The following patch corrects a bug where rmap would continue trying to
swap out a page even after it failed on one pte, which could result in
leaked pte chains and a bug when exiting applications which use mlock().

The bug was tracked down by Christian Ehrhardt, the reason it wasn't
found earlier was a subtlety in the code, so I've taken the liberty of
changing Christian's patch into something more explicit, we shouldn't
let this one happen again ;)

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

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

Misc.  compile fixes, xd.c switched to per-disk gendisks, Alan's 2.4
fixes for xd.c ported.

DAC960 switched to per-disk gendisks.

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

The s/at_addr/atalk_addr/ in atalk.h broke the compilation of
drivers/net/appletalk/*. The patch below fixes it. From Adrian Bunk.

3 TLS entries, 9 cycles copying and no branches in the context-switch
path. The patch also adds Christoph's suggestion and renames
modify_ldt_ldt_s (yuck!) to user_desc.

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

- page-size PTE directory with 16-word pmd_t as suggested by RMK and Riel
- support for 2.5.x softirq infrastructure
- other miscellanea

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

Well the optimum solution there would be to create and use
`inc_preempt_count_non_preempt()'.  I don't see any
way of embedding this in kmap_atomic() or copy_to_user_atomic()
without loss of flexibility or incurring a double-inc somewhere.

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

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

Fix a race between set_page_dirty() and truncate.

The page could have been removed from the mapping while this CPU is
spinning on the lock.  __free_pages_ok() will go BUG.

This has not been observed in practice - most callers of
set_page_dirty() hold the page lock which gives exclusion from
truncate.  But zap_pte_range() does not.

A fix for this has been sent to Marcelo also.

Some direct IO fixes from Badari Pulavarty.

- off-by-one in the bounds checking in blkdev_get_blocks().

- When adding more blocks into a bio_vec, account for the current
  offset into that bio_vec.

- Fix a total ballsup in the code which calculates the total number
  of pages which are about to be put under IO.

Forward port of get_user_pages() change from 2.4.

- If the vma is marked as VM_IO area then fail the map.

  This prevents kernel deadlocks which occur when applications which
  have frame buffers mapped try to dump core.  Also prevents a kernel
  oops when a debugger is attached to a process which has an IO mmap.

- Check that the mapped page is inside mem_map[] (pfn_valid).

- inline follow_page() and remove the preempt_disable()s.  It has
  only a single callsite and is called under spinloclk.

The patch from Stephen Tweedie allows users to modify the journal
commit interval for the ext3 filesystem.

The commit interval is normally five seconds.  For portable computers
with spun-down drives it is advantageous to be able to increase the
commit interval.

There may also be advantages in decreasing the commit interval for
specialised applications such as heavily-loaded NFS servers which are
using synchronous exports.

The laptop users will also need to increase the pdflush periodic
writeback interval (/proc/sys/vm/dirty_writeback_centisecs), because
the `kupdate' activity also forces a commit.

To specify the commit interval, use

	mount -o commit=30 /dev/hda1 /mnt/whatever

or
	mount -o remount,commit=30 /dev/hda1

The commit interval is specified in units of seconds.

This is the first of three patches which reduce the amount of
kmap/kunmap traffic on highmem machines.

The workload which was tested was RAM-only dbench.  This is dominated
by copy_*_user() costs.

The three patches speed up my 4xPIII by 3%

The three patches speed up a 16P NUMA-Q by 100 to 150%

The first two patches (copy_strings and pagecache reads) speed up an
8-way by 15%.  I expect that all three patches will speed up the 8-way
by 40%.

Some of the benefit is from reduced pressure on kmap_lock.  Most of it
is from reducing the number of global TLB invalidations.


This patch fixes up copy_strings().  copy_strings does a huge amount of
kmapping.  Martin Bligh has noted that across a kernel compile this
function is the second or third largest user of kmaps in the kernel.

The fix is pretty simple: just hang onto the previous kmap as we we go
around the loop.  It reduces the number of kmappings from copy_strings
by a factor of 30.

Patch from Zwane which fixes a transceiver problem on his 3c905B.

Apparently the 905B's MII status register is saying that it doesn't
need preamble, but the datasheet says that it does.  So add a 905B
override for that in the device table.

This could break other 3c905B's.  I don't know.  There's only one way
to find out.

This patch has been verified to apply cleanly to 2.5.30

This patch fixes a build warning in smp.h.  register_cpu_notifier uses
struct notifier_block in its argument list.  Unfortunately, there are
places where smp.h is included before the definition of this structure.