Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/devfs-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/devfs-2.6: (22 commits) [PATCH] devfs: Remove it from the feature_removal.txt file [PATCH] devfs: Last little devfs cleanups throughout the kernel tree. [PATCH] devfs: Rename TTY_DRIVER_NO_DEVFS to TTY_DRIVER_DYNAMIC_DEV [PATCH] devfs: Remove the tty_driver devfs_name field as it's no longer needed [PATCH] devfs: Remove the line_driver devfs_name field as it's no longer needed [PATCH] devfs: Remove the videodevice devfs_name field as it's no longer needed [PATCH] devfs: Remove the gendisk devfs_name field as it's no longer needed [PATCH] devfs: Remove the miscdevice devfs_name field as it's no longer needed [PATCH] devfs: Remove the devfs_fs_kernel.h file from the tree [PATCH] devfs: Remove devfs_remove() function from the kernel tree [PATCH] devfs: Remove devfs_mk_cdev() function from the kernel tree [PATCH] devfs: Remove devfs_mk_bdev() function from the kernel tree [PATCH] devfs: Remove devfs_mk_symlink() function from the kernel tree [PATCH] devfs: Remove devfs_mk_dir() function from the kernel tree [PATCH] devfs: Remove devfs_*_tape() functions from the kernel tree [PATCH] devfs: Remove devfs support from the sound subsystem [PATCH] devfs: Remove devfs support from the ide subsystem. [PATCH] devfs: Remove devfs support from the serial subsystem [PATCH] devfs: Remove devfs from the init code [PATCH] devfs: Remove devfs from the partition code ...
author: Linus Torvalds <torvalds@g5.osdl.org> 2006-06-29 17:19:21 -0400
committer: Linus Torvalds <torvalds@g5.osdl.org> 2006-06-29 17:19:21 -0400
commit: 602cada851b28c5792339786efe872fbdc1f5d41 (patch)
tree: 233d474b74d6038b5bb54a07ad91dd1bb10b0218
parent: 82991c6f2c361acc17279b8124d9bf1878973435 (diff)
parent: fee68d1cc0d9bd863e51c16cdcd707737b16bb38 (diff)
197 files changed, 96 insertions, 8271 deletions
diff --git a/Documentation/Changes b/Documentation/Changes
index b02f476c2973..488272074c36 100644
--- a/Documentation/Changes
+++ b/Documentation/Changes
@@ -181,8 +181,8 @@ Intel IA32 microcode
 --------------------
 A driver has been added to allow updating of Intel IA32 microcode,
-accessible as both a devfs regular file and as a normal (misc)
+accessible as a normal (misc) character device.  If you are not using
-character device.  If you are not using devfs you may need to:
+udev you may need to:
 mkdir /dev/cpu
 mknod /dev/cpu/microcode c 10 184
@@ -201,7 +201,9 @@ with programs using shared memory.
 udev
 ----
 udev is a userspace application for populating /dev dynamically with
-only entries for devices actually present. udev replaces devfs.
+only entries for devices actually present.  udev replaces the basic
+functionality of devfs, while allowing persistant device naming for
+devices.
 FUSE
 ----
@@ -231,18 +233,13 @@ The PPP driver has been restructured to support multilink and to
 enable it to operate over diverse media layers.  If you use PPP,
 upgrade pppd to at least 2.4.0.
-If you are not using devfs, you must have the device file /dev/ppp
+If you are not using udev, you must have the device file /dev/ppp
 which can be made by:
 mknod /dev/ppp c 108 0
 as root.
-If you use devfsd and build ppp support as modules, you will need
-the following in your /etc/devfsd.conf file:
-LOOKUP  PPP     MODLOAD
 Isdn4k-utils
 ------------
diff --git a/Documentation/DocBook/kernel-api.tmpl b/Documentation/DocBook/kernel-api.tmpl
index 3630a0d7695f..1ae4dc0fd856 100644
--- a/Documentation/DocBook/kernel-api.tmpl
+++ b/Documentation/DocBook/kernel-api.tmpl
@@ -348,11 +348,6 @@ X!Earch/i386/kernel/mca.c
     </sect1>
  </chapter>
-  <chapter id="devfs">
-     <title>The Device File System</title>
-!Efs/devfs/base.c
-  </chapter>
  <chapter id="sysfs">
     <title>The Filesystem for Exporting Kernel Objects</title>
 !Efs/sysfs/file.c
diff --git a/Documentation/README.DAC960 b/Documentation/README.DAC960
index 98ea617a0dd6..0e8f618ab534 100644
--- a/Documentation/README.DAC960
+++ b/Documentation/README.DAC960
@@ -78,9 +78,9 @@ also known as "System Drives", and Drive Groups are also called "Packs".  Both
 terms are in use in the Mylex documentation; I have chosen to standardize on
 the more generic "Logical Drive" and "Drive Group".
-DAC960 RAID disk devices are named in the style of the Device File System
+DAC960 RAID disk devices are named in the style of the obsolete Device File
-(DEVFS).  The device corresponding to Logical Drive D on Controller C is
+System (DEVFS).  The device corresponding to Logical Drive D on Controller C
-referred to as /dev/rd/cCdD, and the partitions are called /dev/rd/cCdDp1
+is referred to as /dev/rd/cCdD, and the partitions are called /dev/rd/cCdDp1
 through /dev/rd/cCdDp7.  For example, partition 3 of Logical Drive 5 on
 Controller 2 is referred to as /dev/rd/c2d5p3.  Note that unlike with SCSI
 disks the device names will not change in the event of a disk drive failure.
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index b1c6c7036c1c..1cbbb8e28999 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -6,17 +6,6 @@ be removed from this file.
 ---------------------------
-What:   devfs
-When:   July 2005
-Files:  fs/devfs/*, include/linux/devfs_fs*.h and assorted devfs
-        function calls throughout the kernel tree
-Why:    It has been unmaintained for a number of years, has unfixable
-        races, contains a naming policy within the kernel that is
-        against the LSB, and can be replaced by using udev.
-Who:    Greg Kroah-Hartman <greg@kroah.com>
---------------------------
 What:   RAW driver (CONFIG_RAW_DRIVER)
 When:   December 2005
 Why:    declared obsolete since kernel 2.6.3
diff --git a/Documentation/filesystems/devfs/ChangeLog b/Documentation/filesystems/devfs/ChangeLog
deleted file mode 100644
index e5aba5246d7c..000000000000
--- a/Documentation/filesystems/devfs/ChangeLog
+++ /dev/null
@@ -1,1977 +0,0 @@
-/* -*- auto-fill -*-                                                         */
-===============================================================================
-Changes for patch v1
- creation of devfs
- modified miscellaneous character devices to support devfs
-===============================================================================
-Changes for patch v2
- bug fix with manual inode creation
-===============================================================================
-Changes for patch v3
- bugfixes
- documentation improvements
- created a couple of scripts (one to save&restore a devfs and the
-  other to set up compatibility symlinks)
- devfs support for SCSI discs. New name format is: sd_hHcCiIlL
-===============================================================================
-Changes for patch v4
- bugfix for the directory reading code
- bugfix for compilation with kerneld
- devfs support for generic hard discs
- rationalisation of the various watchdog drivers
-===============================================================================
-Changes for patch v5
- support for mounting directly from entries in the devfs (it doesn't
-  need to be mounted to do this), including the root filesystem.
-  Mounting of swap partitions also works. Hence, now if you set
-  CONFIG_DEVFS_ONLY to 'Y' then you won't be able to access your discs
-  via ordinary device nodes. Naturally, the default is 'N' so that you
-  can still use your old device nodes.  If you want to mount from devfs
-  entries, make sure you use: append = "root=/dev/sd_..." in your
-  lilo.conf. It seems LILO looks for the device number (major&minor)
-  and writes that into the kernel image :-( 
- support for character memory devices (/dev/null, /dev/zero, /dev/full
-  and so on). Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
-===============================================================================
-Changes for patch v6
- support for subdirectories
- support for symbolic links (created by devfs_mk_symlink(), no
-  support yet for creation via symlink(2))
- SCSI disc naming now cast in stone, with the format:
-  /dev/sd/c0b1t2u3      controller=0, bus=1, ID=2, LUN=3, whole disc
-  /dev/sd/c0b1t2u3p4    controller=0, bus=1, ID=2, LUN=3, 4th partition
- loop devices now appear in devfs
- tty devices, console, serial ports, etc. now appear in devfs
-  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
- bugs with mounting devfs-only devices now fixed
-===============================================================================
-Changes for patch v7
- SCSI CD-ROMS, tapes and generic devices now appear in devfs
-===============================================================================
-Changes for patch v8
- bugfix with no-rewind SCSI tapes
- RAMDISCs now appear in devfs
- better cleaning up of devfs entries created by various modules
- interface change to <devfs_register>
-===============================================================================
-Changes for patch v9
- the v8 patch was corrupted somehow, which would affect the patch for
-  linux/fs/filesystems.c
-  I've also fixed the v8 patch file on the WWW
- MetaDevices (/dev/md*) should now appear in devfs
-===============================================================================
-Changes for patch v10
- bugfix in meta device support for devfs
- created this ChangeLog file
- added devfs support to the floppy driver
- added support for creating sockets in a devfs
-===============================================================================
-Changes for patch v11
- added DEVFS_FL_HIDE_UNREG flag
- incorporated better patch for ttyname() in libc 5.4.43 from H.J. Lu.
- interface change to <devfs_mk_symlink>
- support for creating symlinks with symlink(2)
- parallel port printer (/dev/lp*) now appears in devfs
-===============================================================================
-Changes for patch v12
- added inode check to <devfs_fill_file> function
- improved devfs support when mounting from devfs
- added call to <<release>> operation when removing swap areas on
-  devfs devices
- increased NR_SUPER to 128 to support large numbers of devfs mounts
-  (for chroot(2) gaols)
- fixed bug in SCSI disc support: was generating incorrect minors if
-  SCSI ID's did not start at 0 and increase by 1
- support symlink traversal when mounting root
-===============================================================================
-Changes for patch v13
- added devfs support to soundcard driver
-  Thanks to Eric Dumas <dumas@linux.eu.org> and
-  C. Scott Ananian <cananian@alumni.princeton.edu>
- added devfs support to the joystick driver
- loop driver now has it's own subdirectory "/dev/loop/"
- created <devfs_get_flags> and <devfs_set_flags> functions
- fix problem with SCSI disc compatibility names (sd{a,b,c,d,e,f})
-  which assumes ID's start at 0 and increase by 1. Also only create
-  devfs entries for SCSI disc partitions which actually exist
-  Show new names in partition check
-  Thanks to Jakub Jelinek <jj@sunsite.ms.mff.cuni.cz>
-===============================================================================
-Changes for patch v14
- bug fix in floppy driver: would not compile without
-  CONFIG_DEVFS_FS='Y'
-  Thanks to Jurgen Botz <jbotz@nova.botz.org>
- bug fix in loop driver
-  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
- do not create devfs entries for printers not configured
-  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
- do not create devfs entries for serial ports not present
-  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
- ensure <tty_register_devfs> is exported from tty_io.c
-  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
- allow unregistering of devfs symlink entries
- fixed bug in SCSI disc naming introduced in last patch version
-===============================================================================
-Changes for patch v15
- ported to kernel 2.1.81
-===============================================================================
-Changes for patch v16
- created <devfs_set_symlink_destination> function
- moved DEVFS_SUPER_MAGIC into header file
- added DEVFS_FL_HIDE flag
- created <devfs_get_maj_min>
- created <devfs_get_handle_from_inode>
- fixed bugs in searching by major&minor
- changed interface to <devfs_unregister>, <devfs_fill_file> and
-  <devfs_find_handle>
- fixed inode times when symlink created with symlink(2)
- change tty driver to do auto-creation of devfs entries
-  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
- fixed bug in genhd.c: whole disc (non-SCSI) was not registered to
-  devfs
- updated libc 5.4.43 patch for ttyname()
-===============================================================================
-Changes for patch v17
- added CONFIG_DEVFS_TTY_COMPAT
-  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
- bugfix in devfs support for drivers/char/lp.c
-  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
- clean up serial driver so that PCMCIA devices unregister correctly
-  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
- fixed bug in genhd.c: whole disc (non-SCSI) was not registered to
-  devfs [was missing in patch v16]
- updated libc 5.4.43 patch for ttyname() [was missing in patch v16]
- all SCSI devices now registered in /dev/sg
- support removal of devfs entries via unlink(2)
-===============================================================================
-Changes for patch v18
- added floppy/?u720 floppy entry
- fixed kerneld support for entries in devfs subdirectories
- incorporated latest patch for ttyname() in libc 5.4.43 from H.J. Lu.
-===============================================================================
-Changes for patch v19
- bug fix when looking up unregistered entries: kerneld was not called
- fixes for kernel 2.1.86 (now requires 2.1.86)
-===============================================================================
-Changes for patch v20
- only create available floppy entries
-  Thanks to Andrzej Krzysztofowicz <ankry@green.mif.pg.gda.pl>
- new IDE naming scheme following SCSI format (i.e. /dev/id/c0b0t0u0p1
-  instead of /dev/hda1)
-  Thanks to Andrzej Krzysztofowicz <ankry@green.mif.pg.gda.pl>
- new XT disc naming scheme following SCSI format (i.e. /dev/xd/c0t0p1
-  instead of /dev/xda1)
-  Thanks to Andrzej Krzysztofowicz <ankry@green.mif.pg.gda.pl>
- new non-standard CD-ROM names (i.e. /dev/sbp/c#t#)
-  Thanks to Andrzej Krzysztofowicz <ankry@green.mif.pg.gda.pl>
- allow symlink traversal when mounting the root filesystem
- Create entries for MD devices at MD init
-  Thanks to Christophe Leroy <christophe.leroy5@capway.com>
-===============================================================================
-Changes for patch v21
- ported to kernel 2.1.91
-===============================================================================
-Changes for patch v22
- SCSI host number patch ("scsihosts=" kernel option)
-  Thanks to Andrzej Krzysztofowicz <ankry@green.mif.pg.gda.pl>
-===============================================================================
-Changes for patch v23
- Fixed persistence bug with device numbers for manually created
-  device files
- Fixed problem with recreating symlinks with different content
- Added CONFIG_DEVFS_MOUNT (mount devfs on /dev at boot time)
-===============================================================================
-Changes for patch v24
- Switched from CONFIG_KERNELD to CONFIG_KMOD: module autoloading
-  should now work again
- Hide entries which are manually unlinked
- Always invalidate devfs dentry cache when registering entries
- Support removal of devfs directories via rmdir(2)
- Ensure directories created by <devfs_mk_dir> are visible
- Default no access for "other" for floppy device
-===============================================================================
-Changes for patch v25
- Updates to CREDITS file and minor IDE numbering change
-  Thanks to Andrzej Krzysztofowicz <ankry@green.mif.pg.gda.pl>
- Invalidate devfs dentry cache when making directories
- Invalidate devfs dentry cache when removing entries
- More informative message if root FS mount fails when devfs
-  configured
- Fixed persistence bug with fifos
-===============================================================================
-Changes for patch v26
- ported to kernel 2.1.97
- Changed serial directory from "/dev/serial" to "/dev/tts" and
-  "/dev/consoles" to "/dev/vc" to be more friendly to new procps
-===============================================================================
-Changes for patch v27
- Added support for IDE4 and IDE5
-  Thanks to Andrzej Krzysztofowicz <ankry@green.mif.pg.gda.pl>
- Documented "scsihosts=" boot parameter
- Print process command when debugging kerneld/kmod
- Added debugging for register/unregister/change operations
- Added "devfs=" boot options
- Hide unregistered entries by default
-===============================================================================
-Changes for patch v28
- No longer lock/unlock superblock in <devfs_put_super> (cope with
-  recent VFS interface change)
- Do not automatically change ownership/protection of /dev/tty
- Drop negative dentries when they are released
- Manage dcache more efficiently
-===============================================================================
-Changes for patch v29
- Added DEVFS_FL_AUTO_DEVNUM flag
-===============================================================================
-Changes for patch v30
- No longer set unnecessary methods
- Ported to kernel 2.1.99-pre3
-===============================================================================
-Changes for patch v31
- Added PID display to <call_kerneld> debugging message
- Added "diread" and "diwrite" options
- Ported to kernel 2.1.102
- Fixed persistence problem with permissions
-===============================================================================
-Changes for patch v32
- Fixed devfs support in drivers/block/md.c
-===============================================================================
-Changes for patch v33
- Support legacy device nodes
- Fixed bug where recreated inodes were hidden
- New IDE naming scheme: everything is under /dev/ide
-===============================================================================
-Changes for patch v34
- Improved debugging in <get_vfs_inode>
- Prevent duplicate calls to <devfs_mk_dir> in SCSI layer
- No longer free old dentries in <devfs_mk_dir>
- Free all dentries for a given entry when deleting inodes
-===============================================================================
-Changes for patch v35
- Ported to kernel 2.1.105 (sound driver changes)
-===============================================================================
-Changes for patch v36
- Fixed sound driver port
-===============================================================================
-Changes for patch v37
- Minor documentation tweaks
-===============================================================================
-Changes for patch v38
- More documentation tweaks
- Fix for sound driver port
- Removed ttyname-patch (grab libc 5.4.44 instead)
- Ported to kernel 2.1.107-pre2 (loop driver fix)
-===============================================================================
-Changes for patch v39
- Ported to kernel 2.1.107 (hd.c hunk broke due to spelling "fixes"). Sigh
- Removed many #ifdef's, replaced with trickery in include/devfs_fs.h
-===============================================================================
-Changes for patch v40
- Fix for sound driver port
- Limit auto-device numbering to majors 128 to 239
-===============================================================================
-Changes for patch v41
- Fixed inode times persistence problem
-===============================================================================
-Changes for patch v42
- Ported to kernel 2.1.108 (drivers/scsi/hosts.c hunk broke)
-===============================================================================
-Changes for patch v43
- Fixed spelling in <devfs_readlink> debug
- Fixed bug in <devfs_setup> parsing "dilookup"
- More #ifdef's removed
- Supported Sparc keyboard (/dev/kbd)
- Supported DSP56001 digital signal processor (/dev/dsp56k)
- Supported Apple Desktop Bus (/dev/adb)
- Supported Coda network file system (/dev/cfs*)
-===============================================================================
-Changes for patch v44
- Fixed devfs inode leak when manually recreating inodes
- Fixed permission persistence problem when recreating inodes
-===============================================================================
-Changes for patch v45
- Ported to kernel 2.1.110
-===============================================================================
-Changes for patch v46
- Ported to kernel 2.1.112-pre1
- Removed harmless "unused variable" compiler warning
- Fixed modes for manually recreated device nodes
-===============================================================================
-Changes for patch v47
- Added NULL devfs inode warning in <devfs_read_inode>
- Force all inode nlink values to 1
-===============================================================================
-Changes for patch v48
- Added "dimknod" option
- Set inode nlink to 0 when freeing dentries
- Added support for virtual console capture devices (/dev/vcs*)
-  Thanks to Dennis Hou <smilax@mindmeld.yi.org>
- Fixed modes for manually recreated symlinks
-===============================================================================
-Changes for patch v49
- Ported to kernel 2.1.113
-===============================================================================
-Changes for patch v50
- Fixed bugs in recreated directories and symlinks
-===============================================================================
-Changes for patch v51
- Improved robustness of rc.devfs script
-  Thanks to Roderich Schupp <rsch@experteam.de>
- Fixed bugs in recreated device nodes
- Fixed bug in currently unused <devfs_get_handle_from_inode>
- Defined new <devfs_handle_t> type
- Improved debugging when getting entries
- Fixed bug where directories could be emptied
- Ported to kernel 2.1.115
-===============================================================================
-Changes for patch v52
- Replaced dummy .epoch inode with .devfsd character device
- Modified rc.devfs to take account of above change
- Removed spurious driver warning messages when CONFIG_DEVFS_FS=n
- Implemented devfsd protocol revision 0
-===============================================================================
-Changes for patch v53
- Ported to kernel 2.1.116 (kmod change broke hunk)
- Updated Documentation/Configure.help
- Test and tty pattern patch for rc.devfs script
-  Thanks to Roderich Schupp <rsch@experteam.de>
- Added soothing message to warning in <devfs_d_iput>
-===============================================================================
-Changes for patch v54
- Ported to kernel 2.1.117
- Fixed default permissions in sound driver
- Added support for frame buffer devices (/dev/fb*)
-===============================================================================
-Changes for patch v55
- Ported to kernel 2.1.119
- Use GCC extensions for structure initialisations
- Implemented async open notification
- Incremented devfsd protocol revision to 1
-===============================================================================
-Changes for patch v56
- Ported to kernel 2.1.120-pre3
- Moved async open notification to end of <devfs_open>
-===============================================================================
-Changes for patch v57
- Ported to kernel 2.1.121
- Prepended "/dev/" to module load request
- Renamed <call_kerneld> to <call_kmod>
- Created sample modules.conf file
-===============================================================================
-Changes for patch v58
- Fixed typo "AYSNC" -> "ASYNC"
-===============================================================================
-Changes for patch v59
- Added open flag for files
-===============================================================================
-Changes for patch v60
- Ported to kernel 2.1.123-pre2
-===============================================================================
-Changes for patch v61
- Set i_blocks=0 and i_blksize=1024 in <devfs_read_inode>
-===============================================================================
-Changes for patch v62
- Ported to kernel 2.1.123
-===============================================================================
-Changes for patch v63
- Ported to kernel 2.1.124-pre2
-===============================================================================
-Changes for patch v64
- Fixed Unix98 pty support
- Increased buffer size in <get_partition_list> to avoid crash and
-  burn
-===============================================================================
-Changes for patch v65
- More Unix98 pty support fixes
- Added test for empty <<name>> in <devfs_find_handle>
- Renamed <generate_path> to <devfs_generate_path> and published
- Created /dev/root symlink
-  Thanks to Roderich Schupp <rsch@ExperTeam.de>
-  with further modifications by me
-===============================================================================
-Changes for patch v66
- Yet more Unix98 pty support fixes (now tested)
- Created <devfs_get_fops>
- Support media change checks when CONFIG_DEVFS_ONLY=y
- Abolished Unix98-style PTY names for old PTY devices
-===============================================================================
-Changes for patch v67
- Added inline declaration for dummy <devfs_generate_path>
- Removed spurious "unable to register... in devfs" messages when
-  CONFIG_DEVFS_FS=n
- Fixed misc. devices when CONFIG_DEVFS_FS=n
- Limit auto-device numbering to majors 144 to 239
-===============================================================================
-Changes for patch v68
- Hide unopened virtual consoles from directory listings
- Added support for video capture devices
- Ported to kernel 2.1.125
-===============================================================================
-Changes for patch v69
- Fix for CONFIG_VT=n
-===============================================================================
-Changes for patch v70
- Added support for non-OSS/Free sound cards
-===============================================================================
-Changes for patch v71
- Ported to kernel 2.1.126-pre2
-===============================================================================
-Changes for patch v72
- #ifdef's for CONFIG_DEVFS_DISABLE_OLD_NAMES removed
-===============================================================================
-Changes for patch v73
- CONFIG_DEVFS_DISABLE_OLD_NAMES replaced with "nocompat" boot option
- CONFIG_DEVFS_BOOT_OPTIONS removed: boot options always available
-===============================================================================
-Changes for patch v74
- Removed CONFIG_DEVFS_MOUNT and "mount" boot option and replaced with
-  "nomount" boot option
- Documentation updates
- Updated sample modules.conf
-===============================================================================
-Changes for patch v75
- Updated sample modules.conf
- Remount devfs after initrd finishes
- Ported to kernel 2.1.127
- Added support for ISDN
-  Thanks to Christophe Leroy <christophe.leroy5@capway.com>
-===============================================================================
-Changes for patch v76
- Updated an email address in ChangeLog
- CONFIG_DEVFS_ONLY replaced with "only" boot option
-===============================================================================
-Changes for patch v77
- Added DEVFS_FL_REMOVABLE flag
- Check for disc change when listing directories with removable media
-  devices
- Use DEVFS_FL_REMOVABLE in sd.c
- Ported to kernel 2.1.128
-===============================================================================
-Changes for patch v78
- Only call <scan_dir_for_removable> on first call to <devfs_readdir>
- Ported to kernel 2.1.129-pre5
- ISDN support improvements
-  Thanks to Christophe Leroy <christophe.leroy5@capway.com>
-===============================================================================
-Changes for patch v79
- Ported to kernel 2.1.130
- Renamed miscdevice "apm" to "apm_bios" to be consistent with
-  devices.txt
-===============================================================================
-Changes for patch v80
- Ported to kernel 2.1.131
- Updated <devfs_rmdir> for VFS change in 2.1.131
-===============================================================================
-Changes for patch v81
- Fixed permissions on /dev/ptmx
-===============================================================================
-Changes for patch v82
- Ported to kernel 2.1.132-pre4
- Changed initial permissions on /dev/pts/*
- Created <devfs_mk_compat>
- Added "symlinks" boot option
- Changed devfs_register_blkdev() back to register_blkdev() for IDE
- Check for partitions on removable media in <devfs_lookup>
-===============================================================================
-Changes for patch v83
- Fixed support for ramdisc when using string-based root FS name
- Ported to kernel 2.2.0-pre1
-===============================================================================
-Changes for patch v84
- Ported to kernel 2.2.0-pre7
-===============================================================================
-Changes for patch v85
- Compile fixes for driver/sound/sound_common.c (non-module) and
-  drivers/isdn/isdn_common.c
-  Thanks to Christophe Leroy <christophe.leroy5@capway.com>
- Added support for registering regular files
- Created <devfs_set_file_size>
- Added /dev/cpu/mtrr as an alternative interface to /proc/mtrr
- Update devfs inodes from entries if not changed through FS
-===============================================================================
-Changes for patch v86
- Ported to kernel 2.2.0-pre9
-===============================================================================
-Changes for patch v87
- Fixed bug when mounting non-devfs devices in a devfs
-===============================================================================
-Changes for patch v88
- Fixed <devfs_fill_file> to only initialise temporary inodes
- Trap for NULL fops in <devfs_register>
- Return -ENODEV in <devfs_fill_file> for non-driver inodes
- Fixed bug when unswapping non-devfs devices in a devfs
-===============================================================================
-Changes for patch v89
- Switched to C data types in include/linux/devfs_fs.h
- Switched from PATH_MAX to DEVFS_PATHLEN
- Updated Documentation/filesystems/devfs/modules.conf to take account
-  of reverse scanning (!) by modprobe
- Ported to kernel 2.2.0
-===============================================================================
-Changes for patch v90
- CONFIG_DEVFS_DISABLE_OLD_TTY_NAMES replaced with "nottycompat" boot
-  option
- CONFIG_DEVFS_TTY_COMPAT removed: existing "symlinks" boot option now
-  controls this. This means you must have libc 5.4.44 or later, or a
-  recent version of libc 6 if you use the "symlinks" option
-===============================================================================
-Changes for patch v91
- Switch from <devfs_mk_symlink> to <devfs_mk_compat> in
-  drivers/char/vc_screen.c to fix problems with Midnight Commander
-===============================================================================
-Changes for patch v92
- Ported to kernel 2.2.2-pre5
-===============================================================================
-Changes for patch v93
- Modified <sd_name> in drivers/scsi/sd.c to cope with devices that
-  don't exist (which happens with new RAID autostart code printk()s)
-===============================================================================
-Changes for patch v94
- Fixed bug in joystick driver: only first joystick was registered
-===============================================================================
-Changes for patch v95
- Fixed another bug in joystick driver
- Fixed <devfsd_read> to not overrun event buffer
-===============================================================================
-Changes for patch v96
- Ported to kernel 2.2.5-2
- Created <devfs_auto_unregister>
- Fixed bugs: compatibility entries were not unregistered for:
-    loop driver
-    floppy driver
-    RAMDISC driver
-    IDE tape driver
-    SCSI CD-ROM driver
-    SCSI HDD driver
-===============================================================================
-Changes for patch v97
- Fixed bugs: compatibility entries were not unregistered for:
-    ALSA sound driver
-    partitions in generic disc driver
- Don't return unregistred entries in <devfs_find_handle>
- Panic in <devfs_unregister> if entry unregistered
- Don't panic in <devfs_auto_unregister> for duplicates
-===============================================================================
-Changes for patch v98
- Don't unregister already unregistered entries in <unregister>
- Register entry in <sd_detect>
- Unregister entry in <sd_detach>
- Changed to <devfs_*register_chrdev> in drivers/char/tty_io.c
- Ported to kernel 2.2.7
-===============================================================================
-Changes for patch v99
- Ported to kernel 2.2.8
- Fixed bug in drivers/scsi/sd.c when >16 SCSI discs
- Disable warning messages when unable to read partition table for
-  removable media
-===============================================================================
-Changes for patch v100
- Ported to kernel 2.3.1-pre5
- Added "oops-on-panic" boot option
- Improved debugging in <devfs_register> and <devfs_unregister>
- Register entry in <sr_detect>
- Unregister entry in <sr_detach>
- Register entry in <sg_detect>
- Unregister entry in <sg_detach>
- Added support for ALSA drivers
-===============================================================================
-Changes for patch v101
- Ported to kernel 2.3.2
-===============================================================================
-Changes for patch v102
- Update serial driver to register PCMCIA entries
-  Thanks to Roch-Alexandre Nomine-Beguin <roch@samarkand.infini.fr>
- Updated an email address in ChangeLog
- Hide virtual console capture entries from directory listings when
-  corresponding console device is not open
-===============================================================================
-Changes for patch v103
- Ported to kernel 2.3.3
-===============================================================================
-Changes for patch v104
- Added documentation for some functions
- Added "doc" target to fs/devfs/Makefile
- Added "v4l" directory for video4linux devices
- Replaced call to <devfs_unregister> in <sd_detach> with call to
-  <devfs_register_partitions>
- Moved registration for sr and sg drivers from detect() to attach()
-  methods
- Register entries in <st_attach> and unregister in <st_detach>
- Work around IDE driver treating CD-ROM as gendisk
- Use <sed> instead of <tr> in rc.devfs
- Updated ToDo list
- Removed "oops-on-panic" boot option: now always Oops
-===============================================================================
-Changes for patch v105
- Unregister SCSI host from <scsi_host_no_list> in <scsi_unregister>
-  Thanks to Zolt�n B�sz�rm�nyi <zboszor@mail.externet.hu>
- Don't save /dev/log in rc.devfs
- Ported to kernel 2.3.4-pre1
-===============================================================================
-Changes for patch v106
- Fixed silly typo in drivers/scsi/st.c
- Improved debugging in <devfs_register>
-===============================================================================
-Changes for patch v107
- Added "diunlink" and "nokmod" boot options
- Removed superfluous warning message in <devfs_d_iput>
-===============================================================================
-Changes for patch v108
- Remove entries when unloading sound module
-===============================================================================
-Changes for patch v109
- Ported to kernel 2.3.6-pre2
-===============================================================================
-Changes for patch v110
- Took account of change to <d_alloc_root>
-===============================================================================
-Changes for patch v111
- Created separate event queue for each mounted devfs
- Removed <devfs_invalidate_dcache>
- Created new ioctl()s for devfsd
- Incremented devfsd protocol revision to 3
- Fixed bug when re-creating directories: contents were lost
- Block access to inodes until devfsd updates permissions
-===============================================================================
-Changes for patch v112
- Modified patch so it applies against 2.3.5 and 2.3.6
- Updated an email address in ChangeLog
- Do not automatically change ownership/protection of /dev/tty<n>
- Updated sample modules.conf
- Switched to sending process uid/gid to devfsd
- Renamed <call_kmod> to <try_modload>
- Added DEVFSD_NOTIFY_LOOKUP event
- Added DEVFSD_NOTIFY_CHANGE event
- Added DEVFSD_NOTIFY_CREATE event
- Incremented devfsd protocol revision to 4
- Moved kernel-specific stuff to include/linux/devfs_fs_kernel.h
-===============================================================================
-Changes for patch v113
- Ported to kernel 2.3.9
- Restricted permissions on some block devices
-===============================================================================
-Changes for patch v114
- Added support for /dev/netlink
-  Thanks to Dennis Hou <smilax@mindmeld.yi.org>
- Return EISDIR rather than EINVAL for read(2) on directories
- Ported to kernel 2.3.10
-===============================================================================
-Changes for patch v115
- Added support for all remaining character devices
-  Thanks to Dennis Hou <smilax@mindmeld.yi.org>
- Cleaned up netlink support
-===============================================================================
-Changes for patch v116
- Added support for /dev/parport%d
-  Thanks to Tim Waugh <tim@cyberelk.demon.co.uk>
- Fixed parallel port ATAPI tape driver
- Fixed Atari SLM laser printer driver
-===============================================================================
-Changes for patch v117
- Added support for COSA card
-  Thanks to Dennis Hou <smilax@mindmeld.yi.org>
- Fixed drivers/char/ppdev.c: missing #include <linux/init.h>
- Fixed drivers/char/ftape/zftape/zftape-init.c
-  Thanks to Vladimir Popov <mashgrad@usa.net>
-===============================================================================
-Changes for patch v118
- Ported to kernel 2.3.15-pre3
- Fixed bug in loop driver
- Unregister /dev/lp%d entries in drivers/char/lp.c
-  Thanks to Maciej W. Rozycki <macro@ds2.pg.gda.pl>
-===============================================================================
-Changes for patch v119
- Ported to kernel 2.3.16
-===============================================================================
-Changes for patch v120
- Fixed bug in drivers/scsi/scsi.c
- Added /dev/ppp
-  Thanks to Dennis Hou <smilax@mindmeld.yi.org>
- Ported to kernel 2.3.17
-===============================================================================
-Changes for patch v121
- Fixed bug in drivers/block/loop.c
- Ported to kernel 2.3.18
-===============================================================================
-Changes for patch v122
- Ported to kernel 2.3.19
-===============================================================================
-Changes for patch v123
- Ported to kernel 2.3.20
-===============================================================================
-Changes for patch v124
- Ported to kernel 2.3.21
-===============================================================================
-Changes for patch v125
- Created <devfs_get_info>, <devfs_set_info>,
-  <devfs_get_first_child> and <devfs_get_next_sibling>
-  Added <<dir>> parameter to <devfs_register>, <devfs_mk_compat>,
-  <devfs_mk_dir> and <devfs_find_handle>
-  Work sponsored by SGI
- Fixed apparent bug in COSA driver
- Re-instated "scsihosts=" boot option
-===============================================================================
-Changes for patch v126
- Always create /dev/pts if CONFIG_UNIX98_PTYS=y
- Fixed call to <devfs_mk_dir> in drivers/block/ide-disk.c
-  Thanks to Dennis Hou <smilax@mindmeld.yi.org>
- Allow multiple unregistrations
- Created /dev/scsi hierarchy
-  Work sponsored by SGI
-===============================================================================
-Changes for patch v127
-Work sponsored by SGI
- No longer disable devpts if devfs enabled (caveat emptor)
- Added flags array to struct gendisk and removed code from
-  drivers/scsi/sd.c
- Created /dev/discs hierarchy
-===============================================================================
-Changes for patch v128
-Work sponsored by SGI
- Created /dev/cdroms hierarchy
-===============================================================================
-Changes for patch v129
-Work sponsored by SGI
- Removed compatibility entries for sound devices
- Removed compatibility entries for printer devices
- Removed compatibility entries for video4linux devices
- Removed compatibility entries for parallel port devices
- Removed compatibility entries for frame buffer devices
-===============================================================================
-Changes for patch v130
-Work sponsored by SGI
- Added major and minor number to devfsd protocol
- Incremented devfsd protocol revision to 5
- Removed compatibility entries for SoundBlaster CD-ROMs
- Removed compatibility entries for netlink devices
- Removed compatibility entries for SCSI generic devices
- Removed compatibility entries for SCSI tape devices
-===============================================================================
-Changes for patch v131
-Work sponsored by SGI
- Support info pointer for all devfs entry types
- Added <<info>> parameter to <devfs_mk_dir> and <devfs_mk_symlink>
- Removed /dev/st hierarchy
- Removed /dev/sg hierarchy
- Removed compatibility entries for loop devices
- Removed compatibility entries for IDE tape devices
- Removed compatibility entries for SCSI CD-ROMs
- Removed /dev/sr hierarchy
-===============================================================================
-Changes for patch v132
-Work sponsored by SGI
- Removed compatibility entries for floppy devices
- Removed compatibility entries for RAMDISCs
- Removed compatibility entries for meta-devices
- Removed compatibility entries for SCSI discs
- Created <devfs_make_root>
- Removed /dev/sd hierarchy
- Support "../" when searching devfs namespace
- Created /dev/ide/host* hierarchy
- Supported IDE hard discs in /dev/ide/host* hierarchy
- Removed compatibility entries for IDE discs
- Removed /dev/ide/hd hierarchy
- Supported IDE CD-ROMs in /dev/ide/host* hierarchy
- Removed compatibility entries for IDE CD-ROMs
- Removed /dev/ide/cd hierarchy
-===============================================================================
-Changes for patch v133
-Work sponsored by SGI
- Created <devfs_get_unregister_slave>
- Fixed bug in fs/partitions/check.c when rescanning
-===============================================================================
-Changes for patch v134
-Work sponsored by SGI
- Removed /dev/sd, /dev/sr, /dev/st and /dev/sg directories
- Removed /dev/ide/hd directory
- Exported <devfs_get_parent>
- Created <devfs_register_tape> and /dev/tapes hierarchy
- Removed /dev/ide/mt hierarchy
- Removed /dev/ide/fd hierarchy
- Ported to kernel 2.3.25
-===============================================================================
-Changes for patch v135
-Work sponsored by SGI
- Removed compatibility entries for virtual console capture devices
- Removed unused <devfs_set_symlink_destination>
- Removed compatibility entries for serial devices
- Removed compatibility entries for console devices
- Do not hide entries from devfsd or children
- Removed DEVFS_FL_TTY_COMPAT flag
- Removed "nottycompat" boot option
- Removed <devfs_mk_compat>
-===============================================================================
-Changes for patch v136
-Work sponsored by SGI
- Moved BSD pty devices to /dev/pty
- Added DEVFS_FL_WAIT flag
-===============================================================================
-Changes for patch v137
-Work sponsored by SGI
- Really fixed bug in fs/partitions/check.c when rescanning
- Support new "disc" naming scheme in <get_removable_partition>
- Allow NULL fops in <devfs_register>
- Removed redundant name functions in SCSI disc and IDE drivers
-===============================================================================
-Changes for patch v138
-Work sponsored by SGI
- Fixed old bugs in drivers/block/paride/pt.c, drivers/char/tpqic02.c,
-  drivers/net/wan/cosa.c and drivers/scsi/scsi.c
-  Thanks to Sergey Kubushin <ksi@ksi-linux.com>
- Fall back to major table if NULL fops given to <devfs_register>
-===============================================================================
-Changes for patch v139
-Work sponsored by SGI
- Corrected and moved <get_blkfops> and <get_chrfops> declarations
-  from arch/alpha/kernel/osf_sys.c to include/linux/fs.h
- Removed name function from struct gendisk
- Updated devfs FAQ
-===============================================================================
-Changes for patch v140
-Work sponsored by SGI
- Ported to kernel 2.3.27
-===============================================================================
-Changes for patch v141
-Work sponsored by SGI
- Bug fix in arch/m68k/atari/joystick.c
- Moved ISDN and capi devices to /dev/isdn
-===============================================================================
-Changes for patch v142
-Work sponsored by SGI
- Bug fix in drivers/block/ide-probe.c (patch confusion)
-===============================================================================
-Changes for patch v143
-Work sponsored by SGI
- Bug fix in drivers/block/blkpg.c:partition_name()
-===============================================================================
-Changes for patch v144
-Work sponsored by SGI
- Ported to kernel 2.3.29
- Removed calls to <devfs_register> from cdu31a, cm206, mcd and mcdx
-  CD-ROM drivers: generic driver handles this now
- Moved joystick devices to /dev/joysticks
-===============================================================================
-Changes for patch v145
-Work sponsored by SGI
- Ported to kernel 2.3.30-pre3
- Register whole-disc entry even for invalid partition tables
- Fixed bug in mounting root FS when initrd enabled
- Fixed device entry leak with IDE CD-ROMs
- Fixed compile problem with drivers/isdn/isdn_common.c
- Moved COSA devices to /dev/cosa
- Support fifos when unregistering
- Created <devfs_register_series> and used in many drivers
- Moved Coda devices to /dev/coda
- Moved parallel port IDE tapes to /dev/pt
- Moved parallel port IDE generic devices to /dev/pg
-===============================================================================
-Changes for patch v146
-Work sponsored by SGI
- Removed obsolete DEVFS_FL_COMPAT and DEVFS_FL_TOLERANT flags
- Fixed compile problem with fs/coda/psdev.c
- Reinstate change to <devfs_register_blkdev> in
-  drivers/block/ide-probe.c now that fs/isofs/inode.c is fixed
- Switched to <devfs_register_blkdev> in drivers/block/floppy.c,
-  drivers/scsi/sr.c and drivers/block/md.c
- Moved DAC960 devices to /dev/dac960
-===============================================================================
-Changes for patch v147
-Work sponsored by SGI
- Ported to kernel 2.3.32-pre4
-===============================================================================
-Changes for patch v148
-Work sponsored by SGI
- Removed kmod support: use devfsd instead
- Moved miscellaneous character devices to /dev/misc
-===============================================================================
-Changes for patch v149
-Work sponsored by SGI
- Ensure include/linux/joystick.h is OK for user-space
- Improved debugging in <get_vfs_inode>
- Ensure dentries created by devfsd will be cleaned up
-===============================================================================
-Changes for patch v150
-Work sponsored by SGI
- Ported to kernel 2.3.34
-===============================================================================
-Changes for patch v151
-Work sponsored by SGI
- Ported to kernel 2.3.35-pre1
- Created <devfs_get_name>
-===============================================================================
-Changes for patch v152
-Work sponsored by SGI
- Updated sample modules.conf
- Ported to kernel 2.3.36-pre1
-===============================================================================
-Changes for patch v153
-Work sponsored by SGI
- Ported to kernel 2.3.42
- Removed <devfs_fill_file>
-===============================================================================
-Changes for patch v154
-Work sponsored by SGI
- Took account of device number changes for /dev/fb*
-===============================================================================
-Changes for patch v155
-Work sponsored by SGI
- Ported to kernel 2.3.43-pre8
- Moved /dev/tty0 to /dev/vc/0
- Moved sequence number formatting from <_tty_make_name> to drivers
-===============================================================================
-Changes for patch v156
-Work sponsored by SGI
- Fixed breakage in drivers/scsi/sd.c due to recent SCSI changes
-===============================================================================
-Changes for patch v157
-Work sponsored by SGI
- Ported to kernel 2.3.45
-===============================================================================
-Changes for patch v158
-Work sponsored by SGI
- Ported to kernel 2.3.46-pre2
-===============================================================================
-Changes for patch v159
-Work sponsored by SGI
- Fixed drivers/block/md.c
-  Thanks to Mike Galbraith <mikeg@weiden.de>
- Documentation fixes
- Moved device registration from <lp_init> to <lp_register>
-  Thanks to Tim Waugh <twaugh@redhat.com>
-===============================================================================
-Changes for patch v160
-Work sponsored by SGI
- Fixed drivers/char/joystick/joystick.c
-  Thanks to Vojtech Pavlik <vojtech@suse.cz>
- Documentation updates
- Fixed arch/i386/kernel/mtrr.c if procfs and devfs not enabled
- Fixed drivers/char/stallion.c
-===============================================================================
-Changes for patch v161
-Work sponsored by SGI
- Remove /dev/ide when ide-mod is unloaded
- Fixed bug in drivers/block/ide-probe.c when secondary but no primary
- Added DEVFS_FL_NO_PERSISTENCE flag
- Used new DEVFS_FL_NO_PERSISTENCE flag for Unix98 pty slaves
- Removed unnecessary call to <update_devfs_inode_from_entry> in
-  <devfs_readdir>
- Only set auto-ownership for /dev/pty/s*
-===============================================================================
-Changes for patch v162
-Work sponsored by SGI
- Set inode->i_size to correct size for symlinks
-  Thanks to Jeremy Fitzhardinge <jeremy@goop.org>
- Only give lookup() method to directories to comply with new VFS
-  assumptions
- Remove unnecessary tests in symlink methods
- Don't kill existing block ops in <devfs_read_inode>
- Restore auto-ownership for /dev/pty/m*
-===============================================================================
-Changes for patch v163
-Work sponsored by SGI
- Don't create missing directories in <devfs_find_handle>
- Removed Documentation/filesystems/devfs/mk-devlinks
- Updated Documentation/filesystems/devfs/README
-===============================================================================
-Changes for patch v164
-Work sponsored by SGI
- Fixed CONFIG_DEVFS breakage in drivers/char/serial.c introduced in
-  linux-2.3.99-pre6-7
-===============================================================================
-Changes for patch v165
-Work sponsored by SGI
- Ported to kernel 2.3.99-pre6
-===============================================================================
-Changes for patch v166
-Work sponsored by SGI
- Added CONFIG_DEVFS_MOUNT
-===============================================================================
-Changes for patch v167
-Work sponsored by SGI
- Updated Documentation/filesystems/devfs/README
- Updated sample modules.conf
-===============================================================================
-Changes for patch v168
-Work sponsored by SGI
- Disabled multi-mount capability (use VFS bindings instead)
- Updated README from master HTML file
-===============================================================================
-Changes for patch v169
-Work sponsored by SGI
- Removed multi-mount code
- Removed compatibility macros: VFS has changed too much
-===============================================================================
-Changes for patch v170
-Work sponsored by SGI
- Updated README from master HTML file
- Merged devfs inode into devfs entry
-===============================================================================
-Changes for patch v171
-Work sponsored by SGI
- Updated sample modules.conf
- Removed dead code in <devfs_register> which used to call
-  <free_dentries>
- Ported to kernel 2.4.0-test2-pre3
-===============================================================================
-Changes for patch v172
-Work sponsored by SGI
- Changed interface to <devfs_register>
- Changed interface to <devfs_register_series>
-===============================================================================
-Changes for patch v173
-Work sponsored by SGI
- Simplified interface to <devfs_mk_symlink>
- Simplified interface to <devfs_mk_dir>
- Simplified interface to <devfs_find_handle>
-===============================================================================
-Changes for patch v174
-Work sponsored by SGI
- Updated README from master HTML file
-===============================================================================
-Changes for patch v175
-Work sponsored by SGI
- DocBook update for fs/devfs/base.c
-  Thanks to Tim Waugh <twaugh@redhat.com>
- Removed stale fs/tunnel.c (was never used or completed)
-===============================================================================
-Changes for patch v176
-Work sponsored by SGI
- Updated ToDo list
- Removed sample modules.conf: now distributed with devfsd
- Updated README from master HTML file
- Ported to kernel 2.4.0-test3-pre4 (which had devfs-patch-v174)
-===============================================================================
-Changes for patch v177
- Updated README from master HTML file
- Documentation cleanups
- Ensure <devfs_generate_path> terminates string for root entry
-  Thanks to Tim Jansen <tim@tjansen.de>
- Exported <devfs_get_name> to modules
- Make <devfs_mk_symlink> send events to devfsd
- Cleaned up option processing in <devfs_setup>
- Fixed bugs in handling symlinks: could leak or cause Oops
- Cleaned up directory handling by separating fops
-  Thanks to Alexander Viro <viro@parcelfarce.linux.theplanet.co.uk>
-===============================================================================
-Changes for patch v178
- Fixed handling of inverted options in <devfs_setup>
-===============================================================================
-Changes for patch v179
- Adjusted <try_modload> to account for <devfs_generate_path> fix
-===============================================================================
-Changes for patch v180
- Fixed !CONFIG_DEVFS_FS stub declaration of <devfs_get_info>
-===============================================================================
-Changes for patch v181
- Answered question posed by Al Viro and removed his comments from <devfs_open>
- Moved setting of registered flag after other fields are changed
- Fixed race between <devfsd_close> and <devfsd_notify_one>
- Global VFS changes added bogus BKL to devfsd_close(): removed
- Widened locking in <devfs_readlink> and <devfs_follow_link>
- Replaced <devfsd_read> stack usage with <devfsd_ioctl> kmalloc
- Simplified locking in <devfsd_ioctl> and fixed memory leak
-===============================================================================
-Changes for patch v182
- Created <devfs_*alloc_major> and <devfs_*alloc_devnum>
- Removed broken devnum allocation and use <devfs_alloc_devnum>
- Fixed old devnum leak by calling new <devfs_dealloc_devnum>
- Created <devfs_*alloc_unique_number>
- Fixed number leak for /dev/cdroms/cdrom%d
- Fixed number leak for /dev/discs/disc%d
-===============================================================================
-Changes for patch v183
- Fixed bug in <devfs_setup> which could hang boot process
-===============================================================================
-Changes for patch v184
- Documentation typo fix for fs/devfs/util.c
- Fixed drivers/char/stallion.c for devfs
- Added DEVFSD_NOTIFY_DELETE event
- Updated README from master HTML file
- Removed #include <asm/segment.h> from fs/devfs/base.c
-===============================================================================
-Changes for patch v185
- Made <block_semaphore> and <char_semaphore> in fs/devfs/util.c
-  private
- Fixed inode table races by removing it and using inode->u.generic_ip
-  instead
- Moved <devfs_read_inode> into <get_vfs_inode>
- Moved <devfs_write_inode> into <devfs_notify_change>
-===============================================================================
-Changes for patch v186
- Fixed race in <devfs_do_symlink> for uni-processor
- Updated README from master HTML file
-===============================================================================
-Changes for patch v187
- Fixed drivers/char/stallion.c for devfs
- Fixed drivers/char/rocket.c for devfs
- Fixed bug in <devfs_alloc_unique_number>: limited to 128 numbers
-===============================================================================
-Changes for patch v188
- Updated major masks in fs/devfs/util.c up to Linus' "no new majors"
-  proclamation. Block: were 126 now 122 free, char: were 26 now 19 free
- Updated README from master HTML file
- Removed remnant of multi-mount support in <devfs_mknod>
- Removed unused DEVFS_FL_SHOW_UNREG flag
-===============================================================================
-Changes for patch v189
- Removed nlink field from struct devfs_inode
- Removed auto-ownership for /dev/pty/* (BSD ptys) and used
-  DEVFS_FL_CURRENT_OWNER|DEVFS_FL_NO_PERSISTENCE for /dev/pty/s* (just
-  like Unix98 pty slaves) and made /dev/pty/m* rw-rw-rw- access
-===============================================================================
-Changes for patch v190
- Updated README from master HTML file
- Replaced BKL with global rwsem to protect symlink data (quick and
-  dirty hack)
-===============================================================================
-Changes for patch v191
- Replaced global rwsem for symlink with per-link refcount
-===============================================================================
-Changes for patch v192
- Removed unnecessary #ifdef CONFIG_DEVFS_FS from arch/i386/kernel/mtrr.c
- Ported to kernel 2.4.10-pre11
- Set inode->i_mapping->a_ops for block nodes in <get_vfs_inode>
-===============================================================================
-Changes for patch v193
- Went back to global rwsem for symlinks (refcount scheme no good)
-===============================================================================
-Changes for patch v194
- Fixed overrun in <devfs_link> by removing function (not needed)
- Updated README from master HTML file
-===============================================================================
-Changes for patch v195
- Fixed buffer underrun in <try_modload>
- Moved down_read() from <search_for_entry_in_dir> to <find_entry>
-===============================================================================
-Changes for patch v196
- Fixed race in <devfsd_ioctl> when setting event mask
-  Thanks to Kari Hurtta <hurtta@leija.mh.fmi.fi>
- Avoid deadlock in <devfs_follow_link> by using temporary buffer
-===============================================================================
-Changes for patch v197
- First release of new locking code for devfs core (v1.0)
- Fixed bug in drivers/cdrom/cdrom.c
-===============================================================================
-Changes for patch v198
- Discard temporary buffer, now use "%s" for dentry names
- Don't generate path in <try_modload>: use fake entry instead
- Use "existing" directory in <_devfs_make_parent_for_leaf>
- Use slab cache rather than fixed buffer for devfsd events
-===============================================================================
-Changes for patch v199
- Removed obsolete usage of DEVFS_FL_NO_PERSISTENCE
- Send DEVFSD_NOTIFY_REGISTERED events in <devfs_mk_dir>
- Fixed locking bug in <devfs_d_revalidate_wait> due to typo
- Do not send CREATE, CHANGE, ASYNC_OPEN or DELETE events from devfsd
-  or children
-===============================================================================
-Changes for patch v200
- Ported to kernel 2.5.1-pre2
-===============================================================================
-Changes for patch v201
- Fixed bug in <devfsd_read>: was dereferencing freed pointer
-===============================================================================
-Changes for patch v202
- Fixed bug in <devfsd_close>: was dereferencing freed pointer
- Added process group check for devfsd privileges
-===============================================================================
-Changes for patch v203
- Use SLAB_ATOMIC in <devfsd_notify_de> from <devfs_d_delete>
-===============================================================================
-Changes for patch v204
- Removed long obsolete rc.devfs
- Return old entry in <devfs_mk_dir> for 2.4.x kernels
- Updated README from master HTML file
- Increment refcount on module in <check_disc_changed>
- Created <devfs_get_handle> and exported <devfs_put>
- Increment refcount on module in <devfs_get_ops>
- Created <devfs_put_ops> and used where needed to fix races
- Added clarifying comments in response to preliminary EMC code review
- Added poisoning to <devfs_put>
- Improved debugging messages
- Fixed unregister bugs in drivers/md/lvm-fs.c
-===============================================================================
-Changes for patch v205
- Corrected (made useful) debugging message in <unregister>
- Moved <kmem_cache_create> in <mount_devfs_fs> to <init_devfs_fs>
- Fixed drivers/md/lvm-fs.c to create "lvm" entry
- Added magic number to guard against scribbling drivers
- Only return old entry in <devfs_mk_dir> if a directory
- Defined macros for error and debug messages
- Updated README from master HTML file
-===============================================================================
-Changes for patch v206
- Added support for multiple Compaq cpqarray controllers
- Fixed (rare, old) race in <devfs_lookup>
-===============================================================================
-Changes for patch v207
- Fixed deadlock bug in <devfs_d_revalidate_wait>
- Tag VFS deletable in <devfs_mk_symlink> if handle ignored
- Updated README from master HTML file
-===============================================================================
-Changes for patch v208
- Added KERN_* to remaining messages
- Cleaned up declaration of <stat_read>
- Updated README from master HTML file
-===============================================================================
-Changes for patch v209
- Updated README from master HTML file
- Removed silently introduced calls to lock_kernel() and
-  unlock_kernel() due to recent VFS locking changes. BKL isn't
-  required in devfs 
- Changed <devfs_rmdir> to allow later additions if not yet empty
- Added calls to <devfs_register_partitions> in drivers/block/blkpc.c
-  <add_partition> and <del_partition>
- Fixed bug in <devfs_alloc_unique_number>: was clearing beyond
-  bitfield
- Fixed bitfield data type for <devfs_*alloc_devnum>
- Made major bitfield type and initialiser 64 bit safe
-===============================================================================
-Changes for patch v210
- Updated fs/devfs/util.c to fix shift warning on 64 bit machines
-  Thanks to Anton Blanchard <anton@samba.org>
- Updated README from master HTML file
-===============================================================================
-Changes for patch v211
- Do not put miscellaneous character devices in /dev/misc if they
-  specify their own directory (i.e. contain a '/' character)
- Copied macro for error messages from fs/devfs/base.c to
-  fs/devfs/util.c and made use of this macro
- Removed 2.4.x compatibility code from fs/devfs/base.c
-===============================================================================
-Changes for patch v212
- Added BKL to <devfs_open> because drivers still need it
-===============================================================================
-Changes for patch v213
- Protected <scan_dir_for_removable> and <get_removable_partition>
-  from changing directory contents
-===============================================================================
-Changes for patch v214
- Switched to ISO C structure field initialisers
- Switch to set_current_state() and move before add_wait_queue()
- Updated README from master HTML file
- Fixed devfs entry leak in <devfs_readdir> when *readdir fails
-===============================================================================
-Changes for patch v215
- Created <devfs_find_and_unregister>
- Switched many functions from <devfs_find_handle> to
-  <devfs_find_and_unregister>
- Switched many functions from <devfs_find_handle> to <devfs_get_handle>
-===============================================================================
-Changes for patch v216
- Switched arch/ia64/sn/io/hcl.c from <devfs_find_handle> to
-  <devfs_get_handle>
- Removed deprecated <devfs_find_handle>
-===============================================================================
-Changes for patch v217
- Exported <devfs_find_and_unregister> and <devfs_only> to modules
- Updated README from master HTML file
- Fixed module unload race in <devfs_open>
-===============================================================================
-Changes for patch v218
- Removed DEVFS_FL_AUTO_OWNER flag
- Switched lingering structure field initialiser to ISO C
- Added locking when setting/clearing flags
- Documentation fix in fs/devfs/util.c
diff --git a/Documentation/filesystems/devfs/README b/Documentation/filesystems/devfs/README
deleted file mode 100644
index aabfba24bc2e..000000000000
--- a/Documentation/filesystems/devfs/README
+++ /dev/null
@@ -1,1959 +0,0 @@
-Devfs (Device File System) FAQ
-Linux Devfs (Device File System) FAQ
-Richard Gooch
-20-AUG-2002
-Document languages:
-----------------------------------------------------------------------------
-NOTE: the master copy of this document is available online at:
-http://www.atnf.csiro.au/~rgooch/linux/docs/devfs.html
-and looks much better than the text version distributed with the
-kernel sources. A mirror site is available at:
-http://www.ras.ucalgary.ca/~rgooch/linux/docs/devfs.html
-There is also an optional daemon that may be used with devfs. You can
-find out more about it at:
-http://www.atnf.csiro.au/~rgooch/linux/
-A mailing list is available which you may subscribe to. Send
-email
-to majordomo@oss.sgi.com with the following line in the
-body of the message:
-subscribe devfs
-To unsubscribe, send the message body:
-unsubscribe devfs
-instead. The list is archived at
-http://oss.sgi.com/projects/devfs/archive/.
