[PATCH 0/2] Reinstate irq alloc/dealloc locking patch

[Boris Ostrovsky]

Original version of that patch (commit a89941816726) had to be reverted
due to Xen allocating irqs in its cpu_up ops.

The first patch moves allocations into hotplug notifiers and the second
one restores the original patch (with minor adjustments to new hotplug
framework)

Boris Ostrovsky (2):
  xen/x86: Move irq allocation from Xen smp_op.cpu_up()
  hotplug: Prevent alloc/free of irq descriptors during cpu up/down
    (again)

 arch/x86/kernel/smpboot.c |   11 ---------
 arch/x86/xen/enlighten.c  |   53 +++++++++++++++++++++++++++++++++++++-------
 arch/x86/xen/smp.c        |   45 +------------------------------------
 arch/x86/xen/smp.h        |    3 ++
 kernel/cpu.c              |    8 ++++++
 5 files changed, 57 insertions(+), 63 deletions(-)