This patch works around a gcc 3.3 bug on AMD64.  On AMD64 the
get_current() function expands to a switch on sizeof which has to be
optimized away by the compiler, finally yielding an inline assembler
statement.  In some cases it seems to get that wrong and forgets to
reference and use the argument.  I have only seen it happen in
binfmt_elf so far.

Work around by just computing "current" once.

hugetlbfs was unnecessarily verbose, and didn't even print out the right
thing if given invalid mount options.

Just return EINVAL.

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

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

This reduces the number of warnings from Linus' `check' program
for stuff in arch/ppc.

into samba.org:/stuff/paulus/kernel/for-linus-ppc

into samba.org:/stuff/paulus/kernel/for-linus-ppc

An update to the ppc64 MAINTAINERS entry.

Trivial patch: when these were introduced cpu.h didn't exist.

 This adds a /proc/kallsyms if you have CONFIG_KALLSYMS in your
kernel.  The output is nm-like, with symbols in caps (global) if
exported using EXPORT_SYMBOL, rather than the normal static
vs. non-static differentiation.

This is useful for things like performance monitoring tools (profiling
etc) that want to match addresses to names in user space.

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

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

  - added AZT3328 driver
  - added Terratec Aureon support to ICE1724 driver
  - fixed possible PCI posting problems
    - ENS1370, ENS1371, FM801, ICE1712, ICE1724, VIA82xx
  - AC'97 code
    - added new IDs
    - fixed typo in S/PDIF code
    - C-Media related fixes
  - USB driver
    - added nrpacks module option
    - added hack for AudioTrak Optoplay
    - removed OLD_USB stuff

The loop thread is getting permanently stuck in balance_dirty_pages()
(nr_writeback is exceeded) because the loop thread itself is responsible for
completing writeback on behalf of higher layers.

So we need to take that out: don't throttle the loop thread.  Throttle the
tasks which are generating all the dirty data instead.

From: Matthew Dobson <colpatch@us.ibm.com>

This resurrects the old /proc/sys/vm/free_pages functionality: the ability to
tell page reclaim how much free memory to maintain.

This may be needed for specialised networking applications, and it provides
an interesting way to stress the kernel: set it very low so atomic
allocations can easily fail.

Also, a 16G ppc64 box currently cruises along at 1M free memory, which is
surely too little to supporthigh-speed networking.  We have not changed that
setting here, but it is now possible to do so.

The patch also reduces the amount of free memory which the VM will maintain
in ZONE_HIGHMEM, as it is almost always wasted memory.

From: Dave Olien <dmo@osdl.org>

The change makes the transfer rate numbers come out right for the fibre
channel version of this controller.

For 1G FC, the NegotiatedSynchronousMegaTransfers is 1000, and the
NegotiatedDataWidthBIts is 1.  The old code assumed NegotiatedDataWidthBits
was always either 8 or 16.  The new code is simpler, and does the
calculation correctly for all cases.

From: Matthew Dobson <colpatch@us.ibm.com>

This patch implements a generic version of the nr_cpus_node(node) macro
implemented for ppc64 by the previous patch.

The generic version simply computes an hweight of the bitmask returned by
node_to_cpumask(node) topology macro.

This patch also adds a generic_hweight64() function and an hweight_long()
function which are used as helpers for the generic nr_cpus_node() macro.

This patch also adds a for_each_node_with_cpus() macro, which is used in
sched_best_cpu() in kernel/sched.c to fix the original problem of
scheduling processes on CPU-less nodes.  This macro should also be used in
the future to avoid similar problems.

Test compiled and booted by Andrew Theurer (habanero@us.ibm.com) on both
x440 and ppc64.

From: Matthew Dobson <colpatch@us.ibm.com>

This patch defines a topology macro for ppc64, nr_cpus_node(node) which
returns the number of CPUs on 'node'.  This patch also adds code to compute
and store these values in an array for quick lookup.

Test compiled and booted by Andrew Theurer (habanero@us.ibm.com) on both
x440 and ppc64.

From: Matthew Dobson <colpatch@us.ibm.com>

sched_best_cpu schedules processes on nodes based on node_nr_running.  For
CPU-less nodes, this is always 0, and thus sched_best_cpu tends to migrate
tasks to these nodes, which eventually get remigrated elsewhere.

This patch adds include/linux/topology.h, and modifies all includes of
asm/topology.h to linux/topology.h.  A subsequent patch in this series adds
helper functions to linux/topology.h to ensure processes are only migrated
to nodes with CPUs.

Test compiled and booted by Andrew Theurer (habanero@us.ibm.com) on both
x440 and ppc64.

From: Ingo Molnar <mingo@elte.hu>

Apparently this BUG is triggerable due to correct and expected events.

As "Dmitry A.  Fedorov" <D.A.Fedorov@inp.nsk.su> points out,
get_current_user() has a local variable __user which conflicts with the
sparse tagging.  But get_current_user() has no callers.

From: Adam Belay <ambx1@neo.rr.com>

- cs4236 doesn't check if the memory for the resource table was
  successfully allocated.

- Add comment about slab ctor behaviour (Ingo Oeser)

- mm/slab.c:fprob() shows up in profiles a lot.  Rename it to something more
  meaningful.

- fatfs printk warning fix (Randy Dunlap)

- give the the time interpolator list and lock file-static scope (hch)

From: Christoph Hellwig <hch@lst.de>

Currently the tty code abuses tty_driver.name as the prefix for the devfs
names of the ttys.  This is a very bad idea because it means the tty name
changes depending on whether devfs is enabled or not, leading to different
names in /proc/tty/ depending on whether we have devfs or not (and not
whether it actually is mounted!) and a huge amount of ifdefs.

The patch below adds a .devfs_name member instead, similar to the block
device changes a few weeks ago.

From: Samuel Thibault <Samuel.Thibault@ens-lyon.fr>

Still working on kernel facilities for braille devices, the need for being
able to force blanking and unblanking raised: even when a key is pressed, the
screen must remain blank, for privacy of the blind user who is typing on the
keyboard and reading on its braille terminal.

I merely added an ignore_poke variable which is set, and the screen blanked.
Then, poke_blanked_console returns immediatly.  Upon real unblank (because of
an Oops or an explicit tioclinux), ignore_poke is reset to get back to normal
operation mode.

I had to remove the (unnecessary ?) call to unblank_screen from set_selection
to prevent mouse selection unblanking the screen.

I also added a way for processes to know whether the screen is blanked (the
blind user might hence know whether people can read the screen).

From: Samuel Thibault <Samuel.Thibault@ens-lyon.fr>

Some fixes for console blanking: on some laptops, doing VESA blanking after
the bios did an apm blanking because of a screen closure thrashes the
recovery (the video board doesn't seem to have synchronisation registers
correctly initialized, since the LCD panel progressively turns white, maybe
damaging it ?).

I hence moved the schedule for vesa powerdown after the apm blank hook
call, so that if it succeeds, it won't be called.  I also moved the apm
unblank & palette restoration after the vesa unblank, to have a more lifo
scheme (also required, or the screen remains black).

Btw, why del_timer_sync was called twice in timer_do_blank_screen when
vesa_off_interval==0 ?