add missing memory barrier to pthread_join

[musl] / src / thread / sem_open.c

diff --git a/src/thread/sem_open.c b/src/thread/sem_open.c
index 9a95d25..fda0acd 100644 (file)
--- a/src/thread/sem_open.c
+++ b/src/thread/sem_open.c
@@ -20,7 +20,7 @@ static struct {
        sem_t *sem;
        int refcnt;
 } *semtab;
-static int lock[2];
+static volatile int lock[2];
 
 #define FLAGS (O_RDWR|O_NOFOLLOW|O_CLOEXEC|O_NONBLOCK)
 
@@ -126,6 +126,7 @@ sem_t *sem_open(const char *name, int flags, ...)
                e = link(tmp, name) ? errno : 0;
                unlink(tmp);
                if (!e) break;
+               munmap(map, sizeof(sem_t));
                /* Failure is only fatal when doing an exclusive open;
                 * otherwise, next iteration will try to open the
                 * existing file. */