[PATCH 00/36] cpuidle,rcu: Cleanup the mess

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Hi All! (omg so many)

These here few patches mostly clear out the utter mess that is cpuidle vs rcuidle.

At the end of the ride there's only 2 real RCU_NONIDLE() users left

  arch/arm64/kernel/suspend.c:            RCU_NONIDLE(__cpu_suspend_exit());
  drivers/perf/arm_pmu.c:                 RCU_NONIDLE(armpmu_start(event, PERF_EF_RELOAD));
  kernel/cfi.c:   RCU_NONIDLE({

(the CFI one is likely dead in the kCFI rewrite) and there's only a hand full
of trace_.*_rcuidle() left:

  kernel/trace/trace_preemptirq.c:                        trace_irq_enable_rcuidle(CALLER_ADDR0, CALLER_ADDR1);
  kernel/trace/trace_preemptirq.c:                        trace_irq_disable_rcuidle(CALLER_ADDR0, CALLER_ADDR1);
  kernel/trace/trace_preemptirq.c:                        trace_irq_enable_rcuidle(CALLER_ADDR0, caller_addr);
  kernel/trace/trace_preemptirq.c:                        trace_irq_disable_rcuidle(CALLER_ADDR0, caller_addr);
  kernel/trace/trace_preemptirq.c:                trace_preempt_enable_rcuidle(a0, a1);
  kernel/trace/trace_preemptirq.c:                trace_preempt_disable_rcuidle(a0, a1);

All of them are in 'deprecated' code that is unused for GENERIC_ENTRY.

I've touched a _lot_ of code that I can't test and likely broken some of it :/
In particular, the whole ARM cpuidle stuff was quite involved with OMAP being
the absolute 'winner'.

I'm hoping Mark can help me sort the remaining ARM64 bits as he moves that to
GENERIC_ENTRY. I've also got a note that says ARM64 can probably do a WFE based
idle state and employ TIF_POLLING_NRFLAG to avoid some IPIs.

