linux-kernel - [PATCH] bpf: Replace 0 with BPF

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Date:   Tue, 21 Jun 2022 23:19:23 -0400
From:   Simon wang <wangchuanguo@...pur.com>
To:     <ast@...nel.org>, <daniel@...earbox.net>, <andrii@...nel.org>
CC:     <netdev@...r.kernel.org>, <bpf@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Simon Wang <wangchuanguo@...pur.com>
Subject: [PATCH] bpf: Replace 0 with BPF_K

From: Simon Wang <wangchuanguo@...pur.com>

Enhance readability.

Signed-off-by: Simon Wang <wangchuanguo@...pur.com>
---
 kernel/bpf/verifier.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 2859901ffbe3..29060f15daab 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -9064,7 +9064,7 @@ static int check_alu_op(struct bpf_verifier_env *env, struct bpf_insn *insn)
 
 	if (opcode == BPF_END || opcode == BPF_NEG) {
 		if (opcode == BPF_NEG) {
-			if (BPF_SRC(insn->code) != 0 ||
+			if (BPF_SRC(insn->code) != BPF_K ||
 			    insn->src_reg != BPF_REG_0 ||
 			    insn->off != 0 || insn->imm != 0) {
 				verbose(env, "BPF_NEG uses reserved fields\n");
-- 
2.27.0