I don't know what you are talking about, I do not have 5.0.1 and as far as I know that only works for 5.X.X.
So yea, for me LayeredFS doesn't even exists xD
5.1.0 and 4.1.0. Probably, depends what you want to do with it. Search this site for it through Google with your firmware and see what you can find.
https://gbatemp.net/threads/how-to-...t-games-work-dont.507510/page-33#post-8059873
OK kernel-patched.bin 4.1.0 works now, perfect! (more work porting it to lower fw... ^^)
https://gbatemp.net/threads/atmosphere-layeredfs.507653/page-3