[RFC PATCH 00/20] Use msi_chip to configure MSI/MSI-X in all platforms

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This series is mainly to use msi_chip instead of currently weak arch functions
across all platforms. Also clean up current MSI code and make drivers support
MSI easier.  

Yijing Wang (20):
  x86/xen/MSI: Eliminate arch_msix_mask_irq() and arch_msi_mask_irq()
  MSI: Clean up struct msi_chip argument
  PCI/MSI: Remove useless bus->msi assignment
  MSI: Remove the redundant irq_set_chip_data()
  MSI: Refactor struct msi_chip to become more common
  PCI/MSI: Introduce arch_get_match_msi_chip() to find the match
    msi_chip
  x86/MSI: Use msi_chip instead of arch func to configure MSI/MSI-X
  x86/xen/MSI: Use msi_chip instead of arch func to configure MSI/MSI-X
  irq_remapping/MSI: Use msi_chip instead of arch func to configure
    MSI/MSI-X
  x86/MSI: Remove unused MSI weak arch functions
  MIPS/Octeon/MSI: Use msi_chip instead of arch func to configure
    MSI/MSI-X
  MIPS/Xlp/MSI: Use msi_chip instead of arch func to configure
    MSI/MSI-X
  MIPS/xlr/MSI: Use msi_chip instead of arch func to configure
    MSI/MSI-X
  Powerpc/MSI: Use msi_chip instead of arch func to configure MSI/MSI-X
  s390/MSI: Use msi_chip instead of arch func to configure MSI/MSI-X
  arm/iop13xx/MSI: Use msi_chip instead of arch func to configure
    MSI/MSI-X
  IA64/MSI: Use msi_chip instead of arch func to configure MSI/MSI-X
  Sparc/MSI: Use msi_chip instead of arch func to configure MSI/MSI-X
  tile/MSI: Use msi_chip instead of arch func to configure MSI/MSI-X
  PCI/MSI: Clean up unused MSI arch functions

 arch/arm/mach-iop13xx/include/mach/pci.h |    2 +
 arch/arm/mach-iop13xx/iq81340mc.c        |    1 +
 arch/arm/mach-iop13xx/iq81340sc.c        |    1 +
 arch/arm/mach-iop13xx/msi.c              |   14 +++-
 arch/arm/mach-iop13xx/pci.c              |    6 ++
 arch/ia64/kernel/msi_ia64.c              |   18 +++-
 arch/mips/pci/msi-octeon.c               |   45 ++++------
 arch/mips/pci/msi-xlp.c                  |   15 +++-
 arch/mips/pci/pci-xlr.c                  |   19 +++-
 arch/powerpc/kernel/msi.c                |   23 ++++--
 arch/s390/pci/pci.c                      |   16 +++-
 arch/sparc/kernel/pci.c                  |   18 +++-
 arch/tile/kernel/pci_gx.c                |   20 +++-
 arch/x86/include/asm/pci.h               |    4 +-
 arch/x86/include/asm/x86_init.h          |    3 -
 arch/x86/kernel/apic/io_apic.c           |   35 +++++++-
 arch/x86/kernel/x86_init.c               |   34 -------
 arch/x86/pci/xen.c                       |  139 ++++++++++++++++--------------
 drivers/iommu/irq_remapping.c            |   13 ++-
 drivers/irqchip/irq-armada-370-xp.c      |   12 +--
 drivers/pci/host/pci-tegra.c             |    9 ++-
 drivers/pci/host/pcie-designware.c       |    6 +-
 drivers/pci/host/pcie-rcar.c             |    9 ++-
 drivers/pci/msi.c                        |  118 ++++++++++++--------------
 drivers/pci/probe.c                      |    1 -
 include/linux/msi.h                      |   13 ++--
 26 files changed, 338 insertions(+), 256 deletions(-)



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