new file mode 100644
--- /dev/null
+++ b/packages/fs/jffs2/current/src/pushpull.h
@@ -0,0 +1,76 @@
+/*
+ * JFFS2 -- Journalling Flash File System, Version 2.
+ *
+ * Copyright (C) 2001 Red Hat, Inc.
+ *
+ * Created by David Woodhouse <dwmw2@cambridge.redhat.com>
+ *
+ * For licensing information, see the file 'LICENCE' in this directory.
+ *
+ * $Id: pushpull.h,v 1.6 2002/01/25 01:49:26 dwmw2 Exp $
+ *
+ */
+
+#ifndef __PUSHPULL_H__
+#define __PUSHPULL_H__
+
+#ifndef __ECOS
+#include <linux/errno.h>
+#else
+#include <errno.h>
+#endif
+
+struct pushpull {
+	unsigned char *buf;
+	unsigned int buflen;
+	unsigned int ofs;
+	unsigned int reserve;
+};
+
+
+static inline void init_pushpull(struct pushpull *pp, char *buf, unsigned buflen, unsigned ofs, unsigned reserve)
+{
+	pp->buf = buf;
+	pp->buflen = buflen;
+	pp->ofs = ofs;
+	pp->reserve = reserve;
+}
+
+static inline int pushbit(struct pushpull *pp, int bit, int use_reserved)
+{
+	if (pp->ofs >= pp->buflen - (use_reserved?0:pp->reserve)) {
+		return -ENOSPC;
+	}
+
+	if (bit) {
+		pp->buf[pp->ofs >> 3] |= (1<<(7-(pp->ofs &7)));
+	}
+	else {
+		pp->buf[pp->ofs >> 3] &= ~(1<<(7-(pp->ofs &7)));
+	}
+	pp->ofs++;
+
+	return 0;
+}
+
+static inline int pushedbits(struct pushpull *pp)
+{
+	return pp->ofs;
+}
+
+static inline int pullbit(struct pushpull *pp)
+{
+	int bit;
+
+	bit = (pp->buf[pp->ofs >> 3] >> (7-(pp->ofs & 7))) & 1;
+
+	pp->ofs++;
+	return bit;
+}
+
+static inline int pulledbits(struct pushpull *pp)
+{
+	return pp->ofs;
+}
+
+#endif /* __PUSHPULL_H__ */