patch 7.4.1988
Problem: When updating viminfo with file marks there is no time order.
Solution: Remember the time when a buffer was last used, store marks for
the most recently used buffers.
diff --git a/src/structs.h b/src/structs.h
index 9d19c3c..05f4617 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -1771,6 +1771,10 @@
long b_mtime_read; /* last change time when reading */
off_T b_orig_size; /* size of original file in bytes */
int b_orig_mode; /* mode of original file */
+#ifdef FEAT_VIMINFO
+ time_T b_last_used; /* time when the buffer was last used; used
+ * for viminfo */
+#endif
pos_T b_namedm[NMARKS]; /* current named marks (mark.c) */