[PATCH] devfs: Remove devfs from the kernel tree

This is the first patch in a series of patches that removes devfs
support from the kernel.  This patch removes the core devfs code, and
its private header file.
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

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/

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>

fs/devfs/Makefile

-#
-# Makefile for the linux devfs-filesystem routines.
-#
-
-obj-$(CONFIG_DEVFS_FS) += devfs.o
-
-devfs-objs := base.o util.o
-

fs/devfs/util.c

-/*  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);

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)

include/linux/devfs_fs.h

-#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  */

include/linux/devfs_fs_kernel.h

@@ -4,25 +4,8 @@
 #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;
@@ -53,5 +36,4 @@ static inline void mount_devfs_fs(void)
 {
 	return;
 }
-#endif				/*  CONFIG_DEVFS_FS  */
 #endif				/*  _LINUX_DEVFS_FS_KERNEL_H  */