-----------------------------------------------------------------------------
-Contents
-What is it?
-Why do it?
-Who else does it?
-How it works
-Operational issues (essential reading)
-Instructions for the impatient
-Permissions persistence across reboots
-Dealing with drivers without devfs support
-All the way with Devfs
-Other Issues
-Kernel Naming Scheme
-Devfsd Naming Scheme
-Old Compatibility Names
-SCSI Host Probing Issues
-Device drivers currently ported
-Allocation of Device Numbers
-Questions and Answers
-Making things work
-Alternatives to devfs
-What I don't like about devfs
-How to report bugs
-Strange kernel messages
-Compilation problems with devfsd
-Other resources
-Translations of this document
-----------------------------------------------------------------------------
-What is it?
-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
-devfs automatically, with whatever default ownership and
-protection the driver specified. A daemon (devfsd) can be used to
-override these defaults. Devfs has been in the kernel since 2.3.46.
-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.  ALSO NOTE that if you do
-enable devfs, the defaults are such that full compatibility is
-maintained with the old devices names.
-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. The reason I make a distinction is because devfs
-can be mounted many times, with each mount showing the same device
-namespace. Changes made are global to all mounted devfs filesystems.
-Also, because the devfs namespace exists without any devfs mounts, you
-can easily mount the root filesystem by referring to an entry in the
-devfs namespace.
-The cost of devfs is a small increase in kernel code size and memory
-usage. About 7 pages of code (some of that in __init sections) and 72
-bytes for each entry in the namespace. A modest system has only a
-couple of hundred device entries, so this costs a few more
-pages. Compare this with the suggestion to put /dev on a <a
-href="#why-faq-ramdisc">ramdisc.
-On a typical machine, the cost is under 0.2 percent. On a modest
-system with 64 MBytes of RAM, the cost is under 0.1 percent.  The
-accusations of "bloatware" levelled at devfs are not justified.
-----------------------------------------------------------------------------
-Why do it?
-There are several problems that devfs addresses. Some of these
-problems are more serious than others (depending on your point of
-view), and some can be solved without devfs. However, the totality of
-these problems really calls out for devfs.
-The choice is a patchwork of inefficient user space solutions, which
-are complex and likely to be fragile, or to use a simple and efficient
-devfs which is robust.
-There have been many counter-proposals to devfs, all seeking to
-provide some of the benefits without actually implementing devfs. So
-far there has been an absence of code and no proposed alternative has
-been able to provide all the features that devfs does. Further,
-alternative proposals require far more complexity in user-space (and
-still deliver less functionality than devfs). Some people have the
-mantra of reducing "kernel bloat", but don't consider the effects on
-user-space.
-A good solution limits the total complexity of kernel-space and
-user-space.
-Major&minor allocation
-The existing scheme requires the allocation of major and minor device
-numbers for each and every device. This means that a central
-co-ordinating authority is required to issue these device numbers
-(unless you're developing a "private" device driver), in order to
-preserve uniqueness. Devfs shifts the burden to a namespace. This may
-not seem like a huge benefit, but actually it is. Since driver authors
-will naturally choose a device name which reflects the functionality
-of the device, there is far less potential for namespace conflict.
-Solving this requires a kernel change.
-/dev management
-Because you currently access devices through device nodes, these must
-be created by the system administrator. For standard devices you can
-usually find a MAKEDEV programme which creates all these (hundreds!)
-of nodes. This means that changes in the kernel must be reflected by
-changes in the MAKEDEV programme, or else the system administrator
-creates device nodes by hand.
-The basic problem is that there are two separate databases of
-major and minor numbers. One is in the kernel and one is in /dev (or
-in a MAKEDEV programme, if you want to look at it that way). This is
-duplication of information, which is not good practice.
-Solving this requires a kernel change.
-/dev growth
-A typical /dev has over 1200 nodes! Most of these devices simply don't
-exist because the hardware is not available. A huge /dev increases the
-time to access devices (I'm just referring to the dentry lookup times
-and the time taken to read inodes off disc: the next subsection shows
-some more horrors).
-An example of how big /dev can grow is if we consider SCSI devices:
-host           6  bits  (say up to 64 hosts on a really big machine)
-channel        4  bits  (say up to 16 SCSI buses per host)
-id             4  bits
-lun            3  bits
-partition      6  bits
-TOTAL          23 bits
-This requires 8 Mega (1024*1024) inodes if we want to store all
-possible device nodes. Even if we scrap everything but id,partition
-and assume a single host adapter with a single SCSI bus and only one
-logical unit per SCSI target (id), that's still 10 bits or 1024
-inodes. Each VFS inode takes around 256 bytes (kernel 2.1.78), so
-that's 256 kBytes of inode storage on disc (assuming real inodes take
-a similar amount of space as VFS inodes). This is actually not so bad,
-because disc is cheap these days. Embedded systems would care about
-256 kBytes of /dev inodes, but you could argue that embedded systems
-would have hand-tuned /dev directories. I've had to do just that on my
-embedded systems, but I would rather just leave it to devfs.
-Another issue is the time taken to lookup an inode when first
-referenced. Not only does this take time in scanning through a list in
-memory, but also the seek times to read the inodes off disc.
-This could be solved in user-space using a clever programme which
-scanned the kernel logs and deleted /dev entries which are not
-available and created them when they were available. This programme
-would need to be run every time a new module was loaded, which would
-slow things down a lot.
-There is an existing programme called scsidev which will automatically
-create device nodes for SCSI devices. It can do this by scanning files
-in /proc/scsi. Unfortunately, to extend this idea to other device
-nodes would require significant modifications to existing drivers (so
-they too would provide information in /proc). This is a non-trivial
-change (I should know: devfs has had to do something similar). Once
-you go to this much effort, you may as well use devfs itself (which
-also provides this information).  Furthermore, such a system would
-likely be implemented in an ad-hoc fashion, as different drivers will
-provide their information in different ways.
-Devfs is much cleaner, because it (naturally) has a uniform mechanism
-to provide this information: the device nodes themselves!
-Node to driver file_operations translation
-There is an important difference between the way disc-based character
-and block nodes and devfs entries make the connection between an entry
-in /dev and the actual device driver.
-With the current 8 bit major and minor numbers the connection between
-disc-based c&b nodes and per-major drivers is done through a
-fixed-length table of 128 entries. The various filesystem types set
-the inode operations for c&b nodes to {chr,blk}dev_inode_operations,
-so when a device is opened a few quick levels of indirection bring us
-to the driver file_operations.
-For miscellaneous character devices a second step is required: there
-is a scan for the driver entry with the same minor number as the file
-that was opened, and the appropriate minor open method is called. This
-scanning is done *every time* you open a device node. Potentially, you
-may be searching through dozens of misc. entries before you find your
-open method. While not an enormous performance overhead, this does
-seem pointless.
-Linux *must* move beyond the 8 bit major and minor barrier,
-somehow. If we simply increase each to 16 bits, then the indexing
-scheme used for major driver lookup becomes untenable, because the
-major tables (one each for character and block devices) would need to
-be 64 k entries long (512 kBytes on x86, 1 MByte for 64 bit
-systems). So we would have to use a scheme like that used for
-miscellaneous character devices, which means the search time goes up
-linearly with the average number of major device drivers on your
-system. Not all "devices" are hardware, some are higher-level drivers
-like KGI, so you can get more "devices" without adding hardware
-You can improve this by creating an ordered (balanced:-)
-binary tree, in which case your search time becomes log(N).
-Alternatively, you can use hashing to speed up the search.
-But why do that search at all if you don't have to? Once again, it
-seems pointless.
-Note that devfs doesn't use the major&minor system. For devfs
-entries, the connection is done when you lookup the /dev entry. When
-devfs_register() is called, an internal table is appended which has
-the entry name and the file_operations. If the dentry cache doesn't
-have the /dev entry already, this internal table is scanned to get the
-file_operations, and an inode is created. If the dentry cache already
-has the entry, there is *no lookup time* (other than the dentry scan
-itself, but we can't avoid that anyway, and besides Linux dentries
-cream other OS's which don't have them:-). Furthermore, the number of
-node entries in a devfs is only the number of available device
-entries, not the number of *conceivable* entries. Even if you remove
-unnecessary entries in a disc-based /dev, the number of conceivable
-entries remains the same: you just limit yourself in order to save
-space.
-Devfs provides a fast connection between a VFS node and the device
-driver, in a scalable way.
-/dev as a system administration tool
-Right now /dev contains a list of conceivable devices, most of which I
-don't have. Devfs only shows those devices available on my
-system. This means that listing /dev is a handy way of checking what
-devices are available.
-Major&minor size
-Existing major and minor numbers are limited to 8 bits each. This is
-now a limiting factor for some drivers, particularly the SCSI disc
-driver, which consumes a single major number. Only 16 discs are
-supported, and each disc may have only 15 partitions. Maybe this isn't
-a problem for you, but some of us are building huge Linux systems with
-disc arrays. With devfs an arbitrary pointer can be associated with
-each device entry, which can be used to give an effective 32 bit
-device identifier (i.e. that's like having a 32 bit minor
-number). Since this is private to the kernel, there are no C library
-compatibility issues which you would have with increasing major and
-minor number sizes. See the section on "Allocation of Device Numbers"
-for details on maintaining compatibility with userspace.
-Solving this requires a kernel change.
-Since writing this, the kernel has been modified so that the SCSI disc
-driver has more major numbers allocated to it and now supports up to
-128 discs. Since these major numbers are non-contiguous (a result of
-unplanned expansion), the implementation is a little more cumbersome
-than originally.
-Just like the changes to IPv4 to fix impending limitations in the
-address space, people find ways around the limitations. In the long
-run, however, solutions like IPv6 or devfs can't be put off forever.
-Read-only root filesystem
-Having your device nodes on the root filesystem means that you can't
-operate properly with a read-only root filesystem. This is because you
-want to change ownerships and protections of tty devices. Existing
-practice prevents you using a CD-ROM as your root filesystem for a
-*real* system. Sure, you can boot off a CD-ROM, but you can't change
-tty ownerships, so it's only good for installing.
-Also, you can't use a shared NFS root filesystem for a cluster of
-discless Linux machines (having tty ownerships changed on a common
-/dev is not good). Nor can you embed your root filesystem in a
-ROM-FS.
-You can get around this by creating a RAMDISC at boot time, making
-an ext2 filesystem in it, mounting it somewhere and copying the
-contents of /dev into it, then unmounting it and mounting it over
-/dev.
-A devfs is a cleaner way of solving this.
-Non-Unix root filesystem
-Non-Unix filesystems (such as NTFS) can't be used for a root
-filesystem because they variously don't support character and block
-special files or symbolic links. You can't have a separate disc-based
-or RAMDISC-based filesystem mounted on /dev because you need device
-nodes before you can mount these. Devfs can be mounted without any
-device nodes. Devlinks won't work because symlinks aren't supported.
-An alternative solution is to use initrd to mount a RAMDISC initial
-root filesystem (which is populated with a minimal set of device
-nodes), and then construct a new /dev in another RAMDISC, and finally
-switch to your non-Unix root filesystem. This requires clever boot
-scripts and a fragile and conceptually complex boot procedure.
-Devfs solves this in a robust and conceptually simple way.
-PTY security
-Current pseudo-tty (pty) devices are owned by root and read-writable
-by everyone. The user of a pty-pair cannot change
-ownership/protections without being suid-root.
-This could be solved with a secure user-space daemon which runs as
-root and does the actual creation of pty-pairs. Such a daemon would
-require modification to *every* programme that wants to use this new
-mechanism. It also slows down creation of pty-pairs.
-An alternative is to create a new open_pty() syscall which does much
-the same thing as the user-space daemon. Once again, this requires
-modifications to pty-handling programmes.
-The devfs solution allows a device driver to "tag" certain device
-files so that when an unopened device is opened, the ownerships are
-changed to the current euid and egid of the opening process, and the
-protections are changed to the default registered by the driver. When
-the device is closed ownership is set back to root and protections are
-set back to read-write for everybody. No programme need be changed.
-The devpts filesystem provides this auto-ownership feature for Unix98
-ptys. It doesn't support old-style pty devices, nor does it have all
-the other features of devfs.
-Intelligent device management
-Devfs implements a simple yet powerful protocol for communication with
-a device management daemon (devfsd) which runs in user space. It is
-possible to send a message (either synchronously or asynchronously) to
-devfsd on any event, such as registration/unregistration of device
-entries, opening and closing devices, looking up inodes, scanning
-directories and more. This has many possibilities. Some of these are
-already implemented. See:
-http://www.atnf.csiro.au/~rgooch/linux/
-Device entry registration events can be used by devfsd to change
-permissions of newly-created device nodes. This is one mechanism to
-control device permissions.
-Device entry registration/unregistration events can be used to run
-programmes or scripts. This can be used to provide automatic mounting
-of filesystems when a new block device media is inserted into the
-drive.
-Asynchronous device open and close events can be used to implement
-clever permissions management. For example, the default permissions on
-/dev/dsp do not allow everybody to read from the device. This is
-sensible, as you don't want some remote user recording what you say at
-your console. However, the console user is also prevented from
-recording. This behaviour is not desirable. With asynchronous device
-open and close events, you can have devfsd run a programme or script
-when console devices are opened to change the ownerships for *other*
-device nodes (such as /dev/dsp). On closure, you can run a different
-script to restore permissions. An advantage of this scheme over
-modifying the C library tty handling is that this works even if your
-programme crashes (how many times have you seen the utmp database with
-lingering entries for non-existent logins?).
-Synchronous device open events can be used to perform intelligent
-device access protections. Before the device driver open() method is
-called, the daemon must first validate the open attempt, by running an
-external programme or script. This is far more flexible than access
-control lists, as access can be determined on the basis of other
-system conditions instead of just the UID and GID.
-Inode lookup events can be used to authenticate module autoload
-requests. Instead of using kmod directly, the event is sent to
-devfsd which can implement an arbitrary authentication before loading
-the module itself.
-Inode lookup events can also be used to construct arbitrary
-namespaces, without having to resort to populating devfs with symlinks
-to devices that don't exist.
-Speculative Device Scanning
-Consider an application (like cdparanoia) that wants to find all
-CD-ROM devices on the system (SCSI, IDE and other types), whether or
-not their respective modules are loaded. The application must
-speculatively open certain device nodes (such as /dev/sr0 for the SCSI
-CD-ROMs) in order to make sure the module is loaded. This requires
-that all Linux distributions follow the standard device naming scheme
-(last time I looked RedHat did things differently). Devfs solves the
-naming problem.
-The same application also wants to see which devices are actually
-available on the system. With the existing system it needs to read the
-/dev directory and speculatively open each /dev/sr* device to
-determine if the device exists or not. With a large /dev this is an
-inefficient operation, especially if there are many /dev/sr* nodes. A
-solution like scsidev could reduce the number of /dev/sr* entries (but
-of course that also requires all that inefficient directory scanning).
-With devfs, the application can open the /dev/sr directory
-(which triggers the module autoloading if required), and proceed to
-read /dev/sr. Since only the available devices will have
-entries, there are no inefficencies in directory scanning or device
-openings.
-----------------------------------------------------------------------------
-Who else does it?
-FreeBSD has a devfs implementation. Solaris and AIX each have a
-pseudo-devfs (something akin to scsidev but for all devices, with some
-unspecified kernel support). BeOS, Plan9 and QNX also have it. SGI's
-IRIX 6.4 and above also have a device filesystem.
-While we shouldn't just automatically do something because others do
-it, we should not ignore the work of others either. FreeBSD has a lot
-of competent people working on it, so their opinion should not be
-blithely ignored.
-----------------------------------------------------------------------------
-How it works
-Registering device entries
-For every entry (device node) in a devfs-based /dev a driver must call
-devfs_register(). This adds the name of the device entry, the
-file_operations structure pointer and a few other things to an
-internal table. Device entries may be added and removed at any
-time. When a device entry is registered, it automagically appears in
-any mounted devfs'.
-Inode lookup
-When a lookup operation on an entry is performed and if there is no
-driver information for that entry devfs will attempt to call
-devfsd. If still no driver information can be found then a negative
-dentry is yielded and the next stage operation will be called by the
-VFS (such as create() or mknod() inode methods). If driver information
-can be found, an inode is created (if one does not exist already) and
-all is well.
-Manually creating device nodes
-The mknod() method allows you to create an ordinary named pipe in the
-devfs, or you can create a character or block special inode if one
-does not already exist. You may wish to create a character or block
-special inode so that you can set permissions and ownership. Later, if
-a device driver registers an entry with the same name, the
-permissions, ownership and times are retained. This is how you can set
-the protections on a device even before the driver is loaded. Once you
-create an inode it appears in the directory listing.
-Unregistering device entries
-A device driver calls devfs_unregister() to unregister an entry.
-Chroot() gaols
-2.2.x kernels
-The semantics of inode creation are different when devfs is mounted
-with the "explicit" option. Now, when a device entry is registered, it
-will not appear until you use mknod() to create the device. It doesn't
-matter if you mknod() before or after the device is registered with
-devfs_register(). The purpose of this behaviour is to support
-chroot(2) gaols, where you want to mount a minimal devfs inside the
-gaol. Only the devices you specifically want to be available (through
-your mknod() setup) will be accessible.
-2.4.x kernels
-As of kernel 2.3.99, the VFS has had the ability to rebind parts of
-the global filesystem namespace into another part of the namespace.
-This now works even at the leaf-node level, which means that
-individual files and device nodes may be bound into other parts of the
-namespace. This is like making links, but better, because it works
-across filesystems (unlike hard links) and works through chroot()
-gaols (unlike symbolic links).
-Because of these improvements to the VFS, the multi-mount capability
-in devfs is no longer needed. The administrator may create a minimal
-device tree inside a chroot(2) gaol by using VFS bindings. As this
-provides most of the features of the devfs multi-mount capability, I
-removed the multi-mount support code (after issuing an RFC). This
-yielded code size reductions and simplifications.
-If you want to construct a minimal chroot() gaol, the following
-command should suffice:
-mount --bind /dev/null /gaol/dev/null
-Repeat for other device nodes you want to expose. Simple!
-----------------------------------------------------------------------------
-Operational issues
-Instructions for the impatient
-Nobody likes reading documentation. People just want to get in there
-and play. So this section tells you quickly the steps you need to take
-to run with devfs mounted over /dev. Skip these steps and you will end
-up with a nearly unbootable system. Subsequent sections describe the
-issues in more detail, and discuss non-essential configuration
-options.
-Devfsd
-OK, if you're reading this, I assume you want to play with
-devfs. First you should ensure that /usr/src/linux contains a
-recent kernel source tree. Then you need to compile devfsd, the device
-management daemon, available at
-http://www.atnf.csiro.au/~rgooch/linux/.
-Because the kernel has a naming scheme
-which is quite different from the old naming scheme, you need to
-install devfsd so that software and configuration files that use the
-old naming scheme will not break.
-Compile and install devfsd. You will be provided with a default
-configuration file /etc/devfsd.conf which will provide
-compatibility symlinks for the old naming scheme. Don't change this
-config file unless you know what you're doing. Even if you think you
-do know what you're doing, don't change it until you've followed all
-the steps below and booted a devfs-enabled system and verified that it
-works.
-Now edit your main system boot script so that devfsd is started at the
-very beginning (before any filesystem
-checks). /etc/rc.d/rc.sysinit is often the main boot script
-on systems with SysV-style boot scripts. On systems with BSD-style
-boot scripts it is often /etc/rc. Also check
-/sbin/rc.
-NOTE that the line you put into the boot
-script should be exactly:
-/sbin/devfsd /dev
-DO NOT use some special daemon-launching
-programme, otherwise the boot script may not wait for devfsd to finish
-initialising.
-System Libraries
-There may still be some problems because of broken software making
-assumptions about device names. In particular, some software does not
-handle devices which are symbolic links. If you are running a libc 5
-based system, install libc 5.4.44 (if you have libc 5.4.46, go back to
-libc 5.4.44, which is actually correct). If you are running a glibc
-based system, make sure you have glibc 2.1.3 or later.
-/etc/securetty
-PAM (Pluggable Authentication Modules) is supposed to be a flexible
-mechanism for providing better user authentication and access to
-services. Unfortunately, it's also fragile, complex and undocumented
-(check out RedHat 6.1, and probably other distributions as well). PAM
-has problems with symbolic links. Append the following lines to your
-/etc/securetty file:
-vc/1
-vc/2
-vc/3
-vc/4
-vc/5
-vc/6
-vc/7
-vc/8
-This will not weaken security. If you have a version of util-linux
-earlier than 2.10.h, please upgrade to 2.10.h or later. If you
-absolutely cannot upgrade, then also append the following lines to
-your /etc/securetty file:
-1
-2
-3
-4
-5
-6
-7
-8
-This may potentially weaken security by allowing root logins over the
-network (a password is still required, though). However, since there
-are problems with dealing with symlinks, I'm suspicious of the level
-of security offered in any case.
-XFree86
-While not essential, it's probably a good idea to upgrade to XFree86
-4.0, as patches went in to make it more devfs-friendly. If you don't,
-you'll probably need to apply the following patch to
-/etc/security/console.perms so that ordinary users can run
-startx. Note that not all distributions have this file (e.g. Debian),
-so if it's not present, don't worry about it.
--- /etc/security/console.perms.orig    Sat Apr 17 16:26:47 1999 
-+++ /etc/security/console.perms Fri Feb 25 23:53:55 2000 
-@@ -14,7 +14,7 @@ 
- # man 5 console.perms 
- # file classes -- these are regular expressions 
-<console>=tty[0-9][0-9]* :[0-9]\.[0-9] :[0-9] 
-+<console>=tty[0-9][0-9]* vc/[0-9][0-9]* :[0-9]\.[0-9] :[0-9] 
- # device classes -- these are shell-style globs 
- <floppy>=/dev/fd[0-1]* 
-If the patch does not apply, then change the line:
-<console>=tty[0-9][0-9]* :[0-9]\.[0-9] :[0-9]
-with:
-<console>=tty[0-9][0-9]* vc/[0-9][0-9]* :[0-9]\.[0-9] :[0-9]
-Disable devpts
-I've had a report of devpts mounted on /dev/pts not working
-correctly. Since devfs will also manage /dev/pts, there is no
-need to mount devpts as well. You should either edit your
-/etc/fstab so devpts is not mounted, or disable devpts from
-your kernel configuration.
-Unsupported drivers
-Not all drivers have devfs support. If you depend on one of these
-drivers, you will need to create a script or tarfile that you can use
-at boot time to create device nodes as appropriate. There is a
-section which describes this. Another
-section lists the drivers which have
-devfs support.
-/dev/mouse
-Many disributions configure /dev/mouse to be the mouse device
-for XFree86 and GPM. I actually think this is a bad idea, because it
-adds another level of indirection. When looking at a config file, if
-you see /dev/mouse you're left wondering which mouse
-is being referred to. Hence I recommend putting the actual mouse
-device (for example /dev/psaux) into your
-/etc/X11/XF86Config file (and similarly for the GPM
-configuration file).
-Alternatively, use the same technique used for unsupported drivers
-described above.
-The Kernel
-Finally, you need to make sure devfs is compiled into your kernel. Set
-CONFIG_EXPERIMENTAL=y, CONFIG_DEVFS_FS=y and CONFIG_DEVFS_MOUNT=y by
-using favourite configuration tool (i.e. make config or
-make xconfig) and then make clean and then recompile your kernel and 
-modules. At boot, devfs will be mounted onto /dev.
-If you encounter problems booting (for example if you forgot a
-configuration step), you can pass devfs=nomount at the kernel
-boot command line. This will prevent the kernel from mounting devfs at
-boot time onto /dev.
-In general, a kernel built with CONFIG_DEVFS_FS=y but without mounting
-devfs onto /dev is completely safe, and requires no
-configuration changes. One exception to take note of is when
-LABEL= directives are used in /etc/fstab. In this
-case you will be unable to boot properly. This is because the
-mount(8) programme uses /proc/partitions as part of
-the volume label search process, and the device names it finds are not
-available, because setting CONFIG_DEVFS_FS=y changes the names in
-/proc/partitions, irrespective of whether devfs is mounted.
-Now you've finished all the steps required. You're now ready to boot
-your shiny new kernel. Enjoy.
-Changing the configuration
-OK, you've now booted a devfs-enabled system, and everything works.
-Now you may feel like changing the configuration (common targets are
-/etc/fstab and /etc/devfsd.conf). Since you have a
-system that works, if you make any changes and it doesn't work, you
-now know that you only have to restore your configuration files to the
-default and it will work again.
-Permissions persistence across reboots
-If you don't use mknod(2) to create a device file, nor use chmod(2) or
-chown(2) to change the ownerships/permissions, the inode ctime will
-remain at 0 (the epoch, 12 am, 1-JAN-1970, GMT). Anything with a ctime
-later than this has had it's ownership/permissions changed. Hence, a
-simple script or programme may be used to tar up all changed inodes,
-prior to shutdown. Although effective, many consider this approach a
-kludge.
-A much better approach is to use devfsd to save and restore
-permissions. It may be configured to record changes in permissions and
-will save them in a database (in fact a directory tree), and restore
-these upon boot. This is an efficient method and results in immediate
-saving of current permissions (unlike the tar approach, which saves
-permissions at some unspecified future time).
-The default configuration file supplied with devfsd has config entries
-which you may uncomment to enable persistence management.
-If you decide to use the tar approach anyway, be aware that tar will
-first unlink(2) an inode before creating a new device node. The
-unlink(2) has the effect of breaking the connection between a devfs
-entry and the device driver. If you use the "devfs=only" boot option,
-you lose access to the device driver, requiring you to reload the
-module. I consider this a bug in tar (there is no real need to
-unlink(2) the inode first).
-Alternatively, you can use devfsd to provide more sophisticated
-management of device permissions. You can use devfsd to store
-permissions for whole groups of devices with a single configuration
-entry, rather than the conventional single entry per device entry.
-Permissions database stored in mounted-over /dev
-If you wish to save and restore your device permissions into the
-disc-based /dev while still mounting devfs onto /dev
-you may do so. This requires a 2.4.x kernel (in fact, 2.3.99 or
-later), which has the VFS binding facility. You need to do the
-following to set this up:
-make sure the kernel does not mount devfs at boot time
-make sure you have a correct /dev/console entry in your
-root file-system (where your disc-based /dev lives)
-create the /dev-state directory
-add the following lines near the very beginning of your boot
-scripts:
-mount --bind /dev /dev-state
-mount -t devfs none /dev
-devfsd /dev
-add the following lines to your /etc/devfsd.conf file:
-REGISTER        ^pt[sy]         IGNORE
-CREATE          ^pt[sy]         IGNORE
-CHANGE          ^pt[sy]         IGNORE
-DELETE          ^pt[sy]         IGNORE
-REGISTER        .*              COPY    /dev-state/$devname $devpath
-CREATE          .*              COPY    $devpath /dev-state/$devname
-CHANGE          .*              COPY    $devpath /dev-state/$devname
-DELETE          .*              CFUNCTION GLOBAL unlink /dev-state/$devname
-RESTORE         /dev-state
-Note that the sample devfsd.conf file contains these lines,
-as well as other sample configurations you may find useful. See the
-devfsd distribution
-reboot.
-Permissions database stored in normal directory
-If you are using an older kernel which doesn't support VFS binding,
-then you won't be able to have the permissions database in a
-mounted-over /dev. However, you can still use a regular
-directory to store the database. The sample /etc/devfsd.conf
-file above may still be used. You will need to create the
-/dev-state directory prior to installing devfsd. If you have
-old permissions in /dev, then just copy (or move) the device
-nodes over to the new directory.
-Which method is better?
-The best method is to have the permissions database stored in the
-mounted-over /dev. This is because you will not need to copy
-device nodes over to /dev-state, and because it allows you to
-switch between devfs and non-devfs kernels, without requiring you to
-copy permissions between /dev-state (for devfs) and
-/dev (for non-devfs).
-Dealing with drivers without devfs support
-Currently, not all device drivers in the kernel have been modified to
-use devfs. Device drivers which do not yet have devfs support will not
-automagically appear in devfs. The simplest way to create device nodes
-for these drivers is to unpack a tarfile containing the required
-device nodes. You can do this in your boot scripts. All your drivers
-will now work as before.
-Hopefully for most people devfs will have enough support so that they
-can mount devfs directly over /dev without losing most functionality
-(i.e. losing access to various devices). As of 22-JAN-1998 (devfs
-patch version 10) I am now running this way. All the devices I have
-are available in devfs, so I don't lose anything.
-WARNING: if your configuration requires the old-style device names
-(i.e. /dev/hda1 or /dev/sda1), you must install devfsd and configure
-it to maintain compatibility entries. It is almost certain that you
-will require this. Note that the kernel creates a compatibility entry
-for the root device, so you don't need initrd.
-Note that you no longer need to mount devpts if you use Unix98 PTYs,
-as devfs can manage /dev/pts itself. This saves you some RAM, as you
-don't need to compile and install devpts. Note that some versions of
-glibc have a bug with Unix98 pty handling on devfs systems. Contact
-the glibc maintainers for a fix. Glibc 2.1.3 has the fix.
-Note also that apart from editing /etc/fstab, other things will need
-to be changed if you *don't* install devfsd. Some software (like the X
-server) hard-wire device names in their source. It really is much
-easier to install devfsd so that compatibility entries are created.
-You can then slowly migrate your system to using the new device names
-(for example, by starting with /etc/fstab), and then limiting the
-compatibility entries that devfsd creates.
-IF YOU CONFIGURE TO MOUNT DEVFS AT BOOT, MAKE SURE YOU INSTALL DEVFSD
-BEFORE YOU BOOT A DEVFS-ENABLED KERNEL!
-Now that devfs has gone into the 2.3.46 kernel, I'm getting a lot of
-reports back. Many of these are because people are trying to run
-without devfsd, and hence some things break. Please just run devfsd if
-things break. I want to concentrate on real bugs rather than
-misconfiguration problems at the moment. If people are willing to fix
-bugs/false assumptions in other code (i.e. glibc, X server) and submit
-that to the respective maintainers, that would be great.
-All the way with Devfs
-The devfs kernel patch creates a rationalised device tree. As stated
-above, if you want to keep using the old /dev naming scheme,
-you just need to configure devfsd appopriately (see the man
-page). People who prefer the old names can ignore this section. For
-those of us who like the rationalised names and an uncluttered
-/dev, read on.
-If you don't run devfsd, or don't enable compatibility entry
-management, then you will have to configure your system to use the new
-names. For example, you will then need to edit your
-/etc/fstab to use the new disc naming scheme. If you want to
-be able to boot non-devfs kernels, you will need compatibility
-symlinks in the underlying disc-based /dev pointing back to
-the old-style names for when you boot a kernel without devfs.
-You can selectively decide which devices you want compatibility
-entries for. For example, you may only want compatibility entries for
-BSD pseudo-terminal devices (otherwise you'll have to patch you C
-library or use Unix98 ptys instead). It's just a matter of putting in
-the correct regular expression into /dev/devfsd.conf.
-There are other choices of naming schemes that you may prefer. For
-example, I don't use the kernel-supplied
-names, because they are too verbose. A common misconception is
-that the kernel-supplied names are meant to be used directly in
-configuration files. This is not the case. They are designed to
-reflect the layout of the devices attached and to provide easy
-classification.
-If you like the kernel-supplied names, that's fine. If you don't then
-you should be using devfsd to construct a namespace more to your
-liking. Devfsd has built-in code to construct a
-namespace that is both logical and easy to
-manage. In essence, it creates a convenient abbreviation of the
-kernel-supplied namespace.
-You are of course free to build your own namespace. Devfsd has all the
-infrastructure required to make this easy for you. All you need do is
-write a script. You can even write some C code and devfsd can load the
-shared object as a callable extension.
-Other Issues
-The init programme
-Another thing to take note of is whether your init programme
-creates a Unix socket /dev/telinit. Some versions of init
-create /dev/telinit so that the telinit programme can
-communicate with the init process. If you have such a system you need
-to make sure that devfs is mounted over /dev *before* init
-starts. In other words, you can't leave the mounting of devfs to
-/etc/rc, since this is executed after init. Other
-versions of init require a named pipe /dev/initctl
-which must exist *before* init starts. Once again, you need to
-mount devfs and then create the named pipe *before* init
-starts.
-The default behaviour now is not to mount devfs onto /dev at
-boot time for 2.3.x and later kernels. You can correct this with the
-"devfs=mount" boot option. This solves any problems with init,
-and also prevents the dreaded:
-Cannot open initial console
-message. For 2.2.x kernels where you need to apply the devfs patch,
-the default is to mount.
-If you have automatic mounting of devfs onto /dev then you
-may need to create /dev/initctl in your boot scripts. The
-following lines should suffice:
-mknod /dev/initctl p
-kill -SIGUSR1 1       # tell init that /dev/initctl now exists
-Alternatively, if you don't want the kernel to mount devfs onto
-/dev then you could use the following procedure is a
-guideline for how to get around /dev/initctl problems:
-# cd /sbin
-# mv init init.real
-# cat > init
-#! /bin/sh
-mount -n -t devfs none /dev
-mknod /dev/initctl p
-exec /sbin/init.real $*
-[control-D]
-# chmod a+x init
-Note that newer versions of init create /dev/initctl
-automatically, so you don't have to worry about this.
-Module autoloading
-You will need to configure devfsd to enable module
-autoloading. The following lines should be placed in your
-/etc/devfsd.conf file:
-LOOKUP  .*              MODLOAD
-As of devfsd-v1.3.10, a generic /etc/modules.devfs
-configuration file is installed, which is used by the MODLOAD
-action. This should be sufficient for most configurations. If you
-require further configuration, edit your /etc/modules.conf
-file. The way module autoloading work with devfs is:
-a process attempts to lookup a device node (e.g. /dev/fred)
-if that device node does not exist, the full pathname is passed to
-devfsd as a string
-devfsd will pass the string to the modprobe programme (provided the
-configuration line shown above is present), and specifies that
-/etc/modules.devfs is the configuration file
-/etc/modules.devfs includes /etc/modules.conf to
-access local configurations
-modprobe will search it's configuration files, looking for an alias
-that translates the pathname into a module name
-the translated pathname is then used to load the module.
-If you wanted a lookup of /dev/fred to load the
-mymod module, you would require the following configuration
-line in /etc/modules.conf:
-alias    /dev/fred    mymod
-The /etc/modules.devfs configuration file provides many such
-aliases for standard device names. If you look closely at this file,
-you will note that some modules require multiple alias configuration
-lines. This is required to support module autoloading for old and new
-device names.
-Mounting root off a devfs device
-If you wish to mount root off a devfs device when you pass the
-"devfs=only" boot option, then you need to pass in the
-"root=<device>" option to the kernel when booting. If you use
-LILO, then you must have this in lilo.conf:
-append = "root=<device>"
-Surprised? Yep, so was I. It turns out if you have (as most people
-do):
-root = <device>
-then LILO will determine the device number of <device> and will
-write that device number into a special place in the kernel image
-before starting the kernel, and the kernel will use that device number
-to mount the root filesystem. So, using the "append" variety ensures
-that LILO passes the root filesystem device as a string, which devfs
-can then use.
-Note that this isn't an issue if you don't pass "devfs=only".
-TTY issues
-The ttyname(3) function in some versions of the C library makes
-false assumptions about device entries which are symbolic links.  The
-tty(1) programme is one that depends on this function.  I've
-written a patch to libc 5.4.43 which fixes this. This has been
-included in libc 5.4.44 and a similar fix is in glibc 2.1.3.
-Kernel Naming Scheme
-The kernel provides a default naming scheme. This scheme is designed
-to make it easy to search for specific devices or device types, and to
-view the available devices. Some device types (such as hard discs),
-have a directory of entries, making it easy to see what devices of
-that class are available. Often, the entries are symbolic links into a
-directory tree that reflects the topology of available devices. The
-topological tree is useful for finding how your devices are arranged.
-Below is a list of the naming schemes for the most common drivers. A
-list of reserved device names is
-available for reference. Please send email to
-rgooch@atnf.csiro.au to obtain an allocation. Please be
-patient (the maintainer is busy). An alternative name may be allocated
-instead of the requested name, at the discretion of the maintainer.
-Disc Devices
-All discs, whether SCSI, IDE or whatever, are placed under the
-/dev/discs hierarchy:
-        /dev/discs/disc0        first disc
-        /dev/discs/disc1        second disc
-Each of these entries is a symbolic link to the directory for that
-device. The device directory contains:
-        disc    for the whole disc
-        part*   for individual partitions
-CD-ROM Devices
-All CD-ROMs, whether SCSI, IDE or whatever, are placed under the
-/dev/cdroms hierarchy:
-        /dev/cdroms/cdrom0      first CD-ROM
-        /dev/cdroms/cdrom1      second CD-ROM
-Each of these entries is a symbolic link to the real device entry for
-that device.
-Tape Devices
-All tapes, whether SCSI, IDE or whatever, are placed under the
-/dev/tapes hierarchy:
-        /dev/tapes/tape0        first tape
-        /dev/tapes/tape1        second tape
-Each of these entries is a symbolic link to the directory for that
-device. The device directory contains:
-        mt                      for mode 0
-        mtl                     for mode 1
-        mtm                     for mode 2
-        mta                     for mode 3
-        mtn                     for mode 0, no rewind
-        mtln                    for mode 1, no rewind
-        mtmn                    for mode 2, no rewind
-        mtan                    for mode 3, no rewind
-SCSI Devices
-To uniquely identify any SCSI device requires the following
-information:
-  controller    (host adapter)
-  bus           (SCSI channel)
-  target        (SCSI ID)
-  unit          (Logical Unit Number)
-All SCSI devices are placed under /dev/scsi (assuming devfs
-is mounted on /dev). Hence, a SCSI device with the following
-parameters: c=1,b=2,t=3,u=4 would appear as:
-        /dev/scsi/host1/bus2/target3/lun4       device directory
-Inside this directory, a number of device entries may be created,
-depending on which SCSI device-type drivers were installed.
-See the section on the disc naming scheme to see what entries the SCSI
-disc driver creates.
-See the section on the tape naming scheme to see what entries the SCSI
-tape driver creates.
-The SCSI CD-ROM driver creates:
-        cd
-The SCSI generic driver creates:
-        generic
-IDE Devices
-To uniquely identify any IDE device requires the following
-information:
-  controller
-  bus           (aka. primary/secondary)
-  target        (aka. master/slave)
-  unit
-All IDE devices are placed under /dev/ide, and uses a similar
-naming scheme to the SCSI subsystem.
-XT Hard Discs
-All XT discs are placed under /dev/xd. The first XT disc has
-the directory /dev/xd/disc0.
-TTY devices
-The tty devices now appear as:
-  New name                   Old-name                   Device Type
-  --------                   --------                   -----------
-  /dev/tts/{0,1,...}         /dev/ttyS{0,1,...}         Serial ports
-  /dev/cua/{0,1,...}         /dev/cua{0,1,...}          Call out devices
-  /dev/vc/0                  /dev/tty                   Current virtual console
-  /dev/vc/{1,2,...}          /dev/tty{1...63}           Virtual consoles
-  /dev/vcc/{0,1,...}         /dev/vcs{1...63}           Virtual consoles
-  /dev/pty/m{0,1,...}        /dev/ptyp??                PTY masters
-  /dev/pty/s{0,1,...}        /dev/ttyp??                PTY slaves
-RAMDISCS
-The RAMDISCS are placed in their own directory, and are named thus:
-  /dev/rd/{0,1,2,...}
-Meta Devices
-The meta devices are placed in their own directory, and are named
-thus:
-  /dev/md/{0,1,2,...}
-Floppy discs
-Floppy discs are placed in the /dev/floppy directory.
-Loop devices
-Loop devices are placed in the /dev/loop directory.
-Sound devices
-Sound devices are placed in the /dev/sound directory
-(audio, sequencer, ...).
-Devfsd Naming Scheme
-Devfsd provides a naming scheme which is a convenient abbreviation of
-the kernel-supplied namespace. In some
-cases, the kernel-supplied naming scheme is quite convenient, so
-devfsd does not provide another naming scheme. The convenience names
-that devfsd creates are in fact the same names as the original devfs
-kernel patch created (before Linus mandated the Big Name
-Change). These are referred to as "new compatibility entries".
-In order to configure devfsd to create these convenience names, the
-following lines should be placed in your /etc/devfsd.conf:
-REGISTER        .*              MKNEWCOMPAT
-UNREGISTER      .*              RMNEWCOMPAT
-This will cause devfsd to create (and destroy) symbolic links which
-point to the kernel-supplied names.
-SCSI Hard Discs
-All SCSI discs are placed under /dev/sd (assuming devfs is
-mounted on /dev). Hence, a SCSI disc with the following
-parameters: c=1,b=2,t=3,u=4 would appear as:
-        /dev/sd/c1b2t3u4        for the whole disc
-        /dev/sd/c1b2t3u4p5      for the 5th partition
-        /dev/sd/c1b2t3u4p5s6    for the 6th slice in the 5th partition
-SCSI Tapes
-All SCSI tapes are placed under /dev/st. A similar naming
-scheme is used as for SCSI discs. A SCSI tape with the
-parameters:c=1,b=2,t=3,u=4 would appear as:
-        /dev/st/c1b2t3u4m0      for mode 0
-        /dev/st/c1b2t3u4m1      for mode 1
-        /dev/st/c1b2t3u4m2      for mode 2
-        /dev/st/c1b2t3u4m3      for mode 3
-        /dev/st/c1b2t3u4m0n     for mode 0, no rewind
-        /dev/st/c1b2t3u4m1n     for mode 1, no rewind
-        /dev/st/c1b2t3u4m2n     for mode 2, no rewind
-        /dev/st/c1b2t3u4m3n     for mode 3, no rewind
-SCSI CD-ROMs
-All SCSI CD-ROMs are placed under /dev/sr. A similar naming
-scheme is used as for SCSI discs. A SCSI CD-ROM with the
-parameters:c=1,b=2,t=3,u=4 would appear as:
-        /dev/sr/c1b2t3u4
-SCSI Generic Devices
-The generic (aka. raw) interface for all SCSI devices are placed under
-/dev/sg. A similar naming scheme is used as for SCSI discs. A
-SCSI generic device with the parameters:c=1,b=2,t=3,u=4 would appear
-as:
-        /dev/sg/c1b2t3u4
-IDE Hard Discs
-All IDE discs are placed under /dev/ide/hd, using a similar
-convention to SCSI discs. The following mappings exist between the new
-and the old names:
-        /dev/hda        /dev/ide/hd/c0b0t0u0
-        /dev/hdb        /dev/ide/hd/c0b0t1u0
-        /dev/hdc        /dev/ide/hd/c0b1t0u0
-        /dev/hdd        /dev/ide/hd/c0b1t1u0
-IDE Tapes
-A similar naming scheme is used as for IDE discs. The entries will
-appear in the /dev/ide/mt directory.
-IDE CD-ROM
-A similar naming scheme is used as for IDE discs. The entries will
-appear in the /dev/ide/cd directory.
-IDE Floppies
-A similar naming scheme is used as for IDE discs. The entries will
-appear in the /dev/ide/fd directory.
-XT Hard Discs
-All XT discs are placed under /dev/xd. The first XT disc
-would appear as /dev/xd/c0t0.
-Old Compatibility Names
-The old compatibility names are the legacy device names, such as
-/dev/hda, /dev/sda, /dev/rtc and so on.
-Devfsd can be configured to create compatibility symlinks so that you
-may continue to use the old names in your configuration files and so
-that old applications will continue to function correctly.
-In order to configure devfsd to create these legacy names, the
-following lines should be placed in your /etc/devfsd.conf:
-REGISTER        .*              MKOLDCOMPAT
-UNREGISTER      .*              RMOLDCOMPAT
-This will cause devfsd to create (and destroy) symbolic links which
-point to the kernel-supplied names.
-----------------------------------------------------------------------------
-Device drivers currently ported
- All miscellaneous character devices support devfs (this is done
-  transparently through misc_register())
- SCSI discs and generic hard discs
- Character memory devices (null, zero, full and so on)
-  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
- Loop devices (/dev/loop?)
- 
- TTY devices (console, serial ports, terminals and pseudo-terminals)
-  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
- SCSI tapes (/dev/scsi and /dev/tapes)
- SCSI CD-ROMs (/dev/scsi and /dev/cdroms)
- SCSI generic devices (/dev/scsi)
- RAMDISCS (/dev/ram?)
- Meta Devices (/dev/md*)
- Floppy discs (/dev/floppy)
- Parallel port printers (/dev/printers)
- Sound devices (/dev/sound)
-  Thanks to Eric Dumas <dumas@linux.eu.org> and
-  C. Scott Ananian <cananian@alumni.princeton.edu>
- Joysticks (/dev/joysticks)
- Sparc keyboard (/dev/kbd)
- DSP56001 digital signal processor (/dev/dsp56k)
- Apple Desktop Bus (/dev/adb)
- Coda network file system (/dev/cfs*)
- Virtual console capture devices (/dev/vcc)
-  Thanks to Dennis Hou <smilax@mindmeld.yi.org>
- Frame buffer devices (/dev/fb)
- Video capture devices (/dev/v4l)
-----------------------------------------------------------------------------
-Allocation of Device Numbers
-Devfs allows you to write a driver which doesn't need to allocate a
-device number (major&minor numbers) for the internal operation of the
-kernel. However, there are a number of userspace programmes that use
-the device number as a unique handle for a device. An example is the
-find programme, which uses device numbers to determine whether
-an inode is on a different filesystem than another inode. The device
-number used is the one for the block device which a filesystem is
-using. To preserve compatibility with userspace programmes, block
-devices using devfs need to have unique device numbers allocated to
-them. Furthermore, POSIX specifies device numbers, so some kind of
-device number needs to be presented to userspace.
-The simplest option (especially when porting drivers to devfs) is to
-keep using the old major and minor numbers. Devfs will take whatever
-values are given for major&minor and pass them onto userspace.
-This device number is a 16 bit number, so this leaves plenty of space
-for large numbers of discs and partitions. This scheme can also be
-used for character devices, in particular the tty devices, which are
-currently limited to 256 pseudo-ttys (this limits the total number of
-simultaneous xterms and remote logins).  Note that the device number
-is limited to the range 36864-61439 (majors 144-239), in order to
-avoid any possible conflicts with existing official allocations.
-Please note that using dynamically allocated block device numbers may
-break the NFS daemons (both user and kernel mode), which expect dev_t
-for a given device to be constant over the lifetime of remote mounts.
-A final note on this scheme: since it doesn't increase the size of
-device numbers, there are no compatibility issues with userspace.
-----------------------------------------------------------------------------
-Questions and Answers
-Making things work
-Alternatives to devfs
-What I don't like about devfs
-How to report bugs
-Strange kernel messages
-Compilation problems with devfsd
-Making things work
-Here are some common questions and answers.
-Devfsd doesn't start
-Make sure you have compiled and installed devfsd
-Make sure devfsd is being started from your boot
-scripts
-Make sure you have configured your kernel to enable devfs (see
-below)
-Make sure devfs is mounted (see below)
-Devfsd is not managing all my permissions
-Make sure you are capturing the appropriate events. For example,
-device entries created by the kernel generate REGISTER events,
-but those created by devfsd generate CREATE events.
-Devfsd is not capturing all REGISTER events
-See the previous entry: you may need to capture CREATE events.
-X will not start
-Make sure you followed the steps 
-outlined above.
-Why don't my network devices appear in devfs?
-This is not a bug. Network devices have their own, completely separate
-namespace. They are accessed via socket(2) and
-setsockopt(2) calls, and thus require no device nodes. I have
-raised the possibilty of moving network devices into the device
-namespace, but have had no response.
-How can I test if I have devfs compiled into my kernel?
-All filesystems built-in or currently loaded are listed in
-/proc/filesystems. If you see a devfs entry, then
-you know that devfs was compiled into your kernel. If you have
-correctly configured and rebuilt your kernel, then devfs will be
-built-in. If you think you've configured it in, but
-/proc/filesystems doesn't show it, you've made a mistake.
-Common mistakes include:
-Using a 2.2.x kernel without applying the devfs patch (if you
-don't know how to patch your kernel, use 2.4.x instead, don't bother
-asking me how to patch)
-Forgetting to set CONFIG_EXPERIMENTAL=y
-Forgetting to set CONFIG_DEVFS_FS=y
-Forgetting to set CONFIG_DEVFS_MOUNT=y (if you want devfs
-to be automatically mounted at boot)
-Editing your .config manually, instead of using make
-config or make xconfig
-Forgetting to run make dep; make clean after changing the
-configuration and before compiling
-Forgetting to compile your kernel and modules
-Forgetting to install your kernel
-Forgetting to install your modules
-Please check twice that you've done all these steps before sending in
-a bug report.
-How can I test if devfs is mounted on /dev?
-The device filesystem will always create an entry called
-".devfsd", which is used to communicate with the daemon. Even
-if the daemon is not running, this entry will exist. Testing for the
-existence of this entry is the approved method of determining if devfs
-is mounted or not. Note that the type of entry (i.e. regular file,
-character device, named pipe, etc.) may change without notice. Only
-the existence of the entry should be relied upon.
-When I start devfsd, I see the error:
-Error opening file: ".devfsd"   No such file or directory?
-This means that devfs is not mounted. Make sure you have devfs mounted.
-How do I mount devfs?
-First make sure you have devfs compiled into your kernel (see
-above). Then you will either need to:
-set CONFIG_DEVFS_MOUNT=y in your kernel config
-pass devfs=mount to your boot loader
-mount devfs manually in your boot scripts with:
-mount -t none devfs /dev
-Mount by volume LABEL=<label> doesn't work with
-devfs
-Most probably you are not mounting devfs onto /dev. What
-happens is that if your kernel config has CONFIG_DEVFS_FS=y
-then the contents of /proc/partitions will have the devfs
-names (such as scsi/host0/bus0/target0/lun0/part1). The
-contents of /proc/partitions are used by mount(8) when
-mounting by volume label. If devfs is not mounted on /dev,
-then mount(8) will fail to find devices. The solution is to
-make sure that devfs is mounted on /dev. See above for how to
-do that.
-I have extra or incorrect entries in /dev
-You may have stale entries in your dev-state area. Check for a
-RESTORE configuration line in your devfsd configuration
-(typically /etc/devfsd.conf). If you have this line, check
-the contents of the specified directory for stale entries. Remove
-any entries which are incorrect, then reboot.
-I get "Unable to open initial console" messages at boot
-This usually happens when you don't have devfs automounted onto
-/dev at boot time, and there is no valid
-/dev/console entry on your root file-system. Create a valid
-/dev/console device node.
-Alternatives to devfs
-I've attempted to collate all the anti-devfs proposals and explain
-their limitations. Under construction.
-Why not just pass device create/remove events to a daemon?
-Here the suggestion is to develop an API in the kernel so that devices
-can register create and remove events, and a daemon listens for those
-events. The daemon would then populate/depopulate /dev (which
-resides on disc).
-This has several limitations:
-it only works for modules loaded and unloaded (or devices inserted
-and removed) after the kernel has finished booting. Without a database
-of events, there is no way the daemon could fully populate
-/dev
-if you add a database to this scheme, the question is then how to
-present that database to user-space. If you make it a list of strings
-with embedded event codes which are passed through a pipe to the
-daemon, then this is only of use to the daemon. I would argue that the
-natural way to present this data is via a filesystem (since many of
-the events will be of a hierarchical nature), such as devfs.
-Presenting the data as a filesystem makes it easy for the user to see
-what is available and also makes it easy to write scripts to scan the
-"database"
-the tight binding between device nodes and drivers is no longer
-possible (requiring the otherwise perfectly avoidable
-table lookups)
-you cannot catch inode lookup events on /dev which means
-that module autoloading requires device nodes to be created. This is a
-problem, particularly for drivers where only a few inodes are created
-from a potentially large set
-this technique can't be used when the root FS is mounted
-read-only
-Just implement a better scsidev
-This suggestion involves taking the scsidev programme and
-extending it to scan for all devices, not just SCSI devices. The
-scsidev programme works by scanning /proc/scsi
-Problems:
-the kernel does not currently provide a list of all devices
-available. Not all drivers register entries in /proc or
-generate kernel messages
-there is no uniform mechanism to register devices other than the
-devfs API
-implementing such an API is then the same as the
-proposal above
-Put /dev on a ramdisc
-This suggestion involves creating a ramdisc and populating it with
-device nodes and then mounting it over /dev.
-Problems:
-this doesn't help when mounting the root filesystem, since you
-still need a device node to do that
-if you want to use this technique for the root device node as
-well, you need to use initrd. This complicates the booting sequence
-and makes it significantly harder to administer and configure. The
-initrd is essentially opaque, robbing the system administrator of easy
-configuration
-insufficient information is available to correctly populate the
-ramdisc. So we come back to the
-proposal above to "solve" this
-a ramdisc-based solution would take more kernel memory, since the
-backing store would be (at best) normal VFS inodes and dentries, which
-take 284 bytes and 112 bytes, respectively, for each entry. Compare
-that to 72 bytes for devfs
-Do nothing: there's no problem
-Sometimes people can be heard to claim that the existing scheme is
-fine. This is what they're ignoring:
-device number size (8 bits each for major and minor) is a real
-limitation, and must be fixed somehow. Systems with large numbers of
-SCSI devices, for example, will continue to consume the remaining
-unallocated major numbers. USB will also need to push beyond the 8 bit
-minor limitation
-simply increasing the device number size is insufficient. Apart
-from causing a lot of pain, it doesn't solve the management issues
-of a /dev with thousands or more device nodes
-ignoring the problem of a huge /dev will not make it go
-away, and dismisses the legitimacy of a large number of people who
-want a dynamic /dev
-the standard response then becomes: "write a device management
-daemon", which brings us back to the
-proposal above
-What I don't like about devfs
-Here are some common complaints about devfs, and some suggestions and
-solutions that may make it more palatable for you. I can't please
-everybody, but I do try :-)
-I hate the naming scheme
-First, remember that no naming scheme will please everybody. You hate
-the scheme, others love it. Who's to say who's right and who's wrong?
-Ultimately, the person who writes the code gets to choose, and what
-exists now is a combination of the choices made by the
-devfs author and the
-kernel maintainer (Linus).
-However, not all is lost. If you want to create your own naming
-scheme, it is a simple matter to write a standalone script, hack
-devfsd, or write a script called by devfsd. You can create whatever
-naming scheme you like.
