linux-kernel - [PATCH bpf-next] bpf: Remove insn_buf[] declaration in inner block

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Date:   Thu, 18 Mar 2021 10:48:51 +0800
From:   Jianlin Lv <Jianlin.Lv@....com>
To:     bpf@...r.kernel.org
Cc:     ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
        kafai@...com, songliubraving@...com, yhs@...com,
        john.fastabend@...il.com, kpsingh@...nel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        Jianlin.Lv@....com, iecedge@...il.com
Subject: [PATCH bpf-next] bpf: Remove insn_buf[] declaration in inner block

Two insn_buf[16] variables are declared in the function, which act on
function scope and block scope respectively.
The statement in the inner blocks is redundant, so remove it.

Signed-off-by: Jianlin Lv <Jianlin.Lv@....com>
---
 kernel/bpf/verifier.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index f9096b049cd6..e26c5170c953 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -11899,7 +11899,6 @@ static int do_misc_fixups(struct bpf_verifier_env *env)
 		    insn->code == (BPF_ALU64 | BPF_SUB | BPF_X)) {
 			const u8 code_add = BPF_ALU64 | BPF_ADD | BPF_X;
 			const u8 code_sub = BPF_ALU64 | BPF_SUB | BPF_X;
-			struct bpf_insn insn_buf[16];
 			struct bpf_insn *patch = &insn_buf[0];
 			bool issrc, isneg;
 			u32 off_reg;
-- 
2.25.1