On Wed,  7 Feb 2024 00:09:21 +0900
"Masami Hiramatsu (Google)" [off-list ref] wrote:

From: Steven Rostedt (VMware) <rostedt@goodmis.org>

Pass the fgraph_ops structure to the function graph callbacks. This will
allow callbacks to add a descriptor to a fgraph_ops private field that wil
be added in the future and use it for the callbacks. This will be useful
when more than one callback can be registered to the function graph tracer.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
---
 Changes in v2:
  - cleanup to set argument name on function prototype.
---

This patch fails to compile without this change:

diff --git a/kernel/trace/fgraph.c b/kernel/trace/fgraph.c
index e35a941a5af3..47b461b1cf7e 100644
--- a/kernel/trace/fgraph.c
+++ b/kernel/trace/fgraph.c

@@ -381,7 +381,7 @@ int function_graph_enter(unsigned long ret, unsigned long func,
 		if (gops == &fgraph_stub)
 			continue;
 
-		if (gops->entryfunc(&trace))
+		if (gops->entryfunc(&trace, gops))
 			bitmap |= BIT(i);
 	}
 


-- Steve