[U-Boot-Users] CONFIG_ENV_OVERWRITE question

[sapirf fersht]

This parameter is rather confusing. In some places it is defined as 1
and it's mentioned it can be used to overwrite mac address (or env is
not writable now) in other places without 1 it says

include/configs/EP1C20.h:#define CONFIG_ENV_OVERWRITE
 /* Serial change Ok     */
include/configs/scb9328.h:#define   CONFIG_ENV_OVERWRITE  1      /*
env is not writable now   */

include/configs/QS823.h:#define CONFIG_ENV_OVERWRITE    1  /* allow
overwrite MAC address */

include/configs/PPChameleonEVB.h:#define CONFIG_ENV_OVERWRITE /* Let
the user to change the Ethernet MAC addresses */

So, what will be correct for ixdp425?
How this parameter can affect reading environment settings from flash?