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/sem-getvalue.c b/sysdeps/htl/sem-getvalue.c
index 9c8188e866..2d72a63824 100644
--- a/sysdeps/htl/sem-getvalue.c
+++ b/sysdeps/htl/sem-getvalue.c
@@ -22,7 +22,7 @@
 int
 __sem_getvalue (sem_t *restrict sem, int *restrict value)
 {
-  __pthread_spin_lock (&sem->__lock);
+  __pthread_spin_wait (&sem->__lock);
   *value = sem->__value;
   __pthread_spin_unlock (&sem->__lock);