Xen devel - Feb 2009 - [GIT PULL] x86: unify some of kernel/irq*.c

These changes factor out the differences between 32 and 64-bit do_IRQ 
and unify the rest. Unfortunately there are still quite a few other 
differences (like interrupt stack handling) which preclude further easy 
unification.

Thanks,
    J

The following changes since commit f21daa4d04885a34d1972afa9f82a8aebb6152bb:
  Ingo Molnar (1):
        Merge branch ''out-of-tree''

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git
jsgf/x86/unify-irq

Jeremy Fitzhardinge (2):
      x86: add handle_irq() to allow interrupt injection
      x86: unify do_IRQ()

 arch/x86/include/asm/irq.h |    4 +++-
 arch/x86/kernel/irq.c      |   38 ++++++++++++++++++++++++++++++++++++++
 arch/x86/kernel/irq_32.c   |   29 +++++------------------------
 arch/x86/kernel/irq_64.c   |   34 +++++-----------------------------
 4 files changed, 51 insertions(+), 54 deletions(-)



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* Jeremy Fitzhardinge <jeremy@goop.org> wrote:
> These changes factor out the differences between 32 and 64-bit do_IRQ  
> and unify the rest. Unfortunately there are still quite a few other  
> differences (like interrupt stack handling) which preclude further easy  
> unification.
>
> Thanks,
>    J
>
> The following changes since commit
f21daa4d04885a34d1972afa9f82a8aebb6152bb:
>  Ingo Molnar (1):
>        Merge branch ''out-of-tree''
>
> are available in the git repository at:
>
>  git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git
jsgf/x86/unify-irq
>
> Jeremy Fitzhardinge (2):
>      x86: add handle_irq() to allow interrupt injection
Why doesnt Xen use a special irqchip, instead of this private hook/layer
in the lowlevel x86 arch level?

irqchip is at least well-specified and widely used. do_IRQ() internals
on the other hand will become a Xen special quickly. Also, adding a
needless function call there obviously does not help native performance.

	Ingo

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