linux-kernel - [PATCH v2 bpf-next 3/4] bpf: make an argument const in the bpf_map_sum_elem

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Message-Id: <20230719092952.41202-4-aspsk@isovalent.com>
Date:   Wed, 19 Jul 2023 09:29:51 +0000
From:   Anton Protopopov <aspsk@...valent.com>
To:     Martin KaFai Lau <martin.lau@...ux.dev>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Song Liu <song@...nel.org>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
        Mykola Lysenko <mykolal@...com>, Shuah Khan <shuah@...nel.org>,
        Hou Tao <houtao1@...wei.com>, Joe Stringer <joe@...valent.com>,
        Anton Protopopov <aspsk@...valent.com>, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: [PATCH v2 bpf-next 3/4] bpf: make an argument const in the bpf_map_sum_elem_count kfunc

We use the map pointer only to read the counter values, no locking
involved, so mark the argument as const.

Signed-off-by: Anton Protopopov <aspsk@...valent.com>
---
 kernel/bpf/map_iter.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/bpf/map_iter.c b/kernel/bpf/map_iter.c
index b67996147895..011adb41858e 100644
--- a/kernel/bpf/map_iter.c
+++ b/kernel/bpf/map_iter.c
@@ -197,7 +197,7 @@ __diag_push();
 __diag_ignore_all("-Wmissing-prototypes",
 		  "Global functions as their definitions will be in vmlinux BTF");
 
-__bpf_kfunc s64 bpf_map_sum_elem_count(struct bpf_map *map)
+__bpf_kfunc s64 bpf_map_sum_elem_count(const struct bpf_map *map)
 {
 	s64 *pcount;
 	s64 ret = 0;
-- 
2.34.1