-Further, if you want to remove all traces of the devfs naming scheme
-from /dev, you can mount devfs elsewhere (say
-/devfs) and populate /dev with links into
-/devfs. This population can be automated using devfsd if you
-wish.
-You can even use the VFS binding facility to make the links, rather
-than using symbolic links. This way, you don't even have to see the
-"destination" of these symbolic links.
-Devfs puts policy into the kernel
-There's already policy in the kernel. Device numbers are in fact
-policy (why should the kernel dictate what device numbers I use?).
-Face it, some policy has to be in the kernel. The real difference
-between device names as policy and device numbers as policy is that
-no one will use device numbers directly, because device
-numbers are devoid of meaning to humans and are ugly. At least with
-the devfs device names, (even though you can add your own naming
-scheme) some people will use the devfs-supplied names directly. This
-offends some people :-)
-Devfs is bloatware
-This is not even remotely true. As shown above,
-both code and data size are quite modest.
-How to report bugs
-If you have (or think you have) a bug with devfs, please follow the
-steps below:
-make sure you have enabled debugging output when configuring your
-kernel. You will need to set (at least) the following config options:
-CONFIG_DEVFS_DEBUG=y
-CONFIG_DEBUG_KERNEL=y
-CONFIG_DEBUG_SLAB=y
-please make sure you have the latest devfs patches applied. The
-latest kernel version might not have the latest devfs patches applied
-yet (Linus is very busy)
-save a copy of your complete kernel logs (preferably by
-using the dmesg programme) for later inclusion in your bug
-report. You may need to use the -s switch to increase the
-internal buffer size so you can capture all the boot messages.
-Don't edit or trim the dmesg output
-try booting with devfs=dall passed to the kernel boot
-command line (read the documentation on your bootloader on how to do
-this), and save the result to a file. This may be quite verbose, and
-it may overflow the messages buffer, but try to get as much of it as
-you can
-send a copy of your devfsd configuration file(s)
-send the bug report to me first.
-Don't expect that I will see it if you post it to the linux-kernel
-mailing list. Include all the information listed above, plus
-anything else that you think might be relevant. Put the string
-devfs somewhere in the subject line, so my mail filters mark
-it as urgent
-Here is a general guide on how to ask questions in a way that greatly
-improves your chances of getting a reply:
-http://www.tuxedo.org/~esr/faqs/smart-questions.html. If you have
-a bug to report, you should also read
-http://www.chiark.greenend.org.uk/~sgtatham/bugs.html.
-Strange kernel messages
-You may see devfs-related messages in your kernel logs. Below are some
-messages and what they mean (and what you should do about them, if
-anything).
-devfs_register(fred): could not append to parent, err: -17
-You need to check what the error code means, but usually 17 means
-EEXIST. This means that a driver attempted to create an entry
-fred in a directory, but there already was an entry with that
-name. This is often caused by flawed boot scripts which untar a bunch
-of inodes into /dev, as a way to restore permissions. This
-message is harmless, as the device nodes will still
-provide access to the driver (unless you use the devfs=only
-boot option, which is only for dedicated souls:-). If you want to get
-rid of these annoying messages, upgrade to devfsd-v1.3.20 and use the
-recommended RESTORE directive to restore permissions.
-devfs_mk_dir(bill): using old entry in dir: c1808724 ""
-This is similar to the message above, except that a driver attempted
-to create a directory named bill, and the parent directory
-has an entry with the same name. In this case, to ensure that drivers
-continue to work properly, the old entry is re-used and given to the
-driver. In 2.5 kernels, the driver is given a NULL entry, and thus,
-under rare circumstances, may not create the require device nodes.
-The solution is the same as above.
-Compilation problems with devfsd
-Usually, you can compile devfsd just by typing in
-make in the source directory, followed by a make
-install (as root). Sometimes, you may have problems, particularly
-on broken configurations.
-error messages relating to DEVFSD_NOTIFY_DELETE
-This happened because you have an ancient set of kernel headers
-installed in /usr/include/linux or /usr/src/linux.
-Install kernel 2.4.10 or later. You may need to pass the
-KERNEL_DIR variable to make (if you did not install
-the new kernel sources as /usr/src/linux), or you may copy
-the devfs_fs.h file in the kernel source tree into
-/usr/include/linux.
-----------------------------------------------------------------------------
-Other resources
-Douglas Gilbert has written a useful document at
-http://www.torque.net/sg/devfs_scsi.html which
-explores the SCSI subsystem and how it interacts with devfs
-Douglas Gilbert has written another useful document at
-http://www.torque.net/scsi/SCSI-2.4-HOWTO/ which
-discusses the Linux SCSI subsystem in 2.4.
-Johannes Erdfelt has started a discussion paper on Linux and
-hot-swap devices, describing what the requirements are for a scalable
-solution and how and why he's used devfs+devfsd. Note that this is an
-early draft only, available in plain text form at:
-http://johannes.erdfelt.com/hotswap.txt.
-Johannes has promised a HTML version will follow.
-I presented an invited 
-paper
-at the
-2nd Annual Storage Management Workshop held in Miamia, Florida,
-U.S.A. in October 2000.
-----------------------------------------------------------------------------
-Translations of this document
-This document has been translated into other languages.
-The document master (in English) by rgooch@atnf.csiro.au is
-available at
-http://www.atnf.csiro.au/~rgooch/linux/docs/devfs.html
-A Korean translation by viatoris@nownuri.net is available at
-http://your.destiny.pe.kr/devfs/devfs.html
-----------------------------------------------------------------------------
-Most flags courtesy of ITA's 
-Flags of All Countries
-used with permission. 
diff --git a/Documentation/filesystems/devfs/ToDo b/Documentation/filesystems/devfs/ToDo
deleted file mode 100644
index afd5a8f2c19b..000000000000
--- a/Documentation/filesystems/devfs/ToDo
+++ /dev/null
@@ -1,40 +0,0 @@
-                Device File System (devfs) ToDo List
-                Richard Gooch <rgooch@atnf.csiro.au>
-                              3-JUL-2000
-This is a list of things to be done for better devfs support in the
-Linux kernel. If you'd like to contribute to the devfs, please have a
-look at this list for anything that is unallocated. Also, if there are
-items missing (surely), please contact me so I can add them to the
-list (preferably with your name attached to them:-).
- >256 ptys
-  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
- Amiga floppy driver (drivers/block/amiflop.c)
- Atari floppy driver (drivers/block/ataflop.c)
- SWIM3 (Super Woz Integrated Machine 3) floppy driver (drivers/block/swim3.c)
- Amiga ZorroII ramdisc driver (drivers/block/z2ram.c)
- Parallel port ATAPI CD-ROM (drivers/block/paride/pcd.c)
- Parallel port ATAPI floppy (drivers/block/paride/pf.c)
- AP1000 block driver (drivers/ap1000/ap.c, drivers/ap1000/ddv.c)
- Archimedes floppy (drivers/acorn/block/fd1772.c)
- MFM hard drive (drivers/acorn/block/mfmhd.c)
- I2O block device (drivers/message/i2o/i2o_block.c)
- ST-RAM device (arch/m68k/atari/stram.c)
- Raw devices
diff --git a/Documentation/filesystems/devfs/boot-options b/Documentation/filesystems/devfs/boot-options
deleted file mode 100644
index df3d33b03e0a..000000000000
--- a/Documentation/filesystems/devfs/boot-options
+++ /dev/null
@@ -1,65 +0,0 @@
-/* -*- auto-fill -*-                                                         */
-                Device File System (devfs) Boot Options
-                Richard Gooch <rgooch@atnf.csiro.au>
-                              18-AUG-2001
-When CONFIG_DEVFS_DEBUG is enabled, you can pass several boot options
-to the kernel to debug devfs. The boot options are prefixed by
-"devfs=", and are separated by commas. Spaces are not allowed. The
-syntax looks like this:
-devfs=<option1>,<option2>,<option3>
-and so on. For example, if you wanted to turn on debugging for module
-load requests and device registration, you would do:
-devfs=dmod,dreg
-You may prefix "no" to any option. This will invert the option.
-Debugging Options
-=================
-These requires CONFIG_DEVFS_DEBUG to be enabled.
-Note that all debugging options have 'd' as the first character. By
-default all options are off. All debugging output is sent to the
-kernel logs. The debugging options do not take effect until the devfs
-version message appears (just prior to the root filesystem being
-mounted).
-These are the options:
-dmod            print module load requests to <request_module>
-dreg            print device register requests to <devfs_register>
-dunreg          print device unregister requests to <devfs_unregister>
-dchange         print device change requests to <devfs_set_flags>
-dilookup        print inode lookup requests
-diget           print VFS inode allocations
-diunlink        print inode unlinks
-dichange        print inode changes
-dimknod         print calls to mknod(2)
-dall            some debugging turned on
-Other Options
-=============
-These control the default behaviour of devfs. The options are:
-mount           mount devfs onto /dev at boot time
-only            disable non-devfs device nodes for devfs-capable drivers
diff --git a/Documentation/initrd.txt b/Documentation/initrd.txt
index 7de1c80cd719..b1b6440237a6 100644
--- a/Documentation/initrd.txt
+++ b/Documentation/initrd.txt
@@ -67,8 +67,7 @@ initrd adds the following new options:
    as the last process has closed it, all data is freed and /dev/initrd
    can't be opened anymore.
-  root=/dev/ram0   (without devfs)
+  root=/dev/ram0
-  root=/dev/rd/0   (with devfs)
    initrd is mounted as root, and the normal boot procedure is followed,
    with the RAM disk still mounted as root.
@@ -90,8 +89,7 @@ you're building an install floppy), the root file system creation
 procedure should create the /initrd directory.
 If initrd will not be mounted in some cases, its content is still
-accessible if the following device has been created (note that this
+accessible if the following device has been created:
-does not work if using devfs):
 # mknod /dev/initrd b 1 250 
 # chmod 400 /dev/initrd
@@ -119,8 +117,7 @@ We'll describe the loopback device method:
    (if space is critical, you may want to use the Minix FS instead of Ext2)
 3) mount the file system, e.g.
    # mount -t ext2 -o loop initrd /mnt
- 4) create the console device (not necessary if using devfs, but it can't
+ 4) create the console device:
-    hurt to do it anyway):
    # mkdir /mnt/dev
    # mknod /mnt/dev/console c 5 1
 5) copy all the files that are needed to properly use the initrd
@@ -152,12 +149,7 @@ have to be given:
  root=/dev/ram0 init=/linuxrc rw
-if not using devfs, or
+(rw is only necessary if writing to the initrd file system.)
-  root=/dev/rd/0 init=/linuxrc rw
-if using devfs. (rw is only necessary if writing to the initrd file
-system.)
 With LOADLIN, you simply execute
@@ -217,9 +209,9 @@ following command:
 # exec chroot . what-follows <dev/console >dev/console 2>&1
 Where what-follows is a program under the new root, e.g. /sbin/init
-If the new root file system will be used with devfs and has no valid
+If the new root file system will be used with udev and has no valid
-/dev directory, devfs must be mounted before invoking chroot in order to
+/dev directory, udev must be initialized before invoking chroot in order
-provide /dev/console.
+to provide /dev/console.
 Note: implementation details of pivot_root may change with time. In order
 to ensure compatibility, the following points should be observed:
@@ -236,7 +228,7 @@ Now, the initrd can be unmounted and the memory allocated by the RAM
 disk can be freed:
 # umount /initrd
-# blockdev --flushbufs /dev/ram0    # /dev/rd/0 if using devfs
+# blockdev --flushbufs /dev/ram0
 It is also possible to use initrd with an NFS-mounted root, see the
 pivot_root(8) man page for details.
diff --git a/Documentation/ioctl-number.txt b/Documentation/ioctl-number.txt
index 1543802ef53e..edc04d74ae23 100644
--- a/Documentation/ioctl-number.txt
+++ b/Documentation/ioctl-number.txt
@@ -119,7 +119,6 @@ Code	Seq#	Include File		Comments
 'c'     00-7F   linux/comstats.h        conflict!
 'c'     00-7F   linux/coda.h            conflict!
 'd'     00-FF   linux/char/drm/drm/h    conflict!
-'d'     00-1F   linux/devfs_fs.h        conflict!
 'd'     00-DF   linux/video_decoder.h   conflict!
 'd'     F0-FF   linux/digi1.h
 'e'     all     linux/digi1.h           conflict!
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 25f8d20dac53..86e9282d1c20 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -35,7 +35,6 @@ parameter is applicable:
        APM     Advanced Power Management support is enabled.
        AX25    Appropriate AX.25 support is enabled.
        CD      Appropriate CD support is enabled.
-        DEVFS   devfs support is enabled.
        DRM     Direct Rendering Management support is enabled.
        EDD     BIOS Enhanced Disk Drive Services (EDD) is enabled
        EFI     EFI Partitioning (GPT) is enabled
@@ -440,9 +439,6 @@ running once the system is up.
                        Format: <area>[,<node>]
                        See also Documentation/networking/decnet.txt.
-        devfs=          [DEVFS]
-                        See Documentation/filesystems/devfs/boot-options.
        dhash_entries=  [KNL]
                        Set number of hash buckets for dentry cache.
diff --git a/arch/cris/arch-v10/kernel/debugport.c b/arch/cris/arch-v10/kernel/debugport.c
index f3a85b77c17e..dde813e16294 100644
--- a/arch/cris/arch-v10/kernel/debugport.c
+++ b/arch/cris/arch-v10/kernel/debugport.c
@@ -541,7 +541,7 @@ init_dummy_console(void)
        dummy_driver.init_termios = tty_std_termios;
        dummy_driver.init_termios.c_cflag =
                B115200 | CS8 | CREAD | HUPCL | CLOCAL; /* is normally B9600 default... */
-        dummy_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
+        dummy_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
        dummy_driver.open = dummy_open;
        dummy_driver.close = dummy_close;
diff --git a/arch/cris/arch-v32/kernel/debugport.c b/arch/cris/arch-v32/kernel/debugport.c
index ffc1ebf2dfee..3dc587e6201a 100644
--- a/arch/cris/arch-v32/kernel/debugport.c
+++ b/arch/cris/arch-v32/kernel/debugport.c
@@ -353,7 +353,7 @@ init_dummy_console(void)
        dummy_driver.init_termios = tty_std_termios;
        dummy_driver.init_termios.c_cflag =
                B115200 | CS8 | CREAD | HUPCL | CLOCAL; /* is normally B9600 default... */
-        dummy_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
+        dummy_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
        dummy_driver.open = dummy_open;
        dummy_driver.close = dummy_close;
diff --git a/arch/i386/kernel/microcode.c b/arch/i386/kernel/microcode.c
index 0a865889b2a9..40b44cc0d14b 100644
--- a/arch/i386/kernel/microcode.c
+++ b/arch/i386/kernel/microcode.c
@@ -493,7 +493,6 @@ static struct file_operations microcode_fops = {
 static struct miscdevice microcode_dev = {
        .minor          = MICROCODE_MINOR,
        .name           = "microcode",
-        .devfs_name     = "cpu/microcode",
        .fops           = &microcode_fops,
 };
diff --git a/arch/ppc/4xx_io/serial_sicc.c b/arch/ppc/4xx_io/serial_sicc.c
index 98b25fa0049a..1e113d0f59b8 100644
--- a/arch/ppc/4xx_io/serial_sicc.c
+++ b/arch/ppc/4xx_io/serial_sicc.c
@@ -1758,7 +1758,7 @@ int __init siccuart_init(void)
    siccnormal_driver->subtype = SERIAL_TYPE_NORMAL;
    siccnormal_driver->init_termios = tty_std_termios;
    siccnormal_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
-    siccnormal_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
+    siccnormal_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
    tty_set_operations(siccnormal_driver, &sicc_ops);
    if (tty_register_driver(siccnormal_driver))
diff --git a/arch/sh/kernel/cpu/sh4/sq.c b/arch/sh/kernel/cpu/sh4/sq.c
index 8437ea7430fe..83a4f91bce5a 100644
--- a/arch/sh/kernel/cpu/sh4/sq.c
+++ b/arch/sh/kernel/cpu/sh4/sq.c
@@ -417,7 +417,6 @@ static struct file_operations sq_fops = {
 static struct miscdevice sq_dev = {
        .minor          = STORE_QUEUE_MINOR,
        .name           = "sq",
-        .devfs_name     = "cpu/sq",
        .fops           = &sq_fops,
 };
diff --git a/arch/sparc64/solaris/socksys.c b/arch/sparc64/solaris/socksys.c
index fc6669e8dde1..bc3df95bc057 100644
--- a/arch/sparc64/solaris/socksys.c
+++ b/arch/sparc64/solaris/socksys.c
@@ -26,7 +26,6 @@
 #include <linux/slab.h>
 #include <linux/syscalls.h>
 #include <linux/in.h>
-#include <linux/devfs_fs_kernel.h>
 #include <net/sock.h>
@@ -190,8 +189,6 @@ init_socksys(void)
                return ret;
        }
-        devfs_mk_cdev(MKDEV(30, 0), S_IFCHR|S_IRUSR|S_IWUSR, "socksys");
        file = fcheck(ret);
        /* N.B. Is this valid? Suppose the f_ops are in a module ... */
        socksys_file_ops = *file->f_op;
@@ -207,5 +204,4 @@ cleanup_socksys(void)
 {
        if (unregister_chrdev(30, "socksys"))
                printk ("Couldn't unregister socksys character device\n");
-        devfs_remove ("socksys");
 }
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index 6c2d4ccaf20f..5ca57ca33713 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -8,7 +8,6 @@
 #include "linux/list.h"
 #include "linux/kd.h"
 #include "linux/interrupt.h"
-#include "linux/devfs_fs_kernel.h"
 #include "asm/uaccess.h"
 #include "chan_kern.h"
 #include "irq_user.h"
@@ -655,7 +654,6 @@ struct tty_driver *line_register_devfs(struct lines *set,
        driver->driver_name = line_driver->name;
        driver->name = line_driver->device_name;
-        driver->devfs_name = line_driver->devfs_name;
        driver->major = line_driver->major;
        driver->minor_start = line_driver->minor_start;
        driver->type = line_driver->type;
diff --git a/arch/um/drivers/ssl.c b/arch/um/drivers/ssl.c
index a4d6415bc8c4..6dafd6fbfdae 100644
--- a/arch/um/drivers/ssl.c
+++ b/arch/um/drivers/ssl.c
@@ -54,7 +54,6 @@ static int ssl_remove(int n);
 static struct line_driver driver = {
        .name                   = "UML serial line",
        .device_name            = "ttyS",
-        .devfs_name             = "tts/",
        .major                  = TTY_MAJOR,
        .minor_start            = 64,
        .type                   = TTY_DRIVER_TYPE_SERIAL,
diff --git a/arch/um/drivers/stdio_console.c b/arch/um/drivers/stdio_console.c
index 61db8b2fc83f..856f568c2687 100644
--- a/arch/um/drivers/stdio_console.c
+++ b/arch/um/drivers/stdio_console.c
@@ -60,7 +60,6 @@ static int con_remove(int n);
 static struct line_driver driver = {
        .name                   = "UML console",
        .device_name            = "tty",
-        .devfs_name             = "vc/",
        .major                  = TTY_MAJOR,
        .minor_start            = 0,
        .type                   = TTY_DRIVER_TYPE_CONSOLE,
diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index 290cec6d69e2..0345e2551247 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -25,7 +25,6 @@
 #include "linux/blkdev.h"
 #include "linux/hdreg.h"
 #include "linux/init.h"
-#include "linux/devfs_fs_kernel.h"
 #include "linux/cdrom.h"
 #include "linux/proc_fs.h"
 #include "linux/ctype.h"
@@ -628,7 +627,6 @@ static int ubd_new_disk(int major, u64 size, int unit,
                        
 {
        struct gendisk *disk;
-        char from[sizeof("ubd/nnnnn\0")], to[sizeof("discnnnnn/disc\0")];
        int err;
        disk = alloc_disk(1 << UBD_SHIFT);
@@ -639,20 +637,10 @@ static int ubd_new_disk(int major, u64 size, int unit,
        disk->first_minor = unit << UBD_SHIFT;
        disk->fops = &ubd_blops;
        set_capacity(disk, size / 512);
-        if(major == MAJOR_NR){
+        if(major == MAJOR_NR)
                sprintf(disk->disk_name, "ubd%c", 'a' + unit);
-                sprintf(disk->devfs_name, "ubd/disc%d", unit);
+        else
-                sprintf(from, "ubd/%d", unit);
-                sprintf(to, "disc%d/disc", unit);
-                err = devfs_mk_symlink(from, to);
-                if(err)
-                        printk("ubd_new_disk failed to make link from %s to "
-                               "%s, error = %d\n", from, to, err);
-        }
-        else {
                sprintf(disk->disk_name, "ubd_fake%d", unit);
-                sprintf(disk->devfs_name, "ubd_fake/disc%d", unit);
-        }
        /* sysfs register (not for ide fake devices) */
        if (major == MAJOR_NR) {
@@ -841,7 +829,6 @@ int ubd_init(void)
 {
        int i;
-        devfs_mk_dir("ubd");
        if (register_blkdev(MAJOR_NR, "ubd"))
                return -1;
@@ -855,7 +842,6 @@ int ubd_init(void)
                char name[sizeof("ubd_nnn\0")];
                snprintf(name, sizeof(name), "ubd_%d", fake_major);
-                devfs_mk_dir(name);
                if (register_blkdev(fake_major, "ubd"))
                        return -1;
        }
diff --git a/arch/um/include/line.h b/arch/um/include/line.h
index 6ac0f8252e21..27bf2f6fbc05 100644
--- a/arch/um/include/line.h
+++ b/arch/um/include/line.h
@@ -17,7 +17,6 @@
 struct line_driver {
        char *name;
        char *device_name;
-        char *devfs_name;
        short major;
        short minor_start;
        short type;
diff --git a/drivers/block/DAC960.c b/drivers/block/DAC960.c
index dd8a1501142f..50ca1aa4ee3b 100644
--- a/drivers/block/DAC960.c
+++ b/drivers/block/DAC960.c
@@ -2530,7 +2530,6 @@ static boolean DAC960_RegisterBlockDevice(DAC960_Controller_T *Controller)
        blk_queue_max_sectors(RequestQueue, Controller->MaxBlocksPerCommand);
        disk->queue = RequestQueue;
        sprintf(disk->disk_name, "rd/c%dd%d", Controller->ControllerNumber, n);
-        sprintf(disk->devfs_name, "rd/host%d/target%d", Controller->ControllerNumber, n);
        disk->major = MajorNumber;
        disk->first_minor = n << DAC960_MaxPartitionsBits;
        disk->fops = &DAC960_BlockDeviceOperations;
diff --git a/drivers/block/acsi.c b/drivers/block/acsi.c
index 196c0ec9cd54..a317e4303952 100644
--- a/drivers/block/acsi.c
+++ b/drivers/block/acsi.c
@@ -1732,13 +1732,10 @@ int acsi_init( void )
                struct gendisk *disk = acsi_gendisk[i];
                sprintf(disk->disk_name, "ad%c", 'a'+i);
                aip = &acsi_info[NDevices];
-                sprintf(disk->devfs_name, "ad/target%d/lun%d", aip->target, aip->lun);
                disk->major = ACSI_MAJOR;
                disk->first_minor = i << 4;
-                if (acsi_info[i].type != HARDDISK) {
+                if (acsi_info[i].type != HARDDISK)
                        disk->minors = 1;
-                        strcat(disk->devfs_name, "/disc");
-                }
                disk->fops = &acsi_fops;
                disk->private_data = &acsi_info[i];
                set_capacity(disk, acsi_info[i].size);
diff --git a/drivers/block/acsi_slm.c b/drivers/block/acsi_slm.c
index 4cb9c1336287..4030a8fd1187 100644
--- a/drivers/block/acsi_slm.c
+++ b/drivers/block/acsi_slm.c
@@ -65,7 +65,6 @@ not be guaranteed. There are several ways to assure this:
 #include <linux/time.h>
 #include <linux/mm.h>
 #include <linux/slab.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/smp_lock.h>
 #include <asm/pgtable.h>
@@ -1005,11 +1004,6 @@ int slm_init( void )
        BufferP = SLMBuffer;
        SLMState = IDLE;
        
-        devfs_mk_dir("slm");
-        for (i = 0; i < MAX_SLM; i++) {
-                devfs_mk_cdev(MKDEV(ACSI_MAJOR, i),
-                                S_IFCHR|S_IRUSR|S_IWUSR, "slm/%d", i);
-        }
        return 0;
 }
@@ -1032,10 +1026,6 @@ int init_module(void)
 void cleanup_module(void)
 {
-        int i;
-        for (i = 0; i < MAX_SLM; i++)
-                devfs_remove("slm/%d", i);
-        devfs_remove("slm");
        if (unregister_chrdev( ACSI_MAJOR, "slm" ) != 0)
                printk( KERN_ERR "acsi_slm: cleanup_module failed\n");
        atari_stram_free( SLMBuffer );
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 39b0f53186e8..05fb08312c01 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -3248,7 +3248,6 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
                q->queuedata = hba[i];
                sprintf(disk->disk_name, "cciss/c%dd%d", i, j);
-                sprintf(disk->devfs_name, "cciss/host%d/target%d", i, j);
                disk->major = hba[i]->major;
                disk->first_minor = j << NWD_SHIFT;
                disk->fops = &cciss_fops;
diff --git a/drivers/block/cpqarray.c b/drivers/block/cpqarray.c
index 5eb6fb7b5cfa..bfd245df0a8c 100644
--- a/drivers/block/cpqarray.c
+++ b/drivers/block/cpqarray.c
@@ -33,7 +33,6 @@
 #include <linux/blkpg.h>
 #include <linux/timer.h>
 #include <linux/proc_fs.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/init.h>
 #include <linux/hdreg.h>
 #include <linux/spinlock.h>
@@ -348,7 +347,6 @@ static void __devexit cpqarray_remove_one(int i)
        for(j = 0; j < NWD; j++) {
                if (ida_gendisk[i][j]->flags & GENHD_FL_UP)
                        del_gendisk(ida_gendisk[i][j]);
-                devfs_remove("ida/c%dd%d",i,j);
                put_disk(ida_gendisk[i][j]);
        }
        blk_cleanup_queue(hba[i]->queue);
@@ -1807,8 +1805,6 @@ static void getgeometry(int ctlr)
                                }
-                                sprintf(disk->devfs_name, "ida/c%dd%d", ctlr, log_unit);
                                info_p->phys_drives =
                                    sense_config_buf->ctlr_phys_drv;
                                info_p->drv_assign_map
@@ -1844,7 +1840,6 @@ static void __exit cpqarray_exit(void)
                }
        }
-        devfs_remove("ida");
        remove_proc_entry("cpqarray", proc_root_driver);
 }
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index dff1e67b1dd4..0242cbb86a87 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -177,7 +177,6 @@ static int print_unex = 1;
 #include <linux/ioport.h>
 #include <linux/interrupt.h>
 #include <linux/init.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/platform_device.h>
 #include <linux/buffer_head.h>  /* for invalidate_buffers() */
 #include <linux/mutex.h>
@@ -224,7 +223,6 @@ static struct completion device_release;
 static unsigned short virtual_dma_port = 0x3f0;
 irqreturn_t floppy_interrupt(int irq, void *dev_id, struct pt_regs *regs);
 static int set_dor(int fdc, char mask, char data);
-static void register_devfs_entries(int drive) __init;
 #define K_64    0x10000         /* 64KB */
@@ -3676,7 +3674,6 @@ static void __init config_types(void)
                                first = 0;
                        }
                        printk("%s fd%d is %s", prepend, drive, name);
-                        register_devfs_entries(drive);
                }
                *UDP = *params;
        }
@@ -3954,37 +3951,6 @@ static struct block_device_operations floppy_fops = {
        .media_changed  = check_floppy_change,
        .revalidate_disk = floppy_revalidate,
 };
-static char *table[] = {
-        "", "d360", "h1200", "u360", "u720", "h360", "h720",
-        "u1440", "u2880", "CompaQ", "h1440", "u1680", "h410",
-        "u820", "h1476", "u1722", "h420", "u830", "h1494", "u1743",
-        "h880", "u1040", "u1120", "h1600", "u1760", "u1920",
-        "u3200", "u3520", "u3840", "u1840", "u800", "u1600",
-        NULL
-};
-static int t360[] = { 1, 0 },
-        t1200[] = { 2, 5, 6, 10, 12, 14, 16, 18, 20, 23, 0 },
-        t3in[] = { 8, 9, 26, 27, 28, 7, 11, 15, 19, 24, 25, 29, 31, 3, 4, 13,
-                        17, 21, 22, 30, 0 };
-static int *table_sup[] =
-    { NULL, t360, t1200, t3in + 5 + 8, t3in + 5, t3in, t3in };
-static void __init register_devfs_entries(int drive)
-{
-        int base_minor = (drive < 4) ? drive : (124 + drive);
-        if (UDP->cmos < ARRAY_SIZE(default_drive_params)) {
-                int i = 0;
-                do {
-                        int minor = base_minor + (table_sup[UDP->cmos][i] << 2);
-                        devfs_mk_bdev(MKDEV(FLOPPY_MAJOR, minor),
-                                      S_IFBLK | S_IRUSR | S_IWUSR | S_IRGRP |
-                                      S_IWGRP, "floppy/%d%s", drive,
-                                      table[table_sup[UDP->cmos][i]]);
-                } while (table_sup[UDP->cmos][i++]);
-        }
-}
 /*
 * Floppy Driver initialization
@@ -4261,11 +4227,9 @@ static int __init floppy_init(void)
                motor_off_timer[dr].function = motor_off_callback;
        }
-        devfs_mk_dir("floppy");
        err = register_blkdev(FLOPPY_MAJOR, "fd");
        if (err)
-                goto out_devfs_remove;
+                goto out_put_disk;
        floppy_queue = blk_init_queue(do_fd_request, &floppy_lock);
        if (!floppy_queue) {
@@ -4424,8 +4388,6 @@ out_unreg_region:
        blk_cleanup_queue(floppy_queue);
 out_unreg_blkdev:
        unregister_blkdev(FLOPPY_MAJOR, "fd");
-out_devfs_remove:
-        devfs_remove("floppy");
 out_put_disk:
        while (dr--) {
                del_timer(&motor_off_timer[dr]);
@@ -4586,19 +4548,6 @@ static void floppy_release_irq_and_dma(void)
 static char *floppy;
-static void unregister_devfs_entries(int drive)
-{
-        int i;
-        if (UDP->cmos < ARRAY_SIZE(default_drive_params)) {
-                i = 0;
-                do {
-                        devfs_remove("floppy/%d%s", drive,
-                                     table[table_sup[UDP->cmos][i]]);
-                } while (table_sup[UDP->cmos][i++]);
-        }
-}
 static void __init parse_floppy_cfg_string(char *cfg)
 {
        char *ptr;
@@ -4635,13 +4584,11 @@ void cleanup_module(void)
                if ((allowed_drive_mask & (1 << drive)) &&
                    fdc_state[FDC(drive)].version != FDC_NONE) {
                        del_gendisk(disks[drive]);
-                        unregister_devfs_entries(drive);
                        device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos);
                        platform_device_unregister(&floppy_device[drive]);
                }
                put_disk(disks[drive]);
        }
-        devfs_remove("floppy");
        del_timer_sync(&fd_timeout);
        del_timer_sync(&fd_timer);
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 18dd026f470d..013c5daddb0b 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -63,7 +63,6 @@
 #include <linux/blkdev.h>
 #include <linux/blkpg.h>
 #include <linux/init.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/smp_lock.h>
 #include <linux/swap.h>
 #include <linux/slab.h>
@@ -1277,8 +1276,6 @@ static int __init loop_init(void)
                        goto out_mem3;
        }
-        devfs_mk_dir("loop");
        for (i = 0; i < max_loop; i++) {
                struct loop_device *lo = &loop_dev[i];
                struct gendisk *disk = disks[i];
@@ -1296,7 +1293,6 @@ static int __init loop_init(void)
                disk->first_minor = i;
                disk->fops = &lo_fops;
                sprintf(disk->disk_name, "loop%d", i);
-                sprintf(disk->devfs_name, "loop/%d", i);
                disk->private_data = lo;
                disk->queue = lo->lo_queue;
        }
@@ -1310,7 +1306,6 @@ static int __init loop_init(void)
 out_mem4:
        while (i--)
                blk_cleanup_queue(loop_dev[i].lo_queue);
-        devfs_remove("loop");
        i = max_loop;
 out_mem3:
        while (i--)
@@ -1333,7 +1328,6 @@ static void loop_exit(void)
                blk_cleanup_queue(loop_dev[i].lo_queue);
                put_disk(disks[i]);
        }
-        devfs_remove("loop");
        if (unregister_blkdev(LOOP_MAJOR, "loop"))
                printk(KERN_WARNING "loop: cannot unregister blkdev\n");
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 7f554f2ed079..39662f0c9cce 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -29,8 +29,6 @@
 #include <linux/kernel.h>
 #include <net/sock.h>
-#include <linux/devfs_fs_kernel.h>
 #include <asm/uaccess.h>
 #include <asm/system.h>
 #include <asm/types.h>
@@ -642,7 +640,6 @@ static int __init nbd_init(void)
        printk(KERN_INFO "nbd: registered device at major %d\n", NBD_MAJOR);
        dprintk(DBG_INIT, "nbd: debugflags=0x%x\n", debugflags);
-        devfs_mk_dir("nbd");
        for (i = 0; i < nbds_max; i++) {
                struct gendisk *disk = nbd_dev[i].disk;
                nbd_dev[i].file = NULL;
@@ -660,7 +657,6 @@ static int __init nbd_init(void)
                disk->private_data = &nbd_dev[i];
                disk->flags |= GENHD_FL_SUPPRESS_PARTITION_INFO;
                sprintf(disk->disk_name, "nbd%d", i);
-                sprintf(disk->devfs_name, "nbd/%d", i);
                set_capacity(disk, 0x7ffffc00ULL << 1); /* 2 TB */
                add_disk(disk);
        }
@@ -686,7 +682,6 @@ static void __exit nbd_cleanup(void)
                        put_disk(disk);
                }
        }
-        devfs_remove("nbd");
        unregister_blkdev(NBD_MAJOR, "nbd");
        printk(KERN_INFO "nbd: unregistered device at major %d\n", NBD_MAJOR);
 }
diff --git a/drivers/block/paride/pg.c b/drivers/block/paride/pg.c
index 79b868254032..13f998aa1cd3 100644
--- a/drivers/block/paride/pg.c
+++ b/drivers/block/paride/pg.c
@@ -156,7 +156,6 @@ enum {D_PRT, D_PRO, D_UNI, D_MOD, D_SLV, D_DLY};
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/fs.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/delay.h>
 #include <linux/slab.h>
 #include <linux/mtio.h>
@@ -674,25 +673,15 @@ static int __init pg_init(void)
                err = PTR_ERR(pg_class);
                goto out_chrdev;
        }
-        devfs_mk_dir("pg");
        for (unit = 0; unit < PG_UNITS; unit++) {
                struct pg *dev = &devices[unit];
-                if (dev->present) {
+                if (dev->present)
                        class_device_create(pg_class, NULL, MKDEV(major, unit),
                                        NULL, "pg%u", unit);
-                        err = devfs_mk_cdev(MKDEV(major, unit),
-                                      S_IFCHR | S_IRUSR | S_IWUSR, "pg/%u",
-                                      unit);
-                        if (err) 
-                                goto out_class;
-                }
        }
        err = 0;
        goto out;
-out_class:
-        class_device_destroy(pg_class, MKDEV(major, unit));
-        class_destroy(pg_class);
 out_chrdev:
        unregister_chrdev(major, "pg");
 out:
@@ -705,13 +694,10 @@ static void __exit pg_exit(void)
        for (unit = 0; unit < PG_UNITS; unit++) {
                struct pg *dev = &devices[unit];
-                if (dev->present) {
+                if (dev->present)
                        class_device_destroy(pg_class, MKDEV(major, unit));
-                        devfs_remove("pg/%u", unit);
-                }
        }
        class_destroy(pg_class);
-        devfs_remove("pg");
        unregister_chrdev(major, name);
        for (unit = 0; unit < PG_UNITS; unit++) {
diff --git a/drivers/block/paride/pt.c b/drivers/block/paride/pt.c
index d2013d362403..35fb26636721 100644
--- a/drivers/block/paride/pt.c
+++ b/drivers/block/paride/pt.c
@@ -141,7 +141,6 @@ static int (*drives[4])[6] = {&drive0, &drive1, &drive2, &drive3};
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/fs.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/delay.h>
 #include <linux/slab.h>
 #include <linux/mtio.h>
@@ -971,32 +970,15 @@ static int __init pt_init(void)
                goto out_chrdev;
        }
-        devfs_mk_dir("pt");
        for (unit = 0; unit < PT_UNITS; unit++)
                if (pt[unit].present) {
                        class_device_create(pt_class, NULL, MKDEV(major, unit),
                                        NULL, "pt%d", unit);
-                        err = devfs_mk_cdev(MKDEV(major, unit),
-                                      S_IFCHR | S_IRUSR | S_IWUSR,
-                                      "pt/%d", unit);
-                        if (err) {
-                                class_device_destroy(pt_class, MKDEV(major, unit));
-                                goto out_class;
-                        }
                        class_device_create(pt_class, NULL, MKDEV(major, unit + 128),
                                        NULL, "pt%dn", unit);
-                        err = devfs_mk_cdev(MKDEV(major, unit + 128),
-                                      S_IFCHR | S_IRUSR | S_IWUSR,
-                                      "pt/%dn", unit);
-                        if (err) {
-                                class_device_destroy(pt_class, MKDEV(major, unit + 128));
-                                goto out_class;
-                        }
                }
        goto out;
-out_class:
-        class_destroy(pt_class);
 out_chrdev:
        unregister_chrdev(major, "pt");
 out:
@@ -1009,12 +991,9 @@ static void __exit pt_exit(void)
        for (unit = 0; unit < PT_UNITS; unit++)
                if (pt[unit].present) {
                        class_device_destroy(pt_class, MKDEV(major, unit));
-                        devfs_remove("pt/%d", unit);
                        class_device_destroy(pt_class, MKDEV(major, unit + 128));
-                        devfs_remove("pt/%dn", unit);
                }
        class_destroy(pt_class);
-        devfs_remove("pt");
        unregister_chrdev(major, name);
        for (unit = 0; unit < PT_UNITS; unit++)
                if (pt[unit].present)
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index a04f60693c39..3e4cce5e4736 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -2612,7 +2612,6 @@ static struct file_operations pkt_ctl_fops = {
 static struct miscdevice pkt_misc = {
        .minor          = MISC_DYNAMIC_MINOR,
        .name           = "pktcdvd",
-        .devfs_name     = "pktcdvd/control",
        .fops           = &pkt_ctl_fops
 };
diff --git a/drivers/block/ps2esdi.c b/drivers/block/ps2esdi.c
index bea75f2cb211..a729013a3973 100644
--- a/drivers/block/ps2esdi.c
+++ b/drivers/block/ps2esdi.c
@@ -421,7 +421,6 @@ static int __init ps2esdi_geninit(void)
                disk->major = PS2ESDI_MAJOR;
                disk->first_minor = i<<6;
                sprintf(disk->disk_name, "ed%c", 'a'+i);
-                sprintf(disk->devfs_name, "ed/target%d", i);
                disk->fops = &ps2esdi_fops;
                ps2esdi_gendisk[i] = disk;
        }
diff --git a/drivers/block/rd.c b/drivers/block/rd.c
index 0378da04cfa2..a9e1c2524c2a 100644
--- a/drivers/block/rd.c
+++ b/drivers/block/rd.c
@@ -50,7 +50,6 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/init.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/pagemap.h>
 #include <linux/blkdev.h>
 #include <linux/genhd.h>
@@ -412,7 +411,6 @@ static void __exit rd_cleanup(void)
                put_disk(rd_disks[i]);
                blk_cleanup_queue(rd_queue[i]);
        }
-        devfs_remove("rd");
        unregister_blkdev(RAMDISK_MAJOR, "ramdisk");
 }
@@ -442,8 +440,6 @@ static int __init rd_init(void)
                goto out;
        }
-        devfs_mk_dir("rd");
        for (i = 0; i < CONFIG_BLK_DEV_RAM_COUNT; i++) {
                struct gendisk *disk = rd_disks[i];
@@ -461,7 +457,6 @@ static int __init rd_init(void)
                disk->queue = rd_queue[i];
                disk->flags |= GENHD_FL_SUPPRESS_PARTITION_INFO;
                sprintf(disk->disk_name, "ram%d", i);
-                sprintf(disk->devfs_name, "rd/%d", i);
                set_capacity(disk, rd_size * 2);
                add_disk(rd_disks[i]);
        }
diff --git a/drivers/block/swim3.c b/drivers/block/swim3.c
index 01f042f6f1c4..628877945f9b 100644
--- a/drivers/block/swim3.c
+++ b/drivers/block/swim3.c
@@ -25,7 +25,6 @@
 #include <linux/fd.h>
 #include <linux/ioctl.h>
 #include <linux/blkdev.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/spinlock.h>
@@ -1019,8 +1018,6 @@ int swim3_init(void)
        int err = -ENOMEM;
        int i;
-        devfs_mk_dir("floppy");
        swim = find_devices("floppy");
        while (swim && (floppy_count < MAX_FLOPPIES))
        {
@@ -1064,7 +1061,6 @@ int swim3_init(void)
                disk->queue = swim3_queue;
                disk->flags |= GENHD_FL_REMOVABLE;
                sprintf(disk->disk_name, "fd%d", i);
-                sprintf(disk->devfs_name, "floppy/%d", i);
                set_capacity(disk, 2880);
                add_disk(disk);
        }
diff --git a/drivers/block/sx8.c b/drivers/block/sx8.c
index 8144ce9f4df0..10a4aa5fb54d 100644
--- a/drivers/block/sx8.c
+++ b/drivers/block/sx8.c
@@ -18,7 +18,6 @@
 #include <linux/spinlock.h>
 #include <linux/blkdev.h>
 #include <linux/sched.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/interrupt.h>
 #include <linux/compiler.h>
 #include <linux/workqueue.h>
@@ -1510,7 +1509,6 @@ static int carm_init_disks(struct carm_host *host)
                port->disk = disk;
                sprintf(disk->disk_name, DRV_NAME "/%u",
                        (unsigned int) (host->id * CARM_MAX_PORTS) + i);
-                sprintf(disk->devfs_name, DRV_NAME "/%u_%u", host->id, i);
                disk->major = host->major;
                disk->first_minor = i * CARM_MINORS_PER_MAJOR;
                disk->fops = &carm_bd_ops;
@@ -1672,8 +1670,6 @@ static int carm_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
        if (host->flags & FL_DYN_MAJOR)
                host->major = rc;
-        devfs_mk_dir(DRV_NAME);
        rc = carm_init_disks(host);
        if (rc)
                goto err_out_blkdev_disks;
@@ -1739,7 +1735,6 @@ static void carm_remove_one (struct pci_dev *pdev)
        free_irq(pdev->irq, host);
        carm_free_disks(host);
-        devfs_remove(DRV_NAME);
        unregister_blkdev(host->major, host->name);
        if (host->major == 160)
                clear_bit(0, &carm_major_alloc);
diff --git a/drivers/block/ub.c b/drivers/block/ub.c
index 60e9a9457c6b..d62b49fbf10c 100644
--- a/drivers/block/ub.c
+++ b/drivers/block/ub.c
@@ -24,12 +24,10 @@
 #include <linux/usb.h>
 #include <linux/usb_usual.h>
 #include <linux/blkdev.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/timer.h>
 #include <scsi/scsi.h>
 #define DRV_NAME "ub"
-#define DEVFS_NAME DRV_NAME
 #define UB_MAJOR 180
@@ -2291,7 +2289,6 @@ static int ub_probe_lun(struct ub_dev *sc, int lnum)
                goto err_diskalloc;
        sprintf(disk->disk_name, DRV_NAME "%c", lun->id + 'a');
-        sprintf(disk->devfs_name, DEVFS_NAME "/%c", lun->id + 'a');
        disk->major = UB_MAJOR;
        disk->first_minor = lun->id * UB_PARTS_PER_LUN;
        disk->fops = &ub_bd_fops;
@@ -2445,7 +2442,6 @@ static int __init ub_init(void)
        if ((rc = register_blkdev(UB_MAJOR, DRV_NAME)) != 0)
                goto err_regblkdev;
-        devfs_mk_dir(DEVFS_NAME);
        if ((rc = usb_register(&ub_driver)) != 0)
                goto err_register;
@@ -2454,7 +2450,6 @@ static int __init ub_init(void)
        return 0;
 err_register:
-        devfs_remove(DEVFS_NAME);
        unregister_blkdev(UB_MAJOR, DRV_NAME);
 err_regblkdev:
        return rc;
@@ -2464,7 +2459,6 @@ static void __exit ub_exit(void)
 {
        usb_deregister(&ub_driver);
-        devfs_remove(DEVFS_NAME);
        unregister_blkdev(UB_MAJOR, DRV_NAME);
        usb_usual_clear_present(USB_US_TYPE_UB);
 }
diff --git a/drivers/block/umem.c b/drivers/block/umem.c
index f7d4c65a7b8c..585197b95af7 100644
--- a/drivers/block/umem.c
+++ b/drivers/block/umem.c
@@ -1192,7 +1192,6 @@ static int __init mm_init(void)
        for (i = 0; i < num_cards; i++) {
                struct gendisk *disk = mm_gendisk[i];
                sprintf(disk->disk_name, "umem%c", 'a'+i);
-                sprintf(disk->devfs_name, "umem/card%d", i);
                spin_lock_init(&cards[i].lock);
                disk->major = major_nr;
                disk->first_minor  = i << MM_SHIFT;
diff --git a/drivers/block/viodasd.c b/drivers/block/viodasd.c
index b0df4f5ab97a..ec5a1b90a0a2 100644
--- a/drivers/block/viodasd.c
+++ b/drivers/block/viodasd.c
@@ -59,7 +59,6 @@ MODULE_LICENSE("GPL");
 * numbers 0-255 we get a maximum of 32 disks.
