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

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

into penguin.transmeta.com:/home/penguin/torvalds/repositories/kernel/linux

This also shows how to add files to the initramfs build, but is 
commented out.

Patch originally done by Kai.

into penguin.transmeta.com:/home/penguin/torvalds/repositories/kernel/linux

Fix oops in getdfs when null path passed in on mount.  Fix oops when changed readsize caused readpages problem.  Add support for altering rsize so can reduce pages read across net
below default of 4