check for kernel support before allowing robust mutex creation

[musl] / src / thread / sem_timedwait.c

diff --git a/src/thread/sem_timedwait.c b/src/thread/sem_timedwait.c
index a7488df..8132eb1 100644 (file)
--- a/src/thread/sem_timedwait.c
+++ b/src/thread/sem_timedwait.c
@@ -19,7 +19,7 @@ int sem_timedwait(sem_t *restrict sem, const struct timespec *restrict at)
                int r;
                a_inc(sem->__val+1);
                a_cas(sem->__val, 0, -1);
-               pthread_cleanup_push(cleanup, sem->__val+1);
+               pthread_cleanup_push(cleanup, (void *)(sem->__val+1));
                r = __timedwait_cp(sem->__val, -1, CLOCK_REALTIME, at, sem->__val[2]);
                pthread_cleanup_pop(1);
                if (r && r != EINTR) {