 */
 #define VIOD_GENHD_NAME         "iseries/vd"
-#define VIOD_GENHD_DEVFS_NAME   "iseries/disc"
 #define VIOD_VERS               "1.64"
@@ -523,8 +522,6 @@ retry:
        else
                snprintf(g->disk_name, sizeof(g->disk_name),
                                VIOD_GENHD_NAME "%c", 'a' + (dev_no % 26));
-        snprintf(g->devfs_name, sizeof(g->devfs_name),
-                        "%s%d", VIOD_GENHD_DEVFS_NAME, dev_no);
        g->fops = &viodasd_fops;
        g->queue = q;
        g->private_data = d;
diff --git a/drivers/block/xd.c b/drivers/block/xd.c
index cbce7c5e9445..e828e4cbd3e1 100644
--- a/drivers/block/xd.c
+++ b/drivers/block/xd.c
@@ -215,7 +215,6 @@ static int __init xd_init(void)
                disk->major = XT_DISK_MAJOR;
                disk->first_minor = i<<6;
                sprintf(disk->disk_name, "xd%c", i+'a');
-                sprintf(disk->devfs_name, "xd/target%d", i);
                disk->fops = &xd_fops;
                disk->private_data = p;
                disk->queue = xd_queue;
diff --git a/drivers/block/z2ram.c b/drivers/block/z2ram.c
index bb5e8d665a2a..82ddbdd7bd4b 100644
--- a/drivers/block/z2ram.c
+++ b/drivers/block/z2ram.c
@@ -354,7 +354,6 @@ z2_init(void)
    z2ram_gendisk->first_minor = 0;
    z2ram_gendisk->fops = &z2_fops;
    sprintf(z2ram_gendisk->disk_name, "z2ram");
-    strcpy(z2ram_gendisk->devfs_name, z2ram_gendisk->disk_name);
    z2ram_gendisk->queue = z2_queue;
    add_disk(z2ram_gendisk);
diff --git a/drivers/cdrom/aztcd.c b/drivers/cdrom/aztcd.c
index ec004897b634..ec469497c10f 100644
--- a/drivers/cdrom/aztcd.c
+++ b/drivers/cdrom/aztcd.c
@@ -1918,7 +1918,6 @@ static int __init aztcd_init(void)
        azt_disk->first_minor = 0;
        azt_disk->fops = &azt_fops;
        sprintf(azt_disk->disk_name, "aztcd");
-        sprintf(azt_disk->devfs_name, "aztcd");
        azt_disk->queue = azt_queue;
        add_disk(azt_disk);
        azt_invalidate_buffers();
diff --git a/drivers/cdrom/cdu31a.c b/drivers/cdrom/cdu31a.c
index 72ffd64e8b1e..5f0f2027f29e 100644
--- a/drivers/cdrom/cdu31a.c
+++ b/drivers/cdrom/cdu31a.c
@@ -161,7 +161,6 @@
 #include <linux/hdreg.h>
 #include <linux/genhd.h>
 #include <linux/ioport.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/string.h>
 #include <linux/slab.h>
 #include <linux/init.h>
diff --git a/drivers/cdrom/cm206.c b/drivers/cdrom/cm206.c
index f43a988dd413..4ee288688fed 100644
--- a/drivers/cdrom/cm206.c
+++ b/drivers/cdrom/cm206.c
@@ -187,7 +187,6 @@ History:
 #include <linux/interrupt.h>
 #include <linux/timer.h>
 #include <linux/cdrom.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/ioport.h>
 #include <linux/mm.h>
 #include <linux/slab.h>
diff --git a/drivers/cdrom/gscd.c b/drivers/cdrom/gscd.c
index ad5464ab99bc..b6ee50a2916d 100644
--- a/drivers/cdrom/gscd.c
+++ b/drivers/cdrom/gscd.c
@@ -955,7 +955,6 @@ static int __init gscd_init(void)
        gscd_disk->first_minor = 0;
        gscd_disk->fops = &gscd_fops;
        sprintf(gscd_disk->disk_name, "gscd");
-        sprintf(gscd_disk->devfs_name, "gscd");
        if (register_blkdev(MAJOR_NR, "gscd")) {
                ret = -EIO;
diff --git a/drivers/cdrom/mcdx.c b/drivers/cdrom/mcdx.c
index 0f6e7aab8d2c..788c7a0b2fe3 100644
--- a/drivers/cdrom/mcdx.c
+++ b/drivers/cdrom/mcdx.c
@@ -74,7 +74,6 @@ static const char *mcdx_c_version
 #include <linux/major.h>
 #define MAJOR_NR MITSUMI_X_CDROM_MAJOR
 #include <linux/blkdev.h>
-#include <linux/devfs_fs_kernel.h>
 #include "mcdx.h"
diff --git a/drivers/cdrom/optcd.c b/drivers/cdrom/optcd.c
index 0b0eab4f40fa..25032d7edc55 100644
--- a/drivers/cdrom/optcd.c
+++ b/drivers/cdrom/optcd.c
@@ -2033,7 +2033,6 @@ static int __init optcd_init(void)
        optcd_disk->first_minor = 0;
        optcd_disk->fops = &opt_fops;
        sprintf(optcd_disk->disk_name, "optcd");
-        sprintf(optcd_disk->devfs_name, "optcd");
        if (!request_region(optcd_port, 4, "optcd")) {
                printk(KERN_ERR "optcd: conflict, I/O port 0x%x already used\n",
diff --git a/drivers/cdrom/sbpcd.c b/drivers/cdrom/sbpcd.c
index 05c9e865ecaf..2fc966c65a0e 100644
--- a/drivers/cdrom/sbpcd.c
+++ b/drivers/cdrom/sbpcd.c
@@ -371,7 +371,6 @@
 #include <linux/kernel.h>
 #include <linux/cdrom.h>
 #include <linux/ioport.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/major.h>
 #include <linux/string.h>
 #include <linux/vmalloc.h>
@@ -5808,8 +5807,6 @@ int __init sbpcd_init(void)
                return -ENOMEM;
        }
-        devfs_mk_dir("sbp");
        for (j=0;j<NR_SBPCD;j++)
        {
                struct cdrom_device_info * sbpcd_infop;
@@ -5871,7 +5868,6 @@ int __init sbpcd_init(void)
                disk->fops = &sbpcd_bdops;
                strcpy(disk->disk_name, sbpcd_infop->name);
                disk->flags = GENHD_FL_CD;
-                sprintf(disk->devfs_name, "sbp/c0t%d", p->drv_id);
                p->disk = disk;
                if (register_cdrom(sbpcd_infop))
                {
@@ -5906,7 +5902,6 @@ static void sbpcd_exit(void)
                if (D_S[j].drv_id==-1) continue;
                del_gendisk(D_S[j].disk);
                put_disk(D_S[j].disk);
-                devfs_remove("sbp/c0t%d", j);
                vfree(D_S[j].sbp_buf);
                if (D_S[j].sbp_audsiz>0)
                        vfree(D_S[j].aud_buf);
@@ -5917,7 +5912,6 @@ static void sbpcd_exit(void)
                }
                vfree(D_S[j].sbpcd_infop);
        }
-        devfs_remove("sbp");
        msg(DBG_INF, "%s module released.\n", major_name);
 }
diff --git a/drivers/cdrom/sjcd.c b/drivers/cdrom/sjcd.c
index 74b1cadbf161..bf5aef4e555b 100644
--- a/drivers/cdrom/sjcd.c
+++ b/drivers/cdrom/sjcd.c
@@ -1695,7 +1695,6 @@ static int __init sjcd_init(void)
        sjcd_disk->first_minor = 0,
        sjcd_disk->fops = &sjcd_fops,
        sprintf(sjcd_disk->disk_name, "sjcd");
-        sprintf(sjcd_disk->devfs_name, "sjcd");
        if (!request_region(sjcd_base, 4,"sjcd")) {
                printk
diff --git a/drivers/cdrom/sonycd535.c b/drivers/cdrom/sonycd535.c
index e65659926432..8f7cc452af8d 100644
--- a/drivers/cdrom/sonycd535.c
+++ b/drivers/cdrom/sonycd535.c
@@ -1589,7 +1589,6 @@ static int __init sony535_init(void)
        cdu_disk->first_minor = 0;
        cdu_disk->fops = &cdu_fops;
        sprintf(cdu_disk->disk_name, "cdu");
-        sprintf(cdu_disk->devfs_name, "cdu535");
        if (!request_region(sony535_cd_base_io, 4, CDU535_HANDLE)) {
                printk(KERN_WARNING"sonycd535: Unable to request region 0x%x\n",
diff --git a/drivers/cdrom/viocd.c b/drivers/cdrom/viocd.c
index af6b3bfd169b..54ca931e19ea 100644
--- a/drivers/cdrom/viocd.c
+++ b/drivers/cdrom/viocd.c
@@ -49,7 +49,6 @@
 #include <asm/iseries/vio.h>
 #define VIOCD_DEVICE                    "iseries/vcd"
-#define VIOCD_DEVICE_DEVFS              "iseries/vcd"
 #define VIOCD_VERS "1.06"
@@ -688,8 +687,6 @@ static int viocd_probe(struct vio_dev *vdev, const struct vio_device_id *id)
        gendisk->first_minor = deviceno;
        strncpy(gendisk->disk_name, c->name,
                        sizeof(gendisk->disk_name));
-        snprintf(gendisk->devfs_name, sizeof(gendisk->devfs_name),
-                        VIOCD_DEVICE_DEVFS "%d", deviceno);
        blk_queue_max_hw_segments(q, 1);
        blk_queue_max_phys_segments(q, 1);
        blk_queue_max_sectors(q, 4096 / 512);
diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c
index 122e7a72a4e1..2657eeba7da6 100644
--- a/drivers/char/cyclades.c
+++ b/drivers/char/cyclades.c
@@ -5250,7 +5250,6 @@ cy_init(void)
    cy_serial_driver->owner = THIS_MODULE;
    cy_serial_driver->driver_name = "cyclades";
    cy_serial_driver->name = "ttyC";
-    cy_serial_driver->devfs_name = "tts/C";
    cy_serial_driver->major = CYCLADES_MAJOR;
    cy_serial_driver->minor_start = 0;
    cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
diff --git a/drivers/char/dsp56k.c b/drivers/char/dsp56k.c
index e233cf280bc0..09b413618b57 100644
--- a/drivers/char/dsp56k.c
+++ b/drivers/char/dsp56k.c
@@ -33,7 +33,6 @@
 #include <linux/fs.h>
 #include <linux/mm.h>
 #include <linux/init.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/smp_lock.h>
 #include <linux/device.h>
@@ -518,17 +517,9 @@ static int __init dsp56k_init_driver(void)
        }
        class_device_create(dsp56k_class, NULL, MKDEV(DSP56K_MAJOR, 0), NULL, "dsp56k");
-        err = devfs_mk_cdev(MKDEV(DSP56K_MAJOR, 0),
-                      S_IFCHR | S_IRUSR | S_IWUSR, "dsp56k");
-        if(err)
-                goto out_class;
        printk(banner);
        goto out;
-out_class:
-        class_device_destroy(dsp56k_class, MKDEV(DSP56K_MAJOR, 0));
-        class_destroy(dsp56k_class);
 out_chrdev:
        unregister_chrdev(DSP56K_MAJOR, "dsp56k");
 out:
@@ -541,7 +532,6 @@ static void __exit dsp56k_cleanup_driver(void)
        class_device_destroy(dsp56k_class, MKDEV(DSP56K_MAJOR, 0));
        class_destroy(dsp56k_class);
        unregister_chrdev(DSP56K_MAJOR, "dsp56k");
-        devfs_remove("dsp56k");
 }
 module_exit(dsp56k_cleanup_driver);
diff --git a/drivers/char/dtlk.c b/drivers/char/dtlk.c
index 87dcaa237f07..da2c89f1b8bc 100644
--- a/drivers/char/dtlk.c
+++ b/drivers/char/dtlk.c
@@ -62,7 +62,6 @@
 #include <linux/init.h>         /* for __init, module_{init,exit} */
 #include <linux/poll.h>         /* for POLLIN, etc. */
 #include <linux/dtlk.h>         /* local header file for DoubleTalk values */
-#include <linux/devfs_fs_kernel.h>
 #include <linux/smp_lock.h>
 #ifdef TRACING
@@ -337,9 +336,6 @@ static int __init dtlk_init(void)
        if (dtlk_dev_probe() == 0)
                printk(", MAJOR %d\n", dtlk_major);
-        devfs_mk_cdev(MKDEV(dtlk_major, DTLK_MINOR),
-                       S_IFCHR | S_IRUSR | S_IWUSR, "dtlk");
        init_timer(&dtlk_timer);
        dtlk_timer.function = dtlk_timer_tick;
        init_waitqueue_head(&dtlk_process_list);
@@ -357,7 +353,6 @@ static void __exit dtlk_cleanup (void)
        dtlk_write_tts(DTLK_CLEAR);
        unregister_chrdev(dtlk_major, "dtlk");
-        devfs_remove("dtlk");
        release_region(dtlk_port_lpc, DTLK_IO_EXTENT);
 }
diff --git a/drivers/char/epca.c b/drivers/char/epca.c
index dc0602ae8503..d0b3890d9302 100644
--- a/drivers/char/epca.c
+++ b/drivers/char/epca.c
@@ -1232,7 +1232,6 @@ static int __init pc_init(void)
        pc_driver->owner = THIS_MODULE;
        pc_driver->name = "ttyD"; 
-        pc_driver->devfs_name = "tts/D";
        pc_driver->major = DIGI_MAJOR; 
        pc_driver->minor_start = 0;
        pc_driver->type = TTY_DRIVER_TYPE_SERIAL;
diff --git a/drivers/char/esp.c b/drivers/char/esp.c
index 922174d527ae..9827d170ca17 100644
--- a/drivers/char/esp.c
+++ b/drivers/char/esp.c
@@ -2449,7 +2449,6 @@ static int __init espserial_init(void)
        
        esp_driver->owner = THIS_MODULE;
        esp_driver->name = "ttyP";
-        esp_driver->devfs_name = "tts/P";
        esp_driver->major = ESP_IN_MAJOR;
        esp_driver->minor_start = 0;
        esp_driver->type = TTY_DRIVER_TYPE_SERIAL;
diff --git a/drivers/char/ftape/zftape/zftape-init.c b/drivers/char/ftape/zftape/zftape-init.c
index 821357ce7e0e..3eeb869a9a11 100644
--- a/drivers/char/ftape/zftape/zftape-init.c
+++ b/drivers/char/ftape/zftape/zftape-init.c
@@ -33,7 +33,6 @@
 #endif
 #include <linux/fcntl.h>
 #include <linux/smp_lock.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/zftape.h>
 #include <linux/init.h>
@@ -332,29 +331,11 @@ KERN_INFO
        zft_class = class_create(THIS_MODULE, "zft");
        for (i = 0; i < 4; i++) {
                class_device_create(zft_class, NULL, MKDEV(QIC117_TAPE_MAJOR, i), NULL, "qft%i", i);
-                devfs_mk_cdev(MKDEV(QIC117_TAPE_MAJOR, i),
-                                S_IFCHR | S_IRUSR | S_IWUSR,
-                                "qft%i", i);
                class_device_create(zft_class, NULL, MKDEV(QIC117_TAPE_MAJOR, i + 4), NULL, "nqft%i", i);
-                devfs_mk_cdev(MKDEV(QIC117_TAPE_MAJOR, i + 4),
-                                S_IFCHR | S_IRUSR | S_IWUSR,
-                                "nqft%i", i);
                class_device_create(zft_class, NULL, MKDEV(QIC117_TAPE_MAJOR, i + 16), NULL, "zqft%i", i);
-                devfs_mk_cdev(MKDEV(QIC117_TAPE_MAJOR, i + 16),
-                                S_IFCHR | S_IRUSR | S_IWUSR,
-                                "zqft%i", i);
                class_device_create(zft_class, NULL, MKDEV(QIC117_TAPE_MAJOR, i + 20), NULL, "nzqft%i", i);
-                devfs_mk_cdev(MKDEV(QIC117_TAPE_MAJOR, i + 20),
-                                S_IFCHR | S_IRUSR | S_IWUSR,
-                                "nzqft%i", i);
                class_device_create(zft_class, NULL, MKDEV(QIC117_TAPE_MAJOR, i + 32), NULL, "rawqft%i", i);
-                devfs_mk_cdev(MKDEV(QIC117_TAPE_MAJOR, i + 32),
-                                S_IFCHR | S_IRUSR | S_IWUSR,
-                                "rawqft%i", i);
                class_device_create(zft_class, NULL, MKDEV(QIC117_TAPE_MAJOR, i + 36), NULL, "nrawrawqft%i", i);
-                devfs_mk_cdev(MKDEV(QIC117_TAPE_MAJOR, i + 36),
-                                S_IFCHR | S_IRUSR | S_IWUSR,
-                                "nrawqft%i", i);
        }
 #ifdef CONFIG_ZFT_COMPRESSOR
@@ -380,17 +361,11 @@ static void zft_exit(void)
                TRACE(ft_t_info, "successful");
        }
        for (i = 0; i < 4; i++) {
-                devfs_remove("qft%i", i);
                class_device_destroy(zft_class, MKDEV(QIC117_TAPE_MAJOR, i));
-                devfs_remove("nqft%i", i);
                class_device_destroy(zft_class, MKDEV(QIC117_TAPE_MAJOR, i + 4));
-                devfs_remove("zqft%i", i);
                class_device_destroy(zft_class, MKDEV(QIC117_TAPE_MAJOR, i + 16));
-                devfs_remove("nzqft%i", i);
                class_device_destroy(zft_class, MKDEV(QIC117_TAPE_MAJOR, i + 20));
-                devfs_remove("rawqft%i", i);
                class_device_destroy(zft_class, MKDEV(QIC117_TAPE_MAJOR, i + 32));
-                devfs_remove("nrawqft%i", i);
                class_device_destroy(zft_class, MKDEV(QIC117_TAPE_MAJOR, i + 36));
        }
        class_destroy(zft_class);
diff --git a/drivers/char/hvc_console.c b/drivers/char/hvc_console.c
index a5c6a9d7ff08..6e380aecea6a 100644
--- a/drivers/char/hvc_console.c
+++ b/drivers/char/hvc_console.c
@@ -820,7 +820,6 @@ int __init hvc_init(void)
                return -ENOMEM;
        drv->owner = THIS_MODULE;
-        drv->devfs_name = "hvc/";
        drv->driver_name = "hvc";
        drv->name = "hvc";
        drv->major = HVC_MAJOR;
diff --git a/drivers/char/hvcs.c b/drivers/char/hvcs.c
index afa26b65dac3..130dedc37568 100644
--- a/drivers/char/hvcs.c
+++ b/drivers/char/hvcs.c
@@ -1363,7 +1363,6 @@ static int __init hvcs_module_init(void)
        hvcs_tty_driver->driver_name = hvcs_driver_name;
        hvcs_tty_driver->name = hvcs_device_node;
-        hvcs_tty_driver->devfs_name = hvcs_device_node;
        /*
         * We'll let the system assign us a major number, indicated by leaving
diff --git a/drivers/char/hvsi.c b/drivers/char/hvsi.c
index a0370ed752ce..7b04eb153205 100644
--- a/drivers/char/hvsi.c
+++ b/drivers/char/hvsi.c
@@ -1154,7 +1154,6 @@ static int __init hvsi_init(void)
                return -ENOMEM;
        hvsi_driver->owner = THIS_MODULE;
-        hvsi_driver->devfs_name = "hvsi/";
        hvsi_driver->driver_name = "hvsi";
        hvsi_driver->name = "hvsi";
        hvsi_driver->major = HVSI_MAJOR;
diff --git a/drivers/char/ip2/ip2main.c b/drivers/char/ip2/ip2main.c
index 9ab33c3d359f..8619542766cb 100644
--- a/drivers/char/ip2/ip2main.c
+++ b/drivers/char/ip2/ip2main.c
@@ -91,7 +91,6 @@
 #include <linux/module.h>
 #include <linux/signal.h>
 #include <linux/sched.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/timer.h>
 #include <linux/interrupt.h>
 #include <linux/pci.h>
@@ -414,9 +413,7 @@ cleanup_module(void)
                        /* free io addresses and Tibet */
                        release_region( ip2config.addr[i], 8 );
                        class_device_destroy(ip2_class, MKDEV(IP2_IPL_MAJOR, 4 * i));
-                        devfs_remove("ip2/ipl%d", i);
                        class_device_destroy(ip2_class, MKDEV(IP2_IPL_MAJOR, 4 * i + 1));
-                        devfs_remove("ip2/stat%d", i);
                }
                /* Disable and remove interrupt handler. */
                if ( (ip2config.irq[i] > 0) && have_requested_irq(ip2config.irq[i]) ) { 
@@ -425,7 +422,6 @@ cleanup_module(void)
                }
        }
        class_destroy(ip2_class);
-        devfs_remove("ip2");
        if ( ( err = tty_unregister_driver ( ip2_tty_driver ) ) ) {
                printk(KERN_ERR "IP2: failed to unregister tty driver (%d)\n", err);
        }
@@ -675,7 +671,6 @@ ip2_loadmain(int *iop, int *irqp, unsigned char *firmware, int firmsize)
        ip2_tty_driver->owner               = THIS_MODULE;
        ip2_tty_driver->name                 = "ttyF";
-        ip2_tty_driver->devfs_name          = "tts/F";
        ip2_tty_driver->driver_name          = pcDriver_name;
        ip2_tty_driver->major                = IP2_TTY_MAJOR;
        ip2_tty_driver->minor_start          = 0;
@@ -683,7 +678,7 @@ ip2_loadmain(int *iop, int *irqp, unsigned char *firmware, int firmsize)
        ip2_tty_driver->subtype              = SERIAL_TYPE_NORMAL;
        ip2_tty_driver->init_termios         = tty_std_termios;
        ip2_tty_driver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
-        ip2_tty_driver->flags                = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
+        ip2_tty_driver->flags                = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
        tty_set_operations(ip2_tty_driver, &ip2_ops);
        ip2trace (ITRC_NO_PORT, ITRC_INIT, 3, 0 );
@@ -724,26 +719,9 @@ ip2_loadmain(int *iop, int *irqp, unsigned char *firmware, int firmsize)
                                class_device_create(ip2_class, NULL,
                                                MKDEV(IP2_IPL_MAJOR, 4 * i),
                                                NULL, "ipl%d", i);
-                                err = devfs_mk_cdev(MKDEV(IP2_IPL_MAJOR, 4 * i),
-                                                S_IRUSR | S_IWUSR | S_IRGRP | S_IFCHR,
-                                                "ip2/ipl%d", i);
-                                if (err) {
-                                        class_device_destroy(ip2_class,
-                                                MKDEV(IP2_IPL_MAJOR, 4 * i));
-                                        goto out_class;
-                                }
                                class_device_create(ip2_class, NULL,
                                                MKDEV(IP2_IPL_MAJOR, 4 * i + 1),
                                                NULL, "stat%d", i);
-                                err = devfs_mk_cdev(MKDEV(IP2_IPL_MAJOR, 4 * i + 1),
-                                                S_IRUSR | S_IWUSR | S_IRGRP | S_IFCHR,
-                                                "ip2/stat%d", i);
-                                if (err) {
-                                        class_device_destroy(ip2_class,
-                                                MKDEV(IP2_IPL_MAJOR, 4 * i + 1));
-                                        goto out_class;
-                                }
                            for ( box = 0; box < ABS_MAX_BOXES; ++box )
                            {
diff --git a/drivers/char/ipmi/ipmi_devintf.c b/drivers/char/ipmi/ipmi_devintf.c
index e1c95374984c..da637adbbfaa 100644
--- a/drivers/char/ipmi/ipmi_devintf.c
+++ b/drivers/char/ipmi/ipmi_devintf.c
@@ -40,7 +40,6 @@
 #include <linux/poll.h>
 #include <linux/spinlock.h>
 #include <linux/slab.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/ipmi.h>
 #include <linux/mutex.h>
 #include <linux/init.h>
@@ -804,9 +803,6 @@ static void ipmi_new_smi(int if_num, struct device *device)
        dev_t dev = MKDEV(ipmi_major, if_num);
        struct ipmi_reg_list *entry;
-        devfs_mk_cdev(dev, S_IFCHR | S_IRUSR | S_IWUSR,
-                      "ipmidev/%d", if_num);
        entry = kmalloc(sizeof(*entry), GFP_KERNEL);
        if (!entry) {
                printk(KERN_ERR "ipmi_devintf: Unable to create the"
@@ -836,7 +832,6 @@ static void ipmi_smi_gone(int if_num)
        }
        class_device_destroy(ipmi_class, dev);
        mutex_unlock(&reg_list_mutex);
-        devfs_remove("ipmidev/%d", if_num);
 }
 static struct ipmi_smi_watcher smi_watcher =
@@ -872,8 +867,6 @@ static __init int init_ipmi_devintf(void)
                ipmi_major = rv;
        }
-        devfs_mk_dir(DEVICE_NAME);
        rv = ipmi_smi_watcher_register(&smi_watcher);
        if (rv) {
                unregister_chrdev(ipmi_major, DEVICE_NAME);
@@ -898,7 +891,6 @@ static __exit void cleanup_ipmi(void)
        mutex_unlock(&reg_list_mutex);
        class_destroy(ipmi_class);
        ipmi_smi_watcher_unregister(&smi_watcher);
-        devfs_remove(DEVICE_NAME);
        unregister_chrdev(ipmi_major, DEVICE_NAME);
 }
 module_exit(cleanup_ipmi);
diff --git a/drivers/char/isicom.c b/drivers/char/isicom.c
index efaaa1937ab6..478bf4d7d065 100644
--- a/drivers/char/isicom.c
+++ b/drivers/char/isicom.c
@@ -1581,7 +1581,6 @@ static int __devinit isicom_register_tty_driver(void)
        isicom_normal->owner                    = THIS_MODULE;
        isicom_normal->name                     = "ttyM";
-        isicom_normal->devfs_name               = "isicom/";
        isicom_normal->major                    = ISICOM_NMAJOR;
        isicom_normal->minor_start              = 0;
        isicom_normal->type                     = TTY_DRIVER_TYPE_SERIAL;
diff --git a/drivers/char/istallion.c b/drivers/char/istallion.c
index 216c79256de3..c74e5660a9b7 100644
--- a/drivers/char/istallion.c
+++ b/drivers/char/istallion.c
@@ -39,7 +39,6 @@
 #include <linux/ioport.h>
 #include <linux/delay.h>
 #include <linux/init.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/device.h>
 #include <linux/wait.h>
 #include <linux/eisa.h>
@@ -826,11 +825,8 @@ static void __exit istallion_module_exit(void)
                return;
        }
        put_tty_driver(stli_serial);
-        for (i = 0; i < 4; i++) {
+        for (i = 0; i < 4; i++)
-                devfs_remove("staliomem/%d", i);
                class_device_destroy(istallion_class, MKDEV(STL_SIOMEMMAJOR, i));
-        }
-        devfs_remove("staliomem");
        class_destroy(istallion_class);
        if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
                printk("STALLION: failed to un-register serial memory device, "
@@ -4728,16 +4724,11 @@ int __init stli_init(void)
                printk(KERN_ERR "STALLION: failed to register serial memory "
                                "device\n");
-        devfs_mk_dir("staliomem");
        istallion_class = class_create(THIS_MODULE, "staliomem");
-        for (i = 0; i < 4; i++) {
+        for (i = 0; i < 4; i++)
-                devfs_mk_cdev(MKDEV(STL_SIOMEMMAJOR, i),
-                               S_IFCHR | S_IRUSR | S_IWUSR,
-                               "staliomem/%d", i);
                class_device_create(istallion_class, NULL,
                                MKDEV(STL_SIOMEMMAJOR, i),
                                NULL, "staliomem%d", i);
-        }
 /*
 *      Set up the tty driver structure and register us as a driver.
diff --git a/drivers/char/lp.c b/drivers/char/lp.c
index e57260525293..b11a390581ba 100644
--- a/drivers/char/lp.c
+++ b/drivers/char/lp.c
@@ -120,7 +120,6 @@
 #include <linux/major.h>
 #include <linux/sched.h>
 #include <linux/smp_lock.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/slab.h>
 #include <linux/fcntl.h>
 #include <linux/delay.h>
@@ -807,8 +806,6 @@ static int lp_register(int nr, struct parport *port)
        class_device_create(lp_class, NULL, MKDEV(LP_MAJOR, nr), NULL,
                                "lp%d", nr);
-        devfs_mk_cdev(MKDEV(LP_MAJOR, nr), S_IFCHR | S_IRUGO | S_IWUGO,
-                        "printers/%d", nr);
        printk(KERN_INFO "lp%d: using %s (%s).\n", nr, port->name, 
               (port->irq == PARPORT_IRQ_NONE)?"polling":"interrupt-driven");
@@ -907,7 +904,6 @@ static int __init lp_init (void)
                return -EIO;
        }
-        devfs_mk_dir("printers");
        lp_class = class_create(THIS_MODULE, "printer");
        if (IS_ERR(lp_class)) {
                err = PTR_ERR(lp_class);
@@ -933,7 +929,6 @@ static int __init lp_init (void)
 out_class:
        class_destroy(lp_class);
 out_devfs:
-        devfs_remove("printers");
        unregister_chrdev(LP_MAJOR, "lp");
        return err;
 }
@@ -981,10 +976,8 @@ static void lp_cleanup_module (void)
                if (lp_table[offset].dev == NULL)
                        continue;
                parport_unregister_device(lp_table[offset].dev);
-                devfs_remove("printers/%d", offset);
                class_device_destroy(lp_class, MKDEV(LP_MAJOR, offset));
        }
-        devfs_remove("printers");
        class_destroy(lp_class);
 }
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 1fa9fa157c12..6fe7b6c6c462 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -20,7 +20,6 @@
 #include <linux/tty.h>
 #include <linux/capability.h>
 #include <linux/smp_lock.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/ptrace.h>
 #include <linux/device.h>
 #include <linux/highmem.h>
@@ -941,13 +940,10 @@ static int __init chr_dev_init(void)
                printk("unable to get major %d for memory devs\n", MEM_MAJOR);
        mem_class = class_create(THIS_MODULE, "mem");
-        for (i = 0; i < ARRAY_SIZE(devlist); i++) {
+        for (i = 0; i < ARRAY_SIZE(devlist); i++)
                class_device_create(mem_class, NULL,
                                        MKDEV(MEM_MAJOR, devlist[i].minor),
                                        NULL, devlist[i].name);
-                devfs_mk_cdev(MKDEV(MEM_MAJOR, devlist[i].minor),
-                                S_IFCHR | devlist[i].mode, devlist[i].name);
-        }
        
        return 0;
 }
diff --git a/drivers/char/misc.c b/drivers/char/misc.c
index 96eb2a709e21..dfe1cede3916 100644
--- a/drivers/char/misc.c
+++ b/drivers/char/misc.c
@@ -44,7 +44,6 @@
 #include <linux/slab.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/stat.h>
 #include <linux/init.h>
 #include <linux/device.h>
@@ -204,7 +203,7 @@ int misc_register(struct miscdevice * misc)
 {
        struct miscdevice *c;
        dev_t dev;
-        int err;
+        int err = 0;
        down(&misc_sem);
        list_for_each_entry(c, &misc_list, list) {
@@ -228,10 +227,6 @@ int misc_register(struct miscdevice * misc)
        if (misc->minor < DYNAMIC_MINORS)
                misc_minors[misc->minor >> 3] |= 1 << (misc->minor & 7);
-        if (misc->devfs_name[0] == '\0') {
-                snprintf(misc->devfs_name, sizeof(misc->devfs_name),
-                                "misc/%s", misc->name);
-        }
        dev = MKDEV(MISC_MAJOR, misc->minor);
        misc->class = class_device_create(misc_class, NULL, dev, misc->dev,
@@ -241,13 +236,6 @@ int misc_register(struct miscdevice * misc)
                goto out;
        }
-        err = devfs_mk_cdev(dev, S_IFCHR|S_IRUSR|S_IWUSR|S_IRGRP, 
-                            misc->devfs_name);
-        if (err) {
-                class_device_destroy(misc_class, dev);
-                goto out;
-        }
        /*
         * Add it to the front, so that later devices can "override"
         * earlier defaults
@@ -278,7 +266,6 @@ int misc_deregister(struct miscdevice * misc)
        down(&misc_sem);
        list_del(&misc->list);
        class_device_destroy(misc_class, MKDEV(MISC_MAJOR, misc->minor));
-        devfs_remove(misc->devfs_name);
        if (i < DYNAMIC_MINORS && i>0) {
                misc_minors[i>>3] &= ~(1 << (misc->minor & 7));
        }
diff --git a/drivers/char/mmtimer.c b/drivers/char/mmtimer.c
index d65b3109318a..95e8122b8068 100644
--- a/drivers/char/mmtimer.c
+++ b/drivers/char/mmtimer.c
@@ -25,7 +25,6 @@
 #include <linux/init.h>
 #include <linux/errno.h>
 #include <linux/mm.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/mmtimer.h>
 #include <linux/miscdevice.h>
 #include <linux/posix-timers.h>
@@ -694,7 +693,6 @@ static int __init mmtimer_init(void)
                return -1;
        }
-        strcpy(mmtimer_miscdev.devfs_name, MMTIMER_NAME);
        if (misc_register(&mmtimer_miscdev)) {
                printk(KERN_ERR "%s: failed to register device\n",
                       MMTIMER_NAME);
diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c
index 01247cccb89f..52ef61f54ba0 100644
--- a/drivers/char/moxa.c
+++ b/drivers/char/moxa.c
@@ -342,7 +342,6 @@ static int __init moxa_init(void)
        init_MUTEX(&moxaBuffSem);
        moxaDriver->owner = THIS_MODULE;
        moxaDriver->name = "ttyMX";
-        moxaDriver->devfs_name = "tts/a";
        moxaDriver->major = ttymajor;
        moxaDriver->minor_start = 0;
        moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
diff --git a/drivers/char/ppdev.c b/drivers/char/ppdev.c
index bee6c47b45bd..24231d9743dc 100644
--- a/drivers/char/ppdev.c
+++ b/drivers/char/ppdev.c
@@ -60,7 +60,6 @@
 #include <linux/init.h>
 #include <linux/sched.h>
 #include <linux/device.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/ioctl.h>
 #include <linux/parport.h>
 #include <linux/ctype.h>
@@ -770,7 +769,7 @@ static struct parport_driver pp_driver = {
 static int __init ppdev_init (void)
 {
-        int i, err = 0;
+        int err = 0;
        if (register_chrdev (PP_MAJOR, CHRDEV, &pp_fops)) {
                printk (KERN_WARNING CHRDEV ": unable to get major %d\n",
@@ -782,11 +781,6 @@ static int __init ppdev_init (void)
                err = PTR_ERR(ppdev_class);
                goto out_chrdev;
        }
-        devfs_mk_dir("parports");
-        for (i = 0; i < PARPORT_MAX; i++) {
-                devfs_mk_cdev(MKDEV(PP_MAJOR, i),
-                                S_IFCHR | S_IRUGO | S_IWUGO, "parports/%d", i);
-        }
        if (parport_register_driver(&pp_driver)) {
                printk (KERN_WARNING CHRDEV ": unable to register with parport\n");
                goto out_class;
@@ -796,9 +790,6 @@ static int __init ppdev_init (void)
        goto out;
 out_class:
-        for (i = 0; i < PARPORT_MAX; i++)
-                devfs_remove("parports/%d", i);
-        devfs_remove("parports");
        class_destroy(ppdev_class);
 out_chrdev:
        unregister_chrdev(PP_MAJOR, CHRDEV);
@@ -808,12 +799,8 @@ out:
 static void __exit ppdev_cleanup (void)
 {
-        int i;
        /* Clean up all parport stuff */
-        for (i = 0; i < PARPORT_MAX; i++)
-                devfs_remove("parports/%d", i);
        parport_unregister_driver(&pp_driver);
-        devfs_remove("parports");
        class_destroy(ppdev_class);
        unregister_chrdev (PP_MAJOR, CHRDEV);
 }
diff --git a/drivers/char/pty.c b/drivers/char/pty.c
index 0c17f61549b4..9491e4307566 100644
--- a/drivers/char/pty.c
+++ b/drivers/char/pty.c
@@ -24,7 +24,6 @@
 #include <linux/major.h>
 #include <linux/mm.h>
 #include <linux/init.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/sysctl.h>
 #include <asm/uaccess.h>
@@ -265,7 +264,6 @@ static void __init legacy_pty_init(void)
        pty_driver->owner = THIS_MODULE;
        pty_driver->driver_name = "pty_master";
        pty_driver->name = "pty";
-        pty_driver->devfs_name = "pty/m";
        pty_driver->major = PTY_MASTER_MAJOR;
        pty_driver->minor_start = 0;
        pty_driver->type = TTY_DRIVER_TYPE_PTY;
@@ -283,7 +281,6 @@ static void __init legacy_pty_init(void)
        pty_slave_driver->owner = THIS_MODULE;
        pty_slave_driver->driver_name = "pty_slave";
        pty_slave_driver->name = "ttyp";
-        pty_slave_driver->devfs_name = "pty/s";
        pty_slave_driver->major = PTY_SLAVE_MAJOR;
        pty_slave_driver->minor_start = 0;
        pty_slave_driver->type = TTY_DRIVER_TYPE_PTY;
@@ -351,7 +348,6 @@ static int pty_unix98_ioctl(struct tty_struct *tty, struct file *file,
 static void __init unix98_pty_init(void)
 {
-        devfs_mk_dir("pts");
        ptm_driver = alloc_tty_driver(NR_UNIX98_PTY_MAX);
        if (!ptm_driver)
                panic("Couldn't allocate Unix98 ptm driver");
@@ -372,7 +368,7 @@ static void __init unix98_pty_init(void)
        ptm_driver->init_termios.c_cflag = B38400 | CS8 | CREAD;
        ptm_driver->init_termios.c_lflag = 0;
        ptm_driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_REAL_RAW |
-                TTY_DRIVER_NO_DEVFS | TTY_DRIVER_DEVPTS_MEM;
+                TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_DEVPTS_MEM;
        ptm_driver->other = pts_driver;
        tty_set_operations(ptm_driver, &pty_ops);
        ptm_driver->ioctl = pty_unix98_ioctl;
@@ -387,7 +383,7 @@ static void __init unix98_pty_init(void)
        pts_driver->init_termios = tty_std_termios;
        pts_driver->init_termios.c_cflag = B38400 | CS8 | CREAD;
        pts_driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_REAL_RAW |
-                TTY_DRIVER_NO_DEVFS | TTY_DRIVER_DEVPTS_MEM;
+                TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_DEVPTS_MEM;
        pts_driver->other = ptm_driver;
        tty_set_operations(pts_driver, &pty_ops);
        
diff --git a/drivers/char/raw.c b/drivers/char/raw.c
index 15a7b4086524..9bf97c5e38c0 100644
--- a/drivers/char/raw.c
+++ b/drivers/char/raw.c
@@ -10,7 +10,6 @@
 #include <linux/init.h>
 #include <linux/fs.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/major.h>
 #include <linux/blkdev.h>
 #include <linux/module.h>
@@ -288,7 +287,6 @@ static struct cdev raw_cdev = {
 static int __init raw_init(void)
 {
-        int i;
        dev_t dev = MKDEV(RAW_MAJOR, 0);
        if (register_chrdev_region(dev, MAX_RAW_MINORS, "raw"))
@@ -310,13 +308,6 @@ static int __init raw_init(void)
        }
        class_device_create(raw_class, NULL, MKDEV(RAW_MAJOR, 0), NULL, "rawctl");
-        devfs_mk_cdev(MKDEV(RAW_MAJOR, 0),
-                      S_IFCHR | S_IRUGO | S_IWUGO,
-                      "raw/rawctl");
-        for (i = 1; i < MAX_RAW_MINORS; i++)
-                devfs_mk_cdev(MKDEV(RAW_MAJOR, i),
-                              S_IFCHR | S_IRUGO | S_IWUGO,
-                              "raw/raw%d", i);
        return 0;
 error:
@@ -326,12 +317,6 @@ error:
 static void __exit raw_exit(void)
 {
-        int i;
-        for (i = 1; i < MAX_RAW_MINORS; i++)
-                devfs_remove("raw/raw%d", i);
-        devfs_remove("raw/rawctl");
-        devfs_remove("raw");
        class_device_destroy(raw_class, MKDEV(RAW_MAJOR, 0));
        class_destroy(raw_class);
        cdev_del(&raw_cdev);
diff --git a/drivers/char/riscom8.c b/drivers/char/riscom8.c
index 657c0d88f48c..c84c3c3f10c3 100644
--- a/drivers/char/riscom8.c
+++ b/drivers/char/riscom8.c
@@ -1634,7 +1634,6 @@ static inline int rc_init_drivers(void)
        memset(IRQ_to_board, 0, sizeof(IRQ_to_board));
        riscom_driver->owner = THIS_MODULE;
        riscom_driver->name = "ttyL";
-        riscom_driver->devfs_name = "tts/L";
        riscom_driver->major = RISCOM8_NORMAL_MAJOR;
        riscom_driver->type = TTY_DRIVER_TYPE_SERIAL;
        riscom_driver->subtype = SERIAL_TYPE_NORMAL;
diff --git a/drivers/char/rocket.c b/drivers/char/rocket.c
index 0708c5164c83..0ac131881322 100644
--- a/drivers/char/rocket.c
+++ b/drivers/char/rocket.c
@@ -2426,8 +2426,7 @@ static int __init rp_init(void)
         */
        rocket_driver->owner = THIS_MODULE;
-        rocket_driver->flags = TTY_DRIVER_NO_DEVFS;
+        rocket_driver->flags = TTY_DRIVER_DYNAMIC_DEV;
-        rocket_driver->devfs_name = "tts/R";
        rocket_driver->name = "ttyR";
        rocket_driver->driver_name = "Comtrol RocketPort";
        rocket_driver->major = TTY_ROCKET_MAJOR;
@@ -2438,7 +2437,7 @@ static int __init rp_init(void)
        rocket_driver->init_termios.c_cflag =
            B9600 | CS8 | CREAD | HUPCL | CLOCAL;
 #ifdef ROCKET_SOFT_FLOW
-        rocket_driver->flags |= TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
+        rocket_driver->flags |= TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
 #endif
        tty_set_operations(rocket_driver, &rocket_ops);
diff --git a/drivers/char/serial167.c b/drivers/char/serial167.c
index 037c940ac71b..c851eeaa4069 100644
--- a/drivers/char/serial167.c
+++ b/drivers/char/serial167.c
@@ -2235,7 +2235,6 @@ scrn[1] = '\0';
    /* Initialize the tty_driver structure */
    
    cy_serial_driver->owner = THIS_MODULE;
-    cy_serial_driver->devfs_name = "tts/";
    cy_serial_driver->name = "ttyS";
    cy_serial_driver->major = TTY_MAJOR;
    cy_serial_driver->minor_start = 64;
diff --git a/drivers/char/stallion.c b/drivers/char/stallion.c
index 00b4a2187164..0f7a542d9041 100644
--- a/drivers/char/stallion.c
+++ b/drivers/char/stallion.c
@@ -40,7 +40,6 @@
 #include <linux/ioport.h>
 #include <linux/init.h>
 #include <linux/smp_lock.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/device.h>
 #include <linux/delay.h>
@@ -757,11 +756,8 @@ static void __exit stallion_module_exit(void)
                        "errno=%d\n", -i);
                return;
        }
-        for (i = 0; i < 4; i++) {
+        for (i = 0; i < 4; i++)
-                devfs_remove("staliomem/%d", i);
                class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
-        }
-        devfs_remove("staliomem");
        if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
                printk("STALLION: failed to un-register serial memory device, "
                        "errno=%d\n", -i);
@@ -3044,22 +3040,16 @@ static int __init stl_init(void)
 */
        if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
                printk("STALLION: failed to register serial board device\n");
-        devfs_mk_dir("staliomem");
        stallion_class = class_create(THIS_MODULE, "staliomem");
-        for (i = 0; i < 4; i++) {
+        for (i = 0; i < 4; i++)
-                devfs_mk_cdev(MKDEV(STL_SIOMEMMAJOR, i),
-                                S_IFCHR|S_IRUSR|S_IWUSR,
-                                "staliomem/%d", i);
                class_device_create(stallion_class, NULL,
                                    MKDEV(STL_SIOMEMMAJOR, i), NULL,
                                    "staliomem%d", i);
-        }
        stl_serial->owner = THIS_MODULE;
        stl_serial->driver_name = stl_drvname;
        stl_serial->name = "ttyE";
-        stl_serial->devfs_name = "tts/E";
        stl_serial->major = STL_SERIALMAJOR;
        stl_serial->minor_start = 0;
        stl_serial->type = TTY_DRIVER_TYPE_SERIAL;
diff --git a/drivers/char/tipar.c b/drivers/char/tipar.c
index 079db5a935a1..f7802e5bd7ca 100644
--- a/drivers/char/tipar.c
+++ b/drivers/char/tipar.c
@@ -56,7 +56,6 @@
 #include <linux/ioport.h>
 #include <asm/io.h>
 #include <linux/bitops.h>
-#include <linux/devfs_fs_kernel.h>      /* DevFs support */
 #include <linux/parport.h>              /* Our code depend on parport */
 #include <linux/device.h>
@@ -443,12 +442,6 @@ tipar_register(int nr, struct parport *port)
        class_device_create(tipar_class, NULL, MKDEV(TIPAR_MAJOR,
                        TIPAR_MINOR + nr), NULL, "par%d", nr);
-        /* Use devfs, tree: /dev/ticables/par/[0..2] */
-        err = devfs_mk_cdev(MKDEV(TIPAR_MAJOR, TIPAR_MINOR + nr),
-                        S_IFCHR | S_IRUGO | S_IWUGO,
-                        "ticables/par/%d", nr);
-        if (err)
-                goto out_class;
        /* Display informations */
        pr_info("tipar%d: using %s (%s)\n", nr, port->name, (port->irq ==
@@ -460,11 +453,7 @@ tipar_register(int nr, struct parport *port)
                pr_info("tipar%d: link cable not found\n", nr);
        err = 0;
-        goto out;
-out_class:
-        class_device_destroy(tipar_class, MKDEV(TIPAR_MAJOR, TIPAR_MINOR + nr));
-        class_destroy(tipar_class);
 out:
        return err;
 }
@@ -507,9 +496,6 @@ tipar_init_module(void)
                goto out;
        }
-        /* Use devfs with tree: /dev/ticables/par/[0..2] */
-        devfs_mk_dir("ticables/par");
        tipar_class = class_create(THIS_MODULE, "ticables");
        if (IS_ERR(tipar_class)) {
                err = PTR_ERR(tipar_class);
@@ -528,7 +514,6 @@ out_class:
        class_destroy(tipar_class);
 out_chrdev:
-        devfs_remove("ticables/par");
        unregister_chrdev(TIPAR_MAJOR, "tipar");
 out:
        return err;     
@@ -549,10 +534,8 @@ tipar_cleanup_module(void)
                        continue;
                parport_unregister_device(table[i].dev);
                class_device_destroy(tipar_class, MKDEV(TIPAR_MAJOR, i));
-                devfs_remove("ticables/par/%d", i);
        }
        class_destroy(tipar_class);
-        devfs_remove("ticables/par");
        pr_info("tipar: module unloaded\n");
 }
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 8d19f7281f0b..a1143238feca 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -102,7 +102,6 @@
 #include <linux/kbd_kern.h>
 #include <linux/vt_kern.h>
 #include <linux/selection.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/kmod.h>
@@ -2955,8 +2954,8 @@ static struct class *tty_class;
 * Returns a pointer to the class device (or ERR_PTR(-EFOO) on error).
 *
 * This call is required to be made to register an individual tty device if
- * the tty driver's flags have the TTY_DRIVER_NO_DEVFS bit set.  If that
+ * the tty driver's flags have the TTY_DRIVER_DYNAMIC_DEV bit set.  If that
- * bit is not set, this function should not be called.
+ * bit is not set, this function should not be called by a tty driver.
 */
 struct class_device *tty_register_device(struct tty_driver *driver,
                                         unsigned index, struct device *device)
@@ -2970,9 +2969,6 @@ struct class_device *tty_register_device(struct tty_driver *driver,
                return ERR_PTR(-EINVAL);
        }
-        devfs_mk_cdev(dev, S_IFCHR | S_IRUSR | S_IWUSR,
-                        "%s%d", driver->devfs_name, index + driver->name_base);
        if (driver->type == TTY_DRIVER_TYPE_PTY)
                pty_line_name(driver, index, name);
        else
@@ -2991,7 +2987,6 @@ struct class_device *tty_register_device(struct tty_driver *driver,
 */
 void tty_unregister_device(struct tty_driver *driver, unsigned index)
 {
-        devfs_remove("%s%d", driver->devfs_name, index + driver->name_base);
        class_device_destroy(tty_class, MKDEV(driver->major, driver->minor_start) + index);
 }
@@ -3113,7 +3108,7 @@ int tty_register_driver(struct tty_driver *driver)
        
        list_add(&driver->tty_drivers, &tty_drivers);
        
-        if ( !(driver->flags & TTY_DRIVER_NO_DEVFS) ) {
+        if ( !(driver->flags & TTY_DRIVER_DYNAMIC_DEV) ) {
                for(i = 0; i < driver->num; i++)
                    tty_register_device(driver, i, NULL);
        }
@@ -3156,7 +3151,7 @@ int tty_unregister_driver(struct tty_driver *driver)
                        driver->termios_locked[i] = NULL;
                        kfree(tp);
                }
-                if (!(driver->flags & TTY_DRIVER_NO_DEVFS))
+                if (!(driver->flags & TTY_DRIVER_DYNAMIC_DEV))
                        tty_unregister_device(driver, i);
        }
        p = driver->ttys;
@@ -3232,14 +3227,12 @@ static int __init tty_init(void)
        if (cdev_add(&tty_cdev, MKDEV(TTYAUX_MAJOR, 0), 1) ||
            register_chrdev_region(MKDEV(TTYAUX_MAJOR, 0), 1, "/dev/tty") < 0)
                panic("Couldn't register /dev/tty driver\n");
-        devfs_mk_cdev(MKDEV(TTYAUX_MAJOR, 0), S_IFCHR|S_IRUGO|S_IWUGO, "tty");
        class_device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 0), NULL, "tty");
        cdev_init(&console_cdev, &console_fops);
        if (cdev_add(&console_cdev, MKDEV(TTYAUX_MAJOR, 1), 1) ||
            register_chrdev_region(MKDEV(TTYAUX_MAJOR, 1), 1, "/dev/console") < 0)
                panic("Couldn't register /dev/console driver\n");
-        devfs_mk_cdev(MKDEV(TTYAUX_MAJOR, 1), S_IFCHR|S_IRUSR|S_IWUSR, "console");
        class_device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 1), NULL, "console");
 #ifdef CONFIG_UNIX98_PTYS
@@ -3247,7 +3240,6 @@ static int __init tty_init(void)
        if (cdev_add(&ptmx_cdev, MKDEV(TTYAUX_MAJOR, 2), 1) ||
            register_chrdev_region(MKDEV(TTYAUX_MAJOR, 2), 1, "/dev/ptmx") < 0)
                panic("Couldn't register /dev/ptmx driver\n");
-        devfs_mk_cdev(MKDEV(TTYAUX_MAJOR, 2), S_IFCHR|S_IRUGO|S_IWUGO, "ptmx");
        class_device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 2), NULL, "ptmx");
 #endif
@@ -3256,7 +3248,6 @@ static int __init tty_init(void)
        if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
            register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
                panic("Couldn't register /dev/tty0 driver\n");
-        devfs_mk_cdev(MKDEV(TTY_MAJOR, 0), S_IFCHR|S_IRUSR|S_IWUSR, "vc/0");
        class_device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
        vty_init();
diff --git a/drivers/char/vc_screen.c b/drivers/char/vc_screen.c
index 3c1dafaa3441..234d7f3fb114 100644
--- a/drivers/char/vc_screen.c
+++ b/drivers/char/vc_screen.c
@@ -26,7 +26,6 @@
 #include <linux/major.h>
 #include <linux/errno.h>
 #include <linux/tty.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/sched.h>
 #include <linux/interrupt.h>
 #include <linux/mm.h>
@@ -478,12 +477,6 @@ static struct class *vc_class;
 void vcs_make_devfs(struct tty_struct *tty)
 {
-        devfs_mk_cdev(MKDEV(VCS_MAJOR, tty->index + 1),
-                        S_IFCHR|S_IRUSR|S_IWUSR,
-                        "vcc/%u", tty->index + 1);
-        devfs_mk_cdev(MKDEV(VCS_MAJOR, tty->index + 129),
-                        S_IFCHR|S_IRUSR|S_IWUSR,
-                        "vcc/a%u", tty->index + 1);
        class_device_create(vc_class, NULL, MKDEV(VCS_MAJOR, tty->index + 1),
                        NULL, "vcs%u", tty->index + 1);
        class_device_create(vc_class, NULL, MKDEV(VCS_MAJOR, tty->index + 129),
@@ -491,8 +484,6 @@ void vcs_make_devfs(struct tty_struct *tty)
 }
 void vcs_remove_devfs(struct tty_struct *tty)
 {
-        devfs_remove("vcc/%u", tty->index + 1);
-        devfs_remove("vcc/a%u", tty->index + 1);
        class_device_destroy(vc_class, MKDEV(VCS_MAJOR, tty->index + 1));
        class_device_destroy(vc_class, MKDEV(VCS_MAJOR, tty->index + 129));
 }
@@ -503,8 +494,6 @@ int __init vcs_init(void)
                panic("unable to get major %d for vcs device", VCS_MAJOR);
        vc_class = class_create(THIS_MODULE, "vc");
-        devfs_mk_cdev(MKDEV(VCS_MAJOR, 0), S_IFCHR|S_IRUSR|S_IWUSR, "vcc/0");
-        devfs_mk_cdev(MKDEV(VCS_MAJOR, 128), S_IFCHR|S_IRUSR|S_IWUSR, "vcc/a0");
        class_device_create(vc_class, NULL, MKDEV(VCS_MAJOR, 0), NULL, "vcs");
        class_device_create(vc_class, NULL, MKDEV(VCS_MAJOR, 128), NULL, "vcsa");
        return 0;
diff --git a/drivers/char/viocons.c b/drivers/char/viocons.c
index 4e5360388748..07f5ce4b28e3 100644
--- a/drivers/char/viocons.c
+++ b/drivers/char/viocons.c
@@ -1152,7 +1152,6 @@ static int __init viocons_init2(void)
        viotty_driver = alloc_tty_driver(VTTY_PORTS);
        viotty_driver->owner = THIS_MODULE;
        viotty_driver->driver_name = "vioconsole";
-        viotty_driver->devfs_name = "vcs/";
        viotty_driver->name = "tty";
        viotty_driver->name_base = 1;
        viotty_driver->major = TTY_MAJOR;
diff --git a/drivers/char/viotape.c b/drivers/char/viotape.c
index 11c7e9de5958..198f1505ae23 100644
--- a/drivers/char/viotape.c
+++ b/drivers/char/viotape.c
@@ -43,7 +43,6 @@
 #include <linux/dma-mapping.h>
 #include <linux/fs.h>
 #include <linux/cdev.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/major.h>
 #include <linux/completion.h>
 #include <linux/proc_fs.h>
@@ -246,7 +245,6 @@ static struct device *tape_device[VIOTAPE_MAX_TAPE];
 */
 static struct {
        unsigned char   cur_part;
-        int             dev_handle;
        unsigned char   part_stat_rwi[MAX_PARTITIONS];
 } state[VIOTAPE_MAX_TAPE];
@@ -959,12 +957,7 @@ static int viotape_probe(struct vio_dev *vdev, const struct vio_device_id *id)
                        "iseries!vt%d", i);
        class_device_create(tape_class, NULL, MKDEV(VIOTAPE_MAJOR, i | 0x80),
                        NULL, "iseries!nvt%d", i);
-        devfs_mk_cdev(MKDEV(VIOTAPE_MAJOR, i), S_IFCHR | S_IRUSR | S_IWUSR,
-                        "iseries/vt%d", i);
-        devfs_mk_cdev(MKDEV(VIOTAPE_MAJOR, i | 0x80),
-                        S_IFCHR | S_IRUSR | S_IWUSR, "iseries/nvt%d", i);
        sprintf(tapename, "iseries/vt%d", i);
-        state[i].dev_handle = devfs_register_tape(tapename);
        printk(VIOTAPE_KERN_INFO "tape %s is iSeries "
                        "resource %10.10s type %4.4s, model %3.3s\n",
                        tapename, viotape_unitinfo[i].rsrcname,
@@ -976,9 +969,6 @@ static int viotape_remove(struct vio_dev *vdev)
 {
        int i = vdev->unit_address;
-        devfs_remove("iseries/nvt%d", i);
-        devfs_remove("iseries/vt%d", i);
-        devfs_unregister_tape(state[i].dev_handle);
        class_device_destroy(tape_class, MKDEV(VIOTAPE_MAJOR, i | 0x80));
        class_device_destroy(tape_class, MKDEV(VIOTAPE_MAJOR, i));
        return 0;
diff --git a/drivers/char/vme_scc.c b/drivers/char/vme_scc.c
index fd00822ac145..fe99fc1aba45 100644
--- a/drivers/char/vme_scc.c
+++ b/drivers/char/vme_scc.c
@@ -147,7 +147,6 @@ static int scc_init_drivers(void)
        scc_driver->owner = THIS_MODULE;
        scc_driver->driver_name = "scc";
        scc_driver->name = "ttyS";
-        scc_driver->devfs_name = "tts/";
        scc_driver->major = TTY_MAJOR;
        scc_driver->minor_start = SCC_MINOR_BASE;
        scc_driver->type = TTY_DRIVER_TYPE_SERIAL;
diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index 714d95ff2f1e..d6f65032649a 100644
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -79,7 +79,6 @@
 #include <linux/mm.h>
 #include <linux/console.h>
 #include <linux/init.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/vt_kern.h>
 #include <linux/selection.h>
 #include <linux/tiocl.h>
@@ -2663,7 +2662,6 @@ int __init vty_init(void)
        if (!console_driver)
                panic("Couldn't allocate console driver\n");
        console_driver->owner = THIS_MODULE;
-        console_driver->devfs_name = "vc/";
        console_driver->name = "tty";
        console_driver->name_base = 1;
        console_driver->major = TTY_MAJOR;
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 99fa42402e71..bfafd4846a08 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -3527,8 +3527,6 @@ static int ide_cd_probe(ide_drive_t *drive)
        drive->driver_data = info;
        g->minors = 1;
-        snprintf(g->devfs_name, sizeof(g->devfs_name),
-                        "%s/cd", drive->devfs_name);
        g->driverfs_dev = &drive->gendev;
        g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
        if (ide_cdrom_setup(drive)) {
diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c
index f033d732f387..d0227c39ced1 100644
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -1018,7 +1018,6 @@ static void ide_disk_release(struct kref *kref)
        struct gendisk *g = idkp->disk;
        drive->driver_data = NULL;
-        drive->devfs_name[0] = '\0';
        g->private_data = NULL;
        put_disk(g);
        kfree(idkp);
@@ -1222,7 +1221,6 @@ static int ide_disk_probe(ide_drive_t *drive)
                drive->attach = 1;
        g->minors = 1 << PARTN_BITS;
-        strcpy(g->devfs_name, drive->devfs_name);
        g->driverfs_dev = &drive->gendev;
        g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
        set_capacity(g, idedisk_capacity(drive));
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 4656587aa2f7..68628327c0f5 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -2176,7 +2176,6 @@ static int ide_floppy_probe(ide_drive_t *drive)
        g->minors = 1 << PARTN_BITS;
        g->driverfs_dev = &drive->gendev;
-        strcpy(g->devfs_name, drive->devfs_name);
        g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
        g->fops = &idefloppy_ops;
        drive->attach = 1;
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 9ebf8ae2a5e3..0d5038a28560 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -47,7 +47,6 @@
 #include <linux/slab.h>
 #include <linux/delay.h>
 #include <linux/ide.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/spinlock.h>
 #include <linux/kmod.h>
 #include <linux/pci.h>
@@ -1279,10 +1278,6 @@ static void drive_release_dev (struct device *dev)
        ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
        spin_lock_irq(&ide_lock);
-        if (drive->devfs_name[0] != '\0') {
-                devfs_remove(drive->devfs_name);
-                drive->devfs_name[0] = '\0';
-        }
        ide_remove_drive_from_hwgroup(drive);
        kfree(drive->id);
        drive->id = NULL;
@@ -1316,12 +1311,6 @@ static void init_gendisk (ide_hwif_t *hwif)
                drive->gendev.bus = &ide_bus_type;
                drive->gendev.driver_data = drive;
                drive->gendev.release = drive_release_dev;
-                if (drive->present) {
-                        sprintf(drive->devfs_name, "ide/host%d/bus%d/target%d/lun%d",
-                                (hwif->channel && hwif->mate) ?
-                                hwif->mate->index : hwif->index,
-                                hwif->channel, unit, drive->lun);
-                }
        }
        blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
                        THIS_MODULE, ata_probe, ata_lock, hwif);
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index 09f3a7dab28a..4b91101e12b7 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -435,7 +435,6 @@
 #include <linux/interrupt.h>
 #include <linux/jiffies.h>
 #include <linux/major.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/errno.h>
 #include <linux/genhd.h>
 #include <linux/slab.h>
@@ -4726,9 +4725,6 @@ static void ide_tape_release(struct kref *kref)
                        MKDEV(IDETAPE_MAJOR, tape->minor));
        class_device_destroy(idetape_sysfs_class,
                        MKDEV(IDETAPE_MAJOR, tape->minor + 128));
-        devfs_remove("%s/mt", drive->devfs_name);
-        devfs_remove("%s/mtn", drive->devfs_name);
-        devfs_unregister_tape(g->number);
        idetape_devs[tape->minor] = NULL;
        g->private_data = NULL;
        put_disk(g);
@@ -4902,14 +4898,6 @@ static int ide_tape_probe(ide_drive_t *drive)
        class_device_create(idetape_sysfs_class, NULL,
                        MKDEV(IDETAPE_MAJOR, minor + 128), &drive->gendev, "n%s", tape->name);
-        devfs_mk_cdev(MKDEV(HWIF(drive)->major, minor),
-                        S_IFCHR | S_IRUGO | S_IWUGO,
-                        "%s/mt", drive->devfs_name);
-        devfs_mk_cdev(MKDEV(HWIF(drive)->major, minor + 128),
-                        S_IFCHR | S_IRUGO | S_IWUGO,
-                        "%s/mtn", drive->devfs_name);
-        g->number = devfs_register_tape(drive->devfs_name);
        g->fops = &idetape_block_ops;
        ide_register_region(g);
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index 59fe358048b3..1cdf44205162 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -147,7 +147,6 @@
 #include <linux/pci.h>
 #include <linux/delay.h>
 #include <linux/ide.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/completion.h>
 #include <linux/reboot.h>
 #include <linux/cdrom.h>
@@ -592,13 +591,8 @@ void ide_unregister(unsigned int index)
                goto abort;
        for (unit = 0; unit < MAX_DRIVES; ++unit) {
                drive = &hwif->drives[unit];
-                if (!drive->present) {
+                if (!drive->present)
-                        if (drive->devfs_name[0] != '\0') {
-                                devfs_remove(drive->devfs_name);
-                                drive->devfs_name[0] = '\0';
-                        }
                        continue;
-                }
                spin_unlock_irq(&ide_lock);
                device_unregister(&drive->gendev);
                wait_for_completion(&drive->gendev_rel_comp);
@@ -1996,7 +1990,6 @@ EXPORT_SYMBOL_GPL(ide_bus_type);
 static int __init ide_init(void)
 {
        printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
-        devfs_mk_dir("ide");
        system_bus_speed = ide_system_bus_speed();
        bus_register(&ide_bus_type);
@@ -2074,7 +2067,6 @@ void cleanup_module (void)
 #ifdef CONFIG_PROC_FS
        proc_ide_destroy();
 #endif
-        devfs_remove("ide");
        bus_unregister(&ide_bus_type);
 }
diff --git a/drivers/input/serio/serio_raw.c b/drivers/input/serio/serio_raw.c
index 5a2703b536dc..71a8eea816cb 100644
--- a/drivers/input/serio/serio_raw.c
+++ b/drivers/input/serio/serio_raw.c
@@ -16,7 +16,6 @@
 #include <linux/init.h>
 #include <linux/major.h>
 #include <linux/device.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/miscdevice.h>
 #include <linux/wait.h>
 #include <linux/mutex.h>
diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c
index 2e541fa02024..a518ec531021 100644
--- a/drivers/isdn/capi/capi.c
+++ b/drivers/isdn/capi/capi.c
@@ -39,7 +39,6 @@
 #include <linux/init.h>
 #include <linux/device.h>
 #include <linux/moduleparam.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/isdn/capiutil.h>
 #include <linux/isdn/capicmd.h>
 #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
@@ -1337,7 +1336,6 @@ static int capinc_tty_init(void)
        drv->owner = THIS_MODULE;
        drv->driver_name = "capi_nc";
-        drv->devfs_name = "capi/";
        drv->name = "capi";
        drv->major = capi_ttymajor;
        drv->minor_start = 0;
@@ -1516,8 +1514,6 @@ static int __init capi_init(void)
        }
        class_device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi");
-        devfs_mk_cdev(MKDEV(capi_major, 0), S_IFCHR | S_IRUSR | S_IWUSR,
-                        "isdn/capi20");
 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
        if (capinc_tty_init() < 0) {
@@ -1552,7 +1548,6 @@ static void __exit capi_exit(void)
        class_device_destroy(capi_class, MKDEV(capi_major, 0));
        class_destroy(capi_class);
        unregister_chrdev(capi_major, "capi20");
-        devfs_remove("isdn/capi20");
 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
        capinc_tty_exit();
diff --git a/drivers/isdn/gigaset/bas-gigaset.c b/drivers/isdn/gigaset/bas-gigaset.c
index 8a45715dd4c1..3845defd4901 100644
--- a/drivers/isdn/gigaset/bas-gigaset.c
+++ b/drivers/isdn/gigaset/bas-gigaset.c
@@ -41,7 +41,6 @@ MODULE_PARM_DESC(cidmode, "Call-ID mode");
 #define GIGASET_MINORS     1
 #define GIGASET_MINOR      16
 #define GIGASET_MODULENAME "bas_gigaset"
-#define GIGASET_DEVFSNAME  "gig/bas/"
 #define GIGASET_DEVNAME    "ttyGB"
 /* length limit according to Siemens 3070usb-protokoll.doc ch. 2.1 */
@@ -2349,8 +2348,7 @@ static int __init bas_gigaset_init(void)
        /* allocate memory for our driver state and intialize it */
        if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
                                       GIGASET_MODULENAME, GIGASET_DEVNAME,
-                                       GIGASET_DEVFSNAME, &gigops,
+                                       &gigops, THIS_MODULE)) == NULL)
-                                       THIS_MODULE)) == NULL)
                goto error;
        /* allocate memory for our device state and intialize it */
diff --git a/drivers/isdn/gigaset/common.c b/drivers/isdn/gigaset/common.c
index 2a56bf33a673..aca165d43aa0 100644
--- a/drivers/isdn/gigaset/common.c
+++ b/drivers/isdn/gigaset/common.c
@@ -1092,14 +1092,12 @@ EXPORT_SYMBOL_GPL(gigaset_freedriver);
 *      minors          Number of minors this driver can handle
 *      procname        Name of the driver
 *      devname         Name of the device files (prefix without minor number)
- *      devfsname       Devfs name of the device files without %d
 * return value:
 *      Pointer to the gigaset_driver structure on success, NULL on failure.
