From owner-svn-src-all@freebsd.org  Tue Aug  7 18:56:02 2018
Return-Path: <owner-svn-src-all@freebsd.org>
Delivered-To: svn-src-all@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 612C51067C3B;
 Tue,  7 Aug 2018 18:56:02 +0000 (UTC)
 (envelope-from marius@FreeBSD.org)
Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org
 [IPv6:2610:1c1:1:606c::19:3])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client CN "mxrelay.nyi.freebsd.org",
 Issuer "Let's Encrypt Authority X3" (verified OK))
 by mx1.freebsd.org (Postfix) with ESMTPS id 17D687C398;
 Tue,  7 Aug 2018 18:56:02 +0000 (UTC)
 (envelope-from marius@FreeBSD.org)
Received: from repo.freebsd.org (repo.freebsd.org
 [IPv6:2610:1c1:1:6068::e6a:0])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id ED3501FBE2;
 Tue,  7 Aug 2018 18:56:01 +0000 (UTC)
 (envelope-from marius@FreeBSD.org)
Received: from repo.freebsd.org ([127.0.1.37])
 by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w77Iu1Ba097732;
 Tue, 7 Aug 2018 18:56:01 GMT (envelope-from marius@FreeBSD.org)
Received: (from marius@localhost)
 by repo.freebsd.org (8.15.2/8.15.2/Submit) id w77Iu1tv097731;
 Tue, 7 Aug 2018 18:56:01 GMT (envelope-from marius@FreeBSD.org)
Message-Id: <201808071856.w77Iu1tv097731@repo.freebsd.org>
X-Authentication-Warning: repo.freebsd.org: marius set sender to
 marius@FreeBSD.org using -f
From: Marius Strobl <marius@FreeBSD.org>
Date: Tue, 7 Aug 2018 18:56:01 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
Subject: svn commit: r337432 - head/sys/arm/include
X-SVN-Group: head
X-SVN-Commit-Author: marius
X-SVN-Commit-Paths: head/sys/arm/include
X-SVN-Commit-Revision: 337432
X-SVN-Commit-Repository: base
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.27
Precedence: list
List-Id: "SVN commit messages for the entire src tree \(except for &quot;
 user&quot; and &quot; projects&quot; \)" <svn-src-all.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/svn-src-all>,
 <mailto:svn-src-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all/>
List-Post: <mailto:svn-src-all@freebsd.org>
List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/svn-src-all>,
 <mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 07 Aug 2018 18:56:02 -0000

Author: marius
Date: Tue Aug  7 18:56:01 2018
New Revision: 337432
URL: https://svnweb.freebsd.org/changeset/base/337432

Log:
  Implement atomic_swap_64(9).

Modified:
  head/sys/arm/include/atomic-v4.h

Modified: head/sys/arm/include/atomic-v4.h
==============================================================================
--- head/sys/arm/include/atomic-v4.h	Tue Aug  7 18:29:10 2018	(r337431)
+++ head/sys/arm/include/atomic-v4.h	Tue Aug  7 18:56:01 2018	(r337432)
@@ -249,6 +249,19 @@ atomic_subtract_64(volatile u_int64_t *p, u_int64_t va
 	__with_interrupts_disabled(*p -= val);
 }
 
+static __inline uint64_t
+atomic_swap_64(volatile uint64_t *p, uint64_t v)
+{
+	uint64_t value;
+
+	__with_interrupts_disabled(
+	{
+		value = *p;
+		*p = v;
+	});
+	return (value);
+}
+
 #else /* !_KERNEL */
 
 static __inline void