Since we moved wakeup preemption back to virtual time, it makes sense to move
the buddy stuff back as well. The purpose of the buddy scheduling is to allow
a quickly scheduling pair of tasks to run away from the group as far as a
regular busy task would be allowed under wakeup preemption.

This has the advantage that the pair can ping-pong for a while, enjoying
cache-hotness. Without buddy scheduling other tasks would interleave destroying
the cache.

Also, it saves a word in cfs_rq.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

The advantage is that vruntime based wakeup preemption has a better
conceptual model. Here wakeup_gran = 0 means: preempt when 'fair'.
Therefore wakeup_gran is the granularity of unfairness we allow in order
to make progress.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

Mysql+oltp and pgsql+oltp peaks are still shifted right. The below puts
the peaks back to 1 client/server pair per core.

Use the avg_overlap information to weaken the sync hint.
Signed-off-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

Mike noticed the current min_vruntime tracking can go wrong and skip the
current task. If the only remaining task in the tree is a nice 19 task
with huge vruntime, new tasks will be inserted too far to the right too,
causing some interactibity issues.

min_vruntime can only change due to the leftmost entry disappearing
(dequeue_entity()), or by the leftmost entry being incremented past the
next entry, which elects a new leftmost (__update_curr())

Due to the current entry not being part of the actual tree, we have to
compare the leftmost tree entry with the current entry, and take the
leftmost of these two.

So create a update_min_vruntime() function that takes computes the
leftmost vruntime in the system (either tree of current) and increases
the cfs_rq->min_vruntime if the computed value is larger than the
previously found min_vruntime. And call this from the two sites we've
identified that can change min_vruntime.
Reported-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

In one of the group load balancer patches:

	commit 408ed066
	Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
	Date:   Fri Jun 27 13:41:28 2008 +0200
	Subject: sched: hierarchical load vs find_busiest_group

The following change:

-               if (max_load - this_load + SCHED_LOAD_SCALE_FUZZ >=
+               if (max_load - this_load + 2*busiest_load_per_task >=
                                        busiest_load_per_task * imbn) {

made the condition always true, because imbn is [1,2].
Therefore, remove the 2*, and give the it a fair chance.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

Fix printk format warning:

  drivers/pci/hotplug/acpiphp_ibm.c:207: warning: format '%08lx' expects type 'long unsigned int', but argument 3 has type 'long long unsigned int'
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
  PCI: remove unused resource assignment in pci_read_bridge_bases()
  PCI hotplug: shpchp: message refinement
  PCI hotplug: shpchp: replace printk with dev_printk
  PCI: add routines for debugging and handling lost interrupts
  PCI hotplug: pciehp: message refinement
  PCI: fix ARI code to be compatible with mixed ARI/non-ARI systems
  PCI hotplug: cpqphp: fix kernel NULL pointer dereference

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (29 commits)
  tcp: Restore ordering of TCP options for the sake of inter-operability
  net: Fix disjunct computation of netdev features
  sctp: Fix to handle SHUTDOWN in SHUTDOWN_RECEIVED state
  sctp: Fix to handle SHUTDOWN in SHUTDOWN-PENDING state
  sctp: Add check for the TSN field of the SHUTDOWN chunk
  sctp: Drop ICMP packet too big message with MTU larger than current PMTU
  p54: enable 2.4/5GHz spectrum by eeprom bits.
  orinoco: reduce stack usage in firmware download path
  ath5k: fix suspend-related oops on rmmod
  [netdrvr] fec_mpc52xx: Implement polling, to make netconsole work.
  qlge: Fix MSI/legacy single interrupt bug.
  smc911x: Make the driver safer on SMP
  smc911x: Add IRQ polarity configuration
  smc911x: Allow Kconfig dependency on ARM
  sis190: add identifier for Atheros AR8021 PHY
  8139x: reduce message severity on driver overlap
  igb: add IGB_DCA instead of selecting INTEL_IOATDMA
  igb: fix tx data corruption with transition to L0s on 82575
  ehea: Fix memory hotplug support
  netdev: DM9000: remove BLACKFIN hacking in DM9000 netdev driver
  ...

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  math-emu: Fix thinko in _FP_DIV
  math-emu: Fix signalling of underflow and inexact while packing result.
  sparc: Add checkstack support
  sparc: correct section of current_pc()
  sparc: correct section of apc_no_idle
  sparc64: Fix race in arch/sparc64/kernel/trampoline.S

This cleanup removes the resource assignment in pci_read_bridge_bases()
since it has taken care by pci_alloc_child_bus() when allocating the bus:

        /* Set up default resource pointers and names.. */
        for (i = 0; i < PCI_BRIDGE_RES_NUM; i++) {
                child->resource[i] = &bridge->resource[PCI_BRIDGE_RESOURCES+i];
                child->resource[i]->name = child->name;
        }
Signed-off-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

This patch refines messages in shpchp module.  The main changes are as
follows:

 - remove the trailing "."
 - remove __func__ as much as possible
 - capitalize the first letter of messages
 - show PCI device address including its domain
Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

This patch replaces printks within shpchp module with dev_printks.
Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

* git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6:
  ide: drivers/ide/generic.c -> drivers/ide/ide-pci-generic.c
  ide-disk: set non-rotational queue flag for SSD and CF devices
  ide-cd: add TEAC CD-224E to the NO_AUTOCLOSE list
  ide: Add tx4938ide driver (v2)
  TXx9: Add TX4938 ATA support (v3)
  ide: Add tx4939ide driver (v6)
  ide: two more pci_ioremap_bar() conversions
  pci: use pci_ioremap_bar() in drivers/ide
  sgiioc4: use ide_host_add() (take 2)
  sgiioc4: fix error cleanup path (take 2)

* 'for-linus' of git://git.o-hand.com/linux-rpurdie-leds:
  leds/acpi: Fix merge fallout from acpi_driver_data change
  leds: Simplify logic in leds-ams-delta
  leds: Fix trigger registration race
  leds: Fix leds-class.c comment
  leds: Add driver for HP harddisk protection LEDs
  leds: leds-pca955x - Mark pca955x_led_set() static
  leds: Remove uneeded leds-cm-x270 driver
  leds: Remove uneeded strlen calls
  leds: Add leds-wrap default-trigger
  leds: Make default trigger fields const
  leds: Add backlight LED trigger
  leds: da903x: Add support for LEDs found on DA9030/DA9034

* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm:
  [ARM] pxa: corgi backlight driver should not select ssp drivers
  [ARM] 5321/1: Kirkwood: fix typo in Makefile
  [ARM] 5320/1: fix assembly constraints in implementation of do_div()
  [ARM] 5318/1: Swap the PRRR and NMRR values in proc-v7.S
  [ARM] 5316/1: AT91: oops (regression) fix on gpio irq
  [ARM] msm: vreg interface to msm7k pmic
  [ARM] msm: dma: various basic dma improvements and bugfixes
  [ARM] msm: clock: provide clk_*() api support for
  [ARM] msm: clean up iomap and devices
  [ARM] msm: add proc_comm support, necessary for clock and power control
  [ARM] msm: rename ARCH_MSM7X00A to ARCH_MSM
  [ARM] pxa/spitz: fix unbalance parenthesis in header file spitz.h
  [ARM] pxa: update {corgi,spitz}_defconfig to favor SPI-based drivers
  [ARM] pxa: fix the corgi_ssp.c dependency issue in {corgi,spitz}_defconfig
  Revert "[ARM] pxa/corgi: remove now unused corgi_ssp.c and corgi_lcd.c"

* 'for-linus' of git://git.o-hand.com/linux-rpurdie-backlight:
  backlight: Add driver for Tabletkiosk Sahara TouchIT-213 Tablet PC
  backlight: da903x: Add backlight driver for DA9030/DA9034
  tosa: add support for bl/lcd driver
  backlight: add support for Sharp SL-6000 LCD and backlight drivers

libata currently has a pretty dumb ATA_MAX_QUEUE loop for finding
a free tag to use. Instead of fixing that up, convert libata to
using block layer tagging - gets rid of code in libata, and is also
much faster.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

We're getting a lot of storage drivers blamed for interrupt misrouting
issues.  This patch provides a standard way of reporting the problem
... and, if possible, correcting it.
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

This patch refines messages in pciehp module.  The main changes are as
follows:

 - remove the trailing "."
 - remove __func__ as much as possible
 - capitalize the first letter of messages
 - show PCI device address including its domain
Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

The original ARI support code has a compatibility problem with non-ARI
devices.  If a device doesn't support ARI, turning on ARI forwarding on
its upper level bridge will cause undefined behavior.

This fix turns on ARI forwarding only when the subordinate devices
support it.
Tested-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

The following patch fixes the regression in 2.6.27 that causes kernel
NULL pointer dereference at cpqphp driver probe time.  This patch should
be backported to the .27 stable series.

Seems to have been introduced by
f46753c5.

The root cause of this problem seems that cpqphp driver calls
pci_hp_register() wrongly. In current implementation, cpqphp driver
passes 'ctrl->pci_dev->subordinate' as a second parameter for
pci_hp_register(). But because hotplug slots and it's hotplug controller
(exists as a pci funcion) are on the same bus, it should be
'ctrl->pci_dev->bus' instead.

Cc: <stable@kernel.org>
Tested-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

Suggested-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

The "TEAC CD-ROM CD-224E" cannot close its tray, so add it to the NO_AUTOCLOSE
list. This will correct the "Can close tray" field of /proc/sys/dev/cdrom/info.
Signed-off-by: Márton Németh <nm127@freemail.hu>
Acked-by: Borislav Petkov <petkovbb@gmail.com>
[bart: minor fixups to patch description]
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

This is the driver for the Toshiba TX4938 SoC EBUS controller ATA mode.
It has custom set_pio_mode and some hacks for big endian.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: ralf@linux-mips.org
Cc: sshtylyov@ru.mvista.com
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Add a helper routine to register tx4938ide driver and use it on
RBTX4938 board.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

This is the driver for the Toshiba TX4939 SoC ATA controller.