 */
 struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
                                          const char *procname,
                                          const char *devname,
-                                          const char *devfsname,
                                          const struct gigaset_ops *ops,
                                          struct module *owner)
 {
@@ -1139,7 +1137,7 @@ struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
                drv->cs[i].minor_index = i;
        }
-        gigaset_if_initdriver(drv, procname, devname, devfsname);
+        gigaset_if_initdriver(drv, procname, devname);
        spin_lock_irqsave(&driver_lock, flags);
        list_add(&drv->list, &drivers);
diff --git a/drivers/isdn/gigaset/gigaset.h b/drivers/isdn/gigaset/gigaset.h
index 8d63d822104f..1ca3bfdef51d 100644
--- a/drivers/isdn/gigaset/gigaset.h
+++ b/drivers/isdn/gigaset/gigaset.h
@@ -769,7 +769,6 @@ void gigaset_block_channels(struct cardstate *cs);
 struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
                                          const char *procname,
                                          const char *devname,
-                                          const char *devfsname,
                                          const struct gigaset_ops *ops,
                                          struct module *owner);
@@ -892,7 +891,7 @@ int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src,
 /* initialize interface */
 void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
-                           const char *devname, const char *devfsname);
+                           const char *devname);
 /* release interface */
 void gigaset_if_freedriver(struct gigaset_driver *drv);
 /* add minor */
diff --git a/drivers/isdn/gigaset/interface.c b/drivers/isdn/gigaset/interface.c
index 74fd234956c8..bd2e4267528e 100644
--- a/drivers/isdn/gigaset/interface.c
+++ b/drivers/isdn/gigaset/interface.c
@@ -673,10 +673,9 @@ EXPORT_SYMBOL_GPL(gigaset_if_receive);
 *      drv             Driver
 *      procname        Name of the driver (e.g. for /proc/tty/drivers)
 *      devname         Name of the device files (prefix without minor number)
- *      devfsname       Devfs name of the device files without %d
 */
 void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
-                           const char *devname, const char *devfsname)
+                           const char *devname)
 {
        unsigned minors = drv->minors;
        int ret;
@@ -692,7 +691,7 @@ void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
        tty->major =            GIG_MAJOR,
        tty->type =             TTY_DRIVER_TYPE_SERIAL,
        tty->subtype =          SERIAL_TYPE_NORMAL,
-        tty->flags =            TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS,
+        tty->flags =            TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
        tty->driver_name =      procname;
        tty->name =             devname;
@@ -700,7 +699,6 @@ void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
        tty->num =              drv->minors;
        tty->owner =            THIS_MODULE;
-        tty->devfs_name =       devfsname;
        tty->init_termios          = tty_std_termios; //FIXME
        tty->init_termios.c_cflag  = B9600 | CS8 | CREAD | HUPCL | CLOCAL; //FIXME
diff --git a/drivers/isdn/gigaset/usb-gigaset.c b/drivers/isdn/gigaset/usb-gigaset.c
index d86ab68114b0..6e05d9d4a51a 100644
--- a/drivers/isdn/gigaset/usb-gigaset.c
+++ b/drivers/isdn/gigaset/usb-gigaset.c
@@ -41,7 +41,6 @@ MODULE_PARM_DESC(cidmode, "Call-ID mode");
 #define GIGASET_MINORS     1
 #define GIGASET_MINOR      8
 #define GIGASET_MODULENAME "usb_gigaset"
-#define GIGASET_DEVFSNAME  "gig/usb/"
 #define GIGASET_DEVNAME    "ttyGU"
 #define IF_WRITEBUF 2000 //FIXME  // WAKEUP_CHARS: 256
@@ -896,8 +895,7 @@ static int __init usb_gigaset_init(void)
        /* allocate memory for our driver state and intialize it */
        if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
                                       GIGASET_MODULENAME, GIGASET_DEVNAME,
-                                       GIGASET_DEVFSNAME, &ops,
+                                       &ops, THIS_MODULE)) == NULL)
-                                       THIS_MODULE)) == NULL)
                goto error;
        /* allocate memory for our device state and intialize it */
diff --git a/drivers/isdn/hardware/eicon/divamnt.c b/drivers/isdn/hardware/eicon/divamnt.c
index 6146f7633be5..b163c5909182 100644
--- a/drivers/isdn/hardware/eicon/divamnt.c
+++ b/drivers/isdn/hardware/eicon/divamnt.c
@@ -17,7 +17,6 @@
 #include <linux/sched.h>
 #include <linux/smp_lock.h>
 #include <linux/poll.h>
-#include <linux/devfs_fs_kernel.h>
 #include <asm/uaccess.h>
 #include "platform.h"
@@ -178,7 +177,6 @@ static struct file_operations divas_maint_fops = {
 static void divas_maint_unregister_chrdev(void)
 {
-        devfs_remove(DEVNAME);
        unregister_chrdev(major, DEVNAME);
 }
@@ -190,7 +188,6 @@ static int DIVA_INIT_FUNCTION divas_maint_register_chrdev(void)
                       DRIVERLNAME);
                return (0);
        }
-        devfs_mk_cdev(MKDEV(major, 0), S_IFCHR|S_IRUSR|S_IWUSR, DEVNAME);
        return (1);
 }
diff --git a/drivers/isdn/hardware/eicon/divasi.c b/drivers/isdn/hardware/eicon/divasi.c
index df715b47e2b4..6e7d89a31c1d 100644
--- a/drivers/isdn/hardware/eicon/divasi.c
+++ b/drivers/isdn/hardware/eicon/divasi.c
@@ -19,7 +19,6 @@
 #include <linux/poll.h>
 #include <linux/proc_fs.h>
 #include <linux/skbuff.h>
-#include <linux/devfs_fs_kernel.h>
 #include <asm/uaccess.h>
 #include "platform.h"
@@ -145,7 +144,6 @@ static struct file_operations divas_idi_fops = {
 static void divas_idi_unregister_chrdev(void)
 {
-        devfs_remove(DEVNAME);
        unregister_chrdev(major, DEVNAME);
 }
@@ -157,7 +155,6 @@ static int DIVA_INIT_FUNCTION divas_idi_register_chrdev(void)
                       DRIVERLNAME);
                return (0);
        }
-        devfs_mk_cdev(MKDEV(major, 0), S_IFCHR|S_IRUSR|S_IWUSR, DEVNAME);
        return (1);
 }
diff --git a/drivers/isdn/hardware/eicon/divasmain.c b/drivers/isdn/hardware/eicon/divasmain.c
index c9b26e86d183..9dee6a39104c 100644
--- a/drivers/isdn/hardware/eicon/divasmain.c
+++ b/drivers/isdn/hardware/eicon/divasmain.c
@@ -14,7 +14,6 @@
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
-#include <linux/devfs_fs_kernel.h>
 #include <asm/uaccess.h>
 #include <asm/io.h>
 #include <linux/ioport.h>
@@ -678,7 +677,6 @@ static struct file_operations divas_fops = {
 static void divas_unregister_chrdev(void)
 {
-        devfs_remove(DEVNAME);
        unregister_chrdev(major, DEVNAME);
 }
@@ -690,7 +688,6 @@ static int DIVA_INIT_FUNCTION divas_register_chrdev(void)
                       DRIVERLNAME);
                return (0);
        }
-        devfs_mk_cdev(MKDEV(major, 0), S_IFCHR|S_IRUSR|S_IWUSR, DEVNAME);
        return (1);
 }
diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c
index 433389daedb2..0a53a990c100 100644
--- a/drivers/isdn/i4l/isdn_tty.c
+++ b/drivers/isdn/i4l/isdn_tty.c
@@ -1890,14 +1890,13 @@ isdn_tty_modem_init(void)
        if (!m->tty_modem)
                return -ENOMEM;
        m->tty_modem->name = "ttyI";
-        m->tty_modem->devfs_name = "isdn/ttyI";
        m->tty_modem->major = ISDN_TTY_MAJOR;
        m->tty_modem->minor_start = 0;
        m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL;
        m->tty_modem->subtype = SERIAL_TYPE_NORMAL;
        m->tty_modem->init_termios = tty_std_termios;
        m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
-        m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
+        m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
        m->tty_modem->driver_name = "isdn_tty";
        tty_set_operations(m->tty_modem, &modem_ops);
        retval = tty_register_driver(m->tty_modem);
diff --git a/drivers/macintosh/adb.c b/drivers/macintosh/adb.c
index 259fd8973ce9..9f1a049dc226 100644
--- a/drivers/macintosh/adb.c
+++ b/drivers/macintosh/adb.c
@@ -36,7 +36,6 @@
 #include <linux/spinlock.h>
 #include <linux/completion.h>
 #include <linux/device.h>
-#include <linux/devfs_fs_kernel.h>
 #include <asm/uaccess.h>
 #include <asm/semaphore.h>
@@ -904,8 +903,6 @@ adbdev_init(void)
                return;
        }
-        devfs_mk_cdev(MKDEV(ADB_MAJOR, 0), S_IFCHR | S_IRUSR | S_IWUSR, "adb");
        adb_dev_class = class_create(THIS_MODULE, "adb");
        if (IS_ERR(adb_dev_class))
                return;
diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index 3edb3477f987..d13bb15a8a02 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -13,7 +13,6 @@
 #include <linux/init.h>
 #include <linux/wait.h>
 #include <linux/slab.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/dm-ioctl.h>
 #include <linux/hdreg.h>
@@ -68,14 +67,12 @@ static int dm_hash_init(void)
 {
        init_buckets(_name_buckets);
        init_buckets(_uuid_buckets);
-        devfs_mk_dir(DM_DIR);
        return 0;
 }
 static void dm_hash_exit(void)
 {
        dm_hash_remove_all(0);
-        devfs_remove(DM_DIR);
 }
 /*-----------------------------------------------------------------
@@ -172,25 +169,6 @@ static void free_cell(struct hash_cell *hc)
 }
 /*
- * devfs stuff.
- */
-static int register_with_devfs(struct hash_cell *hc)
-{
-        struct gendisk *disk = dm_disk(hc->md);
-        devfs_mk_bdev(MKDEV(disk->major, disk->first_minor),
-                      S_IFBLK | S_IRUSR | S_IWUSR | S_IRGRP,
-                      DM_DIR "/%s", hc->name);
-        return 0;
-}
-static int unregister_with_devfs(struct hash_cell *hc)
-{
-        devfs_remove(DM_DIR"/%s", hc->name);
-        return 0;
-}
-/*
 * The kdev_t and uuid of a device can never change once it is
 * initially inserted.
 */
@@ -226,7 +204,6 @@ static int dm_hash_insert(const char *name, const char *uuid, struct mapped_devi
                }
                list_add(&cell->uuid_list, _uuid_buckets + hash_str(uuid));
        }
-        register_with_devfs(cell);
        dm_get(md);
        dm_set_mdptr(md, cell);
        up_write(&_hash_lock);
@@ -246,7 +223,6 @@ static void __hash_remove(struct hash_cell *hc)
        /* remove from the dev hash */
        list_del(&hc->uuid_list);
        list_del(&hc->name_list);
-        unregister_with_devfs(hc);
        dm_set_mdptr(hc->md, NULL);
        table = dm_get_table(hc->md);
@@ -342,16 +318,11 @@ static int dm_hash_rename(const char *old, const char *new)
        /*
         * rename and move the name cell.
         */
-        unregister_with_devfs(hc);
        list_del(&hc->name_list);
        old_name = hc->name;
        hc->name = new_name;
        list_add(&hc->name_list, _name_buckets + hash_str(new_name));
-        /* rename the device node in devfs */
-        register_with_devfs(hc);
        /*
         * Wake up any dm event waiters.
         */
@@ -1501,7 +1472,6 @@ static struct file_operations _ctl_fops = {
 static struct miscdevice _dm_misc = {
        .minor          = MISC_DYNAMIC_MINOR,
        .name           = DM_NAME,
-        .devfs_name     = "mapper/control",
        .fops           = &_ctl_fops
 };
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 3ed2e53b9eb6..c99bf9f01759 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -167,7 +167,7 @@ static void local_exit(void)
        bioset_free(dm_set);
        if (unregister_blkdev(_major, _name) < 0)
-                DMERR("devfs_unregister_blkdev failed");
+                DMERR("unregister_blkdev failed");
        _major = 0;
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 306268ec99ff..2ec1b3520a0b 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -39,7 +39,6 @@
 #include <linux/raid/md.h>
 #include <linux/raid/bitmap.h>
 #include <linux/sysctl.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/buffer_head.h> /* for invalidate_bdev */
 #include <linux/suspend.h>
 #include <linux/poll.h>
@@ -2911,13 +2910,10 @@ static struct kobject *md_probe(dev_t dev, int *part, void *data)
        }
        disk->major = MAJOR(dev);
        disk->first_minor = unit << shift;
-        if (partitioned) {
+        if (partitioned)
                sprintf(disk->disk_name, "md_d%d", unit);
-                sprintf(disk->devfs_name, "md/d%d", unit);
+        else
-        } else {
                sprintf(disk->disk_name, "md%d", unit);
-                sprintf(disk->devfs_name, "md/%d", unit);
-        }
        disk->fops = &md_fops;
        disk->private_data = mddev;
        disk->queue = mddev->queue;
@@ -5538,8 +5534,6 @@ static void md_geninit(void)
 static int __init md_init(void)
 {
-        int minor;
        printk(KERN_INFO "md: md driver %d.%d.%d MAX_MD_DEVS=%d,"
                        " MD_SB_DISKS=%d\n",
                        MD_MAJOR_VERSION, MD_MINOR_VERSION,
@@ -5553,23 +5547,11 @@ static int __init md_init(void)
                unregister_blkdev(MAJOR_NR, "md");
                return -1;
        }
-        devfs_mk_dir("md");
        blk_register_region(MKDEV(MAJOR_NR, 0), MAX_MD_DEVS, THIS_MODULE,
                                md_probe, NULL, NULL);
        blk_register_region(MKDEV(mdp_major, 0), MAX_MD_DEVS<<MdpMinorShift, THIS_MODULE,
                            md_probe, NULL, NULL);
-        for (minor=0; minor < MAX_MD_DEVS; ++minor)
-                devfs_mk_bdev(MKDEV(MAJOR_NR, minor),
-                                S_IFBLK|S_IRUSR|S_IWUSR,
-                                "md/%d", minor);
-        for (minor=0; minor < MAX_MD_DEVS; ++minor)
-                devfs_mk_bdev(MKDEV(mdp_major, minor<<MdpMinorShift),
-                              S_IFBLK|S_IRUSR|S_IWUSR,
-                              "md/mdp%d", minor);
        register_reboot_notifier(&md_notifier);
        raid_table_header = register_sysctl_table(raid_root_table, 1);
@@ -5625,15 +5607,9 @@ static __exit void md_exit(void)
 {
        mddev_t *mddev;
        struct list_head *tmp;
-        int i;
        blk_unregister_region(MKDEV(MAJOR_NR,0), MAX_MD_DEVS);
        blk_unregister_region(MKDEV(mdp_major,0), MAX_MD_DEVS << MdpMinorShift);
-        for (i=0; i < MAX_MD_DEVS; i++)
-                devfs_remove("md/%d", i);
-        for (i=0; i < MAX_MD_DEVS; i++)
-                devfs_remove("md/d%d", i);
-        devfs_remove("md");
        unregister_blkdev(MAJOR_NR,"md");
        unregister_blkdev(mdp_major, "mdp");
diff --git a/drivers/media/dvb/dvb-core/dvbdev.c b/drivers/media/dvb/dvb-core/dvbdev.c
index 134c2bbbeeb5..40774feb8953 100644
--- a/drivers/media/dvb/dvb-core/dvbdev.c
+++ b/drivers/media/dvb/dvb-core/dvbdev.c
@@ -231,10 +231,6 @@ int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev,
        mutex_unlock(&dvbdev_register_lock);
-        devfs_mk_cdev(MKDEV(DVB_MAJOR, nums2minor(adap->num, type, id)),
-                        S_IFCHR | S_IRUSR | S_IWUSR,
-                        "dvb/adapter%d/%s%d", adap->num, dnames[type], id);
        class_device_create(dvb_class, NULL, MKDEV(DVB_MAJOR, nums2minor(adap->num, type, id)),
                            adap->device, "dvb%d.%s%d", adap->num, dnames[type], id);
@@ -252,9 +248,6 @@ void dvb_unregister_device(struct dvb_device *dvbdev)
        if (!dvbdev)
                return;
-        devfs_remove("dvb/adapter%d/%s%d", dvbdev->adapter->num,
-                        dnames[dvbdev->type], dvbdev->id);
        class_device_destroy(dvb_class, MKDEV(DVB_MAJOR, nums2minor(dvbdev->adapter->num,
                                        dvbdev->type, dvbdev->id)));
@@ -302,7 +295,6 @@ int dvb_register_adapter(struct dvb_adapter *adap, const char *name, struct modu
        printk ("DVB: registering new adapter (%s).\n", name);
-        devfs_mk_dir("dvb/adapter%d", num);
        adap->num = num;
        adap->name = name;
        adap->module = module;
@@ -319,8 +311,6 @@ EXPORT_SYMBOL(dvb_register_adapter);
 int dvb_unregister_adapter(struct dvb_adapter *adap)
 {
-        devfs_remove("dvb/adapter%d", adap->num);
        if (mutex_lock_interruptible(&dvbdev_register_lock))
                return -ERESTARTSYS;
        list_del (&adap->list_head);
@@ -410,8 +400,6 @@ static int __init init_dvbdev(void)
                goto error;
        }
-        devfs_mk_dir("dvb");
        dvb_class = class_create(THIS_MODULE, "dvb");
        if (IS_ERR(dvb_class)) {
                retval = PTR_ERR(dvb_class);
@@ -428,7 +416,6 @@ error:
 static void __exit exit_dvbdev(void)
 {
-        devfs_remove("dvb");
        class_destroy(dvb_class);
        cdev_del(&dvb_device_cdev);
        unregister_chrdev_region(MKDEV(DVB_MAJOR, 0), MAX_DVB_MINORS);
diff --git a/drivers/media/dvb/dvb-core/dvbdev.h b/drivers/media/dvb/dvb-core/dvbdev.h
index d7a976d040d7..7a7f75fd168c 100644
--- a/drivers/media/dvb/dvb-core/dvbdev.h
+++ b/drivers/media/dvb/dvb-core/dvbdev.h
@@ -27,7 +27,6 @@
 #include <linux/poll.h>
 #include <linux/fs.h>
 #include <linux/list.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/smp_lock.h>
 #define DVB_MAJOR 212
diff --git a/drivers/media/dvb/ttpci/av7110.h b/drivers/media/dvb/ttpci/av7110.h
index 3e2e12124bae..9c79696da08a 100644
--- a/drivers/media/dvb/ttpci/av7110.h
+++ b/drivers/media/dvb/ttpci/av7110.h
@@ -6,10 +6,6 @@
 #include <linux/netdevice.h>
 #include <linux/i2c.h>
-#ifdef CONFIG_DEVFS_FS
-#include <linux/devfs_fs_kernel.h>
-#endif
 #include <linux/dvb/video.h>
 #include <linux/dvb/audio.h>
 #include <linux/dvb/dmx.h>
diff --git a/drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c b/drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c
index 14559ef6153c..336b2fe1a5f2 100644
--- a/drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c
+++ b/drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c
@@ -126,10 +126,6 @@ struct ttusb {
        int revision;
-#if 0
-        devfs_handle_t stc_devfs_handle;
-#endif
        struct dvb_frontend* fe;
 };
@@ -1746,13 +1742,6 @@ static int ttusb_probe(struct usb_interface *intf, const struct usb_device_id *i
                return -ENODEV;
        }
-#if 0
-        ttusb->stc_devfs_handle =
-            devfs_register(ttusb->adapter->devfs_handle, TTUSB_BUDGET_NAME,
-                           DEVFS_FL_DEFAULT, 0, 192,
-                           S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP
-                           | S_IROTH | S_IWOTH, &stc_fops, ttusb);
-#endif
        usb_set_intfdata(intf, (void *) ttusb);
        frontend_init(ttusb);
diff --git a/drivers/media/radio/miropcm20-rds.c b/drivers/media/radio/miropcm20-rds.c
index 87b37b7691da..c1b1db65e668 100644
--- a/drivers/media/radio/miropcm20-rds.c
+++ b/drivers/media/radio/miropcm20-rds.c
@@ -115,7 +115,6 @@ static struct file_operations rds_fops = {
 static struct miscdevice rds_miscdev = {
        .minor          = MISC_DYNAMIC_MINOR,
        .name           = "radiotext",
-        .devfs_name     = "v4l/rds/radiotext",
        .fops           = &rds_fops,
 };
diff --git a/drivers/media/video/arv.c b/drivers/media/video/arv.c
index 6e08e32346eb..ae14f5f32039 100644
--- a/drivers/media/video/arv.c
+++ b/drivers/media/video/arv.c
@@ -20,7 +20,6 @@
 #include <linux/config.h>
 #include <linux/init.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/module.h>
 #include <linux/delay.h>
 #include <linux/errno.h>
diff --git a/drivers/media/video/videodev.c b/drivers/media/video/videodev.c
index 2dfa7f23d0ca..b26ebaff226f 100644
--- a/drivers/media/video/videodev.c
+++ b/drivers/media/video/videodev.c
@@ -37,7 +37,6 @@
 #include <linux/init.h>
 #include <linux/kmod.h>
 #include <linux/slab.h>
-#include <linux/devfs_fs_kernel.h>
 #include <asm/uaccess.h>
 #include <asm/system.h>
@@ -1563,10 +1562,6 @@ int video_register_device(struct video_device *vfd, int type, int nr)
        video_device[i]=vfd;
        vfd->minor=i;
        mutex_unlock(&videodev_lock);
-        sprintf(vfd->devfs_name, "v4l/%s%d", name_base, i - base);
-        devfs_mk_cdev(MKDEV(VIDEO_MAJOR, vfd->minor),
-                        S_IFCHR | S_IRUSR | S_IWUSR, vfd->devfs_name);
        mutex_init(&vfd->lock);
        /* sysfs class */
@@ -1575,7 +1570,7 @@ int video_register_device(struct video_device *vfd, int type, int nr)
                vfd->class_dev.dev = vfd->dev;
        vfd->class_dev.class       = &video_class;
        vfd->class_dev.devt        = MKDEV(VIDEO_MAJOR, vfd->minor);
-        strlcpy(vfd->class_dev.class_id, vfd->devfs_name + 4, BUS_ID_SIZE);
+        sprintf(vfd->class_dev.class_id, "%s%d", name_base, i - base);
        class_device_register(&vfd->class_dev);
        class_device_create_file(&vfd->class_dev,
                                &class_device_attr_name);
@@ -1604,7 +1599,6 @@ void video_unregister_device(struct video_device *vfd)
        if(video_device[vfd->minor]!=vfd)
                panic("videodev: bad unregister");
-        devfs_remove(vfd->devfs_name);
        video_device[vfd->minor]=NULL;
        class_device_unregister(&vfd->class_dev);
        mutex_unlock(&videodev_lock);
diff --git a/drivers/message/i2o/i2o_block.c b/drivers/message/i2o/i2o_block.c
index 7d4c5497785b..1ddc2fb429d5 100644
--- a/drivers/message/i2o/i2o_block.c
+++ b/drivers/message/i2o/i2o_block.c
@@ -1089,7 +1089,6 @@ static int i2o_block_probe(struct device *dev)
        gd = i2o_blk_dev->gd;
        gd->first_minor = unit << 4;
        sprintf(gd->disk_name, "i2o/hd%c", 'a' + unit);
-        sprintf(gd->devfs_name, "i2o/hd%c", 'a' + unit);
        gd->driverfs_dev = &i2o_dev->device;
        /* setup request queue */
diff --git a/drivers/mmc/mmc_block.c b/drivers/mmc/mmc_block.c
index 587458b370b9..115cc21094b9 100644
--- a/drivers/mmc/mmc_block.c
+++ b/drivers/mmc/mmc_block.c
@@ -27,7 +27,6 @@
 #include <linux/hdreg.h>
 #include <linux/kdev_t.h>
 #include <linux/blkdev.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/mutex.h>
 #include <linux/mmc/card.h>
@@ -409,7 +408,6 @@ static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
         */
        sprintf(md->disk->disk_name, "mmcblk%d", devidx);
-        sprintf(md->disk->devfs_name, "mmc/blk%d", devidx);
        blk_queue_hardsect_size(md->queue.queue, 1 << md->block_bits);
@@ -555,7 +553,6 @@ static int __init mmc_blk_init(void)
        if (major == 0)
                major = res;
-        devfs_mk_dir("mmc");
        return mmc_register_driver(&mmc_driver);
 out:
@@ -565,7 +562,6 @@ static int __init mmc_blk_init(void)
 static void __exit mmc_blk_exit(void)
 {
        mmc_unregister_driver(&mmc_driver);
-        devfs_remove("mmc");
        unregister_blkdev(major, "mmc");
 }
diff --git a/drivers/net/ppp_generic.c b/drivers/net/ppp_generic.c
index d643a097faa5..425ff5b117f1 100644
--- a/drivers/net/ppp_generic.c
+++ b/drivers/net/ppp_generic.c
@@ -28,7 +28,6 @@
 #include <linux/kmod.h>
 #include <linux/init.h>
 #include <linux/list.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/netdevice.h>
 #include <linux/poll.h>
 #include <linux/ppp_defs.h>
@@ -863,10 +862,6 @@ static int __init ppp_init(void)
                        goto out_chrdev;
                }
                class_device_create(ppp_class, NULL, MKDEV(PPP_MAJOR, 0), NULL, "ppp");
-                err = devfs_mk_cdev(MKDEV(PPP_MAJOR, 0),
-                                S_IFCHR|S_IRUSR|S_IWUSR, "ppp");
-                if (err)
-                        goto out_class;
        }
 out:
@@ -874,9 +869,6 @@ out:
                printk(KERN_ERR "failed to register PPP device (%d)\n", err);
        return err;
-out_class:
-        class_device_destroy(ppp_class, MKDEV(PPP_MAJOR,0));
-        class_destroy(ppp_class);
 out_chrdev:
        unregister_chrdev(PPP_MAJOR, "ppp");
        goto out;
@@ -2681,7 +2673,6 @@ static void __exit ppp_cleanup(void)
        cardmap_destroy(&all_ppp_units);
        if (unregister_chrdev(PPP_MAJOR, "ppp") != 0)
                printk(KERN_ERR "PPP: failed to unregister PPP device\n");
-        devfs_remove("ppp");
        class_device_destroy(ppp_class, MKDEV(PPP_MAJOR, 0));
        class_destroy(ppp_class);
 }
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 6c62d5c88268..732c5edec2e5 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -780,7 +780,6 @@ static struct miscdevice tun_miscdev = {
        .minor = TUN_MINOR,
        .name = "tun",
        .fops = &tun_fops,
-        .devfs_name = "net/tun",
 };
 /* ethtool interface */
diff --git a/drivers/net/wan/cosa.c b/drivers/net/wan/cosa.c
index e392ee8b37a1..be5e33814cb1 100644
--- a/drivers/net/wan/cosa.c
+++ b/drivers/net/wan/cosa.c
@@ -85,7 +85,6 @@
 #include <linux/slab.h>
 #include <linux/poll.h>
 #include <linux/fs.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
 #include <linux/errno.h>
@@ -393,7 +392,6 @@ static int __init cosa_init(void)
                err = -ENODEV;
                goto out;
        }
-        devfs_mk_dir("cosa");
        cosa_class = class_create(THIS_MODULE, "cosa");
        if (IS_ERR(cosa_class)) {
                err = PTR_ERR(cosa_class);
@@ -402,13 +400,6 @@ static int __init cosa_init(void)
        for (i=0; i<nr_cards; i++) {
                class_device_create(cosa_class, NULL, MKDEV(cosa_major, i),
                                NULL, "cosa%d", i);
-                err = devfs_mk_cdev(MKDEV(cosa_major, i),
-                                S_IFCHR|S_IRUSR|S_IWUSR,
-                                "cosa/%d", i);
-                if (err) {
-                        class_device_destroy(cosa_class, MKDEV(cosa_major, i));
-                        goto out_chrdev;                
-                }
        }
        err = 0;
        goto out;
@@ -426,12 +417,9 @@ static void __exit cosa_exit(void)
        int i;
        printk(KERN_INFO "Unloading the cosa module\n");
-        for (i=0; i<nr_cards; i++) {
+        for (i=0; i<nr_cards; i++)
                class_device_destroy(cosa_class, MKDEV(cosa_major, i));
-                devfs_remove("cosa/%d", i);
-        }
        class_destroy(cosa_class);
-        devfs_remove("cosa");
        for (cosa=cosa_cards; nr_cards--; cosa++) {
                /* Clean up the per-channel data */
                for (i=0; i<cosa->nchannels; i++) {
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index bafcd2f20ae2..2dc179b14ce6 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -1834,7 +1834,6 @@ dasd_exit(void)
        }
        dasd_gendisk_exit();
        dasd_devmap_exit();
-        devfs_remove("dasd");
        if (dasd_debug_area != NULL) {
                debug_unregister(dasd_debug_area);
                dasd_debug_area = NULL;
@@ -2107,9 +2106,6 @@ dasd_init(void)
        dasd_diag_discipline_pointer = NULL;
-        rc = devfs_mk_dir("dasd");
-        if (rc)
-                goto failed;
        rc = dasd_devmap_init();
        if (rc)
                goto failed;
diff --git a/drivers/s390/block/dasd_genhd.c b/drivers/s390/block/dasd_genhd.c
index fce2835e7d19..61ffde718a7a 100644
--- a/drivers/s390/block/dasd_genhd.c
+++ b/drivers/s390/block/dasd_genhd.c
@@ -68,8 +68,6 @@ dasd_gendisk_alloc(struct dasd_device *device)
        }
        len += sprintf(gdp->disk_name + len, "%c", 'a'+(device->devindex%26));
-        sprintf(gdp->devfs_name, "dasd/%s", device->cdev->dev.bus_id);
        if (device->features & DASD_FEATURE_READONLY)
                set_disk_ro(gdp, 1);
        gdp->private_data = device;
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index 03a83efc34c4..3ccf06d28ba1 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -54,7 +54,6 @@
 #include <linux/module.h>
 #include <linux/wait.h>
 #include <linux/blkdev.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/genhd.h>
 #include <linux/hdreg.h>
 #include <linux/interrupt.h>
diff --git a/drivers/s390/block/xpram.c b/drivers/s390/block/xpram.c
index 54ecd548c318..4c1e56b9b98d 100644
--- a/drivers/s390/block/xpram.c
+++ b/drivers/s390/block/xpram.c
@@ -36,7 +36,6 @@
 #include <linux/hdreg.h>  /* HDIO_GETGEO */
 #include <linux/sysdev.h>
 #include <linux/bio.h>
-#include <linux/devfs_fs_kernel.h>
 #include <asm/uaccess.h>
 #define XPRAM_NAME      "xpram"
@@ -439,8 +438,6 @@ static int __init xpram_setup_blkdev(void)
        if (rc < 0)
                goto out;
-        devfs_mk_dir("slram");
        /*
         * Assign the other needed values: make request function, sizes and
         * hardsect size. All the minor devices feature the same value.
@@ -469,14 +466,12 @@ static int __init xpram_setup_blkdev(void)
                disk->private_data = &xpram_devices[i];
                disk->queue = xpram_queue;
                sprintf(disk->disk_name, "slram%d", i);
-                sprintf(disk->devfs_name, "slram/%d", i);
                set_capacity(disk, xpram_sizes[i] << 1);
                add_disk(disk);
        }
        return 0;
 out_unreg:
-        devfs_remove("slram");
        unregister_blkdev(XPRAM_MAJOR, XPRAM_NAME);
 out:
        while (i--)
@@ -495,7 +490,6 @@ static void __exit xpram_exit(void)
                put_disk(xpram_disks[i]);
        }
        unregister_blkdev(XPRAM_MAJOR, XPRAM_NAME);
-        devfs_remove("slram");
        blk_cleanup_queue(xpram_queue);
        sysdev_unregister(&xpram_sys_device);
        sysdev_class_unregister(&xpram_sysclass);
diff --git a/drivers/s390/char/monreader.c b/drivers/s390/char/monreader.c
index fb7bc9e5eebc..a138b1510093 100644
--- a/drivers/s390/char/monreader.c
+++ b/drivers/s390/char/monreader.c
@@ -586,7 +586,6 @@ static struct file_operations mon_fops = {
 static struct miscdevice mon_dev = {
        .name       = "monreader",
-        .devfs_name = "monreader",
        .fops       = &mon_fops,
        .minor      = MISC_DYNAMIC_MINOR,
 };
diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c
index 9a141776873f..7d26a3e4cb80 100644
--- a/drivers/s390/char/tty3270.c
+++ b/drivers/s390/char/tty3270.c
@@ -1785,7 +1785,6 @@ tty3270_init(void)
         * proc_entry, set_termios, flush_buffer, set_ldisc, write_proc
         */
        driver->owner = THIS_MODULE;
-        driver->devfs_name = "ttyTUB/";
        driver->driver_name = "ttyTUB";
        driver->name = "ttyTUB";
        driver->major = IBM_TTY3270_MAJOR;
@@ -1793,7 +1792,7 @@ tty3270_init(void)
        driver->type = TTY_DRIVER_TYPE_SYSTEM;
        driver->subtype = SYSTEM_TYPE_TTY;
        driver->init_termios = tty_std_termios;
-        driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_NO_DEVFS;
+        driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_DYNAMIC_DEV;
        tty_set_operations(driver, &tty3270_ops);
        ret = tty_register_driver(driver);
        if (ret) {
diff --git a/drivers/s390/crypto/z90main.c b/drivers/s390/crypto/z90main.c
index 982acc7303ea..b2f20ab8431a 100644
--- a/drivers/s390/crypto/z90main.c
+++ b/drivers/s390/crypto/z90main.c
@@ -411,7 +411,6 @@ static struct miscdevice z90crypt_misc_device = {
        .minor      = Z90CRYPT_MINOR,
        .name       = DEV_NAME,
        .fops       = &z90crypt_fops,
-        .devfs_name = DEV_NAME
 };
 /**
diff --git a/drivers/sbus/char/bpp.c b/drivers/sbus/char/bpp.c
index ccb20a6f5f36..385f4f768311 100644
--- a/drivers/sbus/char/bpp.c
+++ b/drivers/sbus/char/bpp.c
@@ -20,7 +20,6 @@
 #include <linux/timer.h>
 #include <linux/ioport.h>
 #include <linux/major.h>
-#include <linux/devfs_fs_kernel.h>
 #include <asm/uaccess.h>
 #include <asm/io.h>
@@ -1031,11 +1030,6 @@ static int __init bpp_init(void)
                instances[idx].opened = 0;
                probeLptPort(idx);
        }
-        devfs_mk_dir("bpp");
-        for (idx = 0; idx < BPP_NO; idx++) {
-                devfs_mk_cdev(MKDEV(BPP_MAJOR, idx),
-                                S_IFCHR | S_IRUSR | S_IWUSR, "bpp/%d", idx);
-        }
        return 0;
 }
@@ -1044,9 +1038,6 @@ static void __exit bpp_cleanup(void)
 {
        unsigned idx;
-        for (idx = 0; idx < BPP_NO; idx++)
-                devfs_remove("bpp/%d", idx);
-        devfs_remove("bpp");
        unregister_chrdev(BPP_MAJOR, dev_name);
        for (idx = 0;  idx < BPP_NO; idx++) {
diff --git a/drivers/sbus/char/vfc.h b/drivers/sbus/char/vfc.h
index 8045cd5e7cb3..63941a259b92 100644
--- a/drivers/sbus/char/vfc.h
+++ b/drivers/sbus/char/vfc.h
@@ -1,8 +1,6 @@
 #ifndef _LINUX_VFC_H_
 #define _LINUX_VFC_H_
-#include <linux/devfs_fs_kernel.h>
 /*
 * The control register for the vfc is at offset 0x4000
 * The first field ram bank is located at offset 0x5000
diff --git a/drivers/sbus/char/vfc_dev.c b/drivers/sbus/char/vfc_dev.c
index ddcd330b9e89..55b2b31bd7ab 100644
--- a/drivers/sbus/char/vfc_dev.c
+++ b/drivers/sbus/char/vfc_dev.c
@@ -164,10 +164,6 @@ int init_vfc_device(struct sbus_dev *sdev,struct vfc_dev *dev, int instance)
                return -EINVAL;
        if (init_vfc_hw(dev))
                return -EIO;
-        devfs_mk_cdev(MKDEV(VFC_MAJOR, instance),
-                        S_IFCHR | S_IRUSR | S_IWUSR,
-                        "vfc/%d", instance);
        return 0;
 }
@@ -677,7 +673,6 @@ static int vfc_probe(void)
                kfree(vfc_dev_lst);
                return -EIO;
        }
-        devfs_mk_dir("vfc");
        instance = 0;
        for_all_sbusdev(sdev, sbus) {
                if (strcmp(sdev->prom_name, "vfc") == 0) {
@@ -717,7 +712,6 @@ static void deinit_vfc_device(struct vfc_dev *dev)
 {
        if(dev == NULL)
                return;
-        devfs_remove("vfc/%d", dev->instance);
        sbus_iounmap(dev->regs, sizeof(struct vfc_regs));
        kfree(dev);
 }
@@ -731,7 +725,6 @@ void cleanup_module(void)
        for (devp = vfc_dev_lst; *devp; devp++)
                deinit_vfc_device(*devp);
-        devfs_remove("vfc");
        kfree(vfc_dev_lst);
        return;
 }
diff --git a/drivers/serial/21285.c b/drivers/serial/21285.c
index 7572665a8855..9fd0de4b7afd 100644
--- a/drivers/serial/21285.c
+++ b/drivers/serial/21285.c
@@ -479,7 +479,6 @@ static struct uart_driver serial21285_reg = {
        .owner                  = THIS_MODULE,
        .driver_name            = "ttyFB",
        .dev_name               = "ttyFB",
-        .devfs_name             = "ttyFB",
        .major                  = SERIAL_21285_MAJOR,
        .minor                  = SERIAL_21285_MINOR,
        .nr                     = 1,
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index bbf78aaf9e01..f361b356bd1d 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -2354,7 +2354,6 @@ int __init serial8250_start_console(struct uart_port *port, char *options)
 static struct uart_driver serial8250_reg = {
        .owner                  = THIS_MODULE,
        .driver_name            = "serial",
-        .devfs_name             = "tts/",
        .dev_name               = "ttyS",
        .major                  = TTY_MAJOR,
        .minor                  = 64,
diff --git a/drivers/serial/at91_serial.c b/drivers/serial/at91_serial.c
index db5b25fafed4..df9500bdaded 100644
--- a/drivers/serial/at91_serial.c
+++ b/drivers/serial/at91_serial.c
@@ -863,7 +863,6 @@ static struct uart_driver at91_uart = {
        .owner                  = THIS_MODULE,
        .driver_name            = "at91_serial",
        .dev_name               = AT91_DEVICENAME,
-        .devfs_name             = AT91_DEVICENAME,
        .major                  = SERIAL_AT91_MAJOR,
        .minor                  = MINOR_START,
        .nr                     = AT91_NR_UART,
diff --git a/drivers/serial/crisv10.c b/drivers/serial/crisv10.c
index 5cacc5e74a92..b84137cdeb2b 100644
--- a/drivers/serial/crisv10.c
+++ b/drivers/serial/crisv10.c
@@ -4878,7 +4878,7 @@ rs_init(void)
        driver->init_termios = tty_std_termios;
        driver->init_termios.c_cflag =
                B115200 | CS8 | CREAD | HUPCL | CLOCAL; /* is normally B9600 default... */
-        driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
+        driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
        driver->termios = serial_termios;
        driver->termios_locked = serial_termios_locked;
diff --git a/drivers/serial/dz.c b/drivers/serial/dz.c
index bf71bad5c34f..466d06cc7d37 100644
--- a/drivers/serial/dz.c
+++ b/drivers/serial/dz.c
@@ -768,11 +768,7 @@ void __init dz_serial_console_init(void)
 static struct uart_driver dz_reg = {
        .owner                  = THIS_MODULE,
        .driver_name            = "serial",
-#ifdef CONFIG_DEVFS
-        .dev_name               = "tts/%d",
-#else
        .dev_name               = "ttyS%d",
-#endif
        .major                  = TTY_MAJOR,
        .minor                  = 64,
        .nr                     = DZ_NB_PORT,
diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c
index d202eb4f3848..da85bafa0942 100644
--- a/drivers/serial/imx.c
+++ b/drivers/serial/imx.c
@@ -888,7 +888,6 @@ static struct uart_driver imx_reg = {
        .owner          = THIS_MODULE,
        .driver_name    = DRIVER_NAME,
        .dev_name       = "ttySMX",
-        .devfs_name     = "ttsmx/",
        .major          = SERIAL_IMX_MAJOR,
        .minor          = MINOR_START,
        .nr             = ARRAY_SIZE(imx_ports),
diff --git a/drivers/serial/ip22zilog.c b/drivers/serial/ip22zilog.c
index 651772474ac1..56b093ecd779 100644
--- a/drivers/serial/ip22zilog.c
+++ b/drivers/serial/ip22zilog.c
@@ -1085,7 +1085,6 @@ static struct console ip22zilog_console = {
 static struct uart_driver ip22zilog_reg = {
        .owner          = THIS_MODULE,
        .driver_name    = "serial",
-        .devfs_name     = "tts/",
        .dev_name       = "ttyS",
        .major          = TTY_MAJOR,
        .minor          = 64,
diff --git a/drivers/serial/m32r_sio.c b/drivers/serial/m32r_sio.c
index 321a40f33b50..6a2a25d9b596 100644
--- a/drivers/serial/m32r_sio.c
+++ b/drivers/serial/m32r_sio.c
@@ -1131,7 +1131,6 @@ console_initcall(m32r_sio_console_init);
 static struct uart_driver m32r_sio_reg = {
        .owner                  = THIS_MODULE,
        .driver_name            = "sio",
-        .devfs_name             = "tts/",
        .dev_name               = "ttyS",
        .major                  = TTY_MAJOR,
        .minor                  = 64,
diff --git a/drivers/serial/mcfserial.c b/drivers/serial/mcfserial.c
index 8ad242934368..29c0630e3e64 100644
--- a/drivers/serial/mcfserial.c
+++ b/drivers/serial/mcfserial.c
@@ -1713,7 +1713,6 @@ mcfrs_init(void)
        /* Initialize the tty_driver structure */
        mcfrs_serial_driver->owner = THIS_MODULE;
        mcfrs_serial_driver->name = "ttyS";
-        mcfrs_serial_driver->devfs_name = "ttys/";
        mcfrs_serial_driver->driver_name = "serial";
        mcfrs_serial_driver->major = TTY_MAJOR;
        mcfrs_serial_driver->minor_start = 64;
diff --git a/drivers/serial/mpc52xx_uart.c b/drivers/serial/mpc52xx_uart.c
index 6459edc7f5c5..1aa34844218c 100644
--- a/drivers/serial/mpc52xx_uart.c
+++ b/drivers/serial/mpc52xx_uart.c
@@ -693,7 +693,6 @@ static struct uart_driver mpc52xx_uart_driver = {
        .owner          = THIS_MODULE,
        .driver_name    = "mpc52xx_psc_uart",
        .dev_name       = "ttyPSC",
-        .devfs_name     = "ttyPSC",
        .major          = SERIAL_PSC_MAJOR,
        .minor          = SERIAL_PSC_MINOR,
        .nr             = MPC52xx_PSC_MAXNUM,
diff --git a/drivers/serial/mpsc.c b/drivers/serial/mpsc.c
index 94681922ea0a..1cd102f84bfa 100644
--- a/drivers/serial/mpsc.c
+++ b/drivers/serial/mpsc.c
@@ -315,7 +315,6 @@ struct mpsc_port_info *mpsc_device_remove(int index);
 #define MPSC_MAJOR              204
 #define MPSC_MINOR_START        44
 #define MPSC_DRIVER_NAME        "MPSC"
-#define MPSC_DEVFS_NAME         "ttymm/"
 #define MPSC_DEV_NAME           "ttyMM"
 #define MPSC_VERSION            "1.00"
@@ -1863,7 +1862,6 @@ static struct platform_driver mpsc_shared_driver = {
 static struct uart_driver mpsc_reg = {
        .owner       = THIS_MODULE,
        .driver_name = MPSC_DRIVER_NAME,
-        .devfs_name  = MPSC_DEVFS_NAME,
        .dev_name    = MPSC_DEV_NAME,
        .major       = MPSC_MAJOR,
        .minor       = MPSC_MINOR_START,
diff --git a/drivers/serial/pmac_zilog.c b/drivers/serial/pmac_zilog.c
index 513ff8597707..e3ba7e17a240 100644
--- a/drivers/serial/pmac_zilog.c
+++ b/drivers/serial/pmac_zilog.c
@@ -101,7 +101,6 @@ static DEFINE_MUTEX(pmz_irq_mutex);
 static struct uart_driver pmz_uart_reg = {
        .owner          =       THIS_MODULE,
        .driver_name    =       "ttyS",
-        .devfs_name     =       "tts/",
        .dev_name       =       "ttyS",
        .major          =       TTY_MAJOR,
 };
diff --git a/drivers/serial/pxa.c b/drivers/serial/pxa.c
index ae3649568541..0fa0ccc9ed27 100644
--- a/drivers/serial/pxa.c
+++ b/drivers/serial/pxa.c
@@ -780,7 +780,6 @@ static struct uart_pxa_port serial_pxa_ports[] = {
 static struct uart_driver serial_pxa_reg = {
        .owner          = THIS_MODULE,
        .driver_name    = "PXA serial",
-        .devfs_name     = "tts/",
        .dev_name       = "ttyS",
        .major          = TTY_MAJOR,
        .minor          = 64,
diff --git a/drivers/serial/s3c2410.c b/drivers/serial/s3c2410.c
index 837b6da520b3..4c62ab949ecc 100644
--- a/drivers/serial/s3c2410.c
+++ b/drivers/serial/s3c2410.c
@@ -149,7 +149,6 @@ s3c24xx_serial_dbg(const char *fmt, ...)
