musl - musl - an implementation of the standard library for Linux-based systems

diff --git a/src/thread/pthread_spin_trylock.c b/src/thread/pthread_spin_trylock.c
index c12696b3..1fc5f73c 100644
--- a/src/thread/pthread_spin_trylock.c
+++ b/src/thread/pthread_spin_trylock.c

@@ -2,5 +2,6 @@

int pthread_spin_trylock(pthread_spinlock_t *s)

{

- return -a_xchg(s, 1) & EBUSY;

+ if (*s || a_xchg(s, 1)) return EBUSY;

+ return 0;

}