This controller has standard ATA taskfile registers and DMA
command/status registers, but the register layout is swapped on big
endian.  There are some other endian issue and some special registers
which requires many custom dma_ops/tp_ops routines and build_dmatable.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: ralf@linux-mips.org
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

based on suggestion from Sergei Shtylyov, there are two more places
where using pci_ioremap_bar() makes sense.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Use the newly introduced pci_ioremap_bar() function in drivers/ide.
pci_ioremap_bar() just takes a pci device and a bar number, with the goal
of making it really hard to get wrong, while also having a central place
to stick sanity checks.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Convert the driver to use ide_host_add() -- this seems to be a straightforward
change which I'm not sure why hasn't been done yet...

While doing this at last, get rid of:

- useless local copy of the 'sgiioc4_port_info' variable;

- unnecessary 'goto' and label...
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: jeremy@sgi.com
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

The driver "forgot" to call iounmap() iff request_mem_region() call failed in
sgiioc4_ide_setup_pci_device()...
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: jeremy@sgi.com
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Resolves build errors with eseries and magician defconfigs (which
make use of the corgi backlight driver.)
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

This is not our bug! Sadly some devices cannot cope with the change
of TCP option ordering which was a result of the recent rewrite of
the option code (not that there was some particular reason steming
from the rewrite for the reordering) though any ordering of TCP
options is perfectly legal. Thus we restore the original ordering
to allow interoperability with/through such broken devices and add
some warning about this trap. Since the reordering just happened
without any particular reason, this change shouldn't cost us
anything.

There are already couple of known failure reports (within close
proximity of the last release), so the problem might be more
wide-spread than a single device. And other reports which may
be due to the same problem though the symptoms were less obvious.
Analysis of one of the case revealed (with very high probability)
that sack capability cannot be negotiated as the first option
(SYN never got a response).
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Reported-by: Aldo Maggi <sentiniate@tiscali.it>
Tested-by: Aldo Maggi <sentiniate@tiscali.it>
Signed-off-by: David S. Miller <davem@davemloft.net>

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
  staging: pcc_acpi: delete obsolete driver

* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (21 commits)
  [SCSI] sd: fix computation of the full size of the device
  [SCSI] lib: string_get_size(): don't hang on zero; no decimals on exact
  [SCSI] sun3x_esp: Convert && to ||
  [SCSI] sd: remove command-size switching code
  [SCSI] 3w-9xxx: remove unnecessary local_irq_save/restore for scsi sg copy API
  [SCSI] 3w-xxxx: remove unnecessary local_irq_save/restore for scsi sg copy API
  [SCSI] fix netlink kernel-doc
  [SCSI] sd: Fix handling of NO_SENSE check condition
  [SCSI] export busy state via q->lld_busy_fn()
  [SCSI] refactor sdev/starget/shost busy checking
  [SCSI] mptfusion: Increase scsi-timeouts, similariy to the LSI 4.x driver.
  [SCSI] aic7xxx: Take the LED out of diagnostic mode on PM resume
  [SCSI] aic79xx: user visible misuse wrong SI units (not disk size!)
  [SCSI] ipr: use memory_read_from_buffer()
  [SCSI] aic79xx: fix shadowed variables
  [SCSI] aic79xx: fix shadowed variables, add statics
  [SCSI] aic7xxx: update *_shipped files
  [SCSI] aic7xxx: update .reg files
  [SCSI] aic7xxx: introduce "dont_generate_debug_code" keyword in aicasm parser
  [SCSI] scsi_dh: Initialize path state to be passive when path is not owned
  ...

Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: fix section mismatch warning - apic_x2apic_phys
  x86: fix section mismatch warning - apic_x2apic_cluster
  x86: fix section mismatch warning - apic_x2apic_uv_x
  x86: fix section mismatch warning - apic_physflat
  x86: fix section mismatch warning - apic_flat
  x86: memtest fix use of reserve_early()
  x86 syscall.h: fix argument order
  x86/tlb_uv: remove strange mc146818rtc include
  x86: remove redundant KERN_DEBUG on pr_debug
  x86: do_boot_cpu - check if we have ESR register
  x86: MAINTAINERS change for AMD microcode patch loader
  x86/proc: fix /proc/cpuinfo cpu offline bug
  x86: call dmi-quirks for HP Laptops after early-quirks are executed
  x86, kexec: fix hang on i386 when panic occurs while console_sem is held
  MCE: Don't run 32bit machine checks with interrupts on
  x86: SB600: skip IRQ0 override if it is not routed to INT2 of IOAPIC
  x86: make variables static

pcc_acpi is based on an old version
of drivers/misc/panasonic-laptop.c
Signed-off-by: Len Brown <len.brown@intel.com>