 /* UART name and device definitions */
 #define S3C24XX_SERIAL_NAME     "ttySAC"
-#define S3C24XX_SERIAL_DEVFS    "tts/"
 #define S3C24XX_SERIAL_MAJOR    204
 #define S3C24XX_SERIAL_MINOR    64
@@ -952,7 +951,6 @@ static struct uart_driver s3c24xx_uart_drv = {
        .nr             = 3,
        .cons           = S3C24XX_SERIAL_CONSOLE,
        .driver_name    = S3C24XX_SERIAL_NAME,
-        .devfs_name     = S3C24XX_SERIAL_DEVFS,
        .major          = S3C24XX_SERIAL_MAJOR,
        .minor          = S3C24XX_SERIAL_MINOR,
 };
diff --git a/drivers/serial/sa1100.c b/drivers/serial/sa1100.c
index c2d9068b491d..8bbd8567669c 100644
--- a/drivers/serial/sa1100.c
+++ b/drivers/serial/sa1100.c
@@ -816,7 +816,6 @@ static struct uart_driver sa1100_reg = {
        .owner                  = THIS_MODULE,
        .driver_name            = "ttySA",
        .dev_name               = "ttySA",
-        .devfs_name             = "ttySA",
        .major                  = SERIAL_SA1100_MAJOR,
        .minor                  = MINOR_START,
        .nr                     = NR_PORTS,
diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c
index 17839e753e4c..7dc1e67b6851 100644
--- a/drivers/serial/serial_core.c
+++ b/drivers/serial/serial_core.c
@@ -2153,7 +2153,6 @@ int uart_register_driver(struct uart_driver *drv)
        normal->owner           = drv->owner;
        normal->driver_name     = drv->driver_name;
-        normal->devfs_name      = drv->devfs_name;
        normal->name            = drv->dev_name;
        normal->major           = drv->major;
        normal->minor_start     = drv->minor;
@@ -2161,7 +2160,7 @@ int uart_register_driver(struct uart_driver *drv)
        normal->subtype         = SERIAL_TYPE_NORMAL;
        normal->init_termios    = tty_std_termios;
        normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
-        normal->flags           = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
+        normal->flags           = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
        normal->driver_state    = drv;
        tty_set_operations(normal, &uart_ops);
@@ -2312,7 +2311,7 @@ int uart_remove_one_port(struct uart_driver *drv, struct uart_port *port)
        mutex_unlock(&state->mutex);
        /*
-         * Remove the devices from devfs
+         * Remove the devices from the tty layer
         */
        tty_unregister_device(drv->tty_driver, port->line);
diff --git a/drivers/serial/serial_txx9.c b/drivers/serial/serial_txx9.c
index 3bdee64d1a99..a901a7e446f3 100644
--- a/drivers/serial/serial_txx9.c
+++ b/drivers/serial/serial_txx9.c
@@ -69,12 +69,10 @@ static char *serial_name = "TX39/49 Serial driver";
 #if !defined(CONFIG_SERIAL_TXX9_STDSERIAL)
 /* "ttyS" is used for standard serial driver */
 #define TXX9_TTY_NAME "ttyTX"
-#define TXX9_TTY_DEVFS_NAME "tttx/"
 #define TXX9_TTY_MINOR_START    (64 + 64)       /* ttyTX0(128), ttyTX1(129) */
 #else
 /* acts like standard serial driver */
 #define TXX9_TTY_NAME "ttyS"
-#define TXX9_TTY_DEVFS_NAME "tts/"
 #define TXX9_TTY_MINOR_START    64
 #endif
 #define TXX9_TTY_MAJOR  TTY_MAJOR
@@ -971,7 +969,6 @@ console_initcall(serial_txx9_console_init);
 static struct uart_driver serial_txx9_reg = {
        .owner                  = THIS_MODULE,
        .driver_name            = "serial_txx9",
-        .devfs_name             = TXX9_TTY_DEVFS_NAME,
        .dev_name               = TXX9_TTY_NAME,
        .major                  = TXX9_TTY_MAJOR,
        .minor                  = TXX9_TTY_MINOR_START,
diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c
index 44f6bf79bbe1..d97f3ca6cc29 100644
--- a/drivers/serial/sh-sci.c
+++ b/drivers/serial/sh-sci.c
@@ -1699,9 +1699,6 @@ static char banner[] __initdata =
 static struct uart_driver sci_uart_driver = {
        .owner          = THIS_MODULE,
        .driver_name    = "sci",
-#ifdef CONFIG_DEVFS_FS
-        .devfs_name     = "ttsc/",
-#endif
        .dev_name       = "ttySC",
        .major          = SCI_MAJOR,
        .minor          = SCI_MINOR_START,
diff --git a/drivers/serial/sunhv.c b/drivers/serial/sunhv.c
index ba22e256c6f7..d36bc4003399 100644
--- a/drivers/serial/sunhv.c
+++ b/drivers/serial/sunhv.c
@@ -353,7 +353,6 @@ static struct uart_ops sunhv_pops = {
 static struct uart_driver sunhv_reg = {
        .owner                  = THIS_MODULE,
        .driver_name            = "serial",
-        .devfs_name             = "tts/",
        .dev_name               = "ttyS",
        .major                  = TTY_MAJOR,
 };
diff --git a/drivers/serial/sunsab.c b/drivers/serial/sunsab.c
index e4c0fd2d6a9d..7da02d11c364 100644
--- a/drivers/serial/sunsab.c
+++ b/drivers/serial/sunsab.c
@@ -851,7 +851,6 @@ static struct uart_ops sunsab_pops = {
 static struct uart_driver sunsab_reg = {
        .owner                  = THIS_MODULE,
        .driver_name            = "serial",
-        .devfs_name             = "tts/",
        .dev_name               = "ttyS",
        .major                  = TTY_MAJOR,
 };
diff --git a/drivers/serial/sunsu.c b/drivers/serial/sunsu.c
index 0268b307c01e..6e28c25138cf 100644
--- a/drivers/serial/sunsu.c
+++ b/drivers/serial/sunsu.c
@@ -1265,7 +1265,6 @@ out:
 static struct uart_driver sunsu_reg = {
        .owner                  = THIS_MODULE,
        .driver_name            = "serial",
-        .devfs_name             = "tts/",
        .dev_name               = "ttyS",
        .major                  = TTY_MAJOR,
 };
diff --git a/drivers/serial/sunzilog.c b/drivers/serial/sunzilog.c
index 76c9bac9271f..9f42677287ad 100644
--- a/drivers/serial/sunzilog.c
+++ b/drivers/serial/sunzilog.c
@@ -1017,7 +1017,6 @@ static int zilog_irq = -1;
 static struct uart_driver sunzilog_reg = {
        .owner          =       THIS_MODULE,
        .driver_name    =       "ttyS",
-        .devfs_name     =       "tts/",
        .dev_name       =       "ttyS",
        .major          =       TTY_MAJOR,
 };
diff --git a/drivers/serial/v850e_uart.c b/drivers/serial/v850e_uart.c
index df705fda4243..a0da2aaf71c4 100644
--- a/drivers/serial/v850e_uart.c
+++ b/drivers/serial/v850e_uart.c
@@ -468,7 +468,6 @@ static struct uart_ops v850e_uart_ops = {
 static struct uart_driver v850e_uart_driver = {
        .owner                  = THIS_MODULE,
        .driver_name            = "v850e_uart",
-        .devfs_name             = "tts/",
        .dev_name               = "ttyS",
        .major                  = TTY_MAJOR,
        .minor                  = V850E_UART_MINOR_BASE,
diff --git a/drivers/serial/vr41xx_siu.c b/drivers/serial/vr41xx_siu.c
index df5e8713fa31..017571ffa19c 100644
--- a/drivers/serial/vr41xx_siu.c
+++ b/drivers/serial/vr41xx_siu.c
@@ -911,7 +911,6 @@ static struct uart_driver siu_uart_driver = {
        .owner          = THIS_MODULE,
        .driver_name    = "SIU",
        .dev_name       = "ttyVR",
-        .devfs_name     = "ttvr/",
        .major          = SIU_MAJOR,
        .minor          = SIU_MINOR_BASE,
        .cons           = SERIAL_VR41XX_CONSOLE,
diff --git a/drivers/tc/zs.c b/drivers/tc/zs.c
index 2dffa8e303b2..7f27b356eaf7 100644
--- a/drivers/tc/zs.c
+++ b/drivers/tc/zs.c
@@ -1745,7 +1745,6 @@ int __init zs_init(void)
        /* Not all of this is exactly right for us. */
        serial_driver->owner = THIS_MODULE;
-        serial_driver->devfs_name = "tts/";
        serial_driver->name = "ttyS";
        serial_driver->major = TTY_MAJOR;
        serial_driver->minor_start = 64;
@@ -1754,7 +1753,7 @@ int __init zs_init(void)
        serial_driver->init_termios = tty_std_termios;
        serial_driver->init_termios.c_cflag =
                B9600 | CS8 | CREAD | HUPCL | CLOCAL;
-        serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
+        serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
        tty_set_operations(serial_driver, &serial_ops);
        if (tty_register_driver(serial_driver))
diff --git a/drivers/telephony/phonedev.c b/drivers/telephony/phonedev.c
index e166fffea86b..e41f49afd0f4 100644
--- a/drivers/telephony/phonedev.c
+++ b/drivers/telephony/phonedev.c
@@ -28,7 +28,6 @@
 #include <linux/kmod.h>
 #include <linux/sem.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/mutex.h>
 #define PHONE_NUM_DEVICES       256
@@ -106,8 +105,6 @@ int phone_register_device(struct phone_device *p, int unit)
                if (phone_device[i] == NULL) {
                        phone_device[i] = p;
                        p->minor = i;
-                        devfs_mk_cdev(MKDEV(PHONE_MAJOR,i),
-                                S_IFCHR|S_IRUSR|S_IWUSR, "phone/%d", i);
                        mutex_unlock(&phone_lock);
                        return 0;
                }
@@ -125,7 +122,6 @@ void phone_unregister_device(struct phone_device *pfd)
        mutex_lock(&phone_lock);
        if (phone_device[pfd->minor] != pfd)
                panic("phone: bad unregister");
-        devfs_remove("phone/%d", pfd->minor);
        phone_device[pfd->minor] = NULL;
        mutex_unlock(&phone_lock);
 }
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index d41dc67ba4cc..3670d77e912c 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1145,12 +1145,11 @@ static int __init acm_init(void)
        acm_tty_driver->owner = THIS_MODULE,
        acm_tty_driver->driver_name = "acm",
        acm_tty_driver->name = "ttyACM",
-        acm_tty_driver->devfs_name = "usb/acm/",
        acm_tty_driver->major = ACM_TTY_MAJOR,
        acm_tty_driver->minor_start = 0,
        acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
        acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
-        acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS,
+        acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
        acm_tty_driver->init_termios = tty_std_termios;
        acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
        tty_set_operations(acm_tty_driver, &acm_ops);
diff --git a/drivers/usb/gadget/serial.c b/drivers/usb/gadget/serial.c
index 9d6e1d295528..416acac879df 100644
--- a/drivers/usb/gadget/serial.c
+++ b/drivers/usb/gadget/serial.c
@@ -588,12 +588,11 @@ static int __init gs_module_init(void)
        gs_tty_driver->owner = THIS_MODULE;
        gs_tty_driver->driver_name = GS_SHORT_NAME;
        gs_tty_driver->name = "ttygs";
-        gs_tty_driver->devfs_name = "usb/ttygs/";
        gs_tty_driver->major = GS_MAJOR;
        gs_tty_driver->minor_start = GS_MINOR_START;
        gs_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
        gs_tty_driver->subtype = SERIAL_TYPE_NORMAL;
-        gs_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
+        gs_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
        gs_tty_driver->init_termios = tty_std_termios;
        gs_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
        tty_set_operations(gs_tty_driver, &gs_tty_ops);
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index a30135c7cfe6..f466f89eeb6d 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -1059,13 +1059,12 @@ static int __init usb_serial_init(void)
        usb_serial_tty_driver->owner = THIS_MODULE;
        usb_serial_tty_driver->driver_name = "usbserial";
-        usb_serial_tty_driver->devfs_name = "usb/tts/";
        usb_serial_tty_driver->name =   "ttyUSB";
        usb_serial_tty_driver->major = SERIAL_TTY_MAJOR;
        usb_serial_tty_driver->minor_start = 0;
        usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
        usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL;
-        usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
+        usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
        usb_serial_tty_driver->init_termios = tty_std_termios;
        usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
        tty_set_operations(usb_serial_tty_driver, &serial_ops);
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index 31143afe7c95..a171daab0ad0 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -32,7 +32,6 @@
 #ifdef CONFIG_KMOD
 #include <linux/kmod.h>
 #endif
-#include <linux/devfs_fs_kernel.h>
 #include <linux/err.h>
 #include <linux/device.h>
 #include <linux/efi.h>
@@ -1331,8 +1330,6 @@ register_framebuffer(struct fb_info *fb_info)
        fb_add_videomode(&mode, &fb_info->modelist);
        registered_fb[i] = fb_info;
-        devfs_mk_cdev(MKDEV(FB_MAJOR, i),
-                        S_IFCHR | S_IRUGO | S_IWUGO, "fb/%d", i);
        event.info = fb_info;
        blocking_notifier_call_chain(&fb_notifier_list,
                            FB_EVENT_FB_REGISTERED, &event);
@@ -1359,7 +1356,6 @@ unregister_framebuffer(struct fb_info *fb_info)
        i = fb_info->node;
        if (!registered_fb[i])
                return -EINVAL;
-        devfs_remove("fb/%d", i);
        if (fb_info->pixmap.addr &&
            (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
@@ -1432,7 +1428,6 @@ fbmem_init(void)
 {
        create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL);
-        devfs_mk_dir("fb");
        if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
                printk("unable to get major %d for fb devs\n", FB_MAJOR);
diff --git a/fs/Makefile b/fs/Makefile
index d0ea6bfccf29..89135428a539 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -66,7 +66,6 @@ obj-$(CONFIG_MSDOS_FS)		+= msdos/
 obj-$(CONFIG_VFAT_FS)           += vfat/
 obj-$(CONFIG_BFS_FS)            += bfs/
 obj-$(CONFIG_ISO9660_FS)        += isofs/
-obj-$(CONFIG_DEVFS_FS)          += devfs/
 obj-$(CONFIG_HFSPLUS_FS)        += hfsplus/ # Before hfs to find wrapped HFS+
 obj-$(CONFIG_HFS_FS)            += hfs/
 obj-$(CONFIG_VXFS_FS)           += freevxfs/
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 7f7600e2381c..909cb0595b4e 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -12,7 +12,6 @@
 #include <linux/slab.h>
 #include <linux/kmod.h>
 #include <linux/major.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/smp_lock.h>
 #include <linux/highmem.h>
 #include <linux/blkdev.h>
diff --git a/fs/char_dev.c b/fs/char_dev.c
index f3418f7a6e9d..97986635b641 100644
--- a/fs/char_dev.c
+++ b/fs/char_dev.c
@@ -14,7 +14,6 @@
 #include <linux/errno.h>
 #include <linux/module.h>
 #include <linux/smp_lock.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/seq_file.h>
 #include <linux/kobject.h>
diff --git a/fs/coda/psdev.c b/fs/coda/psdev.c
index 7caee8d8ea3b..803aacf0d49c 100644
--- a/fs/coda/psdev.c
+++ b/fs/coda/psdev.c
@@ -28,7 +28,6 @@
 #include <linux/delay.h>
 #include <linux/skbuff.h>
 #include <linux/proc_fs.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/vmalloc.h>
 #include <linux/fs.h>
 #include <linux/file.h>
@@ -365,22 +364,12 @@ static int init_coda_psdev(void)
                err = PTR_ERR(coda_psdev_class);
                goto out_chrdev;
        }               
-        devfs_mk_dir ("coda");
+        for (i = 0; i < MAX_CODADEVS; i++)
-        for (i = 0; i < MAX_CODADEVS; i++) {
                class_device_create(coda_psdev_class, NULL,
                                MKDEV(CODA_PSDEV_MAJOR,i), NULL, "cfs%d", i);
-                err = devfs_mk_cdev(MKDEV(CODA_PSDEV_MAJOR, i),
-                                S_IFCHR|S_IRUSR|S_IWUSR, "coda/%d", i);
-                if (err)
-                        goto out_class;
-        }
        coda_sysctl_init();
        goto out;
-out_class:
-        for (i = 0; i < MAX_CODADEVS; i++) 
-                class_device_destroy(coda_psdev_class, MKDEV(CODA_PSDEV_MAJOR, i));
-        class_destroy(coda_psdev_class);
 out_chrdev:
        unregister_chrdev(CODA_PSDEV_MAJOR, "coda");
 out:
@@ -419,12 +408,9 @@ static int __init init_coda(void)
        }
        return 0;
 out:
-        for (i = 0; i < MAX_CODADEVS; i++) {
+        for (i = 0; i < MAX_CODADEVS; i++)
                class_device_destroy(coda_psdev_class, MKDEV(CODA_PSDEV_MAJOR, i));
-                devfs_remove("coda/%d", i);
-        }
        class_destroy(coda_psdev_class);
-        devfs_remove("coda");
        unregister_chrdev(CODA_PSDEV_MAJOR, "coda");
        coda_sysctl_clean();
 out1:
@@ -441,12 +427,9 @@ static void __exit exit_coda(void)
        if ( err != 0 ) {
                printk("coda: failed to unregister filesystem\n");
        }
-        for (i = 0; i < MAX_CODADEVS; i++) {
+        for (i = 0; i < MAX_CODADEVS; i++)
                class_device_destroy(coda_psdev_class, MKDEV(CODA_PSDEV_MAJOR, i));
-                devfs_remove("coda/%d", i);
-        }
        class_destroy(coda_psdev_class);
-        devfs_remove("coda");
        unregister_chrdev(CODA_PSDEV_MAJOR, "coda");
        coda_sysctl_clean();
        coda_destroy_inodecache();
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index d8ecfedef189..d8d50a70c58d 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -44,7 +44,6 @@
 #include <linux/loop.h>
 #include <linux/auto_fs.h>
 #include <linux/auto_fs4.h>
-#include <linux/devfs_fs.h>
 #include <linux/tty.h>
 #include <linux/vt_kern.h>
 #include <linux/fb.h>
diff --git a/fs/devfs/Makefile b/fs/devfs/Makefile
deleted file mode 100644
index 6dd8d1245e2c..000000000000
--- a/fs/devfs/Makefile
+++ /dev/null
@@ -1,8 +0,0 @@
-#
-# Makefile for the linux devfs-filesystem routines.
-#
-obj-$(CONFIG_DEVFS_FS) += devfs.o
-devfs-objs := base.o util.o
diff --git a/fs/devfs/base.c b/fs/devfs/base.c
deleted file mode 100644
index 51a97f132745..000000000000
--- a/fs/devfs/base.c
+++ /dev/null
@@ -1,2836 +0,0 @@
-/*  devfs (Device FileSystem) driver.
-    Copyright (C) 1998-2002  Richard Gooch
-    This library is free software; you can redistribute it and/or
-    modify it under the terms of the GNU Library General Public
-    License as published by the Free Software Foundation; either
-    version 2 of the License, or (at your option) any later version.
-    This library is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-    Library General Public License for more details.
-    You should have received a copy of the GNU Library General Public
-    License along with this library; if not, write to the Free
-    Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-    Richard Gooch may be reached by email at  rgooch@atnf.csiro.au
-    The postal address is:
-      Richard Gooch, c/o ATNF, P. O. Box 76, Epping, N.S.W., 2121, Australia.
-    ChangeLog
-    19980110   Richard Gooch <rgooch@atnf.csiro.au>
-               Original version.
-  v0.1
-    19980111   Richard Gooch <rgooch@atnf.csiro.au>
-               Created per-fs inode table rather than using inode->u.generic_ip
-  v0.2
-    19980111   Richard Gooch <rgooch@atnf.csiro.au>
-               Created .epoch inode which has a ctime of 0.
-               Fixed loss of named pipes when dentries lost.
-               Fixed loss of inode data when devfs_register() follows mknod().
-  v0.3
-    19980111   Richard Gooch <rgooch@atnf.csiro.au>
-               Fix for when compiling with CONFIG_KERNELD.
-    19980112   Richard Gooch <rgooch@atnf.csiro.au>
-               Fix for readdir() which sometimes didn't show entries.
-               Added <<tolerant>> option to <devfs_register>.
-  v0.4
-    19980113   Richard Gooch <rgooch@atnf.csiro.au>
-               Created <devfs_fill_file> function.
-  v0.5
-    19980115   Richard Gooch <rgooch@atnf.csiro.au>
-               Added subdirectory support. Major restructuring.
-    19980116   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed <find_by_dev> to not search major=0,minor=0.
-               Added symlink support.
-  v0.6
-    19980120   Richard Gooch <rgooch@atnf.csiro.au>
-               Created <devfs_mk_dir> function and support directory unregister
-    19980120   Richard Gooch <rgooch@atnf.csiro.au>
-               Auto-ownership uses real uid/gid rather than effective uid/gid.
-  v0.7
-    19980121   Richard Gooch <rgooch@atnf.csiro.au>
-               Supported creation of sockets.
-  v0.8
-    19980122   Richard Gooch <rgooch@atnf.csiro.au>
-               Added DEVFS_FL_HIDE_UNREG flag.
-               Interface change to <devfs_mk_symlink>.
-               Created <devfs_symlink> to support symlink(2).
-  v0.9
-    19980123   Richard Gooch <rgooch@atnf.csiro.au>
-               Added check to <devfs_fill_file> to check inode is in devfs.
-               Added optional traversal of symlinks.
-  v0.10
-    19980124   Richard Gooch <rgooch@atnf.csiro.au>
-               Created <devfs_get_flags> and <devfs_set_flags>.
-  v0.11
-    19980125   C. Scott Ananian <cananian@alumni.princeton.edu>
-               Created <devfs_find_handle>.
-    19980125   Richard Gooch <rgooch@atnf.csiro.au>
-               Allow removal of symlinks.
-  v0.12
-    19980125   Richard Gooch <rgooch@atnf.csiro.au>
-               Created <devfs_set_symlink_destination>.
-    19980126   Richard Gooch <rgooch@atnf.csiro.au>
-               Moved DEVFS_SUPER_MAGIC into header file.
-               Added DEVFS_FL_HIDE flag.
-               Created <devfs_get_maj_min>.
-               Created <devfs_get_handle_from_inode>.
-               Fixed minor bug in <find_by_dev>.
-    19980127   Richard Gooch <rgooch@atnf.csiro.au>
-               Changed interface to <find_by_dev>, <find_entry>,
-               <devfs_unregister>, <devfs_fill_file> and <devfs_find_handle>.
-               Fixed inode times when symlink created with symlink(2).
-  v0.13
-    19980129   C. Scott Ananian <cananian@alumni.princeton.edu>
-               Exported <devfs_set_symlink_destination>, <devfs_get_maj_min>
-               and <devfs_get_handle_from_inode>.
-    19980129   Richard Gooch <rgooch@atnf.csiro.au>
-               Created <devfs_unlink> to support unlink(2).
-  v0.14
-    19980129   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed kerneld support for entries in devfs subdirectories.
-    19980130   Richard Gooch <rgooch@atnf.csiro.au>
-               Bugfixes in <call_kerneld>.
-  v0.15
-    19980207   Richard Gooch <rgooch@atnf.csiro.au>
-               Call kerneld when looking up unregistered entries.
-  v0.16
-    19980326   Richard Gooch <rgooch@atnf.csiro.au>
-               Modified interface to <devfs_find_handle> for symlink traversal.
-  v0.17
-    19980331   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed persistence bug with device numbers for manually created
-               device files.
-               Fixed problem with recreating symlinks with different content.
-  v0.18
-    19980401   Richard Gooch <rgooch@atnf.csiro.au>
-               Changed to CONFIG_KMOD.
-               Hide entries which are manually unlinked.
-               Always invalidate devfs dentry cache when registering entries.
-               Created <devfs_rmdir> to support rmdir(2).
-               Ensure directories created by <devfs_mk_dir> are visible.
-  v0.19
-    19980402   Richard Gooch <rgooch@atnf.csiro.au>
-               Invalidate devfs dentry cache when making directories.
-               Invalidate devfs dentry cache when removing entries.
-               Fixed persistence bug with fifos.
-  v0.20
-    19980421   Richard Gooch <rgooch@atnf.csiro.au>
-               Print process command when debugging kerneld/kmod.
-               Added debugging for register/unregister/change operations.
-    19980422   Richard Gooch <rgooch@atnf.csiro.au>
-               Added "devfs=" boot options.
-  v0.21
-    19980426   Richard Gooch <rgooch@atnf.csiro.au>
-               No longer lock/unlock superblock in <devfs_put_super>.
-               Drop negative dentries when they are released.
-               Manage dcache more efficiently.
-  v0.22
-    19980427   Richard Gooch <rgooch@atnf.csiro.au>
-               Added DEVFS_FL_AUTO_DEVNUM flag.
-  v0.23
-    19980430   Richard Gooch <rgooch@atnf.csiro.au>
-               No longer set unnecessary methods.
-  v0.24
-    19980504   Richard Gooch <rgooch@atnf.csiro.au>
-               Added PID display to <call_kerneld> debugging message.
-               Added "after" debugging message to <call_kerneld>.
-    19980519   Richard Gooch <rgooch@atnf.csiro.au>
-               Added "diread" and "diwrite" boot options.
-    19980520   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed persistence problem with permissions.
-  v0.25
-    19980602   Richard Gooch <rgooch@atnf.csiro.au>
-               Support legacy device nodes.
-               Fixed bug where recreated inodes were hidden.
-  v0.26
-    19980602   Richard Gooch <rgooch@atnf.csiro.au>
-               Improved debugging in <get_vfs_inode>.
-    19980607   Richard Gooch <rgooch@atnf.csiro.au>
-               No longer free old dentries in <devfs_mk_dir>.
-               Free all dentries for a given entry when deleting inodes.
-  v0.27
-    19980627   Richard Gooch <rgooch@atnf.csiro.au>
-               Limit auto-device numbering to majors 128 to 239.
-  v0.28
-    19980629   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed inode times persistence problem.
-  v0.29
-    19980704   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed spelling in <devfs_readlink> debug.
-               Fixed bug in <devfs_setup> parsing "dilookup".
-  v0.30
-    19980705   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed devfs inode leak when manually recreating inodes.
-               Fixed permission persistence problem when recreating inodes.
-  v0.31
-    19980727   Richard Gooch <rgooch@atnf.csiro.au>
-               Removed harmless "unused variable" compiler warning.
-               Fixed modes for manually recreated device nodes.
-  v0.32
-    19980728   Richard Gooch <rgooch@atnf.csiro.au>
-               Added NULL devfs inode warning in <devfs_read_inode>.
-               Force all inode nlink values to 1.
-  v0.33
-    19980730   Richard Gooch <rgooch@atnf.csiro.au>
-               Added "dimknod" boot option.
-               Set inode nlink to 0 when freeing dentries.
-               Fixed modes for manually recreated symlinks.
-  v0.34
-    19980802   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed bugs in recreated directories and symlinks.
-  v0.35
-    19980806   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed bugs in recreated device nodes.
-    19980807   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed bug in currently unused <devfs_get_handle_from_inode>.
-               Defined new <devfs_handle_t> type.
-               Improved debugging when getting entries.
-               Fixed bug where directories could be emptied.
-  v0.36
-    19980809   Richard Gooch <rgooch@atnf.csiro.au>
-               Replaced dummy .epoch inode with .devfsd character device.
-    19980810   Richard Gooch <rgooch@atnf.csiro.au>
-               Implemented devfsd protocol revision 0.
-  v0.37
-    19980819   Richard Gooch <rgooch@atnf.csiro.au>
-               Added soothing message to warning in <devfs_d_iput>.
-  v0.38
-    19980829   Richard Gooch <rgooch@atnf.csiro.au>
-               Use GCC extensions for structure initialisations.
-               Implemented async open notification.
-               Incremented devfsd protocol revision to 1.
-  v0.39
-    19980908   Richard Gooch <rgooch@atnf.csiro.au>
-               Moved async open notification to end of <devfs_open>.
-  v0.40
-    19980910   Richard Gooch <rgooch@atnf.csiro.au>
-               Prepended "/dev/" to module load request.
-               Renamed <call_kerneld> to <call_kmod>.
-  v0.41
-    19980910   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed typo "AYSNC" -> "ASYNC".
-  v0.42
-    19980910   Richard Gooch <rgooch@atnf.csiro.au>
-               Added open flag for files.
-  v0.43
-    19980927   Richard Gooch <rgooch@atnf.csiro.au>
-               Set i_blocks=0 and i_blksize=1024 in <devfs_read_inode>.
-  v0.44
-    19981005   Richard Gooch <rgooch@atnf.csiro.au>
-               Added test for empty <<name>> in <devfs_find_handle>.
-               Renamed <generate_path> to <devfs_generate_path> and published.
-  v0.45
-    19981006   Richard Gooch <rgooch@atnf.csiro.au>
-               Created <devfs_get_fops>.
-  v0.46
-    19981007   Richard Gooch <rgooch@atnf.csiro.au>
-               Limit auto-device numbering to majors 144 to 239.
-  v0.47
-    19981010   Richard Gooch <rgooch@atnf.csiro.au>
-               Updated <devfs_follow_link> for VFS change in 2.1.125.
-  v0.48
-    19981022   Richard Gooch <rgooch@atnf.csiro.au>
-               Created DEVFS_ FL_COMPAT flag.
-  v0.49
-    19981023   Richard Gooch <rgooch@atnf.csiro.au>
-               Created "nocompat" boot option.
-  v0.50
-    19981025   Richard Gooch <rgooch@atnf.csiro.au>
-               Replaced "mount" boot option with "nomount".
-  v0.51
-    19981110   Richard Gooch <rgooch@atnf.csiro.au>
-               Created "only" boot option.
-  v0.52
-    19981112   Richard Gooch <rgooch@atnf.csiro.au>
-               Added DEVFS_FL_REMOVABLE flag.
-  v0.53
-    19981114   Richard Gooch <rgooch@atnf.csiro.au>
-               Only call <scan_dir_for_removable> on first call to
-               <devfs_readdir>.
-  v0.54
-    19981205   Richard Gooch <rgooch@atnf.csiro.au>
-               Updated <devfs_rmdir> for VFS change in 2.1.131.
-  v0.55
-    19981218   Richard Gooch <rgooch@atnf.csiro.au>
-               Created <devfs_mk_compat>.
-    19981220   Richard Gooch <rgooch@atnf.csiro.au>
-               Check for partitions on removable media in <devfs_lookup>.
-  v0.56
-    19990118   Richard Gooch <rgooch@atnf.csiro.au>
-               Added support for registering regular files.
-               Created <devfs_set_file_size>.
-               Update devfs inodes from entries if not changed through FS.
-  v0.57
-    19990124   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed <devfs_fill_file> to only initialise temporary inodes.
-               Trap for NULL fops in <devfs_register>.
-               Return -ENODEV in <devfs_fill_file> for non-driver inodes.
-  v0.58
-    19990126   Richard Gooch <rgooch@atnf.csiro.au>
-               Switched from PATH_MAX to DEVFS_PATHLEN.
-  v0.59
-    19990127   Richard Gooch <rgooch@atnf.csiro.au>
-               Created "nottycompat" boot option.
-  v0.60
-    19990318   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed <devfsd_read> to not overrun event buffer.
-  v0.61
-    19990329   Richard Gooch <rgooch@atnf.csiro.au>
-               Created <devfs_auto_unregister>.
-  v0.62
-    19990330   Richard Gooch <rgooch@atnf.csiro.au>
-               Don't return unregistred entries in <devfs_find_handle>.
-               Panic in <devfs_unregister> if entry unregistered.
-    19990401   Richard Gooch <rgooch@atnf.csiro.au>
-               Don't panic in <devfs_auto_unregister> for duplicates.
-  v0.63
-    19990402   Richard Gooch <rgooch@atnf.csiro.au>
-               Don't unregister already unregistered entries in <unregister>.
-  v0.64
-    19990510   Richard Gooch <rgooch@atnf.csiro.au>
-               Disable warning messages when unable to read partition table for
-               removable media.
-  v0.65
-    19990512   Richard Gooch <rgooch@atnf.csiro.au>
-               Updated <devfs_lookup> for VFS change in 2.3.1-pre1.
-               Created "oops-on-panic" boot option.
-               Improved debugging in <devfs_register> and <devfs_unregister>.
-  v0.66
-    19990519   Richard Gooch <rgooch@atnf.csiro.au>
-               Added documentation for some functions.
-    19990525   Richard Gooch <rgooch@atnf.csiro.au>
-               Removed "oops-on-panic" boot option: now always Oops.
-  v0.67
-    19990531   Richard Gooch <rgooch@atnf.csiro.au>
-               Improved debugging in <devfs_register>.
-  v0.68
-    19990604   Richard Gooch <rgooch@atnf.csiro.au>
-               Added "diunlink" and "nokmod" boot options.
-               Removed superfluous warning message in <devfs_d_iput>.
-  v0.69
-    19990611   Richard Gooch <rgooch@atnf.csiro.au>
-               Took account of change to <d_alloc_root>.
-  v0.70
-    19990614   Richard Gooch <rgooch@atnf.csiro.au>
-               Created separate event queue for each mounted devfs.
-               Removed <devfs_invalidate_dcache>.
-               Created new ioctl()s.
-               Incremented devfsd protocol revision to 3.
-               Fixed bug when re-creating directories: contents were lost.
-               Block access to inodes until devfsd updates permissions.
-    19990615   Richard Gooch <rgooch@atnf.csiro.au>
-               Support 2.2.x kernels.
-  v0.71
-    19990623   Richard Gooch <rgooch@atnf.csiro.au>
-               Switched to sending process uid/gid to devfsd.
-               Renamed <call_kmod> to <try_modload>.
-               Added DEVFSD_NOTIFY_LOOKUP event.
-    19990624   Richard Gooch <rgooch@atnf.csiro.au>
-               Added DEVFSD_NOTIFY_CHANGE event.
-               Incremented devfsd protocol revision to 4.
-  v0.72
-    19990713   Richard Gooch <rgooch@atnf.csiro.au>
-               Return EISDIR rather than EINVAL for read(2) on directories.
-  v0.73
-    19990809   Richard Gooch <rgooch@atnf.csiro.au>
-               Changed <devfs_setup> to new __init scheme.
-  v0.74
-    19990901   Richard Gooch <rgooch@atnf.csiro.au>
-               Changed remaining function declarations to new __init scheme.
-  v0.75
-    19991013   Richard Gooch <rgooch@atnf.csiro.au>
-               Created <devfs_get_info>, <devfs_set_info>,
-               <devfs_get_first_child> and <devfs_get_next_sibling>.
-               Added <<dir>> parameter to <devfs_register>, <devfs_mk_compat>,
-               <devfs_mk_dir> and <devfs_find_handle>.
-               Work sponsored by SGI.
-  v0.76
-    19991017   Richard Gooch <rgooch@atnf.csiro.au>
-               Allow multiple unregistrations.
-               Work sponsored by SGI.
-  v0.77
-    19991026   Richard Gooch <rgooch@atnf.csiro.au>
-               Added major and minor number to devfsd protocol.
-               Incremented devfsd protocol revision to 5.
-               Work sponsored by SGI.
-  v0.78
-    19991030   Richard Gooch <rgooch@atnf.csiro.au>
-               Support info pointer for all devfs entry types.
-               Added <<info>> parameter to <devfs_mk_dir> and
-               <devfs_mk_symlink>.
-               Work sponsored by SGI.
-  v0.79
-    19991031   Richard Gooch <rgooch@atnf.csiro.au>
-               Support "../" when searching devfs namespace.
-               Work sponsored by SGI.
-  v0.80
-    19991101   Richard Gooch <rgooch@atnf.csiro.au>
-               Created <devfs_get_unregister_slave>.
-               Work sponsored by SGI.
-  v0.81
-    19991103   Richard Gooch <rgooch@atnf.csiro.au>
-               Exported <devfs_get_parent>.
-               Work sponsored by SGI.
-  v0.82
-    19991104   Richard Gooch <rgooch@atnf.csiro.au>
-               Removed unused <devfs_set_symlink_destination>.
-    19991105   Richard Gooch <rgooch@atnf.csiro.au>
-               Do not hide entries from devfsd or children.
-               Removed DEVFS_ FL_TTY_COMPAT flag.
-               Removed "nottycompat" boot option.
-               Removed <devfs_mk_compat>.
-               Work sponsored by SGI.
-  v0.83
-    19991107   Richard Gooch <rgooch@atnf.csiro.au>
-               Added DEVFS_FL_WAIT flag.
-               Work sponsored by SGI.
-  v0.84
-    19991107   Richard Gooch <rgooch@atnf.csiro.au>
-               Support new "disc" naming scheme in <get_removable_partition>.
-               Allow NULL fops in <devfs_register>.
-               Work sponsored by SGI.
-  v0.85
-    19991110   Richard Gooch <rgooch@atnf.csiro.au>
-               Fall back to major table if NULL fops given to <devfs_register>.
-               Work sponsored by SGI.
-  v0.86
-    19991204   Richard Gooch <rgooch@atnf.csiro.au>
-               Support fifos when unregistering.
-               Work sponsored by SGI.
-  v0.87
-    19991209   Richard Gooch <rgooch@atnf.csiro.au>
-               Removed obsolete DEVFS_ FL_COMPAT and DEVFS_ FL_TOLERANT flags.
-               Work sponsored by SGI.
-  v0.88
-    19991214   Richard Gooch <rgooch@atnf.csiro.au>
-               Removed kmod support.
-               Work sponsored by SGI.
-  v0.89
-    19991216   Richard Gooch <rgooch@atnf.csiro.au>
-               Improved debugging in <get_vfs_inode>.
-               Ensure dentries created by devfsd will be cleaned up.
-               Work sponsored by SGI.
-  v0.90
-    19991223   Richard Gooch <rgooch@atnf.csiro.au>
-               Created <devfs_get_name>.
-               Work sponsored by SGI.
-  v0.91
-    20000203   Richard Gooch <rgooch@atnf.csiro.au>
-               Ported to kernel 2.3.42.
-               Removed <devfs_fill_file>.
-               Work sponsored by SGI.
-  v0.92
-    20000306   Richard Gooch <rgooch@atnf.csiro.au>
-               Added DEVFS_ FL_NO_PERSISTENCE flag.
-               Removed unnecessary call to <update_devfs_inode_from_entry> in
-               <devfs_readdir>.
-               Work sponsored by SGI.
-  v0.93
-    20000413   Richard Gooch <rgooch@atnf.csiro.au>
-               Set inode->i_size to correct size for symlinks.
-    20000414   Richard Gooch <rgooch@atnf.csiro.au>
-               Only give lookup() method to directories to comply with new VFS
-               assumptions.
-               Work sponsored by SGI.
-    20000415   Richard Gooch <rgooch@atnf.csiro.au>
-               Remove unnecessary tests in symlink methods.
-               Don't kill existing block ops in <devfs_read_inode>.
-               Work sponsored by SGI.
-  v0.94
-    20000424   Richard Gooch <rgooch@atnf.csiro.au>
-               Don't create missing directories in <devfs_find_handle>.
-               Work sponsored by SGI.
-  v0.95
-    20000430   Richard Gooch <rgooch@atnf.csiro.au>
-               Added CONFIG_DEVFS_MOUNT.
-               Work sponsored by SGI.
-  v0.96
-    20000608   Richard Gooch <rgooch@atnf.csiro.au>
-               Disabled multi-mount capability (use VFS bindings instead).
-               Work sponsored by SGI.
-  v0.97
-    20000610   Richard Gooch <rgooch@atnf.csiro.au>
-               Switched to FS_SINGLE to disable multi-mounts.
-    20000612   Richard Gooch <rgooch@atnf.csiro.au>
-               Removed module support.
-               Removed multi-mount code.
-               Removed compatibility macros: VFS has changed too much.
-               Work sponsored by SGI.
-  v0.98
-    20000614   Richard Gooch <rgooch@atnf.csiro.au>
-               Merged devfs inode into devfs entry.
-               Work sponsored by SGI.
-  v0.99
-    20000619   Richard Gooch <rgooch@atnf.csiro.au>
-               Removed dead code in <devfs_register> which used to call
-               <free_dentries>.
-               Work sponsored by SGI.
-  v0.100
-    20000621   Richard Gooch <rgooch@atnf.csiro.au>
-               Changed interface to <devfs_register>.
-               Work sponsored by SGI.
-  v0.101
-    20000622   Richard Gooch <rgooch@atnf.csiro.au>
-               Simplified interface to <devfs_mk_symlink> and <devfs_mk_dir>.
-               Simplified interface to <devfs_find_handle>.
-               Work sponsored by SGI.
-  v0.102
-    20010519   Richard Gooch <rgooch@atnf.csiro.au>
-               Ensure <devfs_generate_path> terminates string for root entry.
-               Exported <devfs_get_name> to modules.
-    20010520   Richard Gooch <rgooch@atnf.csiro.au>
-               Make <devfs_mk_symlink> send events to devfsd.
-               Cleaned up option processing in <devfs_setup>.
-    20010521   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed bugs in handling symlinks: could leak or cause Oops.
-    20010522   Richard Gooch <rgooch@atnf.csiro.au>
-               Cleaned up directory handling by separating fops.
-  v0.103
-    20010601   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed handling of inverted options in <devfs_setup>.
-  v0.104
-    20010604   Richard Gooch <rgooch@atnf.csiro.au>
-               Adjusted <try_modload> to account for <devfs_generate_path> fix.
-  v0.105
-    20010617   Richard Gooch <rgooch@atnf.csiro.au>
-               Answered question posed by Al Viro and removed his comments.
-               Moved setting of registered flag after other fields are changed.
-               Fixed race between <devfsd_close> and <devfsd_notify_one>.
-               Global VFS changes added bogus BKL to <devfsd_close>: removed.
-               Widened locking in <devfs_readlink> and <devfs_follow_link>.
-               Replaced <devfsd_read> stack usage with <devfsd_ioctl> kmalloc.
-               Simplified locking in <devfsd_ioctl> and fixed memory leak.
-  v0.106
-    20010709   Richard Gooch <rgooch@atnf.csiro.au>
-               Removed broken devnum allocation and use <devfs_alloc_devnum>.
-               Fixed old devnum leak by calling new <devfs_dealloc_devnum>.
-  v0.107
-    20010712   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed bug in <devfs_setup> which could hang boot process.
-  v0.108
-    20010730   Richard Gooch <rgooch@atnf.csiro.au>
-               Added DEVFSD_NOTIFY_DELETE event.
-    20010801   Richard Gooch <rgooch@atnf.csiro.au>
-               Removed #include <asm/segment.h>.
-  v0.109
-    20010807   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed inode table races by removing it and using
-               inode->u.generic_ip instead.
-               Moved <devfs_read_inode> into <get_vfs_inode>.
-               Moved <devfs_write_inode> into <devfs_notify_change>.
-  v0.110
-    20010808   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed race in <devfs_do_symlink> for uni-processor.
-  v0.111
-    20010818   Richard Gooch <rgooch@atnf.csiro.au>
-               Removed remnant of multi-mount support in <devfs_mknod>.
-               Removed unused DEVFS_FL_SHOW_UNREG flag.
-  v0.112
-    20010820   Richard Gooch <rgooch@atnf.csiro.au>
-               Removed nlink field from struct devfs_inode.
-  v0.113
-    20010823   Richard Gooch <rgooch@atnf.csiro.au>
-               Replaced BKL with global rwsem to protect symlink data (quick
-               and dirty hack).
-  v0.114
-    20010827   Richard Gooch <rgooch@atnf.csiro.au>
-               Replaced global rwsem for symlink with per-link refcount.
-  v0.115
-    20010919   Richard Gooch <rgooch@atnf.csiro.au>
-               Set inode->i_mapping->a_ops for block nodes in <get_vfs_inode>.
-  v0.116
-    20011008   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed overrun in <devfs_link> by removing function (not needed).
-    20011009   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed buffer underrun in <try_modload>.
-    20011029   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed race in <devfsd_ioctl> when setting event mask.
-    20011114   Richard Gooch <rgooch@atnf.csiro.au>
-               First release of new locking code.
-  v1.0
-    20011117   Richard Gooch <rgooch@atnf.csiro.au>
-               Discard temporary buffer, now use "%s" for dentry names.
-    20011118   Richard Gooch <rgooch@atnf.csiro.au>
-               Don't generate path in <try_modload>: use fake entry instead.
-               Use "existing" directory in <_devfs_make_parent_for_leaf>.
-    20011122   Richard Gooch <rgooch@atnf.csiro.au>
-               Use slab cache rather than fixed buffer for devfsd events.
-  v1.1
-    20011125   Richard Gooch <rgooch@atnf.csiro.au>
-               Send DEVFSD_NOTIFY_REGISTERED events in <devfs_mk_dir>.
-    20011127   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed locking bug in <devfs_d_revalidate_wait> due to typo.
-               Do not send CREATE, CHANGE, ASYNC_OPEN or DELETE events from
-               devfsd or children.
-  v1.2
-    20011202   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed bug in <devfsd_read>: was dereferencing freed pointer.
-  v1.3
-    20011203   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed bug in <devfsd_close>: was dereferencing freed pointer.
-               Added process group check for devfsd privileges.
-  v1.4
-    20011204   Richard Gooch <rgooch@atnf.csiro.au>
-               Use SLAB_ATOMIC in <devfsd_notify_de> from <devfs_d_delete>.
-  v1.5
-    20011211   Richard Gooch <rgooch@atnf.csiro.au>
-               Return old entry in <devfs_mk_dir> for 2.4.x kernels.
-    20011212   Richard Gooch <rgooch@atnf.csiro.au>
-               Increment refcount on module in <check_disc_changed>.
-    20011215   Richard Gooch <rgooch@atnf.csiro.au>
-               Created <devfs_get_handle> and exported <devfs_put>.
-               Increment refcount on module in <devfs_get_ops>.
-               Created <devfs_put_ops>.
-  v1.6
-    20011216   Richard Gooch <rgooch@atnf.csiro.au>
-               Added poisoning to <devfs_put>.
-               Improved debugging messages.
-  v1.7
-    20011221   Richard Gooch <rgooch@atnf.csiro.au>
-               Corrected (made useful) debugging message in <unregister>.
-               Moved <kmem_cache_create> in <mount_devfs_fs> to <init_devfs_fs>
-    20011224   Richard Gooch <rgooch@atnf.csiro.au>
-               Added magic number to guard against scribbling drivers.
-    20011226   Richard Gooch <rgooch@atnf.csiro.au>
-               Only return old entry in <devfs_mk_dir> if a directory.
-               Defined macros for error and debug messages.
-  v1.8
-    20020113   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed (rare, old) race in <devfs_lookup>.
-  v1.9
-    20020120   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed deadlock bug in <devfs_d_revalidate_wait>.
-               Tag VFS deletable in <devfs_mk_symlink> if handle ignored.
-  v1.10
-    20020129   Richard Gooch <rgooch@atnf.csiro.au>
-               Added KERN_* to remaining messages.
-               Cleaned up declaration of <stat_read>.
-  v1.11
-    20020219   Richard Gooch <rgooch@atnf.csiro.au>
-               Changed <devfs_rmdir> to allow later additions if not yet empty.
-  v1.12
-    20020406   Richard Gooch <rgooch@atnf.csiro.au>
-               Removed silently introduced calls to lock_kernel() and
-               unlock_kernel() due to recent VFS locking changes. BKL isn't
-               required in devfs.
-  v1.13
-    20020428   Richard Gooch <rgooch@atnf.csiro.au>
-               Removed 2.4.x compatibility code.
-  v1.14
-    20020510   Richard Gooch <rgooch@atnf.csiro.au>
-               Added BKL to <devfs_open> because drivers still need it.
-  v1.15
-    20020512   Richard Gooch <rgooch@atnf.csiro.au>
-               Protected <scan_dir_for_removable> and <get_removable_partition>
-               from changing directory contents.
-  v1.16
-    20020514   Richard Gooch <rgooch@atnf.csiro.au>
-               Minor cleanup of <scan_dir_for_removable>.
-  v1.17
-    20020721   Richard Gooch <rgooch@atnf.csiro.au>
-               Switched to ISO C structure field initialisers.
-               Switch to set_current_state() and move before add_wait_queue().
-    20020722   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed devfs entry leak in <devfs_readdir> when *readdir fails.
-  v1.18
-    20020725   Richard Gooch <rgooch@atnf.csiro.au>
-               Created <devfs_find_and_unregister>.
-  v1.19
-    20020728   Richard Gooch <rgooch@atnf.csiro.au>
-               Removed deprecated <devfs_find_handle>.
-  v1.20
-    20020820   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed module unload race in <devfs_open>.
-  v1.21
-    20021013   Richard Gooch <rgooch@atnf.csiro.au>
-               Removed DEVFS_ FL_AUTO_OWNER.
-               Switched lingering structure field initialiser to ISO C.
-               Added locking when updating FCB flags.
-  v1.22
-*/
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/time.h>
-#include <linux/tty.h>
-#include <linux/timer.h>
-#include <linux/config.h>
-#include <linux/kernel.h>
-#include <linux/wait.h>
-#include <linux/string.h>
-#include <linux/slab.h>
-#include <linux/ioport.h>
-#include <linux/delay.h>
-#include <linux/ctype.h>
-#include <linux/mm.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/devfs_fs.h>
-#include <linux/devfs_fs_kernel.h>
-#include <linux/smp_lock.h>
-#include <linux/smp.h>
-#include <linux/rwsem.h>
-#include <linux/sched.h>
-#include <linux/namei.h>
-#include <linux/bitops.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-#include <asm/processor.h>
-#include <asm/system.h>
-#include <asm/pgtable.h>
-#include <asm/atomic.h>
-#define DEVFS_VERSION            "2004-01-31"
-#define DEVFS_NAME "devfs"
-#define FIRST_INODE 1
-#define STRING_LENGTH 256
-#define FAKE_BLOCK_SIZE 1024
-#define POISON_PTR ( *(void **) poison_array )
-#define MAGIC_VALUE 0x327db823
-#ifndef TRUE
-#  define TRUE 1
-#  define FALSE 0
-#endif
-#define MODE_DIR (S_IFDIR | S_IWUSR | S_IRUGO | S_IXUGO)
-#define DEBUG_NONE         0x0000000
-#define DEBUG_MODULE_LOAD  0x0000001
-#define DEBUG_REGISTER     0x0000002
-#define DEBUG_UNREGISTER   0x0000004
-#define DEBUG_FREE         0x0000008
-#define DEBUG_SET_FLAGS    0x0000010
-#define DEBUG_S_READ       0x0000100    /*  Break  */
-#define DEBUG_I_LOOKUP     0x0001000    /*  Break  */
-#define DEBUG_I_CREATE     0x0002000
-#define DEBUG_I_GET        0x0004000
-#define DEBUG_I_CHANGE     0x0008000
-#define DEBUG_I_UNLINK     0x0010000
-#define DEBUG_I_RLINK      0x0020000
-#define DEBUG_I_FLINK      0x0040000
-#define DEBUG_I_MKNOD      0x0080000
-#define DEBUG_F_READDIR    0x0100000    /*  Break  */
-#define DEBUG_D_DELETE     0x1000000    /*  Break  */
-#define DEBUG_D_RELEASE    0x2000000
-#define DEBUG_D_IPUT       0x4000000
-#define DEBUG_ALL          0xfffffff
-#define DEBUG_DISABLED     DEBUG_NONE
-#define OPTION_NONE             0x00
-#define OPTION_MOUNT            0x01
-#define PRINTK(format, args...) \
-   {printk (KERN_ERR "%s" format, __FUNCTION__ , ## args);}
-#define OOPS(format, args...) \
-   {printk (KERN_CRIT "%s" format, __FUNCTION__ , ## args); \
-    printk ("Forcing Oops\n"); \
-    BUG();}
-#ifdef CONFIG_DEVFS_DEBUG
-#  define VERIFY_ENTRY(de) \
-   {if ((de) && (de)->magic_number != MAGIC_VALUE) \
-        OOPS ("(%p): bad magic value: %x\n", (de), (de)->magic_number);}
-#  define WRITE_ENTRY_MAGIC(de,magic) (de)->magic_number = (magic)
-#  define DPRINTK(flag, format, args...) \
-   {if (devfs_debug & flag) \
-        printk (KERN_INFO "%s" format, __FUNCTION__ , ## args);}
-#else
-#  define VERIFY_ENTRY(de)
-#  define WRITE_ENTRY_MAGIC(de,magic)
-#  define DPRINTK(flag, format, args...)
-#endif
-typedef struct devfs_entry *devfs_handle_t;
-struct directory_type {
-        rwlock_t lock;          /*  Lock for searching(R)/updating(W)   */
-        struct devfs_entry *first;
-        struct devfs_entry *last;
-        unsigned char no_more_additions:1;
-};
-struct symlink_type {
-        unsigned int length;    /*  Not including the NULL-termimator       */
-        char *linkname;         /*  This is NULL-terminated                 */
-};
-struct devfs_inode {            /*  This structure is for "persistent" inode storage  */
-        struct dentry *dentry;
-        struct timespec atime;
-        struct timespec mtime;
-        struct timespec ctime;
-        unsigned int ino;       /*  Inode number as seen in the VFS         */
-        uid_t uid;
-        gid_t gid;
-};
-struct devfs_entry {
-#ifdef CONFIG_DEVFS_DEBUG
-        unsigned int magic_number;
-#endif
-        void *info;
-        atomic_t refcount;      /*  When this drops to zero, it's unused    */
-        union {
-                struct directory_type dir;
-                dev_t dev;
-                struct symlink_type symlink;
-                const char *name;       /*  Only used for (mode == 0)               */
-        } u;
-        struct devfs_entry *prev;       /*  Previous entry in the parent directory  */
-        struct devfs_entry *next;       /*  Next entry in the parent directory      */
-        struct devfs_entry *parent;     /*  The parent directory                    */
-        struct devfs_inode inode;
-        umode_t mode;
-        unsigned short namelen; /*  I think 64k+ filenames are a way off... */
-        unsigned char vfs:1;    /*  Whether the VFS may delete the entry   */
-        char name[1];           /*  This is just a dummy: the allocated array
-                                   is bigger. This is NULL-terminated      */
-};
-/*  The root of the device tree  */
-static struct devfs_entry *root_entry;
-struct devfsd_buf_entry {
-        struct devfs_entry *de; /*  The name is generated with this         */
-        unsigned short type;    /*  The type of event                       */
-        umode_t mode;
-        uid_t uid;
-        gid_t gid;
-        struct devfsd_buf_entry *next;
-};
-struct fs_info {                /*  This structure is for the mounted devfs  */
-        struct super_block *sb;
-        spinlock_t devfsd_buffer_lock;  /*  Lock when inserting/deleting events  */
-        struct devfsd_buf_entry *devfsd_first_event;
-        struct devfsd_buf_entry *devfsd_last_event;
-        volatile int devfsd_sleeping;
-        volatile struct task_struct *devfsd_task;
-        volatile pid_t devfsd_pgrp;
-        volatile struct file *devfsd_file;
-        struct devfsd_notify_struct *devfsd_info;
-        volatile unsigned long devfsd_event_mask;
-        atomic_t devfsd_overrun_count;
-        wait_queue_head_t devfsd_wait_queue;    /*  Wake devfsd on input       */
-        wait_queue_head_t revalidate_wait_queue;        /*  Wake when devfsd sleeps    */
-};
-static struct fs_info fs_info = {.devfsd_buffer_lock = SPIN_LOCK_UNLOCKED };
-static kmem_cache_t *devfsd_buf_cache;
-#ifdef CONFIG_DEVFS_DEBUG
-static unsigned int devfs_debug_init __initdata = DEBUG_NONE;
-static unsigned int devfs_debug = DEBUG_NONE;
-static DEFINE_SPINLOCK(stat_lock);
-static unsigned int stat_num_entries;
-static unsigned int stat_num_bytes;
-#endif
-static unsigned char poison_array[8] =
-    { 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a };
-#ifdef CONFIG_DEVFS_MOUNT
-static unsigned int boot_options = OPTION_MOUNT;
-#else
-static unsigned int boot_options = OPTION_NONE;
-#endif
-/*  Forward function declarations  */
-static devfs_handle_t _devfs_walk_path(struct devfs_entry *dir,
-                                       const char *name, int namelen,
-                                       int traverse_symlink);
-static ssize_t devfsd_read(struct file *file, char __user *buf, size_t len,
-                           loff_t * ppos);
-static int devfsd_ioctl(struct inode *inode, struct file *file,
-                        unsigned int cmd, unsigned long arg);
-static int devfsd_close(struct inode *inode, struct file *file);
-#ifdef CONFIG_DEVFS_DEBUG
-static ssize_t stat_read(struct file *file, char __user *buf, size_t len,
-                         loff_t * ppos);
-static const struct file_operations stat_fops = {
-        .open = nonseekable_open,
-        .read = stat_read,
-};
-#endif
-/*  Devfs daemon file operations  */
-static const struct file_operations devfsd_fops = {
-        .open = nonseekable_open,
-        .read = devfsd_read,
-        .ioctl = devfsd_ioctl,
-        .release = devfsd_close,
-};
-/*  Support functions follow  */
-/**
- *      devfs_get - Get a reference to a devfs entry.
- *      @de:  The devfs entry.
- */
-static struct devfs_entry *devfs_get(struct devfs_entry *de)
-{
-        VERIFY_ENTRY(de);
-        if (de)
-                atomic_inc(&de->refcount);
-        return de;
-}                               /*  End Function devfs_get  */
-/**
- *      devfs_put - Put (release) a reference to a devfs entry.
- *      @de:  The handle to the devfs entry.
- */
-static void devfs_put(devfs_handle_t de)
-{
-        if (!de)
-                return;
-        VERIFY_ENTRY(de);
-        if (de->info == POISON_PTR)
-                OOPS("(%p): poisoned pointer\n", de);
-        if (!atomic_dec_and_test(&de->refcount))
-                return;
-        if (de == root_entry)
-                OOPS("(%p): root entry being freed\n", de);
-        DPRINTK(DEBUG_FREE, "(%s): de: %p, parent: %p \"%s\"\n",
-                de->name, de, de->parent,
-                de->parent ? de->parent->name : "no parent");
-        if (S_ISLNK(de->mode))
-                kfree(de->u.symlink.linkname);
-        WRITE_ENTRY_MAGIC(de, 0);
-#ifdef CONFIG_DEVFS_DEBUG
-        spin_lock(&stat_lock);
-        --stat_num_entries;
-        stat_num_bytes -= sizeof *de + de->namelen;
-        if (S_ISLNK(de->mode))
-                stat_num_bytes -= de->u.symlink.length + 1;
-        spin_unlock(&stat_lock);
-#endif
-        de->info = POISON_PTR;
-        kfree(de);
-}                               /*  End Function devfs_put  */
-/**
- *      _devfs_search_dir - Search for a devfs entry in a directory.
- *      @dir:  The directory to search.
- *      @name:  The name of the entry to search for.
- *      @namelen:  The number of characters in @name.
- *
- *  Search for a devfs entry in a directory and returns a pointer to the entry
- *   on success, else %NULL. The directory must be locked already.
- *   An implicit devfs_get() is performed on the returned entry.
- */
-static struct devfs_entry *_devfs_search_dir(struct devfs_entry *dir,
-                                             const char *name,
-                                             unsigned int namelen)
-{
-        struct devfs_entry *curr;
-        if (!S_ISDIR(dir->mode)) {
-                PRINTK("(%s): not a directory\n", dir->name);
-                return NULL;
-        }
-        for (curr = dir->u.dir.first; curr != NULL; curr = curr->next) {
-                if (curr->namelen != namelen)
-                        continue;
-                if (memcmp(curr->name, name, namelen) == 0)
-                        break;
-                /*  Not found: try the next one  */
-        }
-        return devfs_get(curr);
-}                               /*  End Function _devfs_search_dir  */
-/**
- *      _devfs_alloc_entry - Allocate a devfs entry.
- *      @name:     the name of the entry
- *      @namelen:  the number of characters in @name
- *      @mode:     the mode for the entry
- *
- *  Allocate a devfs entry and returns a pointer to the entry on success, else
- *   %NULL.
- */
-static struct devfs_entry *_devfs_alloc_entry(const char *name,
-                                              unsigned int namelen,
-                                              umode_t mode)
-{
-        struct devfs_entry *new;
-        static unsigned long inode_counter = FIRST_INODE;
-        static DEFINE_SPINLOCK(counter_lock);
-        if (name && (namelen < 1))
-                namelen = strlen(name);
-        if ((new = kmalloc(sizeof *new + namelen, GFP_KERNEL)) == NULL)
-                return NULL;
-        memset(new, 0, sizeof *new + namelen);  /*  Will set '\0' on name  */
-        new->mode = mode;
-        if (S_ISDIR(mode))
-                rwlock_init(&new->u.dir.lock);
-        atomic_set(&new->refcount, 1);
-        spin_lock(&counter_lock);
-        new->inode.ino = inode_counter++;
-        spin_unlock(&counter_lock);
-        if (name)
-                memcpy(new->name, name, namelen);
-        new->namelen = namelen;
-        WRITE_ENTRY_MAGIC(new, MAGIC_VALUE);
-#ifdef CONFIG_DEVFS_DEBUG
-        spin_lock(&stat_lock);
-        ++stat_num_entries;
-        stat_num_bytes += sizeof *new + namelen;
-        spin_unlock(&stat_lock);
-#endif
-        return new;
-}                               /*  End Function _devfs_alloc_entry  */
-/**
- *      _devfs_append_entry - Append a devfs entry to a directory's child list.
- *      @dir:  The directory to add to.
- *      @de:  The devfs entry to append.
- *      @old_de: If an existing entry exists, it will be written here. This may
- *               be %NULL. An implicit devfs_get() is performed on this entry.
- *
- *  Append a devfs entry to a directory's list of children, checking first to
- *   see if an entry of the same name exists. The directory will be locked.
- *   The value 0 is returned on success, else a negative error code.
- *   On failure, an implicit devfs_put() is performed on %de.
- */
-static int _devfs_append_entry(devfs_handle_t dir, devfs_handle_t de,
-                               devfs_handle_t * old_de)
-{
-        int retval;
-        if (old_de)
-                *old_de = NULL;
-        if (!S_ISDIR(dir->mode)) {
-                PRINTK("(%s): dir: \"%s\" is not a directory\n", de->name,
-                       dir->name);
-                devfs_put(de);
-                return -ENOTDIR;
-        }
-        write_lock(&dir->u.dir.lock);
-        if (dir->u.dir.no_more_additions)
-                retval = -ENOENT;
-        else {
-                struct devfs_entry *old;
-                old = _devfs_search_dir(dir, de->name, de->namelen);
-                if (old_de)
-                        *old_de = old;
-                else
-                        devfs_put(old);
-                if (old == NULL) {
-                        de->parent = dir;
-                        de->prev = dir->u.dir.last;
-                        /*  Append to the directory's list of children  */
-                        if (dir->u.dir.first == NULL)
-                                dir->u.dir.first = de;
-                        else
-                                dir->u.dir.last->next = de;
-                        dir->u.dir.last = de;
-                        retval = 0;
-                } else
-                        retval = -EEXIST;
-        }
-        write_unlock(&dir->u.dir.lock);
-        if (retval)
-                devfs_put(de);
-        return retval;
-}                               /*  End Function _devfs_append_entry  */
-/**
- *      _devfs_get_root_entry - Get the root devfs entry.
- *
- *      Returns the root devfs entry on success, else %NULL.
- *
- *      TODO it must be called asynchronously due to the fact
- *      that devfs is initialized relatively late. Proper way
- *      is to remove module_init from init_devfs_fs and manually
- *      call it early enough during system init
- */
-static struct devfs_entry *_devfs_get_root_entry(void)
-{
-        struct devfs_entry *new;
-        static DEFINE_SPINLOCK(root_lock);
-        if (root_entry)
-                return root_entry;
-        new = _devfs_alloc_entry(NULL, 0, MODE_DIR);
-        if (new == NULL)
-                return NULL;
-        spin_lock(&root_lock);
-        if (root_entry) {
-                spin_unlock(&root_lock);
-                devfs_put(new);
-                return root_entry;
-        }
-        root_entry = new;
-        spin_unlock(&root_lock);
-        return root_entry;
-}                               /*  End Function _devfs_get_root_entry  */
-/**
- *      _devfs_descend - Descend down a tree using the next component name.
- *      @dir:  The directory to search.
- *      @name:  The component name to search for.
- *      @namelen:  The length of %name.
- *      @next_pos:  The position of the next '/' or '\0' is written here.
- *
- *  Descend into a directory, searching for a component. This function forms
- *   the core of a tree-walking algorithm. The directory will be locked.
