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

The ftrace_startup_subops() was in the wrong header, and both functions
were not defined on !CONFIG_DYNAMIC_FTRACE.

Link: https://lore.kernel.org/linux-trace-kernel/20240605202708.773583114@goodmis.org

Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Fixes: 5fccc7552ccbc ("ftrace: Add subops logic to allow one ops to manage many")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202406051524.a12JqLqx-lkp@intel.com/
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
 kernel/trace/ftrace_internal.h | 9 +++++++++
 kernel/trace/trace.h           | 1 -
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/kernel/trace/ftrace_internal.h b/kernel/trace/ftrace_internal.h
index bfba10c2fcf1..4bb1e881154a 100644
--- a/kernel/trace/ftrace_internal.h
+++ b/kernel/trace/ftrace_internal.h
@@ -15,6 +15,7 @@ extern struct ftrace_ops global_ops;
 int ftrace_startup(struct ftrace_ops *ops, int command);
 int ftrace_shutdown(struct ftrace_ops *ops, int command);
 int ftrace_ops_test(struct ftrace_ops *ops, unsigned long ip, void *regs);
+int ftrace_startup_subops(struct ftrace_ops *ops, struct ftrace_ops *subops, int command);
 int ftrace_shutdown_subops(struct ftrace_ops *ops, struct ftrace_ops *subops, int command);
 
 #else /* !CONFIG_DYNAMIC_FTRACE */
@@ -39,6 +40,14 @@ ftrace_ops_test(struct ftrace_ops *ops, unsigned long ip, void *regs)
 {
 	return 1;
 }
+static inline int ftrace_startup_subops(struct ftrace_ops *ops, struct ftrace_ops *subops, int command)
+{
+	return -EINVAL;
+}
+static inline int ftrace_shutdown_subops(struct ftrace_ops *ops, struct ftrace_ops *subops, int command)
+{
+	return -EINVAL;
+}
 #endif /* CONFIG_DYNAMIC_FTRACE */
 
 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index b37402e3f0c9..8783bebd0562 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -1186,7 +1186,6 @@ extern int ftrace_set_filter(struct ftrace_ops *ops, unsigned char *buf,
 			     int len, int reset);
 extern int ftrace_set_notrace(struct ftrace_ops *ops, unsigned char *buf,
 			      int len, int reset);
-extern int ftrace_startup_subops(struct ftrace_ops *ops, struct ftrace_ops *subops, int command);
 #else
 struct ftrace_func_command;
 
-- 
2.43.0