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[ARM] dyntick: Remove obsolete and unused ARM dyntick support
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dyntick is superseded by the clocksource/clockevent infrastructure,
using the NO_HZ configuration option.  No one implements dyntick on
ARM anymore, so it's pointless keeping it around.  Remove dyntick
support.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Russell King authored and Russell King committed May 12, 2008
1 parent 492c2e4 commit 205bee6
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Showing 46 changed files with 1 addition and 235 deletions.
21 changes: 0 additions & 21 deletions arch/arm/Kconfig
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Expand Up @@ -703,27 +703,6 @@ config PREEMPT
Say Y here if you are building a kernel for a desktop, embedded
or real-time system. Say N if you are unsure.

config NO_IDLE_HZ
bool "Dynamic tick timer"
depends on !GENERIC_CLOCKEVENTS
help
Select this option if you want to disable continuous timer ticks
and have them programmed to occur as required. This option saves
power as the system can remain in idle state for longer.

By default dynamic tick is disabled during the boot, and can be
manually enabled with:

echo 1 > /sys/devices/system/timer/timer0/dyn_tick

Alternatively, if you want dynamic tick automatically enabled
during boot, pass "dyntick=enable" via the kernel command string.

Please note that dynamic tick may affect the accuracy of
timekeeping on some platforms depending on the implementation.
Currently at least OMAP, PXA2xx and SA11x0 platforms are known
to have accurate timekeeping with dynamic tick.

