linux-kernel - [PATCH 5.18 696/879] perf build: Fix btf__load_from_kernel_by

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Message-Id: <20220607165023.049031152@linuxfoundation.org>
Date:   Tue,  7 Jun 2022 19:03:34 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Ian Rogers <irogers@...gle.com>,
        Ilya Leoshkevich <iii@...ux.ibm.com>,
        Sumanth Korikkar <sumanthk@...ux.ibm.com>,
        Sven Schnelle <svens@...ux.ibm.com>,
        Thomas Richter <tmricht@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.18 696/879] perf build: Fix btf__load_from_kernel_by_id() feature check

From: Jiri Olsa <jolsa@...nel.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@...nel.org>
Cc: Heiko Carstens <hca@...ux.ibm.com>
Cc: Ian Rogers <irogers@...gle.com>
Cc: Ilya Leoshkevich <iii@...ux.ibm.com>
Cc: Sumanth Korikkar <sumanthk@...ux.ibm.com>
Cc: Sven Schnelle <svens@...ux.ibm.com>
Cc: Thomas Richter <tmricht@...ux.ibm.com>
Cc: Vasily Gorbik <gor@...ux.ibm.com>
Link: http://lore.kernel.org/linux-perf-users/YozLKby7ITEtchC9@krava
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.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