fix robust mutex unrecoverable status, and related clean-up

[musl] / src / thread / pthread_mutex_consistent.c

diff --git a/src/thread/pthread_mutex_consistent.c b/src/thread/pthread_mutex_consistent.c
index 0db976a..96b83b5 100644 (file)
--- a/src/thread/pthread_mutex_consistent.c
+++ b/src/thread/pthread_mutex_consistent.c
@@ -5,6 +5,6 @@ int pthread_mutex_consistent(pthread_mutex_t *m)
        if (!(m->_m_type & 8)) return EINVAL;
        if ((m->_m_lock & 0x7fffffff) != __pthread_self()->tid)
                return EPERM;
-       m->_m_type -= 8;
+       m->_m_type &= ~8U;
        return 0;
 }