1 files changed, 4 insertions, 7 deletions
diff --git a/src/stdio/flockfile.c b/src/stdio/flockfile.c
index 6b574cf0..6806cf8b 100644
--- a/src/stdio/flockfile.c
+++ b/src/stdio/flockfile.c
@@ -1,14 +1,11 @@
 #include "stdio_impl.h"
 #include "pthread_impl.h"
 
-#define MAYBE_WAITERS 0x40000000
+void __register_locked_file(FILE *, pthread_t);
 
 void flockfile(FILE *f)
 {
-	while (ftrylockfile(f)) {
-		int owner = f->lock;
-		if (!owner) continue;
-		a_cas(&f->lock, owner, owner|MAYBE_WAITERS);
-		__futexwait(&f->lock, owner|MAYBE_WAITERS, 1);
-	}
+	if (!ftrylockfile(f)) return;
+	__lockfile(f);
+	__register_locked_file(f, __pthread_self());
 }