From 0b9a7f0de847d945bc5dd83961136e04d6c890ec Mon Sep 17 00:00:00 2001
From: Jerome Marchand <jmarchan@redhat.com>
Date: Wed, 1 Jul 2020 17:52:51 +0200
Subject: [PATCH] Reinstate bpf_detach_kfunc

It doesn't do anything, but bpftrace still calls it.

---
 src/cc/libbpf.c | 7 +++++++
 src/cc/libbpf.h | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/src/cc/libbpf.c b/src/cc/libbpf.c
index 010d1222..4c43218f 100644
--- a/src/cc/libbpf.c
+++ b/src/cc/libbpf.c
@@ -1186,6 +1186,13 @@ bool bpf_has_kernel_btf(void)
   return libbpf_find_vmlinux_btf_id("bpf_prog_put", 0) > 0;
 }
 
+int bpf_detach_kfunc(int prog_fd, char *func)
+{
+  UNUSED(prog_fd);
+  UNUSED(func);
+  return 0;
+}
+
 int bpf_attach_kfunc(int prog_fd)
 {
   int ret;
diff --git a/src/cc/libbpf.h b/src/cc/libbpf.h
index 61471b5b..bcae5c99 100644
--- a/src/cc/libbpf.h
+++ b/src/cc/libbpf.h
@@ -94,6 +94,8 @@ int bpf_detach_tracepoint(const char *tp_category, const char *tp_name);
 
 int bpf_attach_raw_tracepoint(int progfd, const char *tp_name);
 
+  int bpf_detach_kfunc(int prog_fd, char *func);
+
 int bpf_attach_kfunc(int prog_fd);
 
 int bpf_attach_lsm(int prog_fd);
-- 
2.25.4