From owner-svn-src-stable@freebsd.org  Sat Jan  9 15:17:36 2016
Return-Path: <owner-svn-src-stable@freebsd.org>
Delivered-To: svn-src-stable@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 3ACB3A68512;
 Sat,  9 Jan 2016 15:17:36 +0000 (UTC)
 (envelope-from dchagin@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 mx1.freebsd.org (Postfix) with ESMTPS id 0CE5D1AF3;
 Sat,  9 Jan 2016 15:17:35 +0000 (UTC)
 (envelope-from dchagin@FreeBSD.org)
Received: from repo.freebsd.org ([127.0.1.37])
 by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id u09FHZ9F015120;
 Sat, 9 Jan 2016 15:17:35 GMT (envelope-from dchagin@FreeBSD.org)
Received: (from dchagin@localhost)
 by repo.freebsd.org (8.15.2/8.15.2/Submit) id u09FHZxk015119;
 Sat, 9 Jan 2016 15:17:35 GMT (envelope-from dchagin@FreeBSD.org)
Message-Id: <201601091517.u09FHZxk015119@repo.freebsd.org>
X-Authentication-Warning: repo.freebsd.org: dchagin set sender to
 dchagin@FreeBSD.org using -f
From: Dmitry Chagin <dchagin@FreeBSD.org>
Date: Sat, 9 Jan 2016 15:17:35 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org
Subject: svn commit: r293494 - stable/10/sys/compat/linux
X-SVN-Group: stable-10
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
X-BeenThere: svn-src-stable@freebsd.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: SVN commit messages for all the -stable branches of the src tree
 <svn-src-stable.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/svn-src-stable>, 
 <mailto:svn-src-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-stable/>
List-Post: <mailto:svn-src-stable@freebsd.org>
List-Help: <mailto:svn-src-stable-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/svn-src-stable>,
 <mailto:svn-src-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 09 Jan 2016 15:17:36 -0000

Author: dchagin
Date: Sat Jan  9 15:17:34 2016
New Revision: 293494
URL: https://svnweb.freebsd.org/changeset/base/293494

Log:
  MFC r283384:
  
  pthread_join() caller do futex_wait on child_clear_tid. As a results
  of multiple simultaneous calls to pthread_join() specifying the same
  target thread are undefined wake up the one thread.

Modified:
  stable/10/sys/compat/linux/linux_emul.c
Directory Properties:
  stable/10/   (props changed)

Modified: stable/10/sys/compat/linux/linux_emul.c
==============================================================================
--- stable/10/sys/compat/linux/linux_emul.c	Sat Jan  9 15:16:13 2016	(r293493)
+++ stable/10/sys/compat/linux/linux_emul.c	Sat Jan  9 15:17:34 2016	(r293494)
@@ -271,7 +271,7 @@ linux_thread_detach(struct thread *td)
 
 		cup.uaddr = child_clear_tid;
 		cup.op = LINUX_FUTEX_WAKE;
-		cup.val = 0x7fffffff;	/* Awake everyone */
+		cup.val = 1;		/* wake one */
 		cup.timeout = NULL;
 		cup.uaddr2 = NULL;
 		cup.val3 = 0;