In order to handle the case insensitivity issues of NTFS with regards to the
dcache and the dcache requiring only one dentry per directory, we deal with
dentry aliases that only differ in case in ->ntfs_lookup() while maintining
a case sensitive dcache. This means that we get the full benefit of dcache
speed when the file/directory is looked up with the same case as returned by
->ntfs_readdir() but that a lookup for any other case (or for the short file
name) will not find anything in dcache and will enter ->ntfs_lookup()
instead, where we search the directory for a fully matching file name
(including case) and if that is not found, we search for a file name that
matches with different case and if that has non-POSIX semantics we return
that. We actually do only one search (case sensitive) and keep tabs on
whether we have found a case insensitive match in the process.

To simplify matters for us, we do not treat the short vs long filenames as
two hard links but instead if the lookup matches a short filename, we
return the dentry for the corresponding long filename instead.

In ->ntfs_lookup() we distinguish three cases:

1) @dent perfectly matches (i.e. including case) a directory entry with a
   file name in the WIN32 or POSIX namespaces. In this case
   ntfs_lookup_inode_by_name() will return with name set to NULL and we
   just d_add() @dent.
2) @dent matches (not including case) a directory entry with a file name in
   the WIN32 namespace. In this case ntfs_lookup_inode_by_name() will return
   with name set to point to a kmalloc()ed ntfs_name structure containing
   the properly cased little endian Unicode name. We convert the name to the
   current NLS code page, search if a dentry with this name already exists
   and if so return that instead of @dent. The VFS will then destroy the old
   @dent and use the one we returned. If a dentry is not found, we allocate
   a new one, d_add() it, and return it as above.
3) @dent matches either perfectly or not (i.e. we don't care about case) a
   directory entry with a file name in the DOS namespace. In this case
   ntfs_lookup_inode_by_name() will return with name set to point to a
   kmalloc()ed ntfs_name structure containing the mft reference (cpu endian)
   of the inode. We use the mft reference to read the inode and to find the
   file name in the WIN32 namespace corresponding to the matched short file
   name. We then convert the name to the current NLS code page, and proceed
   searching for a dentry with this name, etc, as in case 2), above.

Also, minor updates/fixes to docs and comments.

- Remove unused source file fs/ntfs/attraops.c.
- Remove show_inodes mount option(s), thus dropping support for
  displaying of short file names.
- Remove deprecated mount option posix.
- Restore show_sys_files mount option.
- Add new mount option case_sensitive, to determine if the driver treats
  file names as case sensitive or not. If case sensitive, create file names
  in the POSIX namespace. Otherwise create file names in the WIN32
  namespace. By default, or when case_sensitive is set to FALSE, files
  remain accessible via their short file name, if it exists.
- Add additional argument to ntfs_lookup_inode_by_name() in which we
  return information about the matching file name if the case is not
  matching or the match is a short file name. See comments above the
  function definition for details.

Didn't get the net/ conversion quite right, and apparently overlooked
one subdir in sound/. Now fixed.

Use the new

	obj-$(CONFIG_FOO) += foo/

syntax to descend into a subdir and link in the result, if
CONFIG_FOO=y.

Build the headers only when we need them during the build, not always
at 'make dep' time.

We use O_TARGET everywhere else, so let's just convert the remaining
users (They get the implicit built-in.o O_TARGET now)

(plus a bit of rearranging in the ISDN Makefiles) 

If a Makefile defines neither O_TARGET nor L_TARGET, let's assume a
default of 'built-in.o'. The goal of this is, of course, to eventually
get rid of O_TARGET completely.

 - move the contents of bdev_get_queue() into do_open() and
   check_partitions() and cache the result in new field of struct
   block_device

 - clean it at the same places that reset ->bd_op, etc.

 - make bdev_get_queue() return cached pointer.

 - kill the last caller of get_hardsect_size() (switching it to
   bdev_hardsect_size()).

 - kill blk_get_queue() and switching to bdev_get_queue()

into home.transmeta.com:/home/torvalds/v2.5/linux

  - make sure return codes are negative (i.e. return -ENOMEM and not return ENOMEM et al)

into home.transmeta.com:/home/torvalds/v2.5/linux

into home.transmeta.com:/home/torvalds/v2.5/linux

Fixes a warning in ieee1394_types.h and an error in include/linux/usb.h

into tp1.ruhr-uni-bochum.de:/home/kai/kernel/v2.5/linux-2.5.misc

This kills unneccessary include from ide-disk.c, kills #ifdef from
reiserfs/journal.c, makes suspend_device local as it should be,
abstains from suspending devices two times in a row (typo), and makes
sure we do not run_task_queue() while we hold spinlock.

I asked Gabor if he'd like me to maintain swsusp, and he liked that
idea [<quote>Would you please take over maintaining? I offered this in
the list a while ago anyway.</quote>].

These are cleanups. They do not change any code, except killing
printk's.

into home.transmeta.com:/home/torvalds/v2.5/linux

 - Apply host chip driver cleanups by Bartomiej Zonierkiewicz.

 - Take the draft device type driver implementation from Adam Richter and make
    it actually work with some of the drivers we have at hand. Quite a lot
    of it was fixed by me as well to have the desired effects.

    We have added a attach method for the sub device type drivers to make it
    possible dor sub device type drivers to attach devices to the overall
    infrastructure. UNIX has something like this SCSI code is implementing
    something like this, just for some unknown reasons Linux block device
    operations don't have it...

 - ide_drive_t is finally gone. Please use struct ata_device instead.

    Hint the ide.h specific byte type should go over time as well, sine there
    is no need to invent something already handled by the kernel. Please use
    the unambigious u8 type instead where possible.

 - Add a bit of documentation about cabling issues. ide.txt needs a lot of
   improvement at some time still.