From: Matthew Wilcox <willy@debian.org>

Here's an update to Documentation/filesystems/Locking.

A `cat /dev/kmem' oopses the kernel.  This is because new Intel
copy_to_user() doesn't handle segfaults against the kernel-side source
address of the copy.

It is not obvious how to fix read_kmem(), and handling faults on either
source or dest is traditional behaviour, so fix it in the copy function by
adding exception table entries for the reads as well as the writes.

From: Francois Romieu <romieu@fr.zoreil.com>

Recent MOD_{INC/DEC}_USE_COUNT removal missed a MOD_DEC_USE_COUNT.

From: Francois Romieu <romieu@fr.zoreil.com>

- silly indentation;
- let's be more user-friendly with manufacturer specific (mis)feature:
  + s/CONFIG_DSCC4_CLOCK_ON_TWO_PORTS_ONLY/CONFIG_DSCC4_PCISYNC/
  + KConfig adequate entry
- broken warning message.

From: Francois Romieu <romieu@fr.zoreil.com>

CCR1 register voodoo: asic handles itself the flow control.

From: Francois Romieu <romieu@fr.zoreil.com>

Workaround for lack of true reset:
- devices/ports are put in silent mode at ifconfig down time but some
  state is kept around to allow 'ifconfig up' issuing at a later time.
  Device specific structures are allocated when the pci asic is
  probed: dscc4_init_ring() moves from dscc4_open() to dscc4_found1().
- try to use reset related board-specific feature at module removal
  time if available. Comments in the code explain the whole story.
  Not a complicated feature but it is unavailable on the cards I own
  and no user gave me feedback -> currently untested.
  It shouldn't harm anyway.

From: Francois Romieu <romieu@fr.zoreil.com>

- more #define for specific bits;
- more scc_patchl use;
- just say no to bozo programming:
  + SCC core _really_ disabled at startup;
  + Interrupts Mask Register setup and SCC core activation are
    done as late as possible (i.e. in dscc4_open());
  + they are reverted if dscc4_open() fails;
  + as well as unconditionnaly in dscc4_close();
- more or less paranoid quirk in Xpr handler.

From: Francois Romieu <romieu@fr.zoreil.com>

More conditional debug messages.

From: Francois Romieu <romieu@fr.zoreil.com>

Clock modes on dscc4 are feature-rich enough to deserve some explanation.

From: Francois Romieu <romieu@fr.zoreil.com>

Short comments so I can figure why things are done this way.

opl3sa2 forgot to initialise the spinlock.

From: NeilBrown <neilb@cse.unsw.edu.au>

The blockdev layer has a concept of 'claiming' a device, so for example it
can be claimed when a filesystem is mounted or when it is included into a
raid array.  Only one subsystem can claim it at a time.

This patch matches this functionality available to user-space via the
O_EXCL flag to open.

This allows user-space programs to easily test if a device is currently
mounted etc, and to prevent a device from being mounted or otherwise
claimed.

From: NeilBrown <neilb@cse.unsw.edu.au>

Current devices can be 'claimed' by filesystems (when mounting) or
md/raid (when being included in an array) or 'raw' or ....
This stop concurrent access by these systems.

However it is still possible for one system to claim the whole device
and a second system to claim one partition, which is not good.

With this patch, when a partition is claimed, the whole device is 
claimed for partitioning.  So you cannot have a partition and the
whole devices claimed at the same time (except if the whole device
is claimed for partitioning).

In a further attempt to prevent dirty pages from being written out from the
LRU, don't write them if they were referenced.  This gives those pages
another trip around the inactive list.  So more of them are written via
balance_dirty_pages().

It speeds up an untar-of-five-kernel trees by 5% on a 256M box, presumably
because balance_dirty_pages() has better IO patterns.

It largely fixes the problem which Gerrit talked about at the kernel summit:
the individual writepage()s of dirty pages coming off the tail of the LRU are
reduced by 83% in their database workload.

I'm a bit worried that it increases scanning and OOM possibilities under
nutty VM stress cases, but nothing untoward has been noted during its four
weeks in -mm, so...

This just reorganizes some ghastly goto-and-retry-spaghetti in the core of
the ext3 block allocator.

I wrote this ages ago in preparation for fixing the find_next_usable_block()
CPU pigginess problem, but that proved to be quite nontrivial.

The patch has been in -mm for a long time and Martin has recently confirmed
that it introduces no performance regression in SDET and kernbench.

- nmi_watchdog documentation typo ("Randy.Dunlap" <rddunlap@osdl.org>)

- ikconfig proc requires CONFIG_PROC_FS ("Randy.Dunlap" <rddunlap@osdl.org>)

- visws build fix (Andrey Panin <pazke@donpac.ru>)

- VM lock ranking comment update

This one snuck in...