- *   The devfs entry corresponding to the component is returned. If there is
- *   no matching entry, %NULL is returned.
- *   An implicit devfs_get() is performed on the returned entry.
- */
-static struct devfs_entry *_devfs_descend(struct devfs_entry *dir,
-                                          const char *name, int namelen,
-                                          int *next_pos)
-{
-        const char *stop, *ptr;
-        struct devfs_entry *entry;
-        if ((namelen >= 3) && (strncmp(name, "../", 3) == 0)) { /*  Special-case going to parent directory  */
-                *next_pos = 3;
-                return devfs_get(dir->parent);
-        }
-        stop = name + namelen;
-        /*  Search for a possible '/'  */
-        for (ptr = name; (ptr < stop) && (*ptr != '/'); ++ptr) ;
-        *next_pos = ptr - name;
-        read_lock(&dir->u.dir.lock);
-        entry = _devfs_search_dir(dir, name, *next_pos);
-        read_unlock(&dir->u.dir.lock);
-        return entry;
-}                               /*  End Function _devfs_descend  */
-static devfs_handle_t _devfs_make_parent_for_leaf(struct devfs_entry *dir,
-                                                  const char *name,
-                                                  int namelen, int *leaf_pos)
-{
-        int next_pos = 0;
-        if (dir == NULL)
-                dir = _devfs_get_root_entry();
-        if (dir == NULL)
-                return NULL;
-        devfs_get(dir);
-        /*  Search for possible trailing component and ignore it  */
-        for (--namelen; (namelen > 0) && (name[namelen] != '/'); --namelen) ;
-        *leaf_pos = (name[namelen] == '/') ? (namelen + 1) : 0;
-        for (; namelen > 0; name += next_pos, namelen -= next_pos) {
-                struct devfs_entry *de, *old = NULL;
-                if ((de =
-                     _devfs_descend(dir, name, namelen, &next_pos)) == NULL) {
-                        de = _devfs_alloc_entry(name, next_pos, MODE_DIR);
-                        devfs_get(de);
-                        if (!de || _devfs_append_entry(dir, de, &old)) {
-                                devfs_put(de);
-                                if (!old || !S_ISDIR(old->mode)) {
-                                        devfs_put(old);
-                                        devfs_put(dir);
-                                        return NULL;
-                                }
-                                de = old;       /*  Use the existing directory  */
-                        }
-                }
-                if (de == dir->parent) {
-                        devfs_put(dir);
-                        devfs_put(de);
-                        return NULL;
-                }
-                devfs_put(dir);
-                dir = de;
-                if (name[next_pos] == '/')
-                        ++next_pos;
-        }
-        return dir;
-}                               /*  End Function _devfs_make_parent_for_leaf  */
-static devfs_handle_t _devfs_prepare_leaf(devfs_handle_t * dir,
-                                          const char *name, umode_t mode)
-{
-        int namelen, leaf_pos;
-        struct devfs_entry *de;
-        namelen = strlen(name);
-        if ((*dir = _devfs_make_parent_for_leaf(*dir, name, namelen,
-                                                &leaf_pos)) == NULL) {
-                PRINTK("(%s): could not create parent path\n", name);
-                return NULL;
-        }
-        if ((de = _devfs_alloc_entry(name + leaf_pos, namelen - leaf_pos, mode))
-            == NULL) {
-                PRINTK("(%s): could not allocate entry\n", name);
-                devfs_put(*dir);
-                return NULL;
-        }
-        return de;
-}                               /*  End Function _devfs_prepare_leaf  */
-static devfs_handle_t _devfs_walk_path(struct devfs_entry *dir,
-                                       const char *name, int namelen,
-                                       int traverse_symlink)
-{
-        int next_pos = 0;
-        if (dir == NULL)
-                dir = _devfs_get_root_entry();
-        if (dir == NULL)
-                return NULL;
-        devfs_get(dir);
-        for (; namelen > 0; name += next_pos, namelen -= next_pos) {
-                struct devfs_entry *de, *link;
-                if (!S_ISDIR(dir->mode)) {
-                        devfs_put(dir);
-                        return NULL;
-                }
-                if ((de =
-                     _devfs_descend(dir, name, namelen, &next_pos)) == NULL) {
-                        devfs_put(dir);
-                        return NULL;
-                }
-                if (S_ISLNK(de->mode) && traverse_symlink) {    /*  Need to follow the link: this is a stack chomper  */
-                        /* FIXME what if it puts outside of mounted tree? */
-                        link = _devfs_walk_path(dir, de->u.symlink.linkname,
-                                                de->u.symlink.length, TRUE);
-                        devfs_put(de);
-                        if (!link) {
-                                devfs_put(dir);
-                                return NULL;
-                        }
-                        de = link;
-                }
-                devfs_put(dir);
-                dir = de;
-                if (name[next_pos] == '/')
-                        ++next_pos;
-        }
-        return dir;
-}                               /*  End Function _devfs_walk_path  */
-/**
- *      _devfs_find_entry - Find a devfs entry.
- *      @dir: The handle to the parent devfs directory entry. If this is %NULL the
- *              name is relative to the root of the devfs.
- *      @name: The name of the entry. This may be %NULL.
- *      @traverse_symlink: If %TRUE then symbolic links are traversed.
- *
- *      Returns the devfs_entry pointer on success, else %NULL. An implicit
- *      devfs_get() is performed.
- */
-static struct devfs_entry *_devfs_find_entry(devfs_handle_t dir,
-                                             const char *name,
-                                             int traverse_symlink)
-{
-        unsigned int namelen = strlen(name);
-        if (name[0] == '/') {
-                /*  Skip leading pathname component  */
-                if (namelen < 2) {
-                        PRINTK("(%s): too short\n", name);
-                        return NULL;
-                }
-                for (++name, --namelen; (*name != '/') && (namelen > 0);
-                     ++name, --namelen) ;
-                if (namelen < 2) {
-                        PRINTK("(%s): too short\n", name);
-                        return NULL;
-                }
-                ++name;
-                --namelen;
-        }
-        return _devfs_walk_path(dir, name, namelen, traverse_symlink);
-}                               /*  End Function _devfs_find_entry  */
-static struct devfs_entry *get_devfs_entry_from_vfs_inode(struct inode *inode)
-{
-        if (inode == NULL)
-                return NULL;
-        VERIFY_ENTRY((struct devfs_entry *)inode->u.generic_ip);
-        return inode->u.generic_ip;
-}                               /*  End Function get_devfs_entry_from_vfs_inode  */
-/**
- *      free_dentry - Free the dentry for a device entry and invalidate inode.
- *      @de: The entry.
- *
- *      This must only be called after the entry has been unhooked from its
- *       parent directory.
- */
-static void free_dentry(struct devfs_entry *de)
-{
-        struct dentry *dentry = de->inode.dentry;
-        if (!dentry)
-                return;
-        spin_lock(&dcache_lock);
-        dget_locked(dentry);
-        spin_unlock(&dcache_lock);
-        /*  Forcefully remove the inode  */
-        if (dentry->d_inode != NULL)
-                dentry->d_inode->i_nlink = 0;
-        d_drop(dentry);
-        dput(dentry);
-}                               /*  End Function free_dentry  */
-/**
- *      is_devfsd_or_child - Test if the current process is devfsd or one of its children.
- *      @fs_info: The filesystem information.
- *
- *      Returns %TRUE if devfsd or child, else %FALSE.
- */
-static int is_devfsd_or_child(struct fs_info *fs_info)
-{
-        struct task_struct *p = current;
-        if (p == fs_info->devfsd_task)
-                return (TRUE);
-        if (process_group(p) == fs_info->devfsd_pgrp)
-                return (TRUE);
-        read_lock(&tasklist_lock);
-        for (; p != &init_task; p = p->real_parent) {
-                if (p == fs_info->devfsd_task) {
-                        read_unlock(&tasklist_lock);
-                        return (TRUE);
-                }
-        }
-        read_unlock(&tasklist_lock);
-        return (FALSE);
-}                               /*  End Function is_devfsd_or_child  */
-/**
- *      devfsd_queue_empty - Test if devfsd has work pending in its event queue.
- *      @fs_info: The filesystem information.
- *
- *      Returns %TRUE if the queue is empty, else %FALSE.
- */
-static inline int devfsd_queue_empty(struct fs_info *fs_info)
-{
-        return (fs_info->devfsd_last_event) ? FALSE : TRUE;
-}                               /*  End Function devfsd_queue_empty  */
-/**
- *      wait_for_devfsd_finished - Wait for devfsd to finish processing its event queue.
- *      @fs_info: The filesystem information.
- *
- *      Returns %TRUE if no more waiting will be required, else %FALSE.
- */
-static int wait_for_devfsd_finished(struct fs_info *fs_info)
-{
-        DECLARE_WAITQUEUE(wait, current);
-        if (fs_info->devfsd_task == NULL)
-                return (TRUE);
-        if (devfsd_queue_empty(fs_info) && fs_info->devfsd_sleeping)
-                return TRUE;
-        if (is_devfsd_or_child(fs_info))
-                return (FALSE);
-        set_current_state(TASK_UNINTERRUPTIBLE);
-        add_wait_queue(&fs_info->revalidate_wait_queue, &wait);
-        if (!devfsd_queue_empty(fs_info) || !fs_info->devfsd_sleeping)
-                if (fs_info->devfsd_task)
-                        schedule();
-        remove_wait_queue(&fs_info->revalidate_wait_queue, &wait);
-        __set_current_state(TASK_RUNNING);
-        return (TRUE);
-}                               /*  End Function wait_for_devfsd_finished  */
-/**
- *      devfsd_notify_de - Notify the devfsd daemon of a change.
- *      @de: The devfs entry that has changed. This and all parent entries will
- *            have their reference counts incremented if the event was queued.
- *      @type: The type of change.
- *      @mode: The mode of the entry.
- *      @uid: The user ID.
- *      @gid: The group ID.
- *      @fs_info: The filesystem info.
- *
- *      Returns %TRUE if an event was queued and devfsd woken up, else %FALSE.
- */
-static int devfsd_notify_de(struct devfs_entry *de,
-                            unsigned short type, umode_t mode,
-                            uid_t uid, gid_t gid, struct fs_info *fs_info)
-{
-        struct devfsd_buf_entry *entry;
-        struct devfs_entry *curr;
-        if (!(fs_info->devfsd_event_mask & (1 << type)))
-                return (FALSE);
-        if ((entry = kmem_cache_alloc(devfsd_buf_cache, SLAB_KERNEL)) == NULL) {
-                atomic_inc(&fs_info->devfsd_overrun_count);
-                return (FALSE);
-        }
-        for (curr = de; curr != NULL; curr = curr->parent)
-                devfs_get(curr);
-        entry->de = de;
-        entry->type = type;
-        entry->mode = mode;
-        entry->uid = uid;
-        entry->gid = gid;
-        entry->next = NULL;
-        spin_lock(&fs_info->devfsd_buffer_lock);
-        if (!fs_info->devfsd_first_event)
-                fs_info->devfsd_first_event = entry;
-        if (fs_info->devfsd_last_event)
-                fs_info->devfsd_last_event->next = entry;
-        fs_info->devfsd_last_event = entry;
-        spin_unlock(&fs_info->devfsd_buffer_lock);
-        wake_up_interruptible(&fs_info->devfsd_wait_queue);
-        return (TRUE);
-}                               /*  End Function devfsd_notify_de  */
-/**
- *      devfsd_notify - Notify the devfsd daemon of a change.
- *      @de: The devfs entry that has changed.
- *      @type: The type of change event.
- *      @wait: If TRUE, the function waits for the daemon to finish processing
- *              the event.
- */
-static void devfsd_notify(struct devfs_entry *de, unsigned short type)
-{
-        devfsd_notify_de(de, type, de->mode, current->euid,
-                         current->egid, &fs_info);
-}
-static int devfs_mk_dev(dev_t dev, umode_t mode, const char *fmt, va_list args)
-{
-        struct devfs_entry *dir = NULL, *de;
-        char buf[64];
-        int error, n;
-        n = vsnprintf(buf, sizeof(buf), fmt, args);
-        if (n >= sizeof(buf) || !buf[0]) {
-                printk(KERN_WARNING "%s: invalid format string %s\n",
-                       __FUNCTION__, fmt);
-                return -EINVAL;
-        }
-        de = _devfs_prepare_leaf(&dir, buf, mode);
-        if (!de) {
-                printk(KERN_WARNING "%s: could not prepare leaf for %s\n",
-                       __FUNCTION__, buf);
-                return -ENOMEM; /* could be more accurate... */
-        }
-        de->u.dev = dev;
-        error = _devfs_append_entry(dir, de, NULL);
-        if (error) {
-                printk(KERN_WARNING "%s: could not append to parent for %s\n",
-                       __FUNCTION__, buf);
-                goto out;
-        }
-        devfsd_notify(de, DEVFSD_NOTIFY_REGISTERED);
-      out:
-        devfs_put(dir);
-        return error;
-}
-int devfs_mk_bdev(dev_t dev, umode_t mode, const char *fmt, ...)
-{
-        va_list args;
-        if (!S_ISBLK(mode)) {
-                printk(KERN_WARNING "%s: invalide mode (%u) for %s\n",
-                       __FUNCTION__, mode, fmt);
-                return -EINVAL;
-        }
-        va_start(args, fmt);
-        return devfs_mk_dev(dev, mode, fmt, args);
-}
-EXPORT_SYMBOL(devfs_mk_bdev);
-int devfs_mk_cdev(dev_t dev, umode_t mode, const char *fmt, ...)
-{
-        va_list args;
-        if (!S_ISCHR(mode)) {
-                printk(KERN_WARNING "%s: invalide mode (%u) for %s\n",
-                       __FUNCTION__, mode, fmt);
-                return -EINVAL;
-        }
-        va_start(args, fmt);
-        return devfs_mk_dev(dev, mode, fmt, args);
-}
-EXPORT_SYMBOL(devfs_mk_cdev);
-/**
- *      _devfs_unhook - Unhook a device entry from its parents list
- *      @de: The entry to unhook.
- *
- *      Returns %TRUE if the entry was unhooked, else %FALSE if it was
- *              previously unhooked.
- *      The caller must have a write lock on the parent directory.
- */
-static int _devfs_unhook(struct devfs_entry *de)
-{
-        struct devfs_entry *parent;
-        if (!de || (de->prev == de))
-                return FALSE;
-        parent = de->parent;
-        if (de->prev == NULL)
-                parent->u.dir.first = de->next;
-        else
-                de->prev->next = de->next;
-        if (de->next == NULL)
-                parent->u.dir.last = de->prev;
-        else
-                de->next->prev = de->prev;
-        de->prev = de;          /*  Indicate we're unhooked                      */
-        de->next = NULL;        /*  Force early termination for <devfs_readdir>  */
-        return TRUE;
-}                               /*  End Function _devfs_unhook  */
-/**
- *      _devfs_unregister - Unregister a device entry from its parent.
- *      @dir: The parent directory.
- *      @de: The entry to unregister.
- *
- *      The caller must have a write lock on the parent directory, which is
- *      unlocked by this function.
- */
-static void _devfs_unregister(struct devfs_entry *dir, struct devfs_entry *de)
-{
-        int unhooked = _devfs_unhook(de);
-        write_unlock(&dir->u.dir.lock);
-        if (!unhooked)
-                return;
-        devfs_get(dir);
-        devfsd_notify(de, DEVFSD_NOTIFY_UNREGISTERED);
-        free_dentry(de);
-        devfs_put(dir);
-        if (!S_ISDIR(de->mode))
-                return;
-        while (TRUE) {          /*  Recursively unregister: this is a stack chomper  */
-                struct devfs_entry *child;
-                write_lock(&de->u.dir.lock);
-                de->u.dir.no_more_additions = TRUE;
-                child = de->u.dir.first;
-                VERIFY_ENTRY(child);
-                _devfs_unregister(de, child);
-                if (!child)
-                        break;
-                DPRINTK(DEBUG_UNREGISTER, "(%s): child: %p  refcount: %d\n",
-                        child->name, child, atomic_read(&child->refcount));
-                devfs_put(child);
-        }
-}                               /*  End Function _devfs_unregister  */
-static int devfs_do_symlink(devfs_handle_t dir, const char *name,
-                            const char *link, devfs_handle_t * handle)
-{
-        int err;
-        unsigned int linklength;
-        char *newlink;
-        struct devfs_entry *de;
-        if (handle != NULL)
-                *handle = NULL;
-        if (name == NULL) {
-                PRINTK("(): NULL name pointer\n");
-                return -EINVAL;
-        }
-        if (link == NULL) {
-                PRINTK("(%s): NULL link pointer\n", name);
-                return -EINVAL;
-        }
-        linklength = strlen(link);
-        if ((newlink = kmalloc(linklength + 1, GFP_KERNEL)) == NULL)
-                return -ENOMEM;
-        memcpy(newlink, link, linklength);
-        newlink[linklength] = '\0';
-        if ((de = _devfs_prepare_leaf(&dir, name, S_IFLNK | S_IRUGO | S_IXUGO))
-            == NULL) {
-                PRINTK("(%s): could not prepare leaf\n", name);
-                kfree(newlink);
-                return -ENOTDIR;
-        }
-        de->info = NULL;
-        de->u.symlink.linkname = newlink;
-        de->u.symlink.length = linklength;
-        if ((err = _devfs_append_entry(dir, de, NULL)) != 0) {
-                PRINTK("(%s): could not append to parent, err: %d\n", name,
-                       err);
-                devfs_put(dir);
-                return err;
-        }
-        devfs_put(dir);
-#ifdef CONFIG_DEVFS_DEBUG
-        spin_lock(&stat_lock);
-        stat_num_bytes += linklength + 1;
-        spin_unlock(&stat_lock);
-#endif
-        if (handle != NULL)
-                *handle = de;
-        return 0;
-}                               /*  End Function devfs_do_symlink  */
-/**
- *      devfs_mk_symlink Create a symbolic link in the devfs namespace.
- *      @from: The name of the entry.
- *      @to: Name of the destination
- *
- *      Returns 0 on success, else a negative error code is returned.
- */
-int devfs_mk_symlink(const char *from, const char *to)
-{
-        devfs_handle_t de;
-        int err;
-        err = devfs_do_symlink(NULL, from, to, &de);
-        if (!err) {
-                de->vfs = TRUE;
-                devfsd_notify(de, DEVFSD_NOTIFY_REGISTERED);
-        }
-        return err;
-}
-/**
- *      devfs_mk_dir - Create a directory in the devfs namespace.
- *              new name is relative to the root of the devfs.
- *      @fmt: The name of the entry.
- *
- *      Use of this function is optional. The devfs_register() function
- *      will automatically create intermediate directories as needed. This function
- *      is provided for efficiency reasons, as it provides a handle to a directory.
- *      On failure %NULL is returned.
- */
-int devfs_mk_dir(const char *fmt, ...)
-{
-        struct devfs_entry *dir = NULL, *de = NULL, *old;
-        char buf[64];
-        va_list args;
-        int error, n;
-        va_start(args, fmt);
-        n = vsnprintf(buf, 64, fmt, args);
-        if (n >= 64 || !buf[0]) {
-                printk(KERN_WARNING "%s: invalid argument.", __FUNCTION__);
-                return -EINVAL;
-        }
-        de = _devfs_prepare_leaf(&dir, buf, MODE_DIR);
-        if (!de) {
-                PRINTK("(%s): could not prepare leaf\n", buf);
-                return -EINVAL;
-        }
-        error = _devfs_append_entry(dir, de, &old);
-        if (error == -EEXIST && S_ISDIR(old->mode)) {
-                /*
-                 * devfs_mk_dir() of an already-existing directory will
-                 * return success.
-                 */
-                error = 0;
-                goto out_put;
-        } else if (error) {
-                PRINTK("(%s): could not append to dir: %p \"%s\"\n",
-                       buf, dir, dir->name);
-                devfs_put(old);
-                goto out_put;
-        }
-        devfsd_notify(de, DEVFSD_NOTIFY_REGISTERED);
-      out_put:
-        devfs_put(dir);
-        return error;
-}
-void devfs_remove(const char *fmt, ...)
-{
-        char buf[64];
-        va_list args;
-        int n;
-        va_start(args, fmt);
-        n = vsnprintf(buf, sizeof(buf), fmt, args);
-        if (n < sizeof(buf) && buf[0]) {
-                devfs_handle_t de = _devfs_find_entry(NULL, buf, 0);
-                if (!de) {
-                        printk(KERN_ERR "%s: %s not found, cannot remove\n",
-                               __FUNCTION__, buf);
-                        dump_stack();
-                        return;
-                }
-                write_lock(&de->parent->u.dir.lock);
-                _devfs_unregister(de->parent, de);
-                devfs_put(de);
-                devfs_put(de);
-        }
-}
-/**
- *      devfs_generate_path - Generate a pathname for an entry, relative to the devfs root.
- *      @de: The devfs entry.
- *      @path: The buffer to write the pathname to. The pathname and '\0'
- *              terminator will be written at the end of the buffer.
- *      @buflen: The length of the buffer.
- *
- *      Returns the offset in the buffer where the pathname starts on success,
- *      else a negative error code.
- */
-static int devfs_generate_path(devfs_handle_t de, char *path, int buflen)
-{
-        int pos;
-#define NAMEOF(de) ( (de)->mode ? (de)->name : (de)->u.name )
-        if (de == NULL)
-                return -EINVAL;
-        VERIFY_ENTRY(de);
-        if (de->namelen >= buflen)
-                return -ENAMETOOLONG;   /*  Must be first       */
-        path[buflen - 1] = '\0';
-        if (de->parent == NULL)
-                return buflen - 1;      /*  Don't prepend root  */
-        pos = buflen - de->namelen - 1;
-        memcpy(path + pos, NAMEOF(de), de->namelen);
-        for (de = de->parent; de->parent != NULL; de = de->parent) {
-                if (pos - de->namelen - 1 < 0)
-                        return -ENAMETOOLONG;
-                path[--pos] = '/';
-                pos -= de->namelen;
-                memcpy(path + pos, NAMEOF(de), de->namelen);
-        }
-        return pos;
-}                               /*  End Function devfs_generate_path  */
-/**
- *      devfs_setup - Process kernel boot options.
- *      @str: The boot options after the "devfs=".
- */
-static int __init devfs_setup(char *str)
-{
-        static struct {
-                char *name;
-                unsigned int mask;
-                unsigned int *opt;
-        } devfs_options_tab[] __initdata = {
-#ifdef CONFIG_DEVFS_DEBUG
-                {
-                "dall", DEBUG_ALL, &devfs_debug_init}, {
-                "dmod", DEBUG_MODULE_LOAD, &devfs_debug_init}, {
-                "dreg", DEBUG_REGISTER, &devfs_debug_init}, {
-                "dunreg", DEBUG_UNREGISTER, &devfs_debug_init}, {
-                "dfree", DEBUG_FREE, &devfs_debug_init}, {
-                "diget", DEBUG_I_GET, &devfs_debug_init}, {
-                "dchange", DEBUG_SET_FLAGS, &devfs_debug_init}, {
-                "dsread", DEBUG_S_READ, &devfs_debug_init}, {
-                "dichange", DEBUG_I_CHANGE, &devfs_debug_init}, {
-                "dimknod", DEBUG_I_MKNOD, &devfs_debug_init}, {
-                "dilookup", DEBUG_I_LOOKUP, &devfs_debug_init}, {
-                "diunlink", DEBUG_I_UNLINK, &devfs_debug_init},
-#endif                          /*  CONFIG_DEVFS_DEBUG  */
-                {
-                "mount", OPTION_MOUNT, &boot_options}, {
-                NULL, 0, NULL}
-        };
-        while ((*str != '\0') && !isspace(*str)) {
-                int i, found = 0, invert = 0;
-                if (strncmp(str, "no", 2) == 0) {
-                        invert = 1;
-                        str += 2;
-                }
-                for (i = 0; devfs_options_tab[i].name != NULL; i++) {
-                        int len = strlen(devfs_options_tab[i].name);
-                        if (strncmp(str, devfs_options_tab[i].name, len) == 0) {
-                                if (invert)
-                                        *devfs_options_tab[i].opt &=
-                                            ~devfs_options_tab[i].mask;
-                                else
-                                        *devfs_options_tab[i].opt |=
-                                            devfs_options_tab[i].mask;
-                                str += len;
-                                found = 1;
-                                break;
-                        }
-                }
-                if (!found)
-                        return 0;       /*  No match         */
-                if (*str != ',')
-                        return 0;       /*  No more options  */
-                ++str;
-        }
-        return 1;
-}                               /*  End Function devfs_setup  */
-__setup("devfs=", devfs_setup);
-EXPORT_SYMBOL(devfs_mk_dir);
-EXPORT_SYMBOL(devfs_remove);
-/**
- *      try_modload - Notify devfsd of an inode lookup by a non-devfsd process.
- *      @parent: The parent devfs entry.
- *      @fs_info: The filesystem info.
- *      @name: The device name.
- *      @namelen: The number of characters in @name.
- *      @buf: A working area that will be used. This must not go out of scope
- *            until devfsd is idle again.
- *
- *      Returns 0 on success (event was queued), else a negative error code.
- */
-static int try_modload(struct devfs_entry *parent, struct fs_info *fs_info,
-                       const char *name, unsigned namelen,
-                       struct devfs_entry *buf)
-{
-        if (!(fs_info->devfsd_event_mask & (1 << DEVFSD_NOTIFY_LOOKUP)))
-                return -ENOENT;
-        if (is_devfsd_or_child(fs_info))
-                return -ENOENT;
-        memset(buf, 0, sizeof *buf);
-        atomic_set(&buf->refcount, 1);
-        buf->parent = parent;
-        buf->namelen = namelen;
-        buf->u.name = name;
-        WRITE_ENTRY_MAGIC(buf, MAGIC_VALUE);
-        if (!devfsd_notify_de(buf, DEVFSD_NOTIFY_LOOKUP, 0,
-                              current->euid, current->egid, fs_info))
-                return -ENOENT;
-        /*  Possible success: event has been queued  */
-        return 0;
-}                               /*  End Function try_modload  */
-/*  Superblock operations follow  */
-static struct inode_operations devfs_iops;
-static struct inode_operations devfs_dir_iops;
-static const struct file_operations devfs_fops;
-static const struct file_operations devfs_dir_fops;
-static struct inode_operations devfs_symlink_iops;
-static int devfs_notify_change(struct dentry *dentry, struct iattr *iattr)
-{
-        int retval;
-        struct devfs_entry *de;
-        struct inode *inode = dentry->d_inode;
-        struct fs_info *fs_info = inode->i_sb->s_fs_info;
-        de = get_devfs_entry_from_vfs_inode(inode);
-        if (de == NULL)
-                return -ENODEV;
-        retval = inode_change_ok(inode, iattr);
-        if (retval != 0)
-                return retval;
-        retval = inode_setattr(inode, iattr);
-        if (retval != 0)
-                return retval;
-        DPRINTK(DEBUG_I_CHANGE, "(%d): VFS inode: %p  devfs_entry: %p\n",
-                (int)inode->i_ino, inode, de);
-        DPRINTK(DEBUG_I_CHANGE, "():   mode: 0%o  uid: %d  gid: %d\n",
-                (int)inode->i_mode, (int)inode->i_uid, (int)inode->i_gid);
-        /*  Inode is not on hash chains, thus must save permissions here rather
-           than in a write_inode() method  */
-        de->mode = inode->i_mode;
-        de->inode.uid = inode->i_uid;
-        de->inode.gid = inode->i_gid;
-        de->inode.atime = inode->i_atime;
-        de->inode.mtime = inode->i_mtime;
-        de->inode.ctime = inode->i_ctime;
-        if ((iattr->ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID)) &&
-            !is_devfsd_or_child(fs_info))
-                devfsd_notify_de(de, DEVFSD_NOTIFY_CHANGE, inode->i_mode,
-                                 inode->i_uid, inode->i_gid, fs_info);
-        return 0;
-}                               /*  End Function devfs_notify_change  */
-static struct super_operations devfs_sops = {
-        .drop_inode = generic_delete_inode,
-        .statfs = simple_statfs,
-};
-/**
- *      _devfs_get_vfs_inode - Get a VFS inode.
- *      @sb: The super block.
- *      @de: The devfs inode.
- *      @dentry: The dentry to register with the devfs inode.
- *
- *      Returns the inode on success, else %NULL. An implicit devfs_get() is
- *       performed if the inode is created.
- */
-static struct inode *_devfs_get_vfs_inode(struct super_block *sb,
-                                          struct devfs_entry *de,
-                                          struct dentry *dentry)
-{
-        struct inode *inode;
-        if (de->prev == de)
-                return NULL;    /*  Quick check to see if unhooked  */
-        if ((inode = new_inode(sb)) == NULL) {
-                PRINTK("(%s): new_inode() failed, de: %p\n", de->name, de);
-                return NULL;
-        }
-        if (de->parent) {
-                read_lock(&de->parent->u.dir.lock);
-                if (de->prev != de)
-                        de->inode.dentry = dentry;      /*      Not unhooked  */
-                read_unlock(&de->parent->u.dir.lock);
-        } else
-                de->inode.dentry = dentry;      /*  Root: no locking needed  */
-        if (de->inode.dentry != dentry) {       /*  Must have been unhooked  */
-                iput(inode);
-                return NULL;
-        }
-        /* FIXME where is devfs_put? */
-        inode->u.generic_ip = devfs_get(de);
-        inode->i_ino = de->inode.ino;
-        DPRINTK(DEBUG_I_GET, "(%d): VFS inode: %p  devfs_entry: %p\n",
-                (int)inode->i_ino, inode, de);
-        inode->i_blocks = 0;
-        inode->i_blksize = FAKE_BLOCK_SIZE;
-        inode->i_op = &devfs_iops;
-        inode->i_mode = de->mode;
-        if (S_ISDIR(de->mode)) {
-                inode->i_op = &devfs_dir_iops;
-                inode->i_fop = &devfs_dir_fops;
-        } else if (S_ISLNK(de->mode)) {
-                inode->i_op = &devfs_symlink_iops;
-                inode->i_size = de->u.symlink.length;
-        } else if (S_ISCHR(de->mode) || S_ISBLK(de->mode)) {
-                init_special_inode(inode, de->mode, de->u.dev);
-        } else if (S_ISFIFO(de->mode) || S_ISSOCK(de->mode)) {
-                init_special_inode(inode, de->mode, 0);
-        } else {
-                PRINTK("(%s): unknown mode %o de: %p\n",
-                       de->name, de->mode, de);
-                iput(inode);
-                devfs_put(de);
-                return NULL;
-        }
-        inode->i_uid = de->inode.uid;
-        inode->i_gid = de->inode.gid;
-        inode->i_atime = de->inode.atime;
-        inode->i_mtime = de->inode.mtime;
-        inode->i_ctime = de->inode.ctime;
-        DPRINTK(DEBUG_I_GET, "():   mode: 0%o  uid: %d  gid: %d\n",
-                (int)inode->i_mode, (int)inode->i_uid, (int)inode->i_gid);
-        return inode;
-}                               /*  End Function _devfs_get_vfs_inode  */
-/*  File operations for device entries follow  */
-static int devfs_readdir(struct file *file, void *dirent, filldir_t filldir)
-{
-        int err, count;
-        int stored = 0;
-        struct fs_info *fs_info;
-        struct devfs_entry *parent, *de, *next = NULL;
-        struct inode *inode = file->f_dentry->d_inode;
-        fs_info = inode->i_sb->s_fs_info;
-        parent = get_devfs_entry_from_vfs_inode(file->f_dentry->d_inode);
-        if ((long)file->f_pos < 0)
-                return -EINVAL;
-        DPRINTK(DEBUG_F_READDIR, "(%s): fs_info: %p  pos: %ld\n",
-                parent->name, fs_info, (long)file->f_pos);
-        switch ((long)file->f_pos) {
-        case 0:
-                err = (*filldir) (dirent, "..", 2, file->f_pos,
-                                  parent_ino(file->f_dentry), DT_DIR);
-                if (err == -EINVAL)
-                        break;
-                if (err < 0)
-                        return err;
-                file->f_pos++;
-                ++stored;
-                /*  Fall through  */
-        case 1:
-                err =
-                    (*filldir) (dirent, ".", 1, file->f_pos, inode->i_ino,
-                                DT_DIR);
-                if (err == -EINVAL)
-                        break;
-                if (err < 0)
-                        return err;
-                file->f_pos++;
-                ++stored;
-                /*  Fall through  */
-        default:
-                /*  Skip entries  */
-                count = file->f_pos - 2;
-                read_lock(&parent->u.dir.lock);
-                for (de = parent->u.dir.first; de && (count > 0); de = de->next)
-                        --count;
-                devfs_get(de);
-                read_unlock(&parent->u.dir.lock);
-                /*  Now add all remaining entries  */
-                while (de) {
-                        err = (*filldir) (dirent, de->name, de->namelen,
-                                          file->f_pos, de->inode.ino,
-                                          de->mode >> 12);
-                        if (err < 0)
-                                devfs_put(de);
-                        else {
-                                file->f_pos++;
-                                ++stored;
-                        }
-                        if (err == -EINVAL)
-                                break;
-                        if (err < 0)
-                                return err;
-                        read_lock(&parent->u.dir.lock);
-                        next = devfs_get(de->next);
-                        read_unlock(&parent->u.dir.lock);
-                        devfs_put(de);
-                        de = next;
-                }
-                break;
-        }
-        return stored;
-}                               /*  End Function devfs_readdir  */
-/* Open devfs specific special files */
-static int devfs_open(struct inode *inode, struct file *file)
-{
-        int err;
-        int minor = MINOR(inode->i_rdev);
-        struct file_operations *old_fops, *new_fops;
-        switch (minor) {
-        case 0:         /* /dev/.devfsd */
-                new_fops = fops_get(&devfsd_fops);
-                break;
-#ifdef CONFIG_DEVFS_DEBUG
-        case 1:         /* /dev/.stat */
-                new_fops = fops_get(&stat_fops);
-                break;
-#endif
-        default:
-                return -ENODEV;
-        }
-        if (new_fops == NULL)
-                return -ENODEV;
-        old_fops = file->f_op;
-        file->f_op = new_fops;
-        err = new_fops->open ? new_fops->open(inode, file) : 0;
-        if (err) {
-                file->f_op = old_fops;
-                fops_put(new_fops);
-        } else
-                fops_put(old_fops);
-        return err;
-}                               /*  End Function devfs_open  */
-static const struct file_operations devfs_fops = {
-        .open = devfs_open,
-};
-static const struct file_operations devfs_dir_fops = {
-        .read = generic_read_dir,
-        .readdir = devfs_readdir,
-};
-/*  Dentry operations for device entries follow  */
-/**
- *      devfs_d_release - Callback for when a dentry is freed.
- *      @dentry: The dentry.
- */
-static void devfs_d_release(struct dentry *dentry)
-{
-        DPRINTK(DEBUG_D_RELEASE, "(%p): inode: %p\n", dentry, dentry->d_inode);
-}                               /*  End Function devfs_d_release  */
-/**
- *      devfs_d_iput - Callback for when a dentry loses its inode.
- *      @dentry: The dentry.
- *      @inode: The inode.
- */
-static void devfs_d_iput(struct dentry *dentry, struct inode *inode)
-{
-        struct devfs_entry *de;
-        de = get_devfs_entry_from_vfs_inode(inode);
-        DPRINTK(DEBUG_D_IPUT,
-                "(%s): dentry: %p inode: %p de: %p de->dentry: %p\n", de->name,
-                dentry, inode, de, de->inode.dentry);
-        if (de->inode.dentry && (de->inode.dentry != dentry))
-                OOPS("(%s): de: %p dentry: %p de->dentry: %p\n",
-                     de->name, de, dentry, de->inode.dentry);
-        de->inode.dentry = NULL;
-        iput(inode);
-        devfs_put(de);
-}                               /*  End Function devfs_d_iput  */
-static int devfs_d_delete(struct dentry *dentry);
-static struct dentry_operations devfs_dops = {
-        .d_delete = devfs_d_delete,
-        .d_release = devfs_d_release,
-        .d_iput = devfs_d_iput,
-};
-static int devfs_d_revalidate_wait(struct dentry *dentry, struct nameidata *);
-static struct dentry_operations devfs_wait_dops = {
-        .d_delete = devfs_d_delete,
-        .d_release = devfs_d_release,
-        .d_iput = devfs_d_iput,
-        .d_revalidate = devfs_d_revalidate_wait,
-};
-/**
- *      devfs_d_delete - Callback for when all files for a dentry are closed.
- *      @dentry: The dentry.
- */
-static int devfs_d_delete(struct dentry *dentry)
-{
-        struct inode *inode = dentry->d_inode;
-        if (dentry->d_op == &devfs_wait_dops)
-                dentry->d_op = &devfs_dops;
-        /*  Unhash dentry if negative (has no inode)  */
-        if (inode == NULL) {
-                DPRINTK(DEBUG_D_DELETE, "(%p): dropping negative dentry\n",
-                        dentry);
-                return 1;
-        }
-        return 0;
-}                               /*  End Function devfs_d_delete  */
-struct devfs_lookup_struct {
-        devfs_handle_t de;
-        wait_queue_head_t wait_queue;
-};
-/* XXX: this doesn't handle the case where we got a negative dentry
-        but a devfs entry has been registered in the meanwhile */
-static int devfs_d_revalidate_wait(struct dentry *dentry, struct nameidata *nd)
-{
-        struct inode *dir = dentry->d_parent->d_inode;
-        struct fs_info *fs_info = dir->i_sb->s_fs_info;
-        devfs_handle_t parent = get_devfs_entry_from_vfs_inode(dir);
-        struct devfs_lookup_struct *lookup_info = dentry->d_fsdata;
-        DECLARE_WAITQUEUE(wait, current);
-        int need_lock;
-        /*
-         * FIXME HACK
-         *
-         * make sure that
-         *   d_instantiate always runs under lock
-         *   we release i_mutex lock before going to sleep
-         *
-         * unfortunately sometimes d_revalidate is called with
-         * and sometimes without i_mutex lock held. The following checks
-         * attempt to deduce when we need to add (and drop resp.) lock
-         * here. This relies on current (2.6.2) calling coventions:
-         *
-         *   lookup_hash is always run under i_mutex and is passing NULL
-         *   as nd
-         *
-         *   open(...,O_CREATE,...) calls _lookup_hash under i_mutex
-         *   and sets flags to LOOKUP_OPEN|LOOKUP_CREATE
-         *
-         *   all other invocations of ->d_revalidate seem to happen
-         *   outside of i_mutex
-         */
-        need_lock = nd &&
-            (!(nd->flags & LOOKUP_CREATE) || (nd->flags & LOOKUP_PARENT));
-        if (need_lock)
-                mutex_lock(&dir->i_mutex);
-        if (is_devfsd_or_child(fs_info)) {
-                devfs_handle_t de = lookup_info->de;
-                struct inode *inode;
-                DPRINTK(DEBUG_I_LOOKUP,
-                        "(%s): dentry: %p inode: %p de: %p by: \"%s\"\n",
-                        dentry->d_name.name, dentry, dentry->d_inode, de,
-                        current->comm);
-                if (dentry->d_inode)
-                        goto out;
-                if (de == NULL) {
-                        read_lock(&parent->u.dir.lock);
-                        de = _devfs_search_dir(parent, dentry->d_name.name,
-                                               dentry->d_name.len);
-                        read_unlock(&parent->u.dir.lock);
-                        if (de == NULL)
-                                goto out;
-                        lookup_info->de = de;
-                }
-                /*  Create an inode, now that the driver information is available  */
-                inode = _devfs_get_vfs_inode(dir->i_sb, de, dentry);
-                if (!inode)
-                        goto out;
-                DPRINTK(DEBUG_I_LOOKUP,
-                        "(%s): new VFS inode(%u): %p de: %p by: \"%s\"\n",
-                        de->name, de->inode.ino, inode, de, current->comm);
-                d_instantiate(dentry, inode);
-                goto out;
-        }
-        if (lookup_info == NULL)
-                goto out;       /*  Early termination  */
-        read_lock(&parent->u.dir.lock);
-        if (dentry->d_fsdata) {
-                set_current_state(TASK_UNINTERRUPTIBLE);
-                add_wait_queue(&lookup_info->wait_queue, &wait);
-                read_unlock(&parent->u.dir.lock);
-                /* at this point it is always (hopefully) locked */
-                mutex_unlock(&dir->i_mutex);
-                schedule();
-                mutex_lock(&dir->i_mutex);
-                /*
-                 * This does not need nor should remove wait from wait_queue.
-                 * Wait queue head is never reused - nothing is ever added to it
-                 * after all waiters have been waked up and head itself disappears
-                 * very soon after it. Moreover it is local variable on stack that
-                 * is likely to have already disappeared so any reference to it
-                 * at this point is buggy.
-                 */
-        } else
-                read_unlock(&parent->u.dir.lock);
-      out:
-        if (need_lock)
-                mutex_unlock(&dir->i_mutex);
-        return 1;
-}                               /*  End Function devfs_d_revalidate_wait  */
-/*  Inode operations for device entries follow  */
-static struct dentry *devfs_lookup(struct inode *dir, struct dentry *dentry,
-                                   struct nameidata *nd)
-{
-        struct devfs_entry tmp; /*  Must stay in scope until devfsd idle again  */
-        struct devfs_lookup_struct lookup_info;
-        struct fs_info *fs_info = dir->i_sb->s_fs_info;
-        struct devfs_entry *parent, *de;
-        struct inode *inode;
-        struct dentry *retval = NULL;
-        /*  Set up the dentry operations before anything else, to ensure cleaning
-           up on any error  */
-        dentry->d_op = &devfs_dops;
-        /*  First try to get the devfs entry for this directory  */
-        parent = get_devfs_entry_from_vfs_inode(dir);
-        DPRINTK(DEBUG_I_LOOKUP, "(%s): dentry: %p parent: %p by: \"%s\"\n",
-                dentry->d_name.name, dentry, parent, current->comm);
-        if (parent == NULL)
-                return ERR_PTR(-ENOENT);
-        read_lock(&parent->u.dir.lock);
-        de = _devfs_search_dir(parent, dentry->d_name.name, dentry->d_name.len);
-        read_unlock(&parent->u.dir.lock);
-        lookup_info.de = de;
-        init_waitqueue_head(&lookup_info.wait_queue);
-        dentry->d_fsdata = &lookup_info;
-        if (de == NULL) {       /*  Try with devfsd. For any kind of failure, leave a negative dentry
-                                   so someone else can deal with it (in the case where the sysadmin
-                                   does a mknod()). It's important to do this before hashing the
-                                   dentry, so that the devfsd queue is filled before revalidates
-                                   can start  */
-                if (try_modload(parent, fs_info, dentry->d_name.name, dentry->d_name.len, &tmp) < 0) {  /*  Lookup event was not queued to devfsd  */
-                        d_add(dentry, NULL);
-                        return NULL;
-                }
-        }
-        dentry->d_op = &devfs_wait_dops;
-        d_add(dentry, NULL);    /*  Open the floodgates  */
-        /*  Unlock directory semaphore, which will release any waiters. They
-           will get the hashed dentry, and may be forced to wait for
-           revalidation  */
-        mutex_unlock(&dir->i_mutex);
-        wait_for_devfsd_finished(fs_info);      /*  If I'm not devfsd, must wait  */
-        mutex_lock(&dir->i_mutex);      /*  Grab it again because them's the rules  */
-        de = lookup_info.de;
-        /*  If someone else has been so kind as to make the inode, we go home
-           early  */
-        if (dentry->d_inode)
-                goto out;
-        if (de == NULL) {
-                read_lock(&parent->u.dir.lock);
-                de = _devfs_search_dir(parent, dentry->d_name.name,
-                                       dentry->d_name.len);
-                read_unlock(&parent->u.dir.lock);
-                if (de == NULL)
-                        goto out;
-                /*  OK, there's an entry now, but no VFS inode yet  */
-        }
-        /*  Create an inode, now that the driver information is available  */
-        inode = _devfs_get_vfs_inode(dir->i_sb, de, dentry);
-        if (!inode) {
-                retval = ERR_PTR(-ENOMEM);
-                goto out;
-        }
-        DPRINTK(DEBUG_I_LOOKUP,
-                "(%s): new VFS inode(%u): %p de: %p by: \"%s\"\n", de->name,
-                de->inode.ino, inode, de, current->comm);
-        d_instantiate(dentry, inode);
-      out:
-        write_lock(&parent->u.dir.lock);
-        dentry->d_op = &devfs_dops;
-        dentry->d_fsdata = NULL;
-        wake_up(&lookup_info.wait_queue);
-        write_unlock(&parent->u.dir.lock);
-        devfs_put(de);
-        return retval;
-}                               /*  End Function devfs_lookup  */
-static int devfs_unlink(struct inode *dir, struct dentry *dentry)
-{
-        int unhooked;
-        struct devfs_entry *de;
-        struct inode *inode = dentry->d_inode;
-        struct fs_info *fs_info = dir->i_sb->s_fs_info;
-        de = get_devfs_entry_from_vfs_inode(inode);
-        DPRINTK(DEBUG_I_UNLINK, "(%s): de: %p\n", dentry->d_name.name, de);
-        if (de == NULL)
-                return -ENOENT;
-        if (!de->vfs)
-                return -EPERM;
-        write_lock(&de->parent->u.dir.lock);
-        unhooked = _devfs_unhook(de);
-        write_unlock(&de->parent->u.dir.lock);
-        if (!unhooked)
-                return -ENOENT;
-        if (!is_devfsd_or_child(fs_info))
-                devfsd_notify_de(de, DEVFSD_NOTIFY_DELETE, inode->i_mode,
-                                 inode->i_uid, inode->i_gid, fs_info);
-        free_dentry(de);
-        devfs_put(de);
-        return 0;
-}                               /*  End Function devfs_unlink  */
-static int devfs_symlink(struct inode *dir, struct dentry *dentry,
-                         const char *symname)
-{
-        int err;
-        struct fs_info *fs_info = dir->i_sb->s_fs_info;
-        struct devfs_entry *parent, *de;
-        struct inode *inode;
-        /*  First try to get the devfs entry for this directory  */
-        parent = get_devfs_entry_from_vfs_inode(dir);
-        if (parent == NULL)
-                return -ENOENT;
-        err = devfs_do_symlink(parent, dentry->d_name.name, symname, &de);
-        DPRINTK(DEBUG_DISABLED, "(%s): errcode from <devfs_do_symlink>: %d\n",
-                dentry->d_name.name, err);
-        if (err < 0)
-                return err;
-        de->vfs = TRUE;
-        de->inode.uid = current->euid;
-        de->inode.gid = current->egid;
-        de->inode.atime = CURRENT_TIME;
-        de->inode.mtime = CURRENT_TIME;
-        de->inode.ctime = CURRENT_TIME;
-        if ((inode = _devfs_get_vfs_inode(dir->i_sb, de, dentry)) == NULL)
-                return -ENOMEM;
-        DPRINTK(DEBUG_DISABLED, "(%s): new VFS inode(%u): %p  dentry: %p\n",
-                dentry->d_name.name, de->inode.ino, inode, dentry);
-        d_instantiate(dentry, inode);
-        if (!is_devfsd_or_child(fs_info))
-                devfsd_notify_de(de, DEVFSD_NOTIFY_CREATE, inode->i_mode,
-                                 inode->i_uid, inode->i_gid, fs_info);
-        return 0;
-}                               /*  End Function devfs_symlink  */
-static int devfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
-{
-        int err;
-        struct fs_info *fs_info = dir->i_sb->s_fs_info;
-        struct devfs_entry *parent, *de;
-        struct inode *inode;
-        mode = (mode & ~S_IFMT) | S_IFDIR;      /*  VFS doesn't pass S_IFMT part  */
-        parent = get_devfs_entry_from_vfs_inode(dir);
-        if (parent == NULL)
-                return -ENOENT;
-        de = _devfs_alloc_entry(dentry->d_name.name, dentry->d_name.len, mode);
-        if (!de)
-                return -ENOMEM;
-        de->vfs = TRUE;
-        if ((err = _devfs_append_entry(parent, de, NULL)) != 0)
-                return err;
-        de->inode.uid = current->euid;
-        de->inode.gid = current->egid;
-        de->inode.atime = CURRENT_TIME;
-        de->inode.mtime = CURRENT_TIME;
-        de->inode.ctime = CURRENT_TIME;
-        if ((inode = _devfs_get_vfs_inode(dir->i_sb, de, dentry)) == NULL)
-                return -ENOMEM;
-        DPRINTK(DEBUG_DISABLED, "(%s): new VFS inode(%u): %p  dentry: %p\n",
-                dentry->d_name.name, de->inode.ino, inode, dentry);
-        d_instantiate(dentry, inode);
-        if (!is_devfsd_or_child(fs_info))
-                devfsd_notify_de(de, DEVFSD_NOTIFY_CREATE, inode->i_mode,
-                                 inode->i_uid, inode->i_gid, fs_info);
-        return 0;
-}                               /*  End Function devfs_mkdir  */
-static int devfs_rmdir(struct inode *dir, struct dentry *dentry)
-{
-        int err = 0;
-        struct devfs_entry *de;
-        struct fs_info *fs_info = dir->i_sb->s_fs_info;
-        struct inode *inode = dentry->d_inode;
-        if (dir->i_sb->s_fs_info != inode->i_sb->s_fs_info)
-                return -EINVAL;
-        de = get_devfs_entry_from_vfs_inode(inode);
-        if (de == NULL)
-                return -ENOENT;
-        if (!S_ISDIR(de->mode))
-                return -ENOTDIR;
-        if (!de->vfs)
-                return -EPERM;
-        /*  First ensure the directory is empty and will stay that way  */
-        write_lock(&de->u.dir.lock);
-        if (de->u.dir.first)
-                err = -ENOTEMPTY;
-        else
-                de->u.dir.no_more_additions = TRUE;
-        write_unlock(&de->u.dir.lock);
-        if (err)
-                return err;
-        /*  Now unhook the directory from its parent  */
-        write_lock(&de->parent->u.dir.lock);
-        if (!_devfs_unhook(de))
-                err = -ENOENT;
-        write_unlock(&de->parent->u.dir.lock);
-        if (err)
-                return err;
-        if (!is_devfsd_or_child(fs_info))
-                devfsd_notify_de(de, DEVFSD_NOTIFY_DELETE, inode->i_mode,
-                                 inode->i_uid, inode->i_gid, fs_info);
-        free_dentry(de);
-        devfs_put(de);
-        return 0;
-}                               /*  End Function devfs_rmdir  */
-static int devfs_mknod(struct inode *dir, struct dentry *dentry, int mode,
-                       dev_t rdev)
-{
-        int err;
-        struct fs_info *fs_info = dir->i_sb->s_fs_info;
-        struct devfs_entry *parent, *de;
-        struct inode *inode;
-        DPRINTK(DEBUG_I_MKNOD, "(%s): mode: 0%o  dev: %u:%u\n",
-                dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
-        parent = get_devfs_entry_from_vfs_inode(dir);
-        if (parent == NULL)
-                return -ENOENT;
-        de = _devfs_alloc_entry(dentry->d_name.name, dentry->d_name.len, mode);
-        if (!de)
-                return -ENOMEM;
-        de->vfs = TRUE;
-        if (S_ISCHR(mode) || S_ISBLK(mode))
-                de->u.dev = rdev;
-        if ((err = _devfs_append_entry(parent, de, NULL)) != 0)
-                return err;
-        de->inode.uid = current->euid;
-        de->inode.gid = current->egid;
-        de->inode.atime = CURRENT_TIME;
-        de->inode.mtime = CURRENT_TIME;
-        de->inode.ctime = CURRENT_TIME;
-        if ((inode = _devfs_get_vfs_inode(dir->i_sb, de, dentry)) == NULL)
-                return -ENOMEM;
-        DPRINTK(DEBUG_I_MKNOD, ":   new VFS inode(%u): %p  dentry: %p\n",
-                de->inode.ino, inode, dentry);
-        d_instantiate(dentry, inode);
-        if (!is_devfsd_or_child(fs_info))
-                devfsd_notify_de(de, DEVFSD_NOTIFY_CREATE, inode->i_mode,
-                                 inode->i_uid, inode->i_gid, fs_info);
-        return 0;
-}                               /*  End Function devfs_mknod  */
-static void *devfs_follow_link(struct dentry *dentry, struct nameidata *nd)
-{
-        struct devfs_entry *p = get_devfs_entry_from_vfs_inode(dentry->d_inode);
-        nd_set_link(nd, p ? p->u.symlink.linkname : ERR_PTR(-ENODEV));
-        return NULL;
-}                               /*  End Function devfs_follow_link  */
-static struct inode_operations devfs_iops = {
-        .setattr = devfs_notify_change,
-};
-static struct inode_operations devfs_dir_iops = {
-        .lookup = devfs_lookup,
-        .unlink = devfs_unlink,
-        .symlink = devfs_symlink,
-        .mkdir = devfs_mkdir,
-        .rmdir = devfs_rmdir,
-        .mknod = devfs_mknod,
-        .setattr = devfs_notify_change,
-};
-static struct inode_operations devfs_symlink_iops = {
-        .readlink = generic_readlink,
-        .follow_link = devfs_follow_link,
-        .setattr = devfs_notify_change,
-};
-static int devfs_fill_super(struct super_block *sb, void *data, int silent)
-{
-        struct inode *root_inode = NULL;
-        if (_devfs_get_root_entry() == NULL)
-                goto out_no_root;
-        atomic_set(&fs_info.devfsd_overrun_count, 0);
-        init_waitqueue_head(&fs_info.devfsd_wait_queue);
-        init_waitqueue_head(&fs_info.revalidate_wait_queue);
-        fs_info.sb = sb;
-        sb->s_fs_info = &fs_info;
-        sb->s_blocksize = 1024;
-        sb->s_blocksize_bits = 10;
-        sb->s_magic = DEVFS_SUPER_MAGIC;
-        sb->s_op = &devfs_sops;
-        sb->s_time_gran = 1;
-        if ((root_inode = _devfs_get_vfs_inode(sb, root_entry, NULL)) == NULL)
-                goto out_no_root;
-        sb->s_root = d_alloc_root(root_inode);
-        if (!sb->s_root)
-                goto out_no_root;
-        DPRINTK(DEBUG_S_READ, "(): made devfs ptr: %p\n", sb->s_fs_info);
-        return 0;
-      out_no_root:
-        PRINTK("(): get root inode failed\n");
-        if (root_inode)
-                iput(root_inode);
-        return -EINVAL;
-}                               /*  End Function devfs_fill_super  */
-static int devfs_get_sb(struct file_system_type *fs_type,
-                        int flags, const char *dev_name,
-                        void *data, struct vfsmount *mnt)
-{
-        return get_sb_single(fs_type, flags, data, devfs_fill_super, mnt);
-}
-static struct file_system_type devfs_fs_type = {
-        .name = DEVFS_NAME,
-        .get_sb = devfs_get_sb,
-        .kill_sb = kill_anon_super,
-};
-/*  File operations for devfsd follow  */
-static ssize_t devfsd_read(struct file *file, char __user *buf, size_t len,
-                           loff_t * ppos)
-{
-        int done = FALSE;
-        int ival;
-        loff_t pos, devname_offset, tlen, rpos;
-        devfs_handle_t de;
-        struct devfsd_buf_entry *entry;
-        struct fs_info *fs_info = file->f_dentry->d_inode->i_sb->s_fs_info;
-        struct devfsd_notify_struct *info = fs_info->devfsd_info;
-        DECLARE_WAITQUEUE(wait, current);
-        /*  Verify the task has grabbed the queue  */
-        if (fs_info->devfsd_task != current)
-                return -EPERM;
-        info->major = 0;
-        info->minor = 0;
-        /*  Block for a new entry  */
-        set_current_state(TASK_INTERRUPTIBLE);
-        add_wait_queue(&fs_info->devfsd_wait_queue, &wait);
-        while (devfsd_queue_empty(fs_info)) {
-                fs_info->devfsd_sleeping = TRUE;
-                wake_up(&fs_info->revalidate_wait_queue);
-                schedule();
-                fs_info->devfsd_sleeping = FALSE;
-                if (signal_pending(current)) {
-                        remove_wait_queue(&fs_info->devfsd_wait_queue, &wait);
-                        __set_current_state(TASK_RUNNING);
-                        return -EINTR;
-                }
-                set_current_state(TASK_INTERRUPTIBLE);
-        }
-        remove_wait_queue(&fs_info->devfsd_wait_queue, &wait);
-        __set_current_state(TASK_RUNNING);
-        /*  Now play with the data  */
-        ival = atomic_read(&fs_info->devfsd_overrun_count);
-        info->overrun_count = ival;
-        entry = fs_info->devfsd_first_event;
-        info->type = entry->type;
-        info->mode = entry->mode;
-        info->uid = entry->uid;
-        info->gid = entry->gid;
-        de = entry->de;
-        if (S_ISCHR(de->mode) || S_ISBLK(de->mode)) {
-                info->major = MAJOR(de->u.dev);
-                info->minor = MINOR(de->u.dev);
-        }
-        pos = devfs_generate_path(de, info->devname, DEVFS_PATHLEN);
-        if (pos < 0)
-                return pos;
-        info->namelen = DEVFS_PATHLEN - pos - 1;
-        if (info->mode == 0)
-                info->mode = de->mode;
-        devname_offset = info->devname - (char *)info;
-        rpos = *ppos;
-        if (rpos < devname_offset) {
-                /*  Copy parts of the header  */
-                tlen = devname_offset - rpos;
-                if (tlen > len)
-                        tlen = len;
-                if (copy_to_user(buf, (char *)info + rpos, tlen)) {
-                        return -EFAULT;
-                }
-                rpos += tlen;
-                buf += tlen;
-                len -= tlen;
-        }
-        if ((rpos >= devname_offset) && (len > 0)) {
-                /*  Copy the name  */
-                tlen = info->namelen + 1;
-                if (tlen > len)
-                        tlen = len;
-                else
-                        done = TRUE;
-                if (copy_to_user
-                    (buf, info->devname + pos + rpos - devname_offset, tlen)) {
-                        return -EFAULT;
-                }
-                rpos += tlen;
-        }
-        tlen = rpos - *ppos;
-        if (done) {
-                devfs_handle_t parent;
-                spin_lock(&fs_info->devfsd_buffer_lock);
-                fs_info->devfsd_first_event = entry->next;
-                if (entry->next == NULL)
-                        fs_info->devfsd_last_event = NULL;
-                spin_unlock(&fs_info->devfsd_buffer_lock);
-                for (; de != NULL; de = parent) {
-                        parent = de->parent;
-                        devfs_put(de);
-                }
-                kmem_cache_free(devfsd_buf_cache, entry);
-                if (ival > 0)
-                        atomic_sub(ival, &fs_info->devfsd_overrun_count);
-                *ppos = 0;
-        } else
-                *ppos = rpos;
-        return tlen;
-}                               /*  End Function devfsd_read  */
-static int devfsd_ioctl(struct inode *inode, struct file *file,
-                        unsigned int cmd, unsigned long arg)
-{
-        int ival;
-        struct fs_info *fs_info = inode->i_sb->s_fs_info;
-        switch (cmd) {
-        case DEVFSDIOC_GET_PROTO_REV:
-                ival = DEVFSD_PROTOCOL_REVISION_KERNEL;
-                if (copy_to_user((void __user *)arg, &ival, sizeof ival))
-                        return -EFAULT;
-                break;
-        case DEVFSDIOC_SET_EVENT_MASK:
-                /*  Ensure only one reader has access to the queue. This scheme will
-                   work even if the global kernel lock were to be removed, because it
-                   doesn't matter who gets in first, as long as only one gets it  */
-                if (fs_info->devfsd_task == NULL) {
-                        static DEFINE_SPINLOCK(lock);
-                        if (!spin_trylock(&lock))
-                                return -EBUSY;
-                        if (fs_info->devfsd_task != NULL) {     /*  We lost the race...  */
-                                spin_unlock(&lock);
-                                return -EBUSY;
-                        }
-                        fs_info->devfsd_task = current;
-                        spin_unlock(&lock);
-                        fs_info->devfsd_pgrp =
-                            (process_group(current) ==
-                             current->pid) ? process_group(current) : 0;
-                        fs_info->devfsd_file = file;
-                        fs_info->devfsd_info =
-                            kmalloc(sizeof *fs_info->devfsd_info, GFP_KERNEL);
-                        if (!fs_info->devfsd_info) {
-                                devfsd_close(inode, file);
-                                return -ENOMEM;
-                        }
-                } else if (fs_info->devfsd_task != current)
-                        return -EBUSY;
-                fs_info->devfsd_event_mask = arg;       /*  Let the masses come forth  */
-                break;
-        case DEVFSDIOC_RELEASE_EVENT_QUEUE:
-                if (fs_info->devfsd_file != file)
-                        return -EPERM;
-                return devfsd_close(inode, file);
-                /*break; */
-#ifdef CONFIG_DEVFS_DEBUG
-        case DEVFSDIOC_SET_DEBUG_MASK:
-                if (copy_from_user(&ival, (void __user *)arg, sizeof ival))
-                        return -EFAULT;
-                devfs_debug = ival;
-                break;
-#endif
-        default:
-                return -ENOIOCTLCMD;
-        }
-        return 0;
-}                               /*  End Function devfsd_ioctl  */
-static int devfsd_close(struct inode *inode, struct file *file)
-{
-        struct devfsd_buf_entry *entry, *next;
-        struct fs_info *fs_info = inode->i_sb->s_fs_info;
-        if (fs_info->devfsd_file != file)
-                return 0;
-        fs_info->devfsd_event_mask = 0;
-        fs_info->devfsd_file = NULL;
-        spin_lock(&fs_info->devfsd_buffer_lock);
-        entry = fs_info->devfsd_first_event;
-        fs_info->devfsd_first_event = NULL;
-        fs_info->devfsd_last_event = NULL;
-        kfree(fs_info->devfsd_info);
-        fs_info->devfsd_info = NULL;
-        spin_unlock(&fs_info->devfsd_buffer_lock);
-        fs_info->devfsd_pgrp = 0;
-        fs_info->devfsd_task = NULL;
-        wake_up(&fs_info->revalidate_wait_queue);
-        for (; entry; entry = next) {
-                next = entry->next;
-                kmem_cache_free(devfsd_buf_cache, entry);
-        }
-        return 0;
-}                               /*  End Function devfsd_close  */
-#ifdef CONFIG_DEVFS_DEBUG
-static ssize_t stat_read(struct file *file, char __user *buf, size_t len,
-                         loff_t * ppos)
-{
-        ssize_t num;
-        char txt[80];
-        num = sprintf(txt, "Number of entries: %u  number of bytes: %u\n",
-                      stat_num_entries, stat_num_bytes) + 1;
-        if (*ppos >= num)
-                return 0;
-        if (*ppos + len > num)
-                len = num - *ppos;
-        if (copy_to_user(buf, txt + *ppos, len))
-                return -EFAULT;
-        *ppos += len;
-        return len;
-}                               /*  End Function stat_read  */
-#endif
-static int __init init_devfs_fs(void)
-{
-        int err;
-        int major;
-        struct devfs_entry *devfsd;
-#ifdef CONFIG_DEVFS_DEBUG
-        struct devfs_entry *stat;
-#endif
-        if (_devfs_get_root_entry() == NULL)
-                return -ENOMEM;
-        printk(KERN_INFO "%s: %s Richard Gooch (rgooch@atnf.csiro.au)\n",
-               DEVFS_NAME, DEVFS_VERSION);
-        devfsd_buf_cache = kmem_cache_create("devfsd_event",
-                                             sizeof(struct devfsd_buf_entry),
-                                             0, 0, NULL, NULL);
-        if (!devfsd_buf_cache)
-                OOPS("(): unable to allocate event slab\n");
-#ifdef CONFIG_DEVFS_DEBUG
-        devfs_debug = devfs_debug_init;
-        printk(KERN_INFO "%s: devfs_debug: 0x%0x\n", DEVFS_NAME, devfs_debug);
-#endif
-        printk(KERN_INFO "%s: boot_options: 0x%0x\n", DEVFS_NAME, boot_options);
-        /* register special device for devfsd communication */
-        major = register_chrdev(0, "devfs", &devfs_fops);
-        if (major < 0)
-                return major;
-        /*  And create the entry for ".devfsd"  */
-        devfsd = _devfs_alloc_entry(".devfsd", 0, S_IFCHR | S_IRUSR | S_IWUSR);
-        if (devfsd == NULL)
-                return -ENOMEM;
-        devfsd->u.dev = MKDEV(major, 0);
-        _devfs_append_entry(root_entry, devfsd, NULL);
-#ifdef CONFIG_DEVFS_DEBUG
-        stat = _devfs_alloc_entry(".stat", 0, S_IFCHR | S_IRUGO);
-        if (stat == NULL)
-                return -ENOMEM;
-        stat->u.dev = MKDEV(major, 1);
-        _devfs_append_entry(root_entry, stat, NULL);
-#endif
-        err = register_filesystem(&devfs_fs_type);
-        return err;
-}                               /*  End Function init_devfs_fs  */
-void __init mount_devfs_fs(void)
-{
-        int err;
-        if (!(boot_options & OPTION_MOUNT))
-                return;
-        err = do_mount("none", "/dev", "devfs", 0, NULL);
-        if (err == 0)
-                printk(KERN_INFO "Mounted devfs on /dev\n");
-        else
-                PRINTK("(): unable to mount devfs, err: %d\n", err);
-}                               /*  End Function mount_devfs_fs  */
-module_init(init_devfs_fs)
diff --git a/fs/devfs/util.c b/fs/devfs/util.c
deleted file mode 100644
index db06d388c9ac..000000000000
--- a/fs/devfs/util.c
+++ /dev/null
@@ -1,97 +0,0 @@
-/*  devfs (Device FileSystem) utilities.
