From patchwork Wed Feb 28 20:41:37 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 13575966 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id DFA59C47DD9 for ; Wed, 28 Feb 2024 20:50:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=95A0PCGsE7RX7t8Sy5ZgWPvyVOYIilVK8y6AbLyGPrg=; b=lsHrFBhIxoZcF6 x0wCwQ0WvpbABjU7MkZoHa1czX9pljrnZSfUZkOQtNWt+SLuc642vj2CJeD1y+M+7AA73O+P2LjM7 Zohx265kXAy5EYC/vSxd8jC+QJVtKDvA5F5W9JALSc75FuEimuC3uNf7iVMJqODZ5J7n1/EmpRZXb ypk9qXcWTSs6YKn5GE9255bcGwQ03HY9B3VrJ0FQA3poNHfeLcvSpaSFUTrF+C3BIaTfRpM08ktIV OZVpLPwxdrzGkQDd9hCaLGbRKqfdSSBwEv3hXQZxJp0A+EjMaAJcJT7zZsWLJ4TOof0BISWjR2oi6 tXmYSJ6+8hUPe7oFxPDg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rfQsJ-0000000AtFl-2eUx; Wed, 28 Feb 2024 20:49:59 +0000 Received: from mgamail.intel.com ([192.198.163.17]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rfQs7-0000000At7z-1U8u for linux-arm-kernel@lists.infradead.org; Wed, 28 Feb 2024 20:49:48 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1709153387; x=1740689387; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=F4b2geX9W5KhXMqEu52b1/d3qPI5zOp6cxLtiYLUnNE=; b=F/gkgw7YM9B+7loM2W0xpqJ6jU57HuXvleaDALSY3xUIkht9c2Uqq2if 1aCwAGj6DK5nwW7qgwzqB/VqHjhle1XB9yMxqu3/x0eiADWoVNNu3rTpm sqoeXt2/sj8R2OYBn27EIOl0d0F4FRN4FPoIAzAPHYac+E89ShrkltgIU qsOAujLc7sR2VoDzzr82BeHQTz/SyFzcQ/lP+G4RAYwNP7P4w7NKvp/bO 4mmqY/mOZWHCxcaXViIKhC7OrKpdGUGCmoYE+V2Yy6ofYV+v+DyXCBKDF cQ8fJYmxhMjhrrUIzP1S5rmCy1JB/eiFzFT0FbhCv7wz0DJ7XGyPzEN2Y g==; X-IronPort-AV: E=McAfee;i="6600,9927,10998"; a="3428763" X-IronPort-AV: E=Sophos;i="6.06,191,1705392000"; d="scan'208";a="3428763" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmvoesa111.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Feb 2024 12:49:46 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10998"; a="937034664" X-IronPort-AV: E=Sophos;i="6.06,191,1705392000"; d="scan'208";a="937034664" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga001.fm.intel.com with ESMTP; 28 Feb 2024 12:49:41 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id 5F749631; Wed, 28 Feb 2024 22:49:34 +0200 (EET) From: Andy Shevchenko To: Vinod Koul , Linus Walleij , Jonathan Cameron , Andy Shevchenko , Mark Brown , Kees Cook , linux-arm-kernel@lists.infradead.org, dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, linux-spi@vger.kernel.org, netdev@vger.kernel.org, linux-hardening@vger.kernel.org Cc: Jonathan Cameron , Lars-Peter Clausen , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , "Gustavo A. R. Silva" Subject: [PATCH v4 7/8] net-device: Use new helpers from overflow.h in netdevice APIs Date: Wed, 28 Feb 2024 22:41:37 +0200 Message-ID: <20240228204919.3680786-8-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.43.0.rc1.1.gbec44491f096 In-Reply-To: <20240228204919.3680786-1-andriy.shevchenko@linux.intel.com> References: <20240228204919.3680786-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240228_124947_479103_D511F953 X-CRM114-Status: GOOD ( 15.23 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org We have two new helpers struct_size_with_data() and struct_data_pointer() that we can utilize in alloc_netdev_mqs() and netdev_priv(). Do it so. Signed-off-by: Andy Shevchenko --- include/linux/netdevice.h | 3 ++- net/core/dev.c | 10 +++++----- 2 files changed, 7 insertions(+), 6 deletions(-) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index c41019f34179..d046dca18854 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -25,6 +25,7 @@ #include #include #include +#include #include #include #include @@ -2668,7 +2669,7 @@ void dev_net_set(struct net_device *dev, struct net *net) */ static inline void *netdev_priv(const struct net_device *dev) { - return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); + return struct_data_pointer(dev, NETDEV_ALIGN); } /* Set the sysfs physical device reference for the network logical device diff --git a/net/core/dev.c b/net/core/dev.c index 69c3e3613372..80b765bb8ba2 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -10859,12 +10859,12 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, return NULL; } - alloc_size = sizeof(struct net_device); - if (sizeof_priv) { + if (sizeof_priv) /* ensure 32-byte alignment of private area */ - alloc_size = ALIGN(alloc_size, NETDEV_ALIGN); - alloc_size += sizeof_priv; - } + alloc_size = struct_size_with_data(p, NETDEV_ALIGN, sizeof_priv); + else + alloc_size = sizeof(struct net_device); + /* ensure 32-byte alignment of whole construct */ alloc_size += NETDEV_ALIGN - 1;