As the kbuild bot has already reported, you've added an unconditional dependency on the NLS subsystem, which is not always compiled in. What we need to do is to add #ifdef's on CONFIG_NLS, and only support file systems with encoding if the kernel is compiled with CONFIG_NLS. One thought --- do we really need to use CONFIG_NLS if the encoding is ASCII? If some use case (and Android may be one) only is interested in supporting case-folding for ASCII, and they don't want to have the overhead of compiling in the NLS subsystem, for ASCII couldn't use just use strcasecmp() for its comparison function? The normalization for ASCII is the identify function, so it's kind of pointless to support ASCII if we ony have case-folding support and not normalization for now, right? - Ted