-    Copyright (C) 1999-2002  Richard Gooch
-    This library is free software; you can redistribute it and/or
-    modify it under the terms of the GNU Library General Public
-    License as published by the Free Software Foundation; either
-    version 2 of the License, or (at your option) any later version.
-    This library is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-    Library General Public License for more details.
-    You should have received a copy of the GNU Library General Public
-    License along with this library; if not, write to the Free
-    Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-    Richard Gooch may be reached by email at  rgooch@atnf.csiro.au
-    The postal address is:
-      Richard Gooch, c/o ATNF, P. O. Box 76, Epping, N.S.W., 2121, Australia.
-    ChangeLog
-    19991031   Richard Gooch <rgooch@atnf.csiro.au>
-               Created.
-    19991103   Richard Gooch <rgooch@atnf.csiro.au>
-               Created <_devfs_convert_name> and supported SCSI and IDE CD-ROMs
-    20000203   Richard Gooch <rgooch@atnf.csiro.au>
-               Changed operations pointer type to void *.
-    20000621   Richard Gooch <rgooch@atnf.csiro.au>
-               Changed interface to <devfs_register_series>.
-    20000622   Richard Gooch <rgooch@atnf.csiro.au>
-               Took account of interface change to <devfs_mk_symlink>.
-               Took account of interface change to <devfs_mk_dir>.
-    20010519   Richard Gooch <rgooch@atnf.csiro.au>
-               Documentation cleanup.
-    20010709   Richard Gooch <rgooch@atnf.csiro.au>
-               Created <devfs_*alloc_major> and <devfs_*alloc_devnum>.
-    20010710   Richard Gooch <rgooch@atnf.csiro.au>
-               Created <devfs_*alloc_unique_number>.
-    20010730   Richard Gooch <rgooch@atnf.csiro.au>
-               Documentation typo fix.
-    20010806   Richard Gooch <rgooch@atnf.csiro.au>
-               Made <block_semaphore> and <char_semaphore> private.
-    20010813   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed bug in <devfs_alloc_unique_number>: limited to 128 numbers
-    20010818   Richard Gooch <rgooch@atnf.csiro.au>
-               Updated major masks up to Linus' "no new majors" proclamation.
-               Block: were 126 now 122 free, char: were 26 now 19 free.
-    20020324   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed bug in <devfs_alloc_unique_number>: was clearing beyond
-               bitfield.
-    20020326   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed bitfield data type for <devfs_*alloc_devnum>.
-               Made major bitfield type and initialiser 64 bit safe.
-    20020413   Richard Gooch <rgooch@atnf.csiro.au>
-               Fixed shift warning on 64 bit machines.
-    20020428   Richard Gooch <rgooch@atnf.csiro.au>
-               Copied and used macro for error messages from fs/devfs/base.c 
-    20021013   Richard Gooch <rgooch@atnf.csiro.au>
-               Documentation fix.
-    20030101   Adam J. Richter <adam@yggdrasil.com>
-               Eliminate DEVFS_SPECIAL_{CHR,BLK}.  Use mode_t instead.
-    20030106   Christoph Hellwig <hch@infradead.org>
-               Rewrite devfs_{,de}alloc_devnum to look like C code.
-*/
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/devfs_fs_kernel.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-#include <linux/genhd.h>
-#include <linux/bitops.h>
-int devfs_register_tape(const char *name)
-{
-        char tname[32], dest[64];
-        static unsigned int tape_counter;
-        unsigned int n = tape_counter++;
-        sprintf(dest, "../%s", name);
-        sprintf(tname, "tapes/tape%u", n);
-        devfs_mk_symlink(tname, dest);
-        return n;
-}
-EXPORT_SYMBOL(devfs_register_tape);
-void devfs_unregister_tape(int num)
-{
-        if (num >= 0)
-                devfs_remove("tapes/tape%u", num);
-}
-EXPORT_SYMBOL(devfs_unregister_tape);
diff --git a/fs/partitions/Makefile b/fs/partitions/Makefile
index 42c7d3878ed0..d713ce6b3e12 100644
--- a/fs/partitions/Makefile
+++ b/fs/partitions/Makefile
@@ -4,7 +4,6 @@
 obj-y := check.o
-obj-$(CONFIG_DEVFS_FS) += devfs.o
 obj-$(CONFIG_ACORN_PARTITION) += acorn.o
 obj-$(CONFIG_AMIGA_PARTITION) += amiga.o
 obj-$(CONFIG_ATARI_PARTITION) += atari.o
diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index 2ef313a96b66..839634026eb5 100644
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -18,10 +18,8 @@
 #include <linux/fs.h>
 #include <linux/kmod.h>
 #include <linux/ctype.h>
-#include <linux/devfs_fs_kernel.h>
 #include "check.h"
-#include "devfs.h"
 #include "acorn.h"
 #include "amiga.h"
@@ -161,18 +159,11 @@ check_partition(struct gendisk *hd, struct block_device *bdev)
        if (!state)
                return NULL;
-#ifdef CONFIG_DEVFS_FS
+        disk_name(hd, 0, state->name);
-        if (hd->devfs_name[0] != '\0') {
+        printk(KERN_INFO " %s:", state->name);
-                printk(KERN_INFO " /dev/%s:", hd->devfs_name);
+        if (isdigit(state->name[strlen(state->name)-1]))
                sprintf(state->name, "p");
-        }
-#endif
-        else {
-                disk_name(hd, 0, state->name);
-                printk(KERN_INFO " %s:", state->name);
-                if (isdigit(state->name[strlen(state->name)-1]))
-                        sprintf(state->name, "p");
-        }
        state->limit = hd->minors;
        i = res = 0;
        while (!res && check_part[i]) {
@@ -328,7 +319,6 @@ void delete_partition(struct gendisk *disk, int part)
        p->nr_sects = 0;
        p->ios[0] = p->ios[1] = 0;
        p->sectors[0] = p->sectors[1] = 0;
-        devfs_remove("%s/part%d", disk->devfs_name, part);
        sysfs_remove_link(&p->kobj, "subsystem");
        if (p->holder_dir)
                kobject_unregister(p->holder_dir);
@@ -350,10 +340,6 @@ void add_partition(struct gendisk *disk, int part, sector_t start, sector_t len)
        p->nr_sects = len;
        p->partno = part;
-        devfs_mk_bdev(MKDEV(disk->major, disk->first_minor + part),
-                        S_IFBLK|S_IRUSR|S_IWUSR,
-                        "%s/part%d", disk->devfs_name, part);
        if (isdigit(disk->kobj.name[strlen(disk->kobj.name)-1]))
                snprintf(p->kobj.name,KOBJ_NAME_LEN,"%sp%d",disk->kobj.name,part);
        else
@@ -423,14 +409,8 @@ void register_disk(struct gendisk *disk)
        disk_sysfs_add_subdirs(disk);
        /* No minors to use for partitions */
-        if (disk->minors == 1) {
+        if (disk->minors == 1)
-                if (disk->devfs_name[0] != '\0')
-                        devfs_add_disk(disk);
                goto exit;
-        }
-        /* always add handle for the whole disk */
-        devfs_add_partitioned(disk);
        /* No such device (e.g., media were just removed) */
        if (!get_capacity(disk))
@@ -538,8 +518,6 @@ void del_gendisk(struct gendisk *disk)
        disk_stat_set_all(disk, 0);
        disk->stamp = 0;
-        devfs_remove_disk(disk);
        kobject_uevent(&disk->kobj, KOBJ_REMOVE);
        if (disk->holder_dir)
                kobject_unregister(disk->holder_dir);
diff --git a/fs/partitions/devfs.c b/fs/partitions/devfs.c
deleted file mode 100644
index 3f0a780c9cec..000000000000
--- a/fs/partitions/devfs.c
+++ /dev/null
@@ -1,130 +0,0 @@
-/*
- * This tries to keep block devices away from devfs as much as possible.
- */
-#include <linux/fs.h>
-#include <linux/devfs_fs_kernel.h>
-#include <linux/vmalloc.h>
-#include <linux/genhd.h>
-#include <linux/bitops.h>
-#include <linux/mutex.h>
-struct unique_numspace {
-        u32               num_free;          /*  Num free in bits       */
-        u32               length;            /*  Array length in bytes  */
-        unsigned long     *bits;
-        struct semaphore  mutex;
-};
-static DEFINE_MUTEX(numspace_mutex);
-static int expand_numspace(struct unique_numspace *s)
-{
-        u32 length;
-        void *bits;
-        if (s->length < 16)
-                length = 16;
-        else
-                length = s->length << 1;
-        bits = vmalloc(length);
-        if (!bits)
-                return -ENOMEM;
-        if (s->bits) {
-                memcpy(bits, s->bits, s->length);
-                vfree(s->bits);
-        }
-                
-        s->num_free = (length - s->length) << 3;
-        s->bits = bits;
-        memset(bits + s->length, 0, length - s->length);
-        s->length = length;
-        return 0;
-}
-static int alloc_unique_number(struct unique_numspace *s)
-{
-        int rval = 0;
-        mutex_lock(&numspace_mutex);
-        if (s->num_free < 1)
-                rval = expand_numspace(s);
-        if (!rval) {
-                rval = find_first_zero_bit(s->bits, s->length << 3);
-                --s->num_free;
-                __set_bit(rval, s->bits);
-        }
-        mutex_unlock(&numspace_mutex);
-        return rval;
-}
-static void dealloc_unique_number(struct unique_numspace *s, int number)
-{
-        int old_val;
-        if (number >= 0) {
-                mutex_lock(&numspace_mutex);
-                old_val = __test_and_clear_bit(number, s->bits);
-                if (old_val)
-                        ++s->num_free;
-                mutex_unlock(&numspace_mutex);
-        }
-}
-static struct unique_numspace disc_numspace;
-static struct unique_numspace cdrom_numspace;
-void devfs_add_partitioned(struct gendisk *disk)
-{
-        char dirname[64], symlink[16];
-        devfs_mk_dir(disk->devfs_name);
-        devfs_mk_bdev(MKDEV(disk->major, disk->first_minor),
-                        S_IFBLK|S_IRUSR|S_IWUSR,
-                        "%s/disc", disk->devfs_name);
-        disk->number = alloc_unique_number(&disc_numspace);
-        sprintf(symlink, "discs/disc%d", disk->number);
-        sprintf(dirname, "../%s", disk->devfs_name);
-        devfs_mk_symlink(symlink, dirname);
-}
-void devfs_add_disk(struct gendisk *disk)
-{
-        devfs_mk_bdev(MKDEV(disk->major, disk->first_minor),
-                        (disk->flags & GENHD_FL_CD) ?
-                                S_IFBLK|S_IRUGO|S_IWUGO :
-                                S_IFBLK|S_IRUSR|S_IWUSR,
-                        "%s", disk->devfs_name);
-        if (disk->flags & GENHD_FL_CD) {
-                char dirname[64], symlink[16];
-                disk->number = alloc_unique_number(&cdrom_numspace);
-                sprintf(symlink, "cdroms/cdrom%d", disk->number);
-                sprintf(dirname, "../%s", disk->devfs_name);
-                devfs_mk_symlink(symlink, dirname);
-        }
-}
-void devfs_remove_disk(struct gendisk *disk)
-{
-        if (disk->minors != 1) {
-                devfs_remove("discs/disc%d", disk->number);
-                dealloc_unique_number(&disc_numspace, disk->number);
-                devfs_remove("%s/disc", disk->devfs_name);
-        }
-        if (disk->flags & GENHD_FL_CD) {
-                devfs_remove("cdroms/cdrom%d", disk->number);
-                dealloc_unique_number(&cdrom_numspace, disk->number);
-        }
-        devfs_remove(disk->devfs_name);
-}
diff --git a/fs/partitions/devfs.h b/fs/partitions/devfs.h
deleted file mode 100644
index 176118b4e492..000000000000
--- a/fs/partitions/devfs.h
+++ /dev/null
@@ -1,10 +0,0 @@
-#ifdef CONFIG_DEVFS_FS
-void devfs_add_disk(struct gendisk *dev);
-void devfs_add_partitioned(struct gendisk *dev);
-void devfs_remove_disk(struct gendisk *dev);
-#else
-# define devfs_add_disk(disk)                   do { } while (0)
-# define devfs_add_partitioned(disk)            do { } while (0)
-# define devfs_remove_disk(disk)                do { } while (0)
-#endif
diff --git a/include/asm-ppc/ocp.h b/include/asm-ppc/ocp.h
index 3be5d760ffcd..16dbc7d17450 100644
--- a/include/asm-ppc/ocp.h
+++ b/include/asm-ppc/ocp.h
@@ -26,7 +26,6 @@
 #include <linux/init.h>
 #include <linux/list.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/device.h>
 #include <asm/mmu.h>
diff --git a/include/linux/compat_ioctl.h b/include/linux/compat_ioctl.h
index 917d62e41480..269d000bb2a3 100644
--- a/include/linux/compat_ioctl.h
+++ b/include/linux/compat_ioctl.h
@@ -567,11 +567,6 @@ COMPATIBLE_IOCTL(AUTOFS_IOC_PROTOSUBVER)
 COMPATIBLE_IOCTL(AUTOFS_IOC_ASKREGHOST)
 COMPATIBLE_IOCTL(AUTOFS_IOC_TOGGLEREGHOST)
 COMPATIBLE_IOCTL(AUTOFS_IOC_ASKUMOUNT)
-/* DEVFS */
-COMPATIBLE_IOCTL(DEVFSDIOC_GET_PROTO_REV)
-COMPATIBLE_IOCTL(DEVFSDIOC_SET_EVENT_MASK)
-COMPATIBLE_IOCTL(DEVFSDIOC_RELEASE_EVENT_QUEUE)
-COMPATIBLE_IOCTL(DEVFSDIOC_SET_DEBUG_MASK)
 /* Raw devices */
 COMPATIBLE_IOCTL(RAW_SETBIND)
 COMPATIBLE_IOCTL(RAW_GETBIND)
diff --git a/include/linux/devfs_fs.h b/include/linux/devfs_fs.h
deleted file mode 100644
index de236f431877..000000000000
--- a/include/linux/devfs_fs.h
+++ /dev/null
@@ -1,41 +0,0 @@
-#ifndef _LINUX_DEVFS_FS_H
-#define _LINUX_DEVFS_FS_H
-#include <linux/ioctl.h>
-#define DEVFSD_PROTOCOL_REVISION_KERNEL  5
-#define DEVFSD_IOCTL_BASE       'd'
-/*  These are the various ioctls  */
-#define DEVFSDIOC_GET_PROTO_REV         _IOR(DEVFSD_IOCTL_BASE, 0, int)
-#define DEVFSDIOC_SET_EVENT_MASK        _IOW(DEVFSD_IOCTL_BASE, 2, int)
-#define DEVFSDIOC_RELEASE_EVENT_QUEUE   _IOW(DEVFSD_IOCTL_BASE, 3, int)
-#define DEVFSDIOC_SET_DEBUG_MASK        _IOW(DEVFSD_IOCTL_BASE, 4, int)
-#define DEVFSD_NOTIFY_REGISTERED    0
-#define DEVFSD_NOTIFY_UNREGISTERED  1
-#define DEVFSD_NOTIFY_ASYNC_OPEN    2
-#define DEVFSD_NOTIFY_CLOSE         3
-#define DEVFSD_NOTIFY_LOOKUP        4
-#define DEVFSD_NOTIFY_CHANGE        5
-#define DEVFSD_NOTIFY_CREATE        6
-#define DEVFSD_NOTIFY_DELETE        7
-#define DEVFS_PATHLEN               1024        /*  Never change this otherwise the
-                                                   binary interface will change   */
-struct devfsd_notify_struct {   /*  Use native C types to ensure same types in kernel and user space     */
-        unsigned int type;      /*  DEVFSD_NOTIFY_* value                   */
-        unsigned int mode;      /*  Mode of the inode or device entry       */
-        unsigned int major;     /*  Major number of device entry            */
-        unsigned int minor;     /*  Minor number of device entry            */
-        unsigned int uid;       /*  Uid of process, inode or device entry   */
-        unsigned int gid;       /*  Gid of process, inode or device entry   */
-        unsigned int overrun_count;     /*  Number of lost events                   */
-        unsigned int namelen;   /*  Number of characters not including '\0' */
-        /*  The device name MUST come last                                       */
-        char devname[DEVFS_PATHLEN];    /*  This will be '\0' terminated            */
-};
-#endif                          /*  _LINUX_DEVFS_FS_H  */
diff --git a/include/linux/devfs_fs_kernel.h b/include/linux/devfs_fs_kernel.h
deleted file mode 100644
index 0d74a6f22abc..000000000000
--- a/include/linux/devfs_fs_kernel.h
+++ /dev/null
@@ -1,57 +0,0 @@
-#ifndef _LINUX_DEVFS_FS_KERNEL_H
-#define _LINUX_DEVFS_FS_KERNEL_H
-#include <linux/fs.h>
-#include <linux/spinlock.h>
-#include <linux/types.h>
-#include <asm/semaphore.h>
-#define DEVFS_SUPER_MAGIC                0x1373
-#ifdef CONFIG_DEVFS_FS
-extern int devfs_mk_bdev(dev_t dev, umode_t mode, const char *fmt, ...)
-    __attribute__ ((format(printf, 3, 4)));
-extern int devfs_mk_cdev(dev_t dev, umode_t mode, const char *fmt, ...)
-    __attribute__ ((format(printf, 3, 4)));
-extern int devfs_mk_symlink(const char *name, const char *link);
-extern int devfs_mk_dir(const char *fmt, ...)
-    __attribute__ ((format(printf, 1, 2)));
-extern void devfs_remove(const char *fmt, ...)
-    __attribute__ ((format(printf, 1, 2)));
-extern int devfs_register_tape(const char *name);
-extern void devfs_unregister_tape(int num);
-extern void mount_devfs_fs(void);
-#else                           /*  CONFIG_DEVFS_FS  */
-static inline int devfs_mk_bdev(dev_t dev, umode_t mode, const char *fmt, ...)
-{
-        return 0;
-}
-static inline int devfs_mk_cdev(dev_t dev, umode_t mode, const char *fmt, ...)
-{
-        return 0;
-}
-static inline int devfs_mk_symlink(const char *name, const char *link)
-{
-        return 0;
-}
-static inline int devfs_mk_dir(const char *fmt, ...)
-{
-        return 0;
-}
-static inline void devfs_remove(const char *fmt, ...)
-{
-}
-static inline int devfs_register_tape(const char *name)
-{
-        return -1;
-}
-static inline void devfs_unregister_tape(int num)
-{
-}
-static inline void mount_devfs_fs(void)
-{
-        return;
-}
-#endif                          /*  CONFIG_DEVFS_FS  */
-#endif                          /*  _LINUX_DEVFS_FS_KERNEL_H  */
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 07a08e92bc73..b45928f5c63f 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -380,7 +380,6 @@ struct fb_cursor {
 #include <linux/tty.h>
 #include <linux/device.h>
 #include <linux/workqueue.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/notifier.h>
 #include <linux/list.h>
 #include <asm/io.h>
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 3498a0c68184..e4af57e87c17 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -112,8 +112,6 @@ struct gendisk {
        sector_t capacity;
        int flags;
-        char devfs_name[64];            /* devfs crap */
-        int number;                     /* more of the same */
        struct device *driverfs_dev;
        struct kobject kobj;
        struct kobject *holder_dir;
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 0c100168c0cf..285316c836b5 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -552,7 +552,6 @@ typedef struct ide_drive_s {
        struct hd_driveid       *id;    /* drive model identification info */
        struct proc_dir_entry *proc;    /* /proc/ide/ directory entry */
        struct ide_settings_s *settings;/* /proc/ide/ drive settings */
-        char            devfs_name[64]; /* devfs crap */
        struct hwif_s           *hwif;  /* actually (ide_hwif_t *) */
diff --git a/include/linux/miscdevice.h b/include/linux/miscdevice.h
index 5b584dafb5a6..b03cfb91e228 100644
--- a/include/linux/miscdevice.h
+++ b/include/linux/miscdevice.h
@@ -40,7 +40,6 @@ struct miscdevice  {
        struct list_head list;
        struct device *dev;
        struct class_device *class;
-        char devfs_name[64];
 };
 extern int misc_register(struct miscdevice * misc);
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 951c4e858274..fc1104a2cfa9 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -336,7 +336,6 @@ struct uart_driver {
        struct module           *owner;
        const char              *driver_name;
        const char              *dev_name;
-        const char              *devfs_name;
        int                      major;
        int                      minor;
        int                      nr;
diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
index b368b296d035..58c961c9e170 100644
--- a/include/linux/tty_driver.h
+++ b/include/linux/tty_driver.h
@@ -157,7 +157,6 @@ struct tty_driver {
        struct cdev cdev;
        struct module   *owner;
        const char      *driver_name;
-        const char      *devfs_name;
        const char      *name;
        int     name_base;      /* offset of printed name */
        int     major;          /* major device number */
@@ -242,8 +241,15 @@ void tty_set_operations(struct tty_driver *driver, struct tty_operations *op);
 *      is also a promise, if the above case is true, not to signal
 *      overruns, either.)
 *
- * TTY_DRIVER_NO_DEVFS --- if set, do not create devfs entries. This
+ * TTY_DRIVER_DYNAMIC_DEV --- if set, the individual tty devices need
- *      is only used by tty_register_driver().
+ *      to be registered with a call to tty_register_driver() when the
+ *      device is found in the system and unregistered with a call to
+ *      tty_unregister_device() so the devices will be show up
+ *      properly in sysfs.  If not set, driver->num entries will be
+ *      created by the tty core in sysfs when tty_register_driver() is
+ *      called.  This is to be used by drivers that have tty devices
+ *      that can appear and disappear while the main tty driver is
+ *      registered with the tty core.
 *
 * TTY_DRIVER_DEVPTS_MEM -- don't use the standard arrays, instead
 *      use dynamic memory keyed through the devpts filesystem.  This
@@ -252,7 +258,7 @@ void tty_set_operations(struct tty_driver *driver, struct tty_operations *op);
 #define TTY_DRIVER_INSTALLED            0x0001
 #define TTY_DRIVER_RESET_TERMIOS        0x0002
 #define TTY_DRIVER_REAL_RAW             0x0004
-#define TTY_DRIVER_NO_DEVFS             0x0008
+#define TTY_DRIVER_DYNAMIC_DEV          0x0008
 #define TTY_DRIVER_DEVPTS_MEM           0x0010
 /* tty driver types */
diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h
index a1b473190e65..62dae1a8c441 100644
--- a/include/media/v4l2-dev.h
+++ b/include/media/v4l2-dev.h
@@ -314,7 +314,6 @@ void *priv;
        /* for videodev.c intenal usage -- please don't touch */
        int users;                     /* video_exclusive_{open|close} ... */
        struct mutex lock;             /* ... helper function uses these   */
-        char devfs_name[64];           /* devfs */
        struct class_device class_dev; /* sysfs */
 };
diff --git a/init/Makefile b/init/Makefile
index a2300078f2b7..633a268d270d 100644
--- a/init/Makefile
+++ b/init/Makefile
@@ -6,7 +6,6 @@ obj-y				:= main.o version.o mounts.o initramfs.o
 obj-$(CONFIG_GENERIC_CALIBRATE_DELAY) += calibrate.o
 mounts-y                        := do_mounts.o
-mounts-$(CONFIG_DEVFS_FS)       += do_mounts_devfs.o
 mounts-$(CONFIG_BLK_DEV_RAM)    += do_mounts_rd.o
 mounts-$(CONFIG_BLK_DEV_INITRD) += do_mounts_initrd.o
 mounts-$(CONFIG_BLK_DEV_MD)     += do_mounts_md.o
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 21b3b8f33a72..94aeec7aa917 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -325,7 +325,7 @@ static int __init mount_nfs_root(void)
 {
        void *data = nfs_root_data();
-        create_dev("/dev/root", ROOT_DEV, NULL);
+        create_dev("/dev/root", ROOT_DEV);
        if (data &&
            do_mount_root("/dev/root", "nfs", root_mountflags, data) == 0)
                return 1;
@@ -386,7 +386,7 @@ void __init mount_root(void)
                        change_floppy("root floppy");
        }
 #endif
-        create_dev("/dev/root", ROOT_DEV, root_device_name);
+        create_dev("/dev/root", ROOT_DEV);
        mount_block_root("/dev/root", root_mountflags);
 }
@@ -397,8 +397,6 @@ void __init prepare_namespace(void)
 {
        int is_floppy;
-        mount_devfs();
        if (root_delay) {
                printk(KERN_INFO "Waiting %dsec before mounting root device...\n",
                       root_delay);
@@ -428,10 +426,8 @@ void __init prepare_namespace(void)
        mount_root();
 out:
-        umount_devfs("/dev");
        sys_mount(".", "/", NULL, MS_MOVE, NULL);
        sys_chroot(".");
        security_sb_post_mountroot();
-        mount_devfs_fs ();
 }
diff --git a/init/do_mounts.h b/init/do_mounts.h
index e0a7ac9649e1..e7f2e7fa066e 100644
--- a/init/do_mounts.h
+++ b/init/do_mounts.h
@@ -1,6 +1,5 @@
 #include <linux/config.h>
 #include <linux/kernel.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/init.h>
 #include <linux/syscalls.h>
 #include <linux/unistd.h>
@@ -15,25 +14,12 @@ void  mount_root(void);
 extern int root_mountflags;
 extern char *root_device_name;
-#ifdef CONFIG_DEVFS_FS
+static inline int create_dev(char *name, dev_t dev)
-void mount_devfs(void);
-void umount_devfs(char *path);
-int  create_dev(char *name, dev_t dev, char *devfs_name);
-#else
-static inline void mount_devfs(void) {}
-static inline void umount_devfs(const char *path) {}
-static inline int create_dev(char *name, dev_t dev, char *devfs_name)
 {
        sys_unlink(name);
        return sys_mknod(name, S_IFBLK|0600, new_encode_dev(dev));
 }
-#endif
 #if BITS_PER_LONG == 32
 static inline u32 bstat(char *name)
 {
diff --git a/init/do_mounts_devfs.c b/init/do_mounts_devfs.c
deleted file mode 100644
index cc526474690a..000000000000
--- a/init/do_mounts_devfs.c
+++ /dev/null
@@ -1,137 +0,0 @@
-#include <linux/kernel.h>
-#include <linux/dirent.h>
-#include <linux/string.h>
-#include "do_mounts.h"
-void __init mount_devfs(void)
-{
-        sys_mount("devfs", "/dev", "devfs", 0, NULL);
-}
-void __init umount_devfs(char *path)
-{
-        sys_umount(path, 0);
-}
-/*
- * If the dir will fit in *buf, return its length.  If it won't fit, return
- * zero.  Return -ve on error.
- */
-static int __init do_read_dir(int fd, void *buf, int len)
-{
-        long bytes, n;
-        char *p = buf;
-        sys_lseek(fd, 0, 0);
-        for (bytes = 0; bytes < len; bytes += n) {
-                n = sys_getdents64(fd, (struct linux_dirent64 *)(p + bytes),
-                                        len - bytes);
-                if (n < 0)
-                        return n;
-                if (n == 0)
-                        return bytes;
-        }
-        return 0;
-}
-/*
- * Try to read all of a directory.  Returns the contents at *p, which
- * is kmalloced memory.  Returns the number of bytes read at *len.  Returns
- * NULL on error.
- */
-static void * __init read_dir(char *path, int *len)
-{
-        int size;
-        int fd = sys_open(path, 0, 0);
-        *len = 0;
-        if (fd < 0)
-                return NULL;
-        for (size = 1 << 9; size <= (PAGE_SIZE << MAX_ORDER); size <<= 1) {
-                void *p = kmalloc(size, GFP_KERNEL);
-                int n;
-                if (!p)
-                        break;
-                n = do_read_dir(fd, p, size);
-                if (n > 0) {
-                        sys_close(fd);
-                        *len = n;
-                        return p;
-                }
-                kfree(p);
-                if (n == -EINVAL)
-                        continue;       /* Try a larger buffer */
-                if (n < 0)
-                        break;
-        }
-        sys_close(fd);
-        return NULL;
-}
-/*
- * recursively scan <path>, looking for a device node of type <dev>
- */
-static int __init find_in_devfs(char *path, unsigned dev)
-{
-        char *end = path + strlen(path);
-        int rest = path + 64 - end;
-        int size;
-        char *p = read_dir(path, &size);
-        char *s;
-        if (!p)
-                return -1;
-        for (s = p; s < p + size; s += ((struct linux_dirent64 *)s)->d_reclen) {
-                struct linux_dirent64 *d = (struct linux_dirent64 *)s;
-                if (strlen(d->d_name) + 2 > rest)
-                        continue;
-                switch (d->d_type) {
-                        case DT_BLK:
-                                sprintf(end, "/%s", d->d_name);
-                                if (bstat(path) != dev)
-                                        break;
-                                kfree(p);
-                                return 0;
-                        case DT_DIR:
-                                if (strcmp(d->d_name, ".") == 0)
-                                        break;
-                                if (strcmp(d->d_name, "..") == 0)
-                                        break;
-                                sprintf(end, "/%s", d->d_name);
-                                if (find_in_devfs(path, dev) < 0)
-                                        break;
-                                kfree(p);
-                                return 0;
-                }
-        }
-        kfree(p);
-        return -1;
-}
-/*
- * create a device node called <name> which points to
- * <devfs_name> if possible, otherwise find a device node
- * which matches <dev> and make <name> a symlink pointing to it.
- */
-int __init create_dev(char *name, dev_t dev, char *devfs_name)
-{
-        char path[64];
-        sys_unlink(name);
-        if (devfs_name && devfs_name[0]) {
-                if (strncmp(devfs_name, "/dev/", 5) == 0)
-                        devfs_name += 5;
-                sprintf(path, "/dev/%s", devfs_name);
-                if (sys_access(path, 0) == 0)
-                        return sys_symlink(devfs_name, name);
-        }
-        if (!dev)
-                return -1;
-        strcpy(path, "/dev");
-        if (find_in_devfs(path, new_encode_dev(dev)) < 0)
-                return -1;
-        return sys_symlink(path + 5, name);
-}
diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c
index 405f9031af87..a06f037fa000 100644
--- a/init/do_mounts_initrd.c
+++ b/init/do_mounts_initrd.c
@@ -44,7 +44,7 @@ static void __init handle_initrd(void)
        int pid;
        real_root_dev = new_encode_dev(ROOT_DEV);
-        create_dev("/dev/root.old", Root_RAM0, NULL);
+        create_dev("/dev/root.old", Root_RAM0);
        /* mount initrd on rootfs' /root */
        mount_block_root("/dev/root.old", root_mountflags & ~MS_RDONLY);
        sys_mkdir("/old", 0700);
@@ -54,7 +54,6 @@ static void __init handle_initrd(void)
        sys_chdir("/root");
        sys_mount(".", "/", NULL, MS_MOVE, NULL);
        sys_chroot(".");
-        mount_devfs_fs ();
        current->flags |= PF_NOFREEZE;
        pid = kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD);
@@ -71,7 +70,6 @@ static void __init handle_initrd(void)
        sys_chroot(".");
        sys_close(old_fd);
        sys_close(root_fd);
-        umount_devfs("/old/dev");
        if (new_decode_dev(real_root_dev) == Root_RAM0) {
                sys_chdir("/old");
@@ -107,7 +105,7 @@ static void __init handle_initrd(void)
 int __init initrd_load(void)
 {
        if (mount_initrd) {
-                create_dev("/dev/ram", Root_RAM0, NULL);
+                create_dev("/dev/ram", Root_RAM0);
                /*
                 * Load the initrd data into /dev/ram0. Execute it as initrd
                 * unless /dev/ram0 is supposed to be our actual root device,
diff --git a/init/do_mounts_md.c b/init/do_mounts_md.c
index f6f36806f84a..2429e1bf8c60 100644
--- a/init/do_mounts_md.c
+++ b/init/do_mounts_md.c
@@ -125,19 +125,18 @@ static void __init md_setup_drive(void)
                int err = 0;
                char *devname;
                mdu_disk_info_t dinfo;
-                char name[16], devfs_name[16];
+                char name[16];
                minor = md_setup_args[ent].minor;
                partitioned = md_setup_args[ent].partitioned;
                devname = md_setup_args[ent].device_names;
                sprintf(name, "/dev/md%s%d", partitioned?"_d":"", minor);
-                sprintf(devfs_name, "/dev/md/%s%d", partitioned?"d":"", minor);
                if (partitioned)
                        dev = MKDEV(mdp_major, minor << MdpMinorShift);
                else
                        dev = MKDEV(MD_MAJOR, minor);
-                create_dev(name, dev, devfs_name);
+                create_dev(name, dev);
                for (i = 0; i < MD_SB_DISKS && devname != 0; i++) {
                        char *p;
                        char comp_name[64];
@@ -272,7 +271,7 @@ __setup("md=", md_setup);
 void __init md_run_setup(void)
 {
-        create_dev("/dev/md0", MKDEV(MD_MAJOR, 0), "md/0");
+        create_dev("/dev/md0", MKDEV(MD_MAJOR, 0));
        if (raid_noautodetect)
                printk(KERN_INFO "md: Skipping autodetection of RAID arrays. (raid=noautodetect)\n");
        else {
diff --git a/init/do_mounts_rd.c b/init/do_mounts_rd.c
index c2683fcd792d..ed652f40f075 100644
--- a/init/do_mounts_rd.c
+++ b/init/do_mounts_rd.c
@@ -262,8 +262,8 @@ int __init rd_load_disk(int n)
 {
        if (rd_prompt)
                change_floppy("root floppy disk to be loaded into RAM disk");
-        create_dev("/dev/root", ROOT_DEV, root_device_name);
+        create_dev("/dev/root", ROOT_DEV);
-        create_dev("/dev/ram", MKDEV(RAMDISK_MAJOR, n), NULL);
+        create_dev("/dev/ram", MKDEV(RAMDISK_MAJOR, n));
        return rd_load_image("/dev/root");
 }
diff --git a/init/main.c b/init/main.c
index 0d57f6ccb63a..bce0eb7f4f8f 100644
--- a/init/main.c
+++ b/init/main.c
@@ -15,7 +15,6 @@
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/proc_fs.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/kernel.h>
 #include <linux/syscalls.h>
 #include <linux/string.h>
diff --git a/mm/shmem.c b/mm/shmem.c
index ea64c07cbe72..b14ff817d162 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -26,7 +26,6 @@
 #include <linux/config.h>
 #include <linux/module.h>
 #include <linux/init.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/fs.h>
 #include <linux/mm.h>
 #include <linux/mman.h>
@@ -2252,9 +2251,7 @@ static int __init init_tmpfs(void)
                printk(KERN_ERR "Could not register tmpfs\n");
                goto out2;
        }
-#ifdef CONFIG_TMPFS
-        devfs_mk_dir("shm");
-#endif
        shm_mnt = vfs_kern_mount(&tmpfs_fs_type, MS_NOUSER,
                                tmpfs_fs_type.name, NULL);
        if (IS_ERR(shm_mnt)) {
diff --git a/mm/tiny-shmem.c b/mm/tiny-shmem.c
index f9d6a9cc91c4..5f2cbf0f153c 100644
--- a/mm/tiny-shmem.c
+++ b/mm/tiny-shmem.c
@@ -12,7 +12,6 @@
 #include <linux/fs.h>
 #include <linux/init.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/vfs.h>
 #include <linux/mount.h>
 #include <linux/file.h>
@@ -33,9 +32,6 @@ static int __init init_tmpfs(void)
 {
        BUG_ON(register_filesystem(&tmpfs_fs_type) != 0);
-#ifdef CONFIG_TMPFS
-        devfs_mk_dir("shm");
-#endif
        shm_mnt = kern_mount(&tmpfs_fs_type);
        BUG_ON(IS_ERR(shm_mnt));
diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c
index b81fad893328..b105a715fa93 100644
--- a/net/bluetooth/rfcomm/tty.c
+++ b/net/bluetooth/rfcomm/tty.c
@@ -1021,13 +1021,12 @@ int rfcomm_init_ttys(void)
        rfcomm_tty_driver->owner        = THIS_MODULE;
        rfcomm_tty_driver->driver_name  = "rfcomm";
-        rfcomm_tty_driver->devfs_name   = "bluetooth/rfcomm/";
        rfcomm_tty_driver->name         = "rfcomm";
        rfcomm_tty_driver->major        = RFCOMM_TTY_MAJOR;
        rfcomm_tty_driver->minor_start  = RFCOMM_TTY_MINOR;
        rfcomm_tty_driver->type         = TTY_DRIVER_TYPE_SERIAL;
        rfcomm_tty_driver->subtype      = SERIAL_TYPE_NORMAL;
-        rfcomm_tty_driver->flags        = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
+        rfcomm_tty_driver->flags        = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
        rfcomm_tty_driver->init_termios = tty_std_termios;
        rfcomm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
        tty_set_operations(rfcomm_tty_driver, &rfcomm_ops);
diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c
index 6f20b4206e08..b592c4bc3331 100644
--- a/net/irda/ircomm/ircomm_tty.c
+++ b/net/irda/ircomm/ircomm_tty.c
@@ -124,7 +124,6 @@ static int __init ircomm_tty_init(void)
        driver->owner           = THIS_MODULE;
        driver->driver_name     = "ircomm";
        driver->name            = "ircomm";
-        driver->devfs_name      = "ircomm";
        driver->major           = IRCOMM_TTY_MAJOR;
        driver->minor_start     = IRCOMM_TTY_MINOR;
        driver->type            = TTY_DRIVER_TYPE_SERIAL;
diff --git a/net/irda/irnet/irnet.h b/net/irda/irnet/irnet.h
index e4fe1e80029c..ad6caba02a7b 100644
--- a/net/irda/irnet/irnet.h
+++ b/net/irda/irnet/irnet.h
@@ -244,7 +244,6 @@
 #include <linux/skbuff.h>
 #include <linux/tty.h>
 #include <linux/proc_fs.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/netdevice.h>
 #include <linux/miscdevice.h>
 #include <linux/poll.h>
diff --git a/sound/core/info.c b/sound/core/info.c
index 10c1772bf3ea..340332c6d973 100644
--- a/sound/core/info.c
+++ b/sound/core/info.c
@@ -29,7 +29,6 @@
 #include <sound/info.h>
 #include <sound/version.h>
 #include <linux/proc_fs.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/mutex.h>
 #include <stdarg.h>
diff --git a/sound/core/sound.c b/sound/core/sound.c
index cd862728346c..264f2efd1af8 100644
--- a/sound/core/sound.c
+++ b/sound/core/sound.c
@@ -32,7 +32,6 @@
 #include <sound/control.h>
 #include <sound/initval.h>
 #include <linux/kmod.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/mutex.h>
 #define SNDRV_OS_MINORS 256
@@ -42,7 +41,6 @@ int snd_major;
 EXPORT_SYMBOL(snd_major);
 static int cards_limit = 1;
-static int device_mode = S_IFCHR | S_IRUGO | S_IWUGO;
 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
 MODULE_DESCRIPTION("Advanced Linux Sound Architecture driver for soundcards.");
@@ -51,10 +49,6 @@ module_param(major, int, 0444);
 MODULE_PARM_DESC(major, "Major # for sound driver.");
 module_param(cards_limit, int, 0444);
 MODULE_PARM_DESC(cards_limit, "Count of auto-loadable soundcards.");
-#ifdef CONFIG_DEVFS_FS
-module_param(device_mode, int, 0444);
-MODULE_PARM_DESC(device_mode, "Device file permission mask for devfs.");
-#endif
 MODULE_ALIAS_CHARDEV_MAJOR(CONFIG_SND_MAJOR);
 /* this one holds the actual max. card number currently available.
@@ -273,8 +267,6 @@ int snd_register_device(int type, struct snd_card *card, int dev,
                return minor;
        }
        snd_minors[minor] = preg;
-        if (type != SNDRV_DEVICE_TYPE_CONTROL || preg->card >= cards_limit)
-                devfs_mk_cdev(MKDEV(major, minor), S_IFCHR | device_mode, "snd/%s", name);
        if (card)
                device = card->dev;
        class_device_create(sound_class, NULL, MKDEV(major, minor), device, "%s", name);
@@ -314,9 +306,6 @@ int snd_unregister_device(int type, struct snd_card *card, int dev)
                return -EINVAL;
        }
-        if (mptr->type != SNDRV_DEVICE_TYPE_CONTROL ||
-            mptr->card >= cards_limit)                  /* created in sound.c */
-                devfs_remove("snd/%s", mptr->name);
        class_device_destroy(sound_class, MKDEV(major, minor));
        snd_minors[minor] = NULL;
@@ -411,24 +400,17 @@ int __exit snd_minor_info_done(void)
 static int __init alsa_sound_init(void)
 {
-        short controlnum;
        snd_major = major;
        snd_ecards_limit = cards_limit;
-        devfs_mk_dir("snd");
        if (register_chrdev(major, "alsa", &snd_fops)) {
                snd_printk(KERN_ERR "unable to register native major device number %d\n", major);
-                devfs_remove("snd");
                return -EIO;
        }
        if (snd_info_init() < 0) {
                unregister_chrdev(major, "alsa");
-                devfs_remove("snd");
                return -ENOMEM;
        }
        snd_info_minor_register();
-        for (controlnum = 0; controlnum < cards_limit; controlnum++)
-                devfs_mk_cdev(MKDEV(major, controlnum<<5), S_IFCHR | device_mode, "snd/controlC%d", controlnum);
 #ifndef MODULE
        printk(KERN_INFO "Advanced Linux Sound Architecture Driver Version " CONFIG_SND_VERSION CONFIG_SND_DATE ".\n");
 #endif
@@ -437,16 +419,10 @@ static int __init alsa_sound_init(void)
 static void __exit alsa_sound_exit(void)
 {
-        short controlnum;
-        for (controlnum = 0; controlnum < cards_limit; controlnum++)
-                devfs_remove("snd/controlC%d", controlnum);
        snd_info_minor_unregister();
        snd_info_done();
        if (unregister_chrdev(major, "alsa") != 0)
                snd_printk(KERN_ERR "unable to unregister major device number %d\n", major);
-        devfs_remove("snd");
 }
 module_init(alsa_sound_init)
diff --git a/sound/oss/soundcard.c b/sound/oss/soundcard.c
index d33bb464f70e..a33289948902 100644
--- a/sound/oss/soundcard.c
+++ b/sound/oss/soundcard.c
@@ -38,7 +38,6 @@
 #include <linux/wait.h>
 #include <linux/slab.h>
 #include <linux/ioport.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/major.h>
 #include <linux/delay.h>
 #include <linux/proc_fs.h>
@@ -564,9 +563,6 @@ static int __init oss_init(void)
        sound_dmap_flag = (dmabuf > 0 ? 1 : 0);
        for (i = 0; i < sizeof (dev_list) / sizeof *dev_list; i++) {
-                devfs_mk_cdev(MKDEV(SOUND_MAJOR, dev_list[i].minor),
-                                S_IFCHR | dev_list[i].mode,
-                                "sound/%s", dev_list[i].name);
                class_device_create(sound_class, NULL,
                                    MKDEV(SOUND_MAJOR, dev_list[i].minor),
                                    NULL, "%s", dev_list[i].name);
@@ -574,15 +570,10 @@ static int __init oss_init(void)
                if (!dev_list[i].num)
                        continue;
-                for (j = 1; j < *dev_list[i].num; j++) {
+                for (j = 1; j < *dev_list[i].num; j++)
-                        devfs_mk_cdev(MKDEV(SOUND_MAJOR,
-                                                dev_list[i].minor + (j*0x10)),
-                                        S_IFCHR | dev_list[i].mode,
-                                        "sound/%s%d", dev_list[i].name, j);
                        class_device_create(sound_class, NULL,
                                            MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10)),
                                            NULL, "%s%d", dev_list[i].name, j);
-                }
        }
        if (sound_nblocks >= 1024)
@@ -596,14 +587,11 @@ static void __exit oss_cleanup(void)
        int i, j;
        for (i = 0; i < sizeof (dev_list) / sizeof *dev_list; i++) {
-                devfs_remove("sound/%s", dev_list[i].name);
                class_device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor));
                if (!dev_list[i].num)
                        continue;
-                for (j = 1; j < *dev_list[i].num; j++) {
+                for (j = 1; j < *dev_list[i].num; j++)
-                        devfs_remove("sound/%s%d", dev_list[i].name, j);
                        class_device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10)));
-                }
        }
        
        unregister_sound_special(1);
diff --git a/sound/sound_core.c b/sound/sound_core.c
index 6f849720aef3..7535ec821dcf 100644
--- a/sound/sound_core.c
+++ b/sound/sound_core.c
@@ -44,7 +44,6 @@
 #include <linux/sound.h>
 #include <linux/major.h>
 #include <linux/kmod.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/device.h>
 #define SOUND_STEP 16
@@ -172,8 +171,6 @@ static int sound_insert_unit(struct sound_unit **list, const struct file_operati
        else
                sprintf(s->name, "sound/%s%d", name, r / SOUND_STEP);
-        devfs_mk_cdev(MKDEV(SOUND_MAJOR, s->unit_minor),
-                        S_IFCHR | mode, s->name);
        class_device_create(sound_class, NULL, MKDEV(SOUND_MAJOR, s->unit_minor),
                            dev, s->name+6);
        return r;
@@ -197,7 +194,6 @@ static void sound_remove_unit(struct sound_unit **list, int unit)
        p = __sound_remove_unit(list, unit);
        spin_unlock(&sound_loader_lock);
        if (p) {
-                devfs_remove(p->name);
                class_device_destroy(sound_class, MKDEV(SOUND_MAJOR, p->unit_minor));
                kfree(p);
        }
@@ -570,7 +566,6 @@ static void __exit cleanup_soundcore(void)
        /* We have nothing to really do here - we know the lists must be
           empty */
        unregister_chrdev(SOUND_MAJOR, "sound");
-        devfs_remove("sound");
        class_destroy(sound_class);
 }
@@ -580,7 +575,6 @@ static int __init init_soundcore(void)
                printk(KERN_ERR "soundcore: sound device already in use.\n");
                return -EBUSY;
        }
-        devfs_mk_dir ("sound");
        sound_class = class_create(THIS_MODULE, "sound");
        if (IS_ERR(sound_class))
                return PTR_ERR(sound_class);
author	Linus Torvalds <torvalds@g5.osdl.org>	2006-06-29 17:19:21 -0400
committer	Linus Torvalds <torvalds@g5.osdl.org>	2006-06-29 17:19:21 -0400
commit	602cada851b28c5792339786efe872fbdc1f5d41 (patch)
tree	233d474b74d6038b5bb54a07ad91dd1bb10b0218
parent	82991c6f2c361acc17279b8124d9bf1878973435 (diff)
parent	fee68d1cc0d9bd863e51c16cdcd707737b16bb38 (diff)