[PATCH RFC idle] Make arm, sh, and x86 stop using RCU when idle

Hello!

RCU's shiny new diagnostics (thank you, Frederic!) for using RCU when idle
located a few problems in arm, sh, and x86. This patch series contains
alleged fixes for these problems. And they are real problems -- if RCU
believes that the CPU is idle, it is ignoring it. Which means that the
idle CPU can say "rcu_read_lock()" all it like, but there will be no
useful effect.

I was tempted to break these up, but doing so is bad for bisectability.

Thanx, Paul



arch/arm/kernel/process.c | 2 --
arch/arm/mach-at91/cpuidle.c | 3 +++
arch/arm/mach-davinci/cpuidle.c | 3 +++
arch/arm/mach-exynos/common.c | 2 ++
arch/arm/mach-highbank/pm.c | 12 ++++++++++++
arch/arm/mach-imx/mm-imx3.c | 3 +++
arch/arm/mach-imx/pm-imx27.c | 4 ++++
arch/arm/mach-imx/pm-imx6q.c | 4 ++++
arch/arm/mach-kirkwood/cpuidle.c | 3 +++
arch/arm/mach-mx5/mm.c | 3 +++
arch/arm/mach-mx5/pm-imx5.c | 3 +++
arch/arm/mach-mxs/pm.c | 4 ++++
arch/arm/mach-omap1/pm.c | 4 ++++
arch/arm/mach-omap2/pm24xx.c | 2 ++
arch/arm/mach-omap2/pm34xx.c | 2 ++
arch/arm/mach-omap2/pm44xx.c | 3 +++
arch/arm/mach-pnx4008/pm.c | 2 ++
arch/arm/mach-prima2/pm.c | 4 ++++
arch/arm/mach-s5p64x0/common.c | 2 ++
arch/arm/mach-s5pc100/common.c | 2 ++
arch/arm/mach-s5pv210/common.c | 2 ++
arch/arm/mach-shmobile/cpuidle.c | 3 +++
arch/arm/mach-shmobile/pm-sh7372.c | 8 ++++++++
arch/sh/kernel/idle.c | 11 ++++++++
arch/x86/kernel/process.c | 13 ++++++++++++-
arch/x86/kernel/process_32.c | 2 --
arch/x86/kernel/process_64.c | 4 -
drivers/idle/intel_idle.c | 2 ++
28 files changed, 100 insertions(+), 12 deletions(-)

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