---
 arch/alpha/kernel/process.c          |    1 
 arch/alpha/kernel/vmlinux.lds.S      |    1 
 arch/arc/kernel/process.c            |    3 +
 arch/arc/kernel/vmlinux.lds.S        |    1 
 arch/arm/include/asm/vmlinux.lds.h   |    1 
 arch/arm/kernel/process.c            |    1 
 arch/arm/kernel/smp.c                |    6 +--
 arch/arm/mach-gemini/board-dt.c      |    3 +
 arch/arm/mach-imx/cpuidle-imx6q.c    |    4 +-
 arch/arm/mach-imx/cpuidle-imx6sx.c   |    5 ++
 arch/arm/mach-omap2/cpuidle34xx.c    |   16 ++++++++
 arch/arm/mach-omap2/cpuidle44xx.c    |   29 +++++++++------
 arch/arm/mach-omap2/pm.h             |    2 -
 arch/arm/mach-omap2/pm34xx.c         |   14 +++++--
 arch/arm/mach-omap2/powerdomain.c    |   10 ++---
 arch/arm64/kernel/idle.c             |    1 
 arch/arm64/kernel/smp.c              |    4 +-
 arch/arm64/kernel/vmlinux.lds.S      |    1 
 arch/csky/kernel/process.c           |    1 
 arch/csky/kernel/smp.c               |    2 -
 arch/csky/kernel/vmlinux.lds.S       |    1 
 arch/hexagon/kernel/process.c        |    1 
 arch/hexagon/kernel/vmlinux.lds.S    |    1 
 arch/ia64/kernel/process.c           |    1 
 arch/ia64/kernel/vmlinux.lds.S       |    1 
 arch/loongarch/kernel/vmlinux.lds.S  |    1 
 arch/m68k/kernel/vmlinux-nommu.lds   |    1 
 arch/m68k/kernel/vmlinux-std.lds     |    1 
 arch/m68k/kernel/vmlinux-sun3.lds    |    1 
 arch/microblaze/kernel/process.c     |    1 
 arch/microblaze/kernel/vmlinux.lds.S |    1 
 arch/mips/kernel/idle.c              |    8 +---
 arch/mips/kernel/vmlinux.lds.S       |    1 
 arch/nios2/kernel/process.c          |    1 
 arch/nios2/kernel/vmlinux.lds.S      |    1 
 arch/openrisc/kernel/process.c       |    1 
 arch/openrisc/kernel/vmlinux.lds.S   |    1 
 arch/parisc/kernel/process.c         |    2 -
 arch/parisc/kernel/vmlinux.lds.S     |    1 
 arch/powerpc/kernel/idle.c           |    5 +-
 arch/powerpc/kernel/vmlinux.lds.S    |    1 
 arch/riscv/kernel/process.c          |    1 
 arch/riscv/kernel/vmlinux-xip.lds.S  |    1 
 arch/riscv/kernel/vmlinux.lds.S      |    1 
 arch/s390/kernel/idle.c              |    1 
 arch/s390/kernel/vmlinux.lds.S       |    1 
 arch/sh/kernel/idle.c                |    1 
 arch/sh/kernel/vmlinux.lds.S         |    1 
 arch/sparc/kernel/leon_pmc.c         |    4 ++
 arch/sparc/kernel/process_32.c       |    1 
 arch/sparc/kernel/process_64.c       |    3 +
 arch/sparc/kernel/vmlinux.lds.S      |    1 
 arch/um/kernel/dyn.lds.S             |    1 
 arch/um/kernel/process.c             |    1 
 arch/um/kernel/uml.lds.S             |    1 
 arch/x86/coco/tdx/tdcall.S           |   15 +-------
 arch/x86/coco/tdx/tdx.c              |   25 +++----------
 arch/x86/events/amd/brs.c            |   13 ++-----
 arch/x86/include/asm/irqflags.h      |   11 ++---
 arch/x86/include/asm/mwait.h         |   14 +++----
 arch/x86/include/asm/nospec-branch.h |    2 -
 arch/x86/include/asm/paravirt.h      |    6 ++-
 arch/x86/include/asm/perf_event.h    |    2 -
 arch/x86/include/asm/shared/io.h     |    4 +-
 arch/x86/include/asm/shared/tdx.h    |    1 
 arch/x86/include/asm/special_insns.h |    6 +--
 arch/x86/include/asm/xen/hypercall.h |    2 -
 arch/x86/kernel/paravirt.c           |   14 ++++++-
 arch/x86/kernel/process.c            |   65 +++++++++++++++++------------------
 arch/x86/kernel/vmlinux.lds.S        |    1 
 arch/x86/xen/enlighten_pv.c          |    2 -
 arch/x86/xen/irq.c                   |    2 -
 arch/xtensa/kernel/process.c         |    1 
 arch/xtensa/kernel/vmlinux.lds.S     |    1 
 drivers/acpi/processor_idle.c        |   46 ++++++++++++++----------
 drivers/base/power/runtime.c         |   24 ++++++------
 drivers/clk/clk.c                    |    8 ++--
 drivers/cpuidle/cpuidle-arm.c        |    1 
 drivers/cpuidle/cpuidle-big_little.c |    8 +++-
 drivers/cpuidle/cpuidle-mvebu-v7.c   |    7 +++
 drivers/cpuidle/cpuidle-psci.c       |   10 +++--
 drivers/cpuidle/cpuidle-qcom-spm.c   |    1 
 drivers/cpuidle/cpuidle-riscv-sbi.c  |   10 +++--
 drivers/cpuidle/cpuidle-tegra.c      |   21 ++++++++---
 drivers/cpuidle/cpuidle.c            |   21 +++++------
 drivers/cpuidle/dt_idle_states.c     |    2 -
 drivers/cpuidle/poll_state.c         |   10 ++++-
 drivers/idle/intel_idle.c            |   29 ++++++++++++---
 include/asm-generic/vmlinux.lds.h    |    9 +---
 include/linux/compiler_types.h       |    8 +++-
 include/linux/cpu.h                  |    3 -
 include/linux/cpuidle.h              |   33 +++++++++++++++++
 include/linux/cpumask.h              |    4 +-
 include/linux/sched/idle.h           |   40 ++++++++++++++++-----
 include/linux/thread_info.h          |   18 +++++++++
 include/linux/tracepoint.h           |   13 ++++++-
 kernel/cpu_pm.c                      |    9 ----
 kernel/printk/printk.c               |    2 -
 kernel/rcu/tree.c                    |    9 +---
 kernel/sched/idle.c                  |   47 +++++++------------------
 kernel/time/tick-broadcast-hrtimer.c |   29 ++++++---------
 kernel/time/tick-broadcast.c         |    6 ++-
 kernel/trace/trace.c                 |    3 +
 tools/objtool/check.c                |   15 +++++++-
 104 files changed, 449 insertions(+), 342 deletions(-)




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