hurd: Add __pthread_spin_wait and use it

900778283ac3 ("htl: make pthread_spin_lock really spin") made
pthread_spin_lock really spin and not block, but the current users of
__pthread_spin_lock were assuming that it blocks, i.e. they use it as a
lightweight mutex fitting in just one int.

__pthread_spin_wait provides that support back.

1 files changed, 1 insertions, 1 deletions

diff --git a/sysdeps/htl/pt-cond-signal.c b/sysdeps/htl/pt-cond-signal.c
index bbf2301..30f21cc 100644
--- a/sysdeps/htl/pt-cond-signal.c
+++ b/sysdeps/htl/pt-cond-signal.c
@@ -27,7 +27,7 @@ __pthread_cond_signal (pthread_cond_t *cond)
 {
   struct __pthread *wakeup;
 
-  __pthread_spin_lock (&cond->__lock);
+  __pthread_spin_wait (&cond->__lock);
   wakeup = cond->__queue;
   if (wakeup != NULL)
     __pthread_dequeue (wakeup);