Patch from Andries.Brouwer@cwi.nl

The next patch in the dev_t series eliminates the last applied use
of MAX_BLKDEV - only the definition in major.h remains.

Sneaky as I am, I combine this patch with the fix for an Oops:
On open, raw_open does
	filp->f_dentry->d_inode->i_mapping =
		bdev->bd_inode->i_mapping;
storing a pointer to bdev stuff.
But on release this pointer stayed, the block device is not
referenced anymore and disappears, and the next open references
undefined stuff.
I checked, and this can actually cause an Oops - scenario:

  # raw /dev/raw/raw12 /dev/hdf
  # dd if=/dev/raw/raw12 of=/dev/null bs=512 count=1
  # raw /dev/raw/raw12 0 0
  # dd if=/dev/raw/raw12 of=/dev/null bs=512 count=1

Oops.

More precisely the problem is that dentry_open does
file_ra_state_init(&f->f_ra, inode->i_mapping);
And file_ra_state_init uses mapping->backing_dev_info->ra_pages.
Ugly, to use so much information about the inode even before
the inode has been opened.

In the patch below I reset i_mapping upon release of the raw device.

akpm: I fixed a typo and exported default_backing_dev_info to GPL modules for
this.

This message is the source of 90% of the traffic on linux-smp and is now
starting to fill up kernel bugzilla.

Nobody has ever actually done anything about it and the message is wasting
people's time.  Ingo acked this change.

Patch from Zwane Mwaikambo <zwane@linuxpower.ca>

Scale the buffer which is used for accumulating the /proc/interrupts output.
On large SMP it overflows.

Patch from Jason Lunz <lunz@falooley.org>

When support for the GSET and SSET ethtool ioctls was added to eepro100.c in
2.4.20, the tx lock was overloaded to serialize their use.  Unfortunately,
this lock is only initialized in dev->open(), causing ethtool to deadlock the
machine when used on an unconfigured eepro100 interface.

The fix is to initialize the spinlock at probe time.

show_interrupts() is accidentally modifying the incoming seq_file pointer.
It goes oops if seq_printf() returns non-zero.

Patch from Zwane Mwaikambo <zwane@linuxpower.ca>

On SMP or preemptible kernels, every instance of show_interrupts() is oopsily
racy wrt request_irq() and free_irq().

Fix that up by taking the irq_desc_t's lock while walking the action list.

Patch from Andreas Gruenbacher <agruen@suse.de>

Tony Dziedzic has found two bugs in the extended attributes code. Patches with
explanations are attached.

1: Extended attribute sharing on ext2/ext3 not working

   The mb_cache_entry_insert function constantly returns an -EBUSY error
   instead of 0, which causes the xattr cache that is needed by the xattr
   sharing mechanism on ext2/ext3 to not share anything.  This patch fixes
   the problem.  (It is possible that after applying this fix we will hit
   bugs in code that wasn't used before.)

2: Oops in one of the xattr debug statements: The old_bh variable is NULL
   if an inode that previously had no EA's assigned would share an EA block
   with another inode.  (This was hidden by the xattr sharing bug).

- Fix an error-path leak of memory and a dentry in load_elf_binary()
  (spotted by Oleg Drokin).

- Tidy up the handling of bad executable images: return -ENOEXEC rather
  than 0.  (We've committed suicide anyway, so probably nobody gets to see
  this).

- Fix up the logic in load_aout_interp().  It gets itself all set up to
  return -ENOEXEC but there is in fact no path by which it can do this.  Just
  return ~0UL on errors, like load_elf_interp().

Fix a double-kfree on an ext2 error path.  Reported by Oleg Drokin.

Patch from Kevin Pedretti <pedretti@ieee.org>

The unmap_vmas() logic is designed to chew away at all the pages without
holding off preemption for too long.  But with CONFIG_SMP=y and
CONFIG_PREEMPT=y the number of pages which we batch up between rescheduling
opportunities is not a multiple of HPAGE_SIZE.  So unmap_vmas() ends up
calling unmap_hugepage_range() with a poorly aligned&sized region, and it
goes BUG.

Fix that up by ensuring that we always work across hugepage regions in
HPAGE_SIZE chunks.

