netdev - [PATCH bpf-next 1/4] riscv, bpf: Remove redundant ctx->offset initialization

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Date: Tue, 19 Sep 2023 11:57:08 +0800
From: Pu Lehui <pulehui@...weicloud.com>
To: bpf@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	netdev@...r.kernel.org
Cc: Björn Töpel <bjorn@...nel.org>,
	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>,
	Palmer Dabbelt <palmer@...belt.com>,
	Conor Dooley <conor@...nel.org>,
	Luke Nelson <luke.r.nels@...il.com>,
	Pu Lehui <pulehui@...wei.com>,
	Pu Lehui <pulehui@...weicloud.com>
Subject: [PATCH bpf-next 1/4] riscv, bpf: Remove redundant ctx->offset initialization

From: Pu Lehui <pulehui@...wei.com>

There is no gain in initializing ctx->offset and prev_insns, and
ctx->offset is already zero-initialized. Let's remove this code.

Signed-off-by: Pu Lehui <pulehui@...wei.com>
---
 arch/riscv/net/bpf_jit_core.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/arch/riscv/net/bpf_jit_core.c b/arch/riscv/net/bpf_jit_core.c
index 7a26a3e1c..dd00103a2 100644
--- a/arch/riscv/net/bpf_jit_core.c
+++ b/arch/riscv/net/bpf_jit_core.c
@@ -89,11 +89,6 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog)
 		goto out_offset;
 	}
 
-	for (i = 0; i < prog->len; i++) {
-		prev_ninsns += 32;
-		ctx->offset[i] = prev_ninsns;
-	}
-
 	for (i = 0; i < NR_JIT_ITERATIONS; i++) {
 		pass++;
 		ctx->ninsns = 0;
-- 
2.25.1