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Previously, this function replaces the root password with '*' if 'debug-tweaks' is not in IMAGE_FEATURES. It not only zaps empty root password, but also zaps non-empty root password. That means, if the user uses a bbappend file for base-passwd to set the root password, he would not be able to login as root; if the user uses 'EXTRA_USERS_PARAMS' to set the root password, he would still not be able to login as root. What we really want from this function is to disallow empty root password if 'debug-tweaks' is not in IMAGE_FEATURES. This function should not remove non-empty root password because that password is usually deliberately set by the user. This patch renames zap_root_password to zap_empty_root_password to better reflect the intent of this function. It also modifies the code to make this function work correctly. (From OE-Core rev: c1037a74f934966a0df8c85138b09d672b9f8b36) Signed-off-by: Chen Qi <Qi.Chen@windriver.com> Signed-off-by: Saul Wold <sgw@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>