tracing/probes: Move finding func-proto API and getting func-param API to trace_btf

Move generic function-proto find API and getting function parameter API
to BTF library code from trace_probe.c. This will avoid redundant efforts
on different feature.

Link: https://lore.kernel.org/all/169272155255.160970.719426926348706349.stgit@devnote2/

Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/kernel/trace/trace_btf.h b/kernel/trace/trace_btf.h
new file mode 100644
index 000000000000..98685e9a556c
--- /dev/null
+++ b/kernel/trace/trace_btf.h
@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <linux/btf.h>
+
+const struct btf_type *btf_find_func_proto(const char *func_name,
+					   struct btf **btf_p);
+const struct btf_param *btf_get_func_param(const struct btf_type *func_proto,
+					   s32 *nr);