[PATCH v1 bpf-next 04/18] selftests/bpf: Declare bpf_fentry_test1 in tracing tests

[Anton Protopopov <a.s.protopopov@gmail.com>]

bpftool puts bpf_fentry_test1 into vmlinux.h only because the function
is in a kfunc set, which exists to let fmod_ret programs attach to it.
A later patch moves it to an fmod_ret set, which does not make a
function a kfunc, and the declaration disappears.

The tests only compare its address. Declare it explicitly, as
get_func_ip_test.c does. The declaration matches the one in vmlinux.h,
so it builds both before and after.

Signed-off-by: Anton Protopopov <a.s.protopopov@gmail.com>
---
 tools/testing/selftests/bpf/progs/fsession_test.c             | 2 ++
 tools/testing/selftests/bpf/progs/get_func_ip_fsession_test.c | 2 ++
 tools/testing/selftests/bpf/progs/tracing_multi_check.c       | 2 +-
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/progs/fsession_test.c b/tools/testing/selftests/bpf/progs/fsession_test.c
index 86e8a2fe467e..4295f6a78dd1 100644
--- a/tools/testing/selftests/bpf/progs/fsession_test.c
+++ b/tools/testing/selftests/bpf/progs/fsession_test.c
@@ -4,6 +4,8 @@
 #include <bpf/bpf_helpers.h>
 #include <bpf/bpf_tracing.h>
 
+extern int bpf_fentry_test1(int a) __ksym;
+
 char _license[] SEC("license") = "GPL";
 
 __u64 test1_entry_result = 0;
diff --git a/tools/testing/selftests/bpf/progs/get_func_ip_fsession_test.c b/tools/testing/selftests/bpf/progs/get_func_ip_fsession_test.c
index bbeea0d512e3..51a7f605f9c5 100644
--- a/tools/testing/selftests/bpf/progs/get_func_ip_fsession_test.c
+++ b/tools/testing/selftests/bpf/progs/get_func_ip_fsession_test.c
@@ -3,6 +3,8 @@
 #include <bpf/bpf_helpers.h>
 #include <bpf/bpf_tracing.h>
 
+extern int bpf_fentry_test1(int a) __ksym;
+
 char _license[] SEC("license") = "GPL";
 
 __u64 test1_entry_result = 0;
diff --git a/tools/testing/selftests/bpf/progs/tracing_multi_check.c b/tools/testing/selftests/bpf/progs/tracing_multi_check.c
index b2959ba71179..9b008ecd6565 100644
--- a/tools/testing/selftests/bpf/progs/tracing_multi_check.c
+++ b/tools/testing/selftests/bpf/progs/tracing_multi_check.c
@@ -8,7 +8,7 @@ char _license[] SEC("license") = "GPL";
 int pid = 0;
 bool test_cookies = false;
 
-/* bpf_fentry_test1 is exported as kfunc via vmlinux.h */
+extern int bpf_fentry_test1(int a) __ksym;
 extern const void bpf_fentry_test2 __ksym;
 extern const void bpf_fentry_test3 __ksym;
 extern const void bpf_fentry_test4 __ksym;
-- 
2.43.0