D61381.1794458944.diff
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	diff --git a/lib/libthr/thread/thr_mutex.c b/lib/libthr/thread/thr_mutex.c
	--- a/lib/libthr/thread/thr_mutex.c
	+++ b/lib/libthr/thread/thr_mutex.c
	@@ -905,8 +905,9 @@
	mutex_self_lock(struct pthread_mutex m, const struct timespec abstime,
	clockid_t clockid)
	{
	- struct timespec ts1, ts2;
	+ struct timespec ts1;
	int ret;
	+ u_int dummy;

	switch (PMUTEX_TYPE(m->m_flags)) {
	case PTHREAD_MUTEX_ERRORCHECK:
	@@ -932,8 +933,11 @@
	clock_gettime(clockid, &ts1) == -1) {
	ret = EINVAL;
	} else {
	- TIMESPEC_SUB(&ts2, abstime, &ts1);
	- __sys_nanosleep(&ts2, NULL);
	+ dummy = 0;
	+ do {
	+ ret = _thr_umtx_timedwait_uint(&dummy,
	+ 0, clockid, abstime, 0);
	+ } while (ret == 0 \|\| ret == EINTR);
	ret = ETIMEDOUT;
	}
	} else {