From patchwork Tue Nov 29 13:45:58 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zheng Yejian X-Patchwork-Id: 13058580 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5FD16C46467 for ; Tue, 29 Nov 2022 13:45:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229773AbiK2NpX (ORCPT ); Tue, 29 Nov 2022 08:45:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54472 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229650AbiK2NpW (ORCPT ); Tue, 29 Nov 2022 08:45:22 -0500 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 23525B861; Tue, 29 Nov 2022 05:45:20 -0800 (PST) Received: from dggpeml500021.china.huawei.com (unknown [172.30.72.54]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4NM3VH39XlzmWJB; Tue, 29 Nov 2022 21:44:39 +0800 (CST) Received: from dggpeml100012.china.huawei.com (7.185.36.121) by dggpeml500021.china.huawei.com (7.185.36.21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Tue, 29 Nov 2022 21:45:18 +0800 Received: from localhost.localdomain (10.67.175.61) by dggpeml100012.china.huawei.com (7.185.36.121) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Tue, 29 Nov 2022 21:45:18 +0800 From: Zheng Yejian To: , , , , , , , , , , , , , , CC: Subject: [PATCH bpf] bpf, docs: Correct the example of BPF_XOR Date: Tue, 29 Nov 2022 21:45:58 +0800 Message-ID: <20221129134558.2757043-1-zhengyejian1@huawei.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Originating-IP: [10.67.175.61] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To dggpeml100012.china.huawei.com (7.185.36.121) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net Refer to description of BPF_XOR, dst_reg should be used but not src_reg in the examples. Signed-off-by: Zheng Yejian --- Documentation/bpf/instruction-set.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/Documentation/bpf/instruction-set.rst b/Documentation/bpf/instruction-set.rst index 5d798437dad4..e672d5ec6cc7 100644 --- a/Documentation/bpf/instruction-set.rst +++ b/Documentation/bpf/instruction-set.rst @@ -122,11 +122,11 @@ BPF_END 0xd0 byte swap operations (see `Byte swap instructions`_ below) ``BPF_XOR | BPF_K | BPF_ALU`` means:: - src_reg = (u32) src_reg ^ (u32) imm32 + dst_reg = (u32) dst_reg ^ (u32) imm32 ``BPF_XOR | BPF_K | BPF_ALU64`` means:: - src_reg = src_reg ^ imm32 + dst_reg = dst_reg ^ imm32 Byte swap instructions