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Subject[RFC PATCH v1 0/9] Support shared percpu interrupts; clean up MIPS hacks
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This series introduces support for percpu shared interrupts and makes
use of this support to clean up some hacks that have been used to
support such interrupts on MIPS.

- Patch 1 allows users of shared interrupts to opt into IRQ_NOAUTOEN
behaviour & avoid warnings from doing so.

- Patch 2 introduces support for shared percpu_devid interrupts.

- Patch 3 introduces a helper allowing users to detect whether an
interrupt is a percpu_devid interrupt or not, which is useful
during the transition phase where interrupts may be either.

- Patches 4 & 5 removes an ugly custom implementation of shared
interrupts between the MIPS cevt-r4k timer driver & users of
performance counters, in favor of using standard IRQF_SHARED &
multiple handlers.

- Patches 6 & 7 add percpu interrupt support to the MIPS perf &
cevt-r4k timer drivers respectively.

- Patch 8 configures the MIPS cop 0 count/compare, fast debug channel &
performance counter overflow interrupts as percpu_devid when they are
mapped by the irqchip-mips-cpu driver.

- Patch 9 removes a hack from the irqchip-mips-gic driver that was
used to enable & disable an interrupt across all CPUs, which is no
longer necessary with users of those interrupts using the percpu
interrupt APIs correctly. This mirrors patch 8 for systems where we
map the CPU local interrupts via the GIC.

There's a little more work necessary before this could go in - the
MIPS oprofile code needs adjusting to use the percpu interrupt APIs, as
does the fast debug channel driver.

Applies atop next-20170905.

Paul Burton (9):
genirq: Allow shared interrupt users to opt into IRQ_NOAUTOEN
genirq: Support shared per_cpu_devid interrupts
genirq: Introduce irq_is_percpu_devid()
MIPS: Remove perf_irq interrupt sharing fallback
MIPS: Remove perf_irq
MIPS: perf: percpu_devid interrupt support
MIPS: cevt-r4k: percpu_devid interrupt support
irqchip: mips-cpu: Set timer, FDC & perf interrupts percpu_devid
irqchip: mips-gic: Remove gic_all_vpes_local_irq_controller

arch/mips/include/asm/time.h | 1 -
arch/mips/kernel/cevt-r4k.c | 77 ++++++++++++-----------------
arch/mips/kernel/perf_event_mipsxx.c | 71 +++++++++++----------------
arch/mips/kernel/time.c | 9 ----
arch/mips/kernel/traps.c | 2 +-
arch/mips/oprofile/op_impl.h | 2 -
arch/mips/oprofile/op_model_loongson3.c | 39 +++++++--------
arch/mips/oprofile/op_model_mipsxx.c | 10 +---
drivers/irqchip/irq-mips-cpu.c | 9 +++-
drivers/irqchip/irq-mips-gic.c | 69 +++-----------------------
include/linux/interrupt.h | 2 +
include/linux/irqdesc.h | 8 +++
kernel/irq/chip.c | 8 +--
kernel/irq/handle.c | 8 ++-
kernel/irq/manage.c | 86 +++++++++++++++++++++++++--------
kernel/irq/settings.h | 5 ++
16 files changed, 189 insertions(+), 217 deletions(-)

--
2.14.1

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