- * Check accessed and update flags on an inode structure.
- * If any is on, update the inode with the current time.
- * If waitfor is given, then must ensure I/O order,
- * so wait for write to complete.
+ * Update the access, modified, and inode change times as specified
+ * by the IACC, IMOD, and ICHG flags respectively. The IUPD flag
+ * is used to specify that the inode needs to be updated but that
+ * the times have already been set. The access and modified times
+ * are taken from the second and third parameters; the inode change
+ * time is always taken from the current time. If waitfor is set,
+ * then wait for the disk write of the inode to complete.