From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F0EECC2BA19 for ; Mon, 13 Apr 2020 11:35:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D84732073E for ; Mon, 13 Apr 2020 11:35:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729046AbgDMLfM (ORCPT ); Mon, 13 Apr 2020 07:35:12 -0400 Received: from szxga07-in.huawei.com ([45.249.212.35]:58814 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728960AbgDMLfL (ORCPT ); Mon, 13 Apr 2020 07:35:11 -0400 Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id AD1E02C3D16DCE273A7E; Mon, 13 Apr 2020 19:35:07 +0800 (CST) Received: from localhost.localdomain.localdomain (10.175.113.25) by DGGEMS411-HUB.china.huawei.com (10.3.19.211) with Microsoft SMTP Server id 14.3.487.0; Mon, 13 Apr 2020 19:35:06 +0800 From: Mao Wenan To: , , , , , , , CC: , , , Subject: [PATCH -next] bpf: remove set but not used variable 'dst_known' Date: Mon, 13 Apr 2020 19:37:03 +0800 Message-ID: <20200413113703.194287-1-maowenan@huawei.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-Originating-IP: [10.175.113.25] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Fixes gcc '-Wunused-but-set-variable' warning: kernel/bpf/verifier.c:5603:18: warning: variable ‘dst_known’ set but not used [-Wunused-but-set-variable] It is not used since commit f1174f77b50c ("bpf/verifier: rework value tracking") Signed-off-by: Mao Wenan --- kernel/bpf/verifier.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index 04c6630cc18f..c9f50969a689 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -5600,7 +5600,7 @@ static int adjust_scalar_min_max_vals(struct bpf_verifier_env *env, { struct bpf_reg_state *regs = cur_regs(env); u8 opcode = BPF_OP(insn->code); - bool src_known, dst_known; + bool src_known; s64 smin_val, smax_val; u64 umin_val, umax_val; s32 s32_min_val, s32_max_val; @@ -5622,7 +5622,6 @@ static int adjust_scalar_min_max_vals(struct bpf_verifier_env *env, if (alu32) { src_known = tnum_subreg_is_const(src_reg.var_off); - dst_known = tnum_subreg_is_const(dst_reg->var_off); if ((src_known && (s32_min_val != s32_max_val || u32_min_val != u32_max_val)) || s32_min_val > s32_max_val || u32_min_val > u32_max_val) { @@ -5634,7 +5633,6 @@ static int adjust_scalar_min_max_vals(struct bpf_verifier_env *env, } } else { src_known = tnum_is_const(src_reg.var_off); - dst_known = tnum_is_const(dst_reg->var_off); if ((src_known && (smin_val != smax_val || umin_val != umax_val)) || smin_val > smax_val || umin_val > umax_val) { -- 2.17.1