Name:          devfs
Version:       218
Kernelver:     2.5.43
Status:        8
Author:        Richard Gooch <rgooch@atnf.csiro.au>
Description:   Device File System
Date:          15-OCT-2002
Descfile-URL:  ftp://ftp.atnf.csiro.au/pub/people/rgooch/linux/kernel-patches/v2.4/devfs.desc
Download-URL:  ftp://ftp.atnf.csiro.au/pub/people/rgooch/linux/kernel-patches/v2.4/devfs-patch-current.gz
Homepage-URL:  http://www.atnf.csiro.au/~rgooch/linux/kernel-patches.html
Manual-URL:    http://www.atnf.csiro.au/~rgooch/linux/docs/devfs.html

Note that devfs has appeared in the official 2.3.46 kernel. The devfs
patches now contain improvements and fixes to what is in the kernel.

Devfs is an alternative to "real" character and block special devices
on your root filesystem. Kernel device drivers can register devices by
name rather than major and minor numbers. These devices will appear in
the devfs automatically, with whatever default ownership and
protection the driver specified.

NOTE that devfs is entirely optional. If you prefer the old disc-based
device nodes, then simply leave CONFIG_DEVFS_FS=n (the default). In
this case, nothing will change.

There are two aspects to devfs: one is the underlying device
namespace, which is a namespace just like any mounted filesystem. The
other aspect is the filesystem code which provides a view of the
device namespace.
Because the devfs namespace exists without mounting devfs, you
can easily mount the root filesystem by referring to an entry in the
devfs namespace.