allocate.
+ * @nr_pages:	No. of pages to allocate.
  * @gfp:	Allocation flags.
+ *
+ * Return:	0 on success or error code.
  */
 static int pt_buffer_init_topa(struct pt_buffer *buf, int cpu,
 			       unsigned long nr_pages, gfp_t gfp)
@@ -1281,7 +1285,7 @@ static int pt_buffer_try_single(struct pt_buffer *buf, int nr_pages)
 
 /**
  * pt_buffer_setup_aux() - set up topa tables for a PT buffer
- * @cpu:	Cpu on which to allocate, -1 means current.
+ * @event:	Performance event
  * @pages:	Array of pointers to buffer pages passed from perf core.
  * @nr_pages:	Number of pages in the buffer.
  * @snapshot:	If this is a snapshot/overwrite counter.