Kernel panic on boot (VFS: unable to mount rootfs)

[commandcontrolQ]

When booting firm_linux_loader, Linux appears to load but then I get a rootfs kernel panic (for some reason it also displayed incorrectly):

[    6.596000] [<c05451c8>] (yncing: VFS: Unable to VFS: Unable to mount rootfs on un_

All of the files were not built by me but instead downloaded from their respective repositories.

File structure is as follows:

/linux
  | arm9linuxfw.bin
  | nintendo3ds_ktr.dtb
  | zImage
  | rootfs.cpio.gz
/luma/payloads/
  | firm_linux_loader.firm

Device is a New Nintendo 2DS XL.

[commandcontrolQ]

Update

I decided to compile everything (instead of downloading pre-compiled files from their repositories) and follow this repository's wiki as closely as possible.
The new file structure is as follows:

/linux
  | arm9linuxfw.bin
  | nintendo3ds_ktr.dtb
  | nintendo3ds_ctr.dtb
  | zImage
/luma/payloads/
  | firm_linux_loader.firm

Unfortunately, the kernel panic persists. If anyone knows how to fix this, please let me know.

[commandcontrolQ]

Issue fixed: All I needed to do was add an initramfs.cpio.gz into the linux folder. Renaming rootfs.cpio.gz does the trick.

[ParzivalWolfram]

This is a bug I intend to fix soon, but the current version of the arm toolchain needed to build the firmware is too new, and my attempts at adding it to buildroot haven't yet panned out. At some point soon, you'll only need to download the buildroot repo and that will build everything you need.

[webgtx]

@commandcontrolQ reopen the issue please.