From nobody Mon Apr 6 23:08:51 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 1B021C6FA83 for ; Thu, 1 Sep 2022 22:21:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235213AbiIAWVL (ORCPT ); Thu, 1 Sep 2022 18:21:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46822 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235093AbiIAWUn (ORCPT ); Thu, 1 Sep 2022 18:20:43 -0400 Received: from mail.3ffe.de (0001.3ffe.de [159.69.201.130]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 55043A1A63; Thu, 1 Sep 2022 15:19:10 -0700 (PDT) Received: from mwalle01.kontron.local. (unknown [213.135.10.150]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mail.3ffe.de (Postfix) with ESMTPSA id DCC132010; Fri, 2 Sep 2022 00:19:07 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2022082101; t=1662070748; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=wdjSL3TiHg3qFpviZsE8DP2S5RzCHH4DKzPfG+JMhKc=; b=MD31gvVbYo7tM0nTjHtSpj+l08HOGGoGiWF6xKQiUjq68ekoSRL++w3Q4T1lJIaMTgX8hF Dn5laG5VT2yoyNqpvBuuHnH9UOkfphV5B+jn0SWPSEQtuzaNQTUyx3LpNFWg6BdLDALDWL A35GGTTMPmhrr+ZwOnXXjVOnOkOGIPwDvNC8lubbocR1C/eu341/xSUSvXzs9SI37y9Icj LdLR/xMA+hRltry8fFAP7sKWHQhGLw1QJFAlpuMEyC9B7I5guVEGlhF+7zdY9BWGl04QW8 QVlnsB1qZcsPx+iuszGFE1ezn0hgNlyShJPek5X4+3wRG6nVgHKYv+2Kp27+cw== From: Michael Walle To: Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Rob Herring , Krzysztof Kozlowski , Srinivas Kandagatla , Shawn Guo , Li Yang , =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= , Frank Rowand Cc: linux-mtd@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Ahmad Fatoum , Philipp Zabel , Michael Walle , Andrew Lunn , Jakub Kicinski Subject: [PATCH v2 01/20] net: add helper eth_addr_add() Date: Fri, 2 Sep 2022 00:18:38 +0200 Message-Id: <20220901221857.2600340-2-michael@walle.cc> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220901221857.2600340-1-michael@walle.cc> References: <20220901221857.2600340-1-michael@walle.cc> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Spam: Yes Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add a helper to add an offset to a ethernet address. This comes in handy if you have a base ethernet address for multiple interfaces. Signed-off-by: Michael Walle Reviewed-by: Andrew Lunn Acked-by: Jakub Kicinski --- changes since v1: - none include/linux/etherdevice.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h index a541f0c4f146..f144cadbe99d 100644 --- a/include/linux/etherdevice.h +++ b/include/linux/etherdevice.h @@ -507,6 +507,20 @@ static inline void eth_addr_inc(u8 *addr) u64_to_ether_addr(u, addr); } =20 +/** + * eth_addr_add() - Add (or subtract) and offset to/from the given MAC add= ress. + * + * @offset: Offset to add. + * @addr: Pointer to a six-byte array containing Ethernet address to incre= ment. + */ +static inline void eth_addr_add(u8 *addr, long offset) +{ + u64 u =3D ether_addr_to_u64(addr); + + u +=3D offset; + u64_to_ether_addr(u, addr); +} + /** * is_etherdev_addr - Tell if given Ethernet address belongs to the device. * @dev: Pointer to a device structure --=20 2.30.2