[PATCH 0/8] Online/offline BSP on x86

[Fenghua Yu]

From: Fenghua Yu <fenghua.yu@xxxxxxxxx>

BSP or CPU0 has been the last obstacle to CPU hotplug on x86. This patch set
implements BSP online and offline and removes this obstacle to CPU hotplug.

Fenghua Yu (8):
  x86, apic.c: Disable irq0 if CPU enables ARAT for local apic timer
  x86/mtrr/main.c: Ask the first online CPU to save mtrr
  x86, i387.c: thread xstate is initialized only on BSP once
  kernel/workqueue.c: unbound work queue rescuer runs on first cpu in
    cpumask_online_cpu
  x86, common.c, smpboot.c: Init BSP during BSP online and don't
    offline BSP if irq is bound to it
  x86, topology.c: Enable CPU0 online/offline
  kernel/power/main.c: Not suspend/resume if CPU0 is offlined
  kernel/cpu.c: Define bsp_hotpluggable variable

 Documentation/kernel-parameters.txt |    7 ++++++
 arch/x86/include/asm/processor.h    |    1 +
 arch/x86/kernel/apic/apic.c         |    5 ++++
 arch/x86/kernel/cpu/common.c        |   13 +++++++++--
 arch/x86/kernel/cpu/mtrr/main.c     |    6 +++-
 arch/x86/kernel/i387.c              |    9 +++++++-
 arch/x86/kernel/smpboot.c           |   38 ++++++++++++++++++++++++++++------
 arch/x86/kernel/topology.c          |   22 +++++++++++++------
 include/linux/cpu.h                 |    2 +
 kernel/cpu.c                        |    5 ++++
 kernel/power/main.c                 |    9 ++++++++
 kernel/workqueue.c                  |    4 +-
 12 files changed, 99 insertions(+), 22 deletions(-)

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