Fix up some unchecked copy_to_user()s

Patch from: Shmulik Hen <hshmulik@intel.com>

The following patch fixes a division by zero bug in the bonding module that
happens when transmitting through a bond with no slaves, in the XOR bonding
mode.

Patch from Tom Rini <trini@kernel.crashing.org>

Take CONFIG_SWAP out of the top-level menu into the general setup menu.  Make
it dependent on CONFIG_MMU and common to all architectures.

Patch from Xavier Bru  <Xavier.Bru@bull.net>

If copy_page_range encounters a pte which maps an invalid pageframe it will
proceed to try to add an rmap entry against that page.  This causes oopses
when an application which has mapped an IO device via /dev/mem forks.

Fix that up by correctly skipping the page_add_rmap() for these pte's.

use print_symbol() to decode the offender's program counter.

Patch from Manfred Spraul <manfred@colorfullife.com>

A patch that records the last kfree caller's program counter
and prints that if a poison check fails.

Patch from Petr Vandrovec <vandrove@vc.cvut.cz>

Modifies check_poison function to not only verify that last byte is
POISON_END, but also that all preceeding bytes are either POISON_BEFORE or
POISON_AFTER bytes.

Patch from Hugh Dickins <hugh@veritas.com>

Hugh's patch fixes vm_area_struct slab corruption due to mremap's move_vma
mistaking how do_munmap splits vmas in one case.

Neither of us are very happy with it - it is fragile, and obscure.  Hugh will
revisit this later, but for now it should fix up the potential memory
corruption.

Patch from Ravikiran G Thirumalai <kiran@in.ibm.com>

Makes the disk stats on struct gendisk per-cpu.

Some workloads really, really want to have no readahead.  Databases which are
perfoming small synchronous I/Os against a file which has extremely poor
layout.  Any readahead at all is a lose here.

But the current readahead code refuses to adapt that low.

Fix it up so that we can indeed adaptively disable readahead altogether, and
do not start it again until we have seen max_readahead()'s worth of
consecutive reads.

Patch from Trond Myklebust <trond.myklebust@fys.uio.no>

Implement sendfile() for the NFS client.  This is required for loop-on-NFS
support.

Tasks which throttle in balance_dirty_pages() will loop until the amount of
dirty memory falls below the configured dirty_ratio.

This exposes the possibility that one task could be stuck in there for
arbitrary periods of time due to page dirtying activity by other tasks.

The patch changes the logic so that tasks will break out of the loop if they
have written enough pages, regardless of the current dirty memory limits.

Here "enough" pages is 1.5x the number of pages which they just dirtied.

If the amount of dirty memory in the machine happens to still exceed
dirty_ratio (say, due to MAP_SHARED activity) then the task will again
throttle after dirtying a single page.  But there is now an upper limit on
the time for which a single task will be captured in balance_dirty_pages().

Patch from Andries.Brouwer@cwi.nl

The following patch does the following:

- static const char *blkdevs[MAX_BLKDEV]; disappears
- get_blkdev_list, (un)register_blkdev, __bdevname
  are moved from block_dev.c to genhd.c
- the third "fops" parameter of register_blkdev was unused;
  now removed everywhere
- zillions of places had printk("cannot get major") upon
  error return from register_blkdev; removed all of these
  and inserted a single printk in register_blkdev.

Of course the reason for the patch is that one fixed size
array is eliminated.

I'm getting a lot of cacheline bounce from .text.lock.file_table due to
false sharing of the cahceline. The following patch just aligns the lock
in it's own cacheline.

People keep asking for this info, and Andrew asked me to put it under the
Documentation directory ... provides really simple instructions for taking
a profile so that users can report performance changes in a useful way.

From Andy Whitcroft

Fix the type of get_zholes_size for NUMA-Q

From Andy Whitcroft

Convert physnode_map from an int to a u8 to save cachelines.

From Andy Whitcroft

A few very simple changes in order to make CONFIG_NUMA work everywhere, so
the distros can build one common binary kernel for distributions.

From Andy Whitcroft

Share a common physnode_map structure between NUMA-Q and Summit.

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

This is a minor cleanup.  We currently define and declare the BKL's
kernel_flag spinlock on either SMP or PREEMPT, which means a UP+PREEMPT
machine gets it.

We only need the actual lock on SMP.

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