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This patch defines a new switch in fs/Config.in -
  CONFIG_NFS_V4:  enables nfsv4 client

Now that all the hooks are in place, this large patch imports all
of the new code for the NFSv4 client.
  nfs4proc.c   - procedure vectors
  nfs4xdr.c    - XDR
  nfs4state.c  - state bookkeeping (very minimal for now)
  nfs4renewd.c - a daemon (implemented as an rpc_task) to keep
                 state from expiring on the server

Note: The RPCSEC_GSS authentication code is not yet included here.
  For the moment we make do with AUTH_UNIX aka. AUTH_SYS.

  Neither is the code to do upcalls to userland in order to do
  uid/gid <-> name mappings. Instead, stubs have been added to
  translate everything to 'nobody:nobody' == '-2:-2'

Define the new NFSv4 data structure for passing user information
from the 'mount' program in nfs4_mount.h.

If CONFIG_NFS_V4 is defined
        Add code to parse the mount structure into the superblock.
        Declare the NFSv4 filesystem to the VFS.

Further cleanups

Separate the static and dynamic filesystem data retrieval calls as per the
NFSv3 spec. This also simplifies things for NFSv4, since many of the
attributes in the fsinfo+fstat combined call are not mandatory to
implement.

Clean up nfs_fill_super().

Separate the parsing of the nfs_mount_data struct and the
initialization + sanity checking of the resulting super_block.
The latter is now performed in the new function nfs_sb_init().

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It is just a missing include, fixed thus..

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Updates/corrects Documentation/kernel-parameters.txt file.

Yes it's a GCC optimiser bug.  I'm surprised I didn't see it: I tried
a whole heap of different compilers on that code, and had problems
only on the earlier similar code in raid0_run().

I didn't try redhat's compilers (I run debian) but didn't expect the
behaviour to be that different.

Anyway, please apply this patch (which also fixes the chunk overlap
problems).

there was a bug in fysnc_buffers_list() in 2.4 (fixed in 2.4.19) that
could cause the function to return without having written the current
contents of all the buffers.

Obviously, this could be bad for anybody relying on ordering using
O_SYNC or fsync().  If an I/O was already in flight for a particular bh
at the time of the call to fsync_buffers_list(), ll_rw_block() will not
initiate a new I/O even though the contents may have changed.  It is
therefore necessary to wait before the call.  Here's a patch against
2.5.42 that applies the same fix.

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Rename queue_depth to current_queue_depth so that:

A) we represent the true purpose of the variable
B) we catch anyone using it wrongly

This patch for dpt_i2o fixes TCQ stuff, but doesn't solve DMA mapping
issues (so it still doesn't work, but it's not because of TCQ).

Getting around to fixing DMA mapping API issues is much more work per
driver than the TCQ stuff, so I'm putting it off until later.

dpti.h:
  Update template
dpt_i2o.c:
  Update to new TCQ scheme

aic7xxx_linux_host.h:
  Update host template
aic7xxx_linux.c:
  Update to new TCQ scheme

linit.c:
  Update to use slave_attach

eata.h:
  Update template
eata.c:
  Add slave_attach and new TCQ method

qla1280.h:
  Update device template
qla1280.c:
  Update to use slave_attach for setting queue depth

advansys.h:
  Update host template to include slave_attach
advansys.c:
  Update to use slave_attach instead of select_queue_depths

drivers/scsi/esp.c:
  Fix the build.
scsi.h:
  Add struct list_head items for future (but soon) use
hosts.h:
  Remove select_queue_depths from host struct, add struct list
  stuff for proper list linking of host structs
hosts.c:
  Don't touch select_queue_depths any longer

ips.h:
  Since we now have proper tagged depth setting, make
  the cmd_per_lun value reasonable for untagged devices
  like it is suppossed to be.

More scsi TCQ updates, tweak to ServeRAID, tweak scsi_scan, make BusLogic
use new method

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- switch to using scsi_ioctl() for drive door locking and unlocking
  instead of private code
- use a driver internal flag to save the reset status until tape is
  positioned into known location
- set driver state properly for all partitions after reset
- change put_device() to driver_unregister() in st_detach()
- C99 initializer changes (from Art Haas)

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This is my current futex patchset against BK-curr.  It mostly includes
must-have crash/correctness fixes from Martin Wirth, tested and reworked
somewhat by myself:

 - crash fix: futex_close did not detach from the vcache. Detach cleanups.
   (Martin Wirth)

 - memory leak fix: forgotten put_page() in a rare path in __pin_page().
   (Martin Wirth)

 - crash fix: do not do any quickcheck in unqueue_me(). (Martin, me)

 - correctness fix: the fastpath in __pin_page() now handles reserved
   pages the same way get_user_pages() does. (Martin Wirth)

 - queueing improvement: __attach_vcache() now uses list_add_tail() to
   avoid the reversal of the futex queue if a COW happens. (Martin Wirth)

 - simplified alignment check in sys_futex. (Martin Wirth)

 - comment fix: make it clear how the vcache hash quickcheck works. (me)

Make dcookies use a stable size regardless of whether we're
on a 32-bit or 64-bit platform.

Finally, add the i386 timer-interrupt and perfctr drivers for i386

Add the oprofile core.  The core design is very similar to that we
discussed in private mail.  The nasty details should be documented in
the patch below.

Add the MSR defines oprofile uses

This provides a simple api to let oprofile hook into the NMI interrupt
for the perfctr profiler.

This implements a simple hook into the profiling timer for x86 so that
non-perfctr machines can still use oprofile.  This has proven useful for
laptops and the like.

It also reduces header dependencies a bit by centralising readprofile
code

This implements the persistent path-to-dcookies mapping, and adds a
system call for the user-space profiler to look up the profile data, so
it can tag profiles to specific binaries.

This implements the simple hooks we need to catch unmappings, and to
make sure no stale task_struct*'s are ever used by the main oprofile
core mechanism.  If disabled, it compiles to nothing.

Quite a few drivers don't need ->open() anymore - all it did was checking
that minor is good (== gendisk exists).  That is handled by generic code
now...

There we go - now we can put a reference to gendisk into block_device.  Which
we do in do_open().  Most of the callers of get_gendisk() are simply using
bdev->bd_disk now (and most of the put_disk() calls introduced on previous
step disappear).  We also put that pointer into struct request - ->rq_disk.
That allows to get rid of disk_index() kludges in md.c (we simply count
relevant IO in the struct gendisk fields) and kill the export of get_gendisk().
	Notice that by now we can move _all_ IO counters into gendisk.  That
will kill a bunch of per-major arrays and more importantly, allow to merge
sard in clean way.  FWIW, we probably could show them as disk/partitions
attributes in driverfs...