device_unregister() is intended to be the complement of device_register(), and assumes
most of the functionality of the current put_device(). It should be called by the bus 
driver when a device is physically removed from the system. 

It should _not_ be called from a driver's remove() method, as that remove() method is called
via device_detach() in device_unregister(). 

dev->present is used to flag the physical presence of the device. It is set when the device
is registered, and cleared when unregistered. get_device() checks this flag, and returns
a NULL pointer if cleared. This prevents anyone from obtaining a reference to a device
that has been unregistered (removed), but not yet been freed (e.g. if someone else is 
holding a reference to it).

put_device() BUG()s if dev->present is set. A device should be unregistered before it is 
freed. This will catch people doing it in the wrong order. 

into groveronline.com:/root/bk/linux-acpi

That previous patch got rid of a boot time might_sleep() warning,
but I noticed two later on:

  - kmalloc() needed SLAB_ATOMIC

  - destroying the 'pools' driverfs attribute could sleep too

The clean/simple patch for the second one tweaked an API:

  - pci_pool_create() can't be called in_interrupt() any more.
    nobody used it there, and such support isn't needed; plus
    that rule matches its sibling call, pci_pool_destroy().

  - that made its SLAB_* flags parameter more useless, so it's
    removed and the DMA-mapping.txt is updated.  (this param
    was more trouble than it was worth -- good that it's gone.)

Nobody (even DaveM) objected to those API changes, so I think
this should be merged.

into groveronline.com:/root/bk/linux-acpi

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

This adds initial support for NFS direct I/O in the 2.5 kernel.  many
have asked for this support to be included in 2.5.  this patch does not
provide working NFS direct I/O, but i'm sending what i have now so that
it can be included before October 20.

NFS direct I/O is enabled by its very own kernel config option.  when
enabled, the NFS client won't build to prevent people from using this and
possibly corrupting their NFS files.  later i will send a patch that
finishes the implementation.

[ Config option currently disabled ]

This makes the NFS client copy the page->index field into its read and
write request structures (struct nfs_page) when setting up I/O on a
page.  this makes it possible for NFS direct I/O support to reuse
existing NFS client subroutines, and helps eventually allow NFS I/O to
and from anonymous pages.  it is a prerequisite for NFS direct I/O
support.

This makes file credentials available to the ->direct_IO address space
operation by replacing its struct inode* argument with a struct file*
argument.  this patch is a prerequisite for NFS direct I/O support.  it
breaks the raw device driver.

Get rid of name and bdev in dasd_device_t structure.

IDE uses u32 as being an io port, which is wrong. We even have an arch
type for this, ide_ioreg_t. Use that.

Also fix a bad printk() in ide-disk, introduced with the swsusp stuff.

This is a simple fix to aio.c:__aio_get_req() where it appears that
a freed aio request could be incorrectly returned in the error path,

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

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

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

into nuts.ninka.net:/home/davem/src/BK/net-2.5

into hostme.bitkeeper.com:/ua/repos/j/jfs/linux-2.5

It does not make sense for all events (like timer expiry), but for
some uses it's helpful for the called routine to return an error
code.

Do dial-out via the state machine as well, and add a state
to wait for the D-channel hangup as well before unbinding
the isdn_net_dev.

Plus assorted compile/warning fixes.

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

into nuts.ninka.net:/home/davem/src/BK/net-2.5

And also move MODULE_LICENSE from aarp.c to ddp.c, as its there
that the module_init/exit is.

Also added MODULE_AUTHOR and MODULE_DESCRIPTION.

into nuts.ninka.net:/home/davem/src/BK/sparc-2.5

into nuts.ninka.net:/home/davem/src/BK/net-2.5

Thanks to Al Viro for reviewing this, this also fixes the
example that made me do this copy'n'paste brain fart.

Also some CodingStyle cleanups.

Armin Schindler converted the driver to use tasklets, which makes more
sense than the new work_struct stuff here.

Add a finite state machine helper module, which is basically copied over
from the hisax driver with a little bit of beautification.

Eventually, all ISDN should be converted to using these routines.

No code change, just move the call control state machine from
isdn_net.c to isdn_net_lib.c

This removes the obsolete O_TARGET and cleans up the Config.* and *.c
files to have a unique CONFIG_BLUEZ prefix.  Additional two missing help
entries are added.

Additionally, a little further cleanup, use the same timer
for incoming call timeout no matter if D- or B-channel connect
times out.

Simplify idle hang-up code.

For some unknown reason, isdn_net kept two pointers back from the channel
to the associated isdn_net_dev, one is enough, though.