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From: Yuntao Wang <ytcoode@gmail.com>
To: bpf@vger.kernel.org
Cc: Alexei Starovoitov <ast@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Andrii Nakryiko <andrii@kernel.org>,
	Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
	Yonghong Song <yhs@fb.com>,
	John Fastabend <john.fastabend@gmail.com>,
	KP Singh <kpsingh@kernel.org>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	Yuntao Wang <ytcoode@gmail.com>
Subject: [PATCH bpf-next] libbpf: Simplify the find_elf_sec_sz() function
Date: Wed, 23 Feb 2022 16:52:44 +0800	[thread overview]
Message-ID: <20220223085244.3058118-1-ytcoode@gmail.com> (raw)

The check in the last return statement is unnecessary, we can just return
the ret variable.

But we can simplify the function further by returning 0 immediately if we
find the section size and -ENOENT otherwise.

Thus we can also remove the ret variable.

Signed-off-by: Yuntao Wang <ytcoode@gmail.com>
---
 tools/lib/bpf/libbpf.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 7e978feaf822..776b8e034d62 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -1374,22 +1374,20 @@ static bool bpf_map_type__is_map_in_map(enum bpf_map_type type)
 
 static int find_elf_sec_sz(const struct bpf_object *obj, const char *name, __u32 *size)
 {
-	int ret = -ENOENT;
 	Elf_Data *data;
 	Elf_Scn *scn;
 
-	*size = 0;
 	if (!name)
 		return -EINVAL;
 
 	scn = elf_sec_by_name(obj, name);
 	data = elf_sec_data(obj, scn);
 	if (data) {
-		ret = 0; /* found it */
 		*size = data->d_size;
+		return 0; /* found it */
 	}
 
-	return *size ? 0 : ret;
+	return -ENOENT;
 }
 
 static int find_elf_var_offset(const struct bpf_object *obj, const char *name, __u32 *off)
-- 
2.35.0.rc2


             reply	other threads:[~2022-02-23  8:53 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-23  8:52 Yuntao Wang [this message]
2022-02-23 23:10 ` [PATCH bpf-next] libbpf: Simplify the find_elf_sec_sz() function patchwork-bot+netdevbpf

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