svn commit: r283384 - head/sys/compat/linux
Dmitry Chagin
dchagin at FreeBSD.org
Sun May 24 14:54:13 UTC 2015
Author: dchagin
Date: Sun May 24 14:54:12 2015
New Revision: 283384
URL: https://svnweb.freebsd.org/changeset/base/283384
Log:
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
Modified:
head/sys/compat/linux/linux_emul.c
Modified: head/sys/compat/linux/linux_emul.c
==============================================================================
--- head/sys/compat/linux/linux_emul.c Sun May 24 14:53:16 2015 (r283383)
+++ head/sys/compat/linux/linux_emul.c Sun May 24 14:54:12 2015 (r283384)
@@ -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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