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[patch 00/14] x86/apic: Implement single target IPI callback

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Linus provided a implementation for this for x2apic_cluster and
mumbled at http://marc.info/?l=linux-kernel&m=144660325518209 :

> Side note, I have an *old* patch that I think simplifies the
> (reasonably common) case of sending IPI's to individual CPU's. That's
> done by the "reschedule ipi" in particular.
>
> That's something that is trivially done on the x2apic, but that the
> mask-based interfaces makes insanely complicated.
> 
> I have *not* rebased this on top of modern kernels so it may not
> actually work as a patch any more, because I'm just sending this out
> as a "Hmm, what do you guys think" rather than a real submission.

I thought it's worthwhile so I had a look at the other apic
implementations and all but apic_default and apic_flat can be
converted halfways simple to provide a single target callback.

The following series does that and gets rid of the wrapper in the call
site at the end.

Compiles and didn't explode when booting it, so it must be perfect :)

Thanks,

	tglx

---

 arch/x86/include/asm/apic.h           |    1 +
 arch/x86/include/asm/ipi.h            |    2 ++
 arch/x86/kernel/apic/apic_flat_64.c   |   19 +++++--------------
 arch/x86/kernel/apic/apic_noop.c      |    2 ++
 arch/x86/kernel/apic/apic_numachip.c  |    2 ++
 arch/x86/kernel/apic/bigsmp_32.c      |   10 +++-------
 arch/x86/kernel/apic/ipi.c            |   18 ++++++++++++++++++
 arch/x86/kernel/apic/probe_32.c       |    1 +
 arch/x86/kernel/apic/x2apic_cluster.c |   12 ++++++++++++
 arch/x86/kernel/apic/x2apic_phys.c    |   12 ++++++++++++
 arch/x86/kernel/apic/x2apic_uv_x.c    |    1 +
 arch/x86/kernel/smp.c                 |    4 ++--
 12 files changed, 61 insertions(+), 23 deletions(-)

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[patch 00/14] x86/apic: Implement single target IPI callback Thomas Gleixner <tglx@linutronix.de> - 2015-11-05 00:10 +0100
  [patch 06/14] x86/apic: Remove pointless indirections from bigsmp_apic Thomas Gleixner <tglx@linutronix.de> - 2015-11-05 00:10 +0100
    [tip:x86/apic] x86/apic:   Remove pointless indirections from bigsmp_apic tip-bot for Thomas Gleixner <tipbot@zytor.com> - 2015-11-05 15:50 +0100
  [patch 01/14] x86/apic: Add a single-target IPI function to the apic Thomas Gleixner <tglx@linutronix.de> - 2015-11-05 00:10 +0100
    [tip:x86/apic] x86/apic:   Add a single-target IPI function to the apic tip-bot for Linus Torvalds <tipbot@zytor.com> - 2015-11-05 15:50 +0100
  [patch 05/14] x86/apic: Wire up single IPI for apic_physflat Thomas Gleixner <tglx@linutronix.de> - 2015-11-05 00:10 +0100
    [tip:x86/apic] x86/apic: Wire up single IPI for apic_physflat tip-bot for Thomas Gleixner <tipbot@zytor.com> - 2015-11-05 15:50 +0100
  [patch 04/14] x86/apic: Remove pointless indirections from  apic_physflat Thomas Gleixner <tglx@linutronix.de> - 2015-11-05 00:10 +0100
    [tip:x86/apic] x86/apic:   Remove pointless indirections from apic_physflat tip-bot for Thomas Gleixner <tipbot@zytor.com> - 2015-11-05 15:50 +0100
  [patch 08/14] x86/apic: Implement single IPI for x2apic_phys Thomas Gleixner <tglx@linutronix.de> - 2015-11-05 00:10 +0100
    [tip:x86/apic] x86/apic: Implement single IPI for x2apic_phys tip-bot for Thomas Gleixner <tipbot@zytor.com> - 2015-11-05 15:50 +0100
  [patch 02/14] x86/apic: Implement single target IPI function for  x2apic_cluster Thomas Gleixner <tglx@linutronix.de> - 2015-11-05 00:10 +0100
    Re: [patch 02/14] x86/apic: Implement single target IPI function for x2apic_cluster Linus Torvalds <torvalds@linux-foundation.org> - 2015-11-05 08:10 +0100
      Re: [patch 02/14] x86/apic: Implement single target IPI function  for x2apic_cluster Thomas Gleixner <tglx@linutronix.de> - 2015-11-05 09:10 +0100
    Re: [patch 02/14] x86/apic: Implement single target IPI function for  x2apic_cluster Ingo Molnar <mingo@kernel.org> - 2015-11-05 08:10 +0100
    [tip:x86/apic] x86/apic:   Implement single target IPI function for x2apic_cluster tip-bot for Linus Torvalds <tipbot@zytor.com> - 2015-11-05 15:50 +0100
  [patch 10/14] x86/apic: Implement single IPI for apic_noop Thomas Gleixner <tglx@linutronix.de> - 2015-11-05 00:10 +0100
    [tip:x86/apic] x86/apic: Implement single IPI for apic_noop tip-bot for Thomas Gleixner <tipbot@zytor.com> - 2015-11-05 15:50 +0100

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