This reverts commit 09fe58356d148ff66901ddf639e725ca1a48a0af.
http://bugzilla.kernel.org/show_bug.cgi?id=8283

Signed-off-by: Len Brown <len.brown@intel.com>

Needed for any architecture that claims ARCH_APICTIMER_STOPS_ON_C3,
not just i386.

I'm hoping Thomas will clean this up a bit later..

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

It turned out that it is almost impossible to trust ACPI, BIOS & Co.
regarding the C states. This was the reason to switch the local apic
timer off in C2 state already. OTOH there are sane and well behaving
systems, which get punished by that decision.

Allow the user to confirm that the local apic timer is trustworthy in C2
state. This keeps the default behaviour on the safe side.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
  ACPI: IA64: fix %ll build warnings
  ACPI: IA64: fix allnoconfig build
  ACPI: Only use IPI on known broken machines (AMD, Dothan/BaniasPentium M)
  ACPI: ibm-acpi: allow module to load when acpi notifiers can't be set (v2)
  ACPI: parse 2nd MADT by default
  ACPICA: revert "acpi_serialize" changes
  sony-laptop: MAINTAINERS fix entry, add L: and W:
  ACPI: resolve HP nx6125 S3 immediate wakeup regression
  ACPI: Add support to parse 2nd MADT

The local APIC timer stops to work in deeper C-States.  This is handled by
the ACPI code and a broadcast mechanism in the clockevents / tick managment
code.

Some systems do not expose the deeper C-States to the kernel, but switch
into deeper C-States behind the kernels back.  This delays the local apic
timer interrupts for ever and makes the systems unusable.

Add a command line option to disable the local apic timer and a dmi
quirk for known broken systems.

Andi sayeth:

  While not wrong by itself i think it is still better to use some heuristic
  -- like "has battery in ACPI" With the DMI table if the problem is more wide
  spread we will just continue extending it.

  But anyways should be ok now for .21 although I'm not really happy with
  it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: john stultz <johnstul@us.ibm.com>
Grudgingly-acked-by: Andi Kleen <ak@suse.de>
Cc: Len Brown <lenb@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

http://bugzilla.kernel.org/show_bug.cgi?id=7465

Signed-off-by: Len Brown <len.brown@intel.com>

When a BIOS bug presents multiple APIC/MADTs,
Linux currently uses the 1st and ignores the 2nd.

But some machines work better if we use the 2nd.

http://bugzilla.kernel.org/show_bug.cgi?id=7465

Add a warning and boot parameter "acpi_apic_instance=2"
to allow parsing the 2nd.

No change to default behaviour in this patch.

Signed-off-by: Len Brown <len.brown@intel.com>

* master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6:
  sh: Kill off I/O cruft for R7780RP.
  sh: Revert lazy dcache writeback changes.
  sh: Enable SM501 support for RTS7751R2D.
  sh: Use L1_CACHE_BYTES for .data.cacheline_aligned.
  sysctl: Support vdso_enabled sysctl on SH.
  sh: Fix kernel thread stack corruption with preempt.
  doc: Add SH to vdso and earlyprintk in kernel-parameters.txt
  sh: Fix sigmask trampling in signal delivery.
  sh: Clear UBC when not in use.

Signed-off-by: Bernhard Walle <bwalle@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>