From patchwork Mon Mar 4 17:52:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Tyler Retzlaff X-Patchwork-Id: 137931 X-Patchwork-Delegate: david.marchand@redhat.com 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 AED1743B9B; Mon, 4 Mar 2024 18:54:53 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id DE50B42E48; Mon, 4 Mar 2024 18:53:13 +0100 (CET) Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by mails.dpdk.org (Postfix) with ESMTP id 932264027D for ; Mon, 4 Mar 2024 18:52:52 +0100 (CET) Received: by linux.microsoft.com (Postfix, from userid 1086) id 61A7120B74D7; Mon, 4 Mar 2024 09:52:50 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 61A7120B74D7 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1709574771; bh=WUtFr2J1XrLMYfkXz4OXQBA06hGf9LcUjUZL8CYXShI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KSekI70P5ViVcE2XXrBerBgswXLb8e/LxVWooTXXzDdOpDqKRlzDdqmHUYszKSd+U IDw01BOPZ9AOs8nq9tVWxZ5DDIeNZsAqV+EeJz5a1pC8YT24QajQsf1zsXY8NmCWn/ 62nHaHBaSjohmU43ja7y+b2d0hQwzQHSsH0j8ElI= 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 v7 23/39] port: use C11 alignas Date: Mon, 4 Mar 2024 09:52:28 -0800 Message-Id: <1709574764-9041-24-git-send-email-roretzla@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1709574764-9041-1-git-send-email-roretzla@linux.microsoft.com> References: <1707873986-29352-1-git-send-email-roretzla@linux.microsoft.com> <1709574764-9041-1-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/port/rte_port_frag.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/lib/port/rte_port_frag.c b/lib/port/rte_port_frag.c index 883601a..0940f94 100644 --- a/lib/port/rte_port_frag.c +++ b/lib/port/rte_port_frag.c @@ -34,7 +34,7 @@ struct rte_mempool *pool_direct, struct rte_mempool *pool_indirect); -struct rte_port_ring_reader_frag { +struct __rte_cache_aligned rte_port_ring_reader_frag { struct rte_port_in_stats stats; /* Input parameters */ @@ -53,7 +53,7 @@ struct rte_port_ring_reader_frag { uint32_t pos_frags; frag_op f_frag; -} __rte_cache_aligned; +}; static void * rte_port_ring_reader_frag_create(void *params, int socket_id, int is_ipv4)