linux-kernel - [PATCH] bpf/tests: Use struct

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Message-Id: <20230531043251.989312-1-suhui@nfschina.com>
Date:   Wed, 31 May 2023 12:32:51 +0800
From:   Su Hui <suhui@...china.com>
To:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <martin.lau@...ux.dev>,
        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>
Cc:     bpf@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org, Su Hui <suhui@...china.com>
Subject: [PATCH] bpf/tests: Use struct_size()

Use struct_size() instead of hand writing it.
This is less verbose and more informative.

Signed-off-by: Su Hui <suhui@...china.com>
---
 lib/test_bpf.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/lib/test_bpf.c b/lib/test_bpf.c
index ade9ac672adb..fa0833410ac1 100644
--- a/lib/test_bpf.c
+++ b/lib/test_bpf.c
@@ -15056,8 +15056,7 @@ static __init int prepare_tail_call_tests(struct bpf_array **pprogs)
 	int which, err;
 
 	/* Allocate the table of programs to be used for tall calls */
-	progs = kzalloc(sizeof(*progs) + (ntests + 1) * sizeof(progs->ptrs[0]),
-			GFP_KERNEL);
+	progs = kzalloc(struct_size(progs, ptrs, ntests + 1), GFP_KERNEL);
 	if (!progs)
 		goto out_nomem;
 
-- 
2.30.2