[U-Boot-Users] bootargs env variable and CONFIG_CMDLINE in .config

Can someone please enlighten me on the relationship between u-boot's env variable "bootargs" which gets passed to the linux kernel, and the CONFIG_CMDLINE kernel configuration setting in .config? Which one takes precedence if CONFIG_CMDLINE_BOOL is set and CONFIG_CMDLINE has a string in it?

I'm running an ebony system with u-boot, booting a MontaVista 3.0 kernel. I have modified MV's version of ebony.c to copy the bootargs env info to "cmd_line", and this info is displayed when the kernel boots up, but I don't think the kernel is really using this.

If I'm using bootargs from u-boot, do I have to disable CONFIG_CMDLINE_BOOL in the kernel .config?

Thanks.

Erik