From nobody Sun Jun 28 10:34:48 2026 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 1A756C433F5 for ; Thu, 10 Feb 2022 03:14:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232345AbiBJDOy (ORCPT ); Wed, 9 Feb 2022 22:14:54 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:49104 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229738AbiBJDOv (ORCPT ); Wed, 9 Feb 2022 22:14:51 -0500 Received: from m1325.mail.163.com (m1325.mail.163.com [220.181.13.25]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id D73731EAE1 for ; Wed, 9 Feb 2022 19:14:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=Date:From:Subject:MIME-Version:Message-ID; bh=+gO8T 07vX7kDCL0Yg8uMsti+0sKsRe0cSU2LfwKZ0vU=; b=UjXOxjAhTRhvv/HWfi8Sl o93ECTeMd+ltLLHXROBlcE3guGUxSxzRdpQN7vry/EsObreJXuGWIuBDuDTa74h+ fY92gdsqc6VBW0R2MWlARz5XivAnXj1LnOdB4OSo8RKK7XWYuAnVRNvKQrYwk09W evQb17++Lb3m0EPPH1dGw4= Received: from chengchaohang$163.com ( [114.251.148.34] ) by ajax-webmail-wmsvr25 (Coremail) ; Thu, 10 Feb 2022 11:13:58 +0800 (CST) X-Originating-IP: [114.251.148.34] Date: Thu, 10 Feb 2022 11:13:58 +0800 (CST) From: "chaohang.cheng" To: leon@kernel.org, maorg@nvidia.com, jgg@ziepe.ca, logang@deltatee.com, thunder.leizhen@huawei.com Cc: linux-kernel@vger.kernel.org Subject: [PATCH] lib/scatterlist: Provide scatterlist hexdump. X-Priority: 3 X-Mailer: Coremail Webmail Server Version XT5.0.13 build 20210622(1d4788a8) Copyright (c) 2002-2022 www.mailtech.cn 163com Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Message-ID: <79b66b0e.24c5.17ee19f9409.Coremail.chengchaohang@163.com> X-Coremail-Locale: zh_CN X-CM-TRANSID: GcGowACnr+P3ggRi7AMmAA--.12311W X-CM-SenderInfo: xfkh0wpfkd0xxdqjqiywtou0bp/xtbBEw+ivF3l-1bNiwABsU X-Coremail-Antispam: 1U5529EdanIXcx71UUUUU7vcSsGvfC2KfnxnUU== Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: "chaohang.cheng" A scatterlist hexdump is essential during debug, sometimes. Signed-off-by: chaohang.cheng --- include/linux/scatterlist.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/include/linux/scatterlist.h b/include/linux/scatterlist.h index 7ff9d6386c12..ef8ecaac0016 100644 --- a/include/linux/scatterlist.h +++ b/include/linux/scatterlist.h @@ -563,4 +563,21 @@ bool sg_miter_skip(struct sg_mapping_iter *miter, off_= t offset); bool sg_miter_next(struct sg_mapping_iter *miter); void sg_miter_stop(struct sg_mapping_iter *miter); =20 +/* + * Hexdump scatterlist + * + * @sg: struct scatterlist* . + * it stands for the head of a scatterlist . + * + * note: print_hex_dump_debug is a dynamic debug . + * + */ +#define SG_HEXDUMP(sg) \ +do { \ + struct scatterlist *sg_tmp =3D NULL; \ + for (sg_tmp =3D sg; sg_tmp; sg_tmp =3D sg_next(sg_tmp)) \ + print_hex_dump_debug("", DUMP_PREFIX_OFFSET, \ + 16, 1, sg_virt(sg_tmp), sg_tmp->length, true); \ +} while (0) + #endif /* _LINUX_SCATTERLIST_H */ --=20 2.25.1