fs/cramfs/Kconfig v3.0-rc7

CRAMFS

Compressed ROM file system support (cramfs)

Saying Y here includes support for CramFs (Compressed ROM File
System).  CramFs is designed to be a simple, small, and compressed
file system for ROM based embedded systems.  CramFs is read-only,
limited to 256MB file systems (with 16MB files), and doesn't support
16/32 bits uid/gid, hard links and timestamps.

See <file:Documentation/filesystems/cramfs.txt> and
<file:fs/cramfs/README> for further information.

To compile this as a module, choose M here: the module will be called
cramfs.  Note that the root file system (the one containing the
directory /) cannot be compiled as a module.

If unsure, say N.