avoid setting errno when checking for tty

[musl] / src / stdio / __lockfile.c

diff --git a/src/stdio/__lockfile.c b/src/stdio/__lockfile.c
index 93c9486..c094825 100644 (file)
--- a/src/stdio/__lockfile.c
+++ b/src/stdio/__lockfile.c
@@ -13,7 +13,7 @@ void __lockfile(FILE *f)
                f->lockcount++;
                return;
        }
-       while (f->lock || a_cas(&f->lock, 0, tid))
+       while (a_cas(&f->lock, 0, tid))
                if (spins) spins--, a_spin();
                else syscall(SYS_sched_yield);
        f->lockcount = 1;