tree f113b148714dc90bb4fde9d820c456c42e45d021
parent e442584ae86e6e9e1c488c191ebbb3e1bbca24dd
author Milton Miller <miltonm@us.ibm.com> 1456285728 -0600
committer Milton D. Miller II <miltonm@us.ibm.com> 1456336967 -0600

initfs: Add flash clear and update during init

Add code to clear the rwfs (preserving files from the whitelist)
during init, by a command line option.

Also allow it to be triggered by the file system not being a jffs2.

A console user can download images to /run/initramfs/ at the
debug-init-sh prompt for manual update.

Also add code but do not enable detecting images loaded into
initramfs / for future update options.  If enabled a custom initrd
with update images can be bulit (it would not fit in flash and
need to be netbooted).

Signed-off-by: Milton Miller <miltonm@us.ibm.com>