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, 2 insertions, 2 deletions

diff --git a/sysdeps/htl/pt-cond-brdcast.c b/sysdeps/htl/pt-cond-brdcast.c
index 37dec0a31b..816d183ab4 100644
--- a/sysdeps/htl/pt-cond-brdcast.c
+++ b/sysdeps/htl/pt-cond-brdcast.c
@@ -26,7 +26,7 @@ __pthread_cond_broadcast (pthread_cond_t *cond)
 {
   struct __pthread *wakeup;
 
-  __pthread_spin_lock (&cond->__lock);
+  __pthread_spin_wait (&cond->__lock);
   while ((wakeup = cond->__queue))
     {
       __pthread_dequeue (wakeup);
@@ -34,7 +34,7 @@ __pthread_cond_broadcast (pthread_cond_t *cond)
       /* Wake it up without spin held, so it may have a chance to really
          preempt us */
       __pthread_wakeup (wakeup);
-      __pthread_spin_lock (&cond->__lock);
+      __pthread_spin_wait (&cond->__lock);
     }
   __pthread_spin_unlock (&cond->__lock);