[PATCH 5.18 696/879] perf build: Fix btf__load_from_kernel_by_id() feature check

Greg Kroah-Hartman
2022-06-08T00:38:44Z

From: Jiri Olsa <jolsa@kernel.org>

[ Upstream commit 73534617dfa3c4cd95fe5ffaeff5315e9ffc2de6 ]

The btf__load_from_kernel_by_id() only takes one arg, not two.

Committer notes:

I tested it just with an older libbpf, one where
btf__load_from_kernel_by_id() wasn't introduced yet.

A test with a newer dynamic libbpf would fail because the
btf__load_from_kernel_by_id() is there, but takes just one arg.

Fixes: 0ae065a5d265bc5a ("perf build: Fix check for btf__load_from_kernel_by_id() in libbpf")
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ilya Leoshkevich <iii@linux.ibm.com>
Cc: Sumanth Korikkar <sumanthk@linux.ibm.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Link: http://lore.kernel.org/linux-perf-users/YozLKby7ITEtchC9@krava
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../build/feature/test-libbpf-btf__load_from_kernel_by_id.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/build/feature/test-libbpf-btf__load_from_kernel_by_id.c b/tools/build/feature/test-libbpf-btf__load_from_kernel_by_id.c
index f7c084428735..a17647f7d5a4 100644
--- a/tools/build/feature/test-libbpf-btf__load_from_kernel_by_id.c
+++ b/tools/build/feature/test-libbpf-btf__load_from_kernel_by_id.c
@@ -1,7 +1,8 @@
// SPDX-License-Identifier: GPL-2.0
-#include <bpf/libbpf.h>
+#include <bpf/btf.h>

int main(void)
{
- return btf__load_from_kernel_by_id(20151128, NULL);
+ btf__load_from_kernel_by_id(20151128);
+ return 0;
}
--
2.35.1