-#define FL_INIT(l, f) (l) = (f) /* Specific flags location. */
-#define FL_SET(l, f) ((l) |= (f))
-#define FL_CLR(l, f) ((l) &= ~(f))
-#define FL_ISSET(l, f) ((l) & (f))
-
-#define F_INIT(p, f) FL_INIT((p)->flags, f) /* Structure element flags. */
-#define F_SET(p, f) FL_SET((p)->flags, f)
-#define F_CLR(p, f) FL_CLR((p)->flags, f)
-#define F_ISSET(p, f) FL_ISSET((p)->flags, f)
+#define ISL_FL_INIT(l, f) (l) = (f) /* Specific flags location. */
+#define ISL_FL_SET(l, f) ((l) |= (f))
+#define ISL_FL_CLR(l, f) ((l) &= ~(f))
+#define ISL_FL_ISSET(l, f) ((l) & (f))
+
+#define ISL_F_INIT(p, f) ISL_FL_INIT((p)->flags, f) /* Structure element flags. */
+#define ISL_F_SET(p, f) ISL_FL_SET((p)->flags, f)
+#define ISL_F_CLR(p, f) ISL_FL_CLR((p)->flags, f)
+#define ISL_F_ISSET(p, f) ISL_FL_ISSET((p)->flags, f)