From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <dev-bounces@dpdk.org>
Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124])
	by inbox.dpdk.org (Postfix) with ESMTP id 7F6B643B1F;
	Wed, 14 Feb 2024 05:18:16 +0100 (CET)
Received: from mails.dpdk.org (localhost [127.0.0.1])
	by mails.dpdk.org (Postfix) with ESMTP id A5FDD42F3F;
	Wed, 14 Feb 2024 05:17:59 +0100 (CET)
Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182])
 by mails.dpdk.org (Postfix) with ESMTP id BA06242F0C
 for <dev@dpdk.org>; Wed, 14 Feb 2024 05:17:52 +0100 (CET)
Received: by linux.microsoft.com (Postfix, from userid 1086)
 id A6EA920B2001; Tue, 13 Feb 2024 20:17:51 -0800 (PST)
DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com A6EA920B2001
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com;
 s=default; t=1707884271;
 bh=DrECQuzcft6uwZnFXtkTeQJ7+0u0JZJ5ajf20rpqio0=;
 h=From:To:Cc:Subject:Date:In-Reply-To:References:From;
 b=RRy7TRlcvP6tZYmXCAbJHvGfrD5S1ASwnL3mMgyqA4z5Jj0v92z0wPyfh4dVRduSp
 5aPtvWlWkpIuH3/VfiuOivXZpBwsM2QIeb9yaAFFBwJI8Rg/elO4u3jVHdlU2Q0PJ2
 M8mZWHZ+SK4FDOcadT3TiuNLtpaos3cmtDRf9bzA=
From: Tyler Retzlaff <roretzla@linux.microsoft.com>
To: dev@dpdk.org
Cc: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>,
 Bruce Richardson <bruce.richardson@intel.com>,
 Chengwen Feng <fengchengwen@huawei.com>,
 Cristian Dumitrescu <cristian.dumitrescu@intel.com>,
 David Christensen <drc@linux.vnet.ibm.com>,
 David Hunt <david.hunt@intel.com>, Ferruh Yigit <ferruh.yigit@amd.com>,
 Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>,
 Jasvinder Singh <jasvinder.singh@intel.com>,
 Jerin Jacob <jerinj@marvell.com>, Kevin Laatz <kevin.laatz@intel.com>,
 Konstantin Ananyev <konstantin.v.ananyev@yandex.ru>,
 Min Zhou <zhoumin@loongson.cn>, Ruifeng Wang <ruifeng.wang@arm.com>,
 Sameh Gobriel <sameh.gobriel@intel.com>,
 Stanislaw Kardach <kda@semihalf.com>,
 Thomas Monjalon <thomas@monjalon.net>,
 Vladimir Medvedkin <vladimir.medvedkin@intel.com>,
 Yipeng Wang <yipeng1.wang@intel.com>,
 Tyler Retzlaff <roretzla@linux.microsoft.com>
Subject: [PATCH v2 02/14] stack: use C11 alignas
Date: Tue, 13 Feb 2024 20:17:38 -0800
Message-Id: <1707884270-27189-3-git-send-email-roretzla@linux.microsoft.com>
X-Mailer: git-send-email 1.8.3.1
In-Reply-To: <1707884270-27189-1-git-send-email-roretzla@linux.microsoft.com>
References: <1707873986-29352-1-git-send-email-roretzla@linux.microsoft.com>
 <1707884270-27189-1-git-send-email-roretzla@linux.microsoft.com>
X-BeenThere: dev@dpdk.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: DPDK patches and discussions <dev.dpdk.org>
List-Unsubscribe: <https://mails.dpdk.org/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://mails.dpdk.org/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <https://mails.dpdk.org/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
Errors-To: dev-bounces@dpdk.org

* 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 <roretzla@linux.microsoft.com>
---
 lib/stack/rte_stack.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/stack/rte_stack.h b/lib/stack/rte_stack.h
index a379300..573e15c 100644
--- a/lib/stack/rte_stack.h
+++ b/lib/stack/rte_stack.h
@@ -15,6 +15,8 @@
 #ifndef _RTE_STACK_H_
 #define _RTE_STACK_H_
 
+#include <stdalign.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -42,7 +44,7 @@ struct rte_stack_lf_head {
 
 struct rte_stack_lf_list {
 	/** List head */
-	struct rte_stack_lf_head head __rte_aligned(16);
+	alignas(16) struct rte_stack_lf_head head;
 	/** List len */
 	RTE_ATOMIC(uint64_t) len;
 };
-- 
1.8.3.1