From patchwork Mon Feb 26 18:25:29 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Tyler Retzlaff X-Patchwork-Id: 137263 X-Patchwork-Delegate: thomas@monjalon.net Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id DF4B943BF3; Mon, 26 Feb 2024 19:29:02 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 3FEBF42EF9; Mon, 26 Feb 2024 19:26:34 +0100 (CET) Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by mails.dpdk.org (Postfix) with ESMTP id C9CC0402B2 for ; Mon, 26 Feb 2024 19:25:50 +0100 (CET) Received: by linux.microsoft.com (Postfix, from userid 1086) id 8C9E020B74D6; Mon, 26 Feb 2024 10:25:48 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 8C9E020B74D6 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1708971949; bh=b4odEvhtk2LoJd3Q9smqYOTxuAnmJvKa9AAlp58OeKE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DF5WK2PuRGOZiy9H0gQCTJLD5bsOATgRSVnE6PsPTzipslz3O5EXVBhp7/eqEm2BZ HSsehWI/4AOwx2FAsQeHNLXAd6S19d3oxPk0I00grOr1FkMUYgiqDFREEDKFJOqkQQ 9qtL+OWvY4E9TD+BGKfF8VKvqbSk7e8jb6o2xxKk= From: Tyler Retzlaff To: dev@dpdk.org Cc: Andrew Rybchenko , Bruce Richardson , Chengwen Feng , Cristian Dumitrescu , David Christensen , David Hunt , Ferruh Yigit , Honnappa Nagarahalli , Jasvinder Singh , Jerin Jacob , Kevin Laatz , Konstantin Ananyev , Min Zhou , Ruifeng Wang , Sameh Gobriel , Stanislaw Kardach , Thomas Monjalon , Vladimir Medvedkin , Yipeng Wang , Tyler Retzlaff Subject: [PATCH v6 22/39] rawdev: use C11 alignas Date: Mon, 26 Feb 2024 10:25:29 -0800 Message-Id: <1708971946-18231-23-git-send-email-roretzla@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1708971946-18231-1-git-send-email-roretzla@linux.microsoft.com> References: <1707873986-29352-1-git-send-email-roretzla@linux.microsoft.com> <1708971946-18231-1-git-send-email-roretzla@linux.microsoft.com> MIME-Version: 1.0 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org The current location used for __rte_aligned(a) for alignment of types and variables is not compatible with MSVC. There is only a single location accepted by both toolchains. For variables standard C11 offers alignas(a) supported by conformant compilers i.e. both MSVC and GCC. For types the standard offers no alignment facility that compatibly interoperates with C and C++ but may be achieved by relocating the placement of __rte_aligned(a) to the aforementioned location accepted by all currently supported toolchains. To allow alignment for both compilers do the following: * Move __rte_aligned from the end of {struct,union} definitions to be between {struct,union} and tag. The placement between {struct,union} and the tag allows the desired alignment to be imparted on the type regardless of the toolchain being used for all of GCC, LLVM, MSVC compilers building both C and C++. * Replace use of __rte_aligned(a) on variables/fields with alignas(a). Signed-off-by: Tyler Retzlaff Acked-by: Morten Brørup --- lib/rawdev/rte_rawdev.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/lib/rawdev/rte_rawdev.h b/lib/rawdev/rte_rawdev.h index 7d5764d..640037b 100644 --- a/lib/rawdev/rte_rawdev.h +++ b/lib/rawdev/rte_rawdev.h @@ -279,7 +279,7 @@ * It is a placeholder for PMD specific data, encapsulating only information * related to framework. */ -struct rte_rawdev { +struct __rte_cache_aligned rte_rawdev { /**< Socket ID where memory is allocated */ int socket_id; /**< Device ID for this instance */ @@ -300,7 +300,7 @@ struct rte_rawdev { rte_rawdev_obj_t dev_private; /**< Device name */ char name[RTE_RAWDEV_NAME_MAX_LEN]; -} __rte_cache_aligned; +}; /** @internal The pool of rte_rawdev structures. */ extern struct rte_rawdev *rte_rawdevs;