 - debugging message for ACPI

 - Intel guys removed it from their 2.4 tree (at my request)

 - it's point-in-time specific (message becomes nearly useless after
   ACPI bug fixes)

 - b/c of the point-in-time issue, it's IMO much more appropriate for a
   vendor kernel (where the message, I agree, may be helpful)

 - can potentially mislead users to the correct cause of root mount failure

 - overall, I disagree with adding messages like this.  The number one
   bug report, by far, for networking drivers is ACPI-related (no
   interrupts delivered).  You don't see me adding "boot with acpi=off"
   messages to the net subsystem.

it was the same as the old request_region(). Not so.

into home.osdl.org:/home/torvalds/v2.5/linux

This is a patch for the video4linux unified zoran driver that has been
in the kernel since 2.4.5 or so.

It fixes the compile issues in the current 2.6.0-test3 unified zoran
driver (current one doesn't compile at all), and also updates its
version to what we have in CVS.  This adds support for new cards (e.g.
LML33R10 from LinuxMediaLabs and DC30+ from Pinnacle), fixes bugs in
cards that were already supported and generally improves capture
reliability.  Changes per file (in detail) are given below. 

i2c-id.h:
  add some new IDs for new i2c drivers

pci_ids.h:
  add PCI IDs for each of the supported cards if it has any

saa7111.c, saa7110.c, adv7175.c, bt819.c, saa7185.c, bt856.c:
  update to whatever we've got in our CVS. For most, these are just
  "easiness" fixes that either add some better debug output, or that make
  maintainance for both 2.6.x and 2.4.x simpler for me. There's also some
  specific changes. E.g., in saa7110.c, we enable the VCR mode bits so we
  get a better image from VCR input. In all of them, we make debugging an
  insmod option rather than a compile-time option (this makes debugging
  for users a *lot* easier). Point is that I just want our latest CVS in
  here. Maintainance is going to be a personal horror-story if it's not.

vpx3220.c, saa7114.c, adv7170.c:
  new i2c ones (for respectively DC10/DC30, LML33R10 and again LML33R10)

zr36067.c:
  removed, the driver is now spread over multiple source files.

zoran*.[ch], zr36057.h
  spread-out source files. Also fixes lots of bugs, can't even start
  naming them all, you don't want that, neither do I. Just assume that it
  works better than it used to - it does.

  Nice things that aren't in the old driver: much more stable, supports
  DC30+, supports LML33R10, has proper locking/semaphores, supports
  multiple opens without races now, adapted to new i2c subsystem, v4l2
  support, Xv (hardware-scaled) overlay support, and a lot more.

  Oh, and this one actually compiles.

videocodec.[ch], zr360{16,50,60}.[ch]:
  new sublayer for the driver to unify how we handle the zr36060 chip
  (DC10(+)/LML33/LML33R10/Buz) and the zr36050/zr36016 (DC30(+)).

MAINTAINERS:
  add me as maintainer (I am).

Kconfig:
  add new cards, plus improve the descriptions.

Makefile:
  d'oh.

Zoran:
  documentation update.

Others:
  I don't think there are any.

Greg has gone over the i2c changes a long time ago, he agreed on all of
them. Gerd is supposed to take care of the v4l part, he has never
complained about any of them. Stability is good, we've fixed most issues
(there's still some out there, but nothing serious), lots better than in
the old driver. Also, the cards work much better than with the old
driver.

getting rid of the simple stuff that hides the serious things. 

This patch brings x86-64 and i386 closer together, eliminating an oops
that LTP test ioperm02.c causes on x86-64.  An IO port permission bitmap
must be followed by an extra 0xff.

(Add comments to that effect, to avoid the problem in the future).

link_path_walk() currently treats the special filenames ".", ".."
and "/" differently in that it does not call down to the filesystem in
order to revalidate the cached dentry, but just assumes that it is
fine.

  For most filesystems this is OK, but it the case of the stateless
NFS, this means that it circumvents path staleness detection, and the
attribute+data cache revalidation code on such common commands as
opendir(".").

This change provides a way to do such revalidation for NFS without
impacting other filesystems. 

Note: the failure to revalidate the path here does not result in a
call to d_invalidate() unlike (all?) other calls to d_revalidate(). It
only results in an ESTALE error being returned to the caller.

- Roadrunner address is defunct
- 3c501/Z85230 are no longer maintained
- Update other stuff because I will be away for a year

into home.osdl.org:/home/torvalds/v2.5/linux

into kernel.bkbits.net:/home/davem/net-2.5