From e2a838697261bbf29d13ae085533517d7b889436 Mon Sep 17 00:00:00 2001
From: dchagin <dchagin@FreeBSD.org>
Date: Sun, 24 May 2015 14:54:12 +0000
Subject: 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.

Differential Revision:	https://reviews.freebsd.org/D1040
---
 sys/compat/linux/linux_emul.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'sys/compat/linux/linux_emul.c')

diff --git a/sys/compat/linux/linux_emul.c b/sys/compat/linux/linux_emul.c
index 6d88d7b..502e936 100644
--- a/sys/compat/linux/linux_emul.c
+++ b/sys/compat/linux/linux_emul.c
@@ -270,7 +270,7 @@ 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;
-- 
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