From: Haiyue Wang <haiyue.wang@intel.com>
To: bpf@vger.kernel.org
Cc: Haiyue Wang <haiyue.wang@intel.com>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>,
Martin KaFai Lau <martin.lau@linux.dev>,
Song Liu <song@kernel.org>, Yonghong Song <yhs@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@kernel.org>,
Stanislav Fomichev <sdf@google.com>, Hao Luo <haoluo@google.com>,
Jiri Olsa <jolsa@kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
netdev@vger.kernel.org (open list:BPF [NETWORKING] (tc BPF,
sock_addr)), linux-kernel@vger.kernel.org (open list)
Subject: [PATCH bpf-next v1] bpf: Remove the unnecessary insn buffer comparison
Date: Sun, 8 Jan 2023 23:12:57 +0800 [thread overview]
Message-ID: <20230108151258.96570-1-haiyue.wang@intel.com> (raw)
The variable 'insn' is initialized to 'insn_buf' without being changed,
only some helper macros are defined, so the insn buffer comparison is
unnecessary, just remove it.
Signed-off-by: Haiyue Wang <haiyue.wang@intel.com>
---
net/core/filter.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/net/core/filter.c b/net/core/filter.c
index ab811293ae5d..d9befa6ba04e 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -6847,9 +6847,6 @@ u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
FIELD)); \
} while (0)
- if (insn > insn_buf)
- return insn - insn_buf;
-
switch (si->off) {
case offsetof(struct bpf_tcp_sock, rtt_min):
BUILD_BUG_ON(sizeof_field(struct tcp_sock, rtt_min) !=
@@ -10147,9 +10144,6 @@ static u32 sock_ops_convert_ctx_access(enum bpf_access_type type,
SOCK_OPS_GET_FIELD(BPF_FIELD, OBJ_FIELD, OBJ); \
} while (0)
- if (insn > insn_buf)
- return insn - insn_buf;
-
switch (si->off) {
case offsetof(struct bpf_sock_ops, op):
*insn++ = BPF_LDX_MEM(BPF_FIELD_SIZEOF(struct bpf_sock_ops_kern,
--
2.39.0
next reply other threads:[~2023-01-08 15:11 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-08 15:12 Haiyue Wang [this message]
2023-01-09 17:39 ` [PATCH bpf-next v1] bpf: Remove the unnecessary insn buffer comparison sdf
2023-01-09 23:52 ` Wang, Haiyue
2023-01-10 22:20 ` patchwork-bot+netdevbpf
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