[PATCH -next 1/2] function_graph: Add kernel-doc comments for ftrace_graph_ret_addr() function

[Yang Li <yang.lee@linux.alibaba.com>]

Added kernel-doc comments for the ftrace_graph_ret_addr() function to
improve code documentation and readability.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=9299
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
---
 kernel/trace/fgraph.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kernel/trace/fgraph.c b/kernel/trace/fgraph.c
index a13551a023aa..4ad33e4cb8da 100644
--- a/kernel/trace/fgraph.c
+++ b/kernel/trace/fgraph.c
@@ -872,6 +872,12 @@ ftrace_graph_get_ret_stack(struct task_struct *task, int idx)
 /**
  * ftrace_graph_ret_addr - convert a potentially modified stack return address
  *			   to its original value
+ * @task: pointer to the task_struct of the task being examined
+ * @idx: pointer to a state variable, should be initialized to zero
+ *	 before the first call
+ * @ret: the current return address found on the stack
+ * @retp: pointer to the return address on the stack, ignored if
+ *	  HAVE_FUNCTION_GRAPH_RET_ADDR_PTR is not defined
  *
  * This function can be called by stack unwinding code to convert a found stack
  * return address ('ret') to its original value, in case the function graph
-- 
2.20.1.7.g153144c