config HZ
int
default 128 if ARCH_L7200
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1 change: 0 additions & 1 deletion arch/arm/configs/at91cap9adk_defconfig
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Expand Up @@ -213,7 +213,6 @@ CONFIG_CPU_CP15_MMU=y
#
# CONFIG_TICK_ONESHOT is not set
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
CONFIG_AEABI=y
CONFIG_OABI_COMPAT=y
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1 change: 0 additions & 1 deletion arch/arm/configs/at91rm9200dk_defconfig
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Expand Up @@ -169,7 +169,6 @@ CONFIG_AT91_CF=y
# Kernel Features
#
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
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1 change: 0 additions & 1 deletion arch/arm/configs/at91rm9200ek_defconfig
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Expand Up @@ -160,7 +160,6 @@ CONFIG_ISA_DMA_API=y
# Kernel Features
#
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
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1 change: 0 additions & 1 deletion arch/arm/configs/at91sam9260ek_defconfig
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Expand Up @@ -220,7 +220,6 @@ CONFIG_CPU_CP15_MMU=y
#
# CONFIG_TICK_ONESHOT is not set
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/at91sam9261ek_defconfig
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Expand Up @@ -213,7 +213,6 @@ CONFIG_CPU_CP15_MMU=y
#
# CONFIG_TICK_ONESHOT is not set
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/at91sam9263ek_defconfig
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Expand Up @@ -213,7 +213,6 @@ CONFIG_CPU_CP15_MMU=y
#
# CONFIG_TICK_ONESHOT is not set
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/at91sam9rlek_defconfig
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Expand Up @@ -211,7 +211,6 @@ CONFIG_CPU_CP15_MMU=y
#
# CONFIG_TICK_ONESHOT is not set
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/ateb9200_defconfig
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Expand Up @@ -171,7 +171,6 @@ CONFIG_AT91_CF=m
# Kernel Features
#
CONFIG_PREEMPT=y
CONFIG_NO_IDLE_HZ=y
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/cm_x270_defconfig
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Expand Up @@ -194,7 +194,6 @@ CONFIG_PCI_HOST_ITE8152=y
#
# CONFIG_TICK_ONESHOT is not set
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/collie_defconfig
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Expand Up @@ -166,7 +166,6 @@ CONFIG_PCMCIA_SA1100=y
# Kernel Features
#
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
CONFIG_ARCH_DISCONTIGMEM_ENABLE=y
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1 change: 0 additions & 1 deletion arch/arm/configs/corgi_defconfig
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Expand Up @@ -165,7 +165,6 @@ CONFIG_PCMCIA_PXA2XX=y
# Kernel Features
#
CONFIG_PREEMPT=y
# CONFIG_NO_IDLE_HZ is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
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1 change: 0 additions & 1 deletion arch/arm/configs/ecbat91_defconfig
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Expand Up @@ -230,7 +230,6 @@ CONFIG_AT91_CF=y
#
# CONFIG_TICK_ONESHOT is not set
CONFIG_PREEMPT=y
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/em_x270_defconfig
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Expand Up @@ -197,7 +197,6 @@ CONFIG_XSCALE_PMU=y
#
# CONFIG_TICK_ONESHOT is not set
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
CONFIG_AEABI=y
CONFIG_OABI_COMPAT=y
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1 change: 0 additions & 1 deletion arch/arm/configs/ep93xx_defconfig
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Expand Up @@ -184,7 +184,6 @@ CONFIG_ARM_AMBA=y
# Kernel Features
#
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/eseries_pxa_defconfig
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Expand Up @@ -251,7 +251,6 @@ CONFIG_PCMCIA_PXA2XX=m
# Kernel Features
#
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
CONFIG_AEABI=y
CONFIG_OABI_COMPAT=y
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1 change: 0 additions & 1 deletion arch/arm/configs/iop13xx_defconfig
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Expand Up @@ -197,7 +197,6 @@ CONFIG_PCI_LEGACY=y
#
# CONFIG_TICK_ONESHOT is not set
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/iop32x_defconfig
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Expand Up @@ -201,7 +201,6 @@ CONFIG_PCI_LEGACY=y
#
# CONFIG_TICK_ONESHOT is not set
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/iop33x_defconfig
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Expand Up @@ -197,7 +197,6 @@ CONFIG_PCI_LEGACY=y
#
# CONFIG_TICK_ONESHOT is not set
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/ixp2000_defconfig
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Expand Up @@ -184,7 +184,6 @@ CONFIG_PCI=y
# Kernel Features
#
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/ixp23xx_defconfig
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Expand Up @@ -180,7 +180,6 @@ CONFIG_PCI=y
# Kernel Features
#
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/kafa_defconfig
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Expand Up @@ -162,7 +162,6 @@ CONFIG_CPU_TLB_V4WBI=y
# Kernel Features
#
CONFIG_PREEMPT=y
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/kb9202_defconfig
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Expand Up @@ -126,7 +126,6 @@ CONFIG_ISA_DMA_API=y
#
# Kernel Features
#
# CONFIG_NO_IDLE_HZ is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
CONFIG_FLATMEM=y
CONFIG_FLAT_NODE_MEM_MAP=y
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1 change: 0 additions & 1 deletion arch/arm/configs/ks8695_defconfig
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Expand Up @@ -174,7 +174,6 @@ CONFIG_PCCARD_NONSTATIC=y
# Kernel Features
#
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/lpd270_defconfig
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Expand Up @@ -173,7 +173,6 @@ CONFIG_XSCALE_PMU=y
# Kernel Features
#
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/lpd7a404_defconfig
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Expand Up @@ -148,7 +148,6 @@ CONFIG_ARM_AMBA=y
# Kernel Features
#
CONFIG_PREEMPT=y
# CONFIG_NO_IDLE_HZ is not set
# CONFIG_AEABI is not set
CONFIG_ARCH_DISCONTIGMEM_ENABLE=y
CONFIG_SELECT_MEMORY_MODEL=y
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1 change: 0 additions & 1 deletion arch/arm/configs/netx_defconfig
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Expand Up @@ -154,7 +154,6 @@ CONFIG_ARM_AMBA=y
# Kernel Features
#
CONFIG_PREEMPT=y
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/onearm_defconfig
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Expand Up @@ -202,7 +202,6 @@ CONFIG_AT91_CF=y
# Kernel Features
#
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/picotux200_defconfig
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Expand Up @@ -201,7 +201,6 @@ CONFIG_ARM_THUMB=y
# Kernel Features
#
# CONFIG_PREEMPT is not set
CONFIG_NO_IDLE_HZ=y
CONFIG_HZ=100
CONFIG_AEABI=y
CONFIG_OABI_COMPAT=y
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1 change: 0 additions & 1 deletion arch/arm/configs/pnx4008_defconfig
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Expand Up @@ -151,7 +151,6 @@ CONFIG_ARM_THUMB=y
# Kernel Features
#
CONFIG_PREEMPT=y
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/realview-smp_defconfig
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Expand Up @@ -177,7 +177,6 @@ CONFIG_NR_CPUS=4
CONFIG_HOTPLUG_CPU=y
CONFIG_LOCAL_TIMERS=y
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/realview_defconfig
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Expand Up @@ -126,7 +126,6 @@ CONFIG_ISA_DMA_API=y
#
# Kernel Features
#
# CONFIG_NO_IDLE_HZ is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
CONFIG_FLATMEM=y
CONFIG_FLAT_NODE_MEM_MAP=y
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1 change: 0 additions & 1 deletion arch/arm/configs/rpc_defconfig
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Expand Up @@ -190,7 +190,6 @@ CONFIG_ISA_DMA_API=y
#
# CONFIG_TICK_ONESHOT is not set
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/s3c2410_defconfig
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Expand Up @@ -246,7 +246,6 @@ CONFIG_ISA=y
# Kernel Features
#
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=200
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/sam9_l9260_defconfig
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Expand Up @@ -211,7 +211,6 @@ CONFIG_ARM_THUMB=y
#
# CONFIG_TICK_ONESHOT is not set
CONFIG_PREEMPT=y
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/spitz_defconfig
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Expand Up @@ -164,7 +164,6 @@ CONFIG_PCMCIA_PXA2XX=y
# Kernel Features
#
CONFIG_PREEMPT=y
# CONFIG_NO_IDLE_HZ is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
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1 change: 0 additions & 1 deletion arch/arm/configs/tct_hammer_defconfig
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Expand Up @@ -247,7 +247,6 @@ CONFIG_ARM_THUMB=y
#
# CONFIG_TICK_ONESHOT is not set
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=200
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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1 change: 0 additions & 1 deletion arch/arm/configs/trizeps4_defconfig
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Expand Up @@ -195,7 +195,6 @@ CONFIG_PCMCIA_PXA2XX=y
# Kernel Features
#
CONFIG_PREEMPT=y
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
CONFIG_AEABI=y
CONFIG_OABI_COMPAT=y
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1 change: 0 additions & 1 deletion arch/arm/configs/versatile_defconfig
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Expand Up @@ -151,7 +151,6 @@ CONFIG_ARM_AMBA=y
# Kernel Features
#
# CONFIG_PREEMPT is not set
# CONFIG_NO_IDLE_HZ is not set
CONFIG_HZ=100
# CONFIG_AEABI is not set
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
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4 changes: 1 addition & 3 deletions arch/arm/kernel/process.c
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Expand Up @@ -133,10 +133,8 @@ static void default_idle(void)
cpu_relax();
else {
local_irq_disable();
if (!need_resched()) {
timer_dyn_reprogram();
if (!need_resched())
arch_idle();
}
local_irq_enable();
}
}
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