Commit 205bee6a authored by Russell King's avatar Russell King Committed by Russell King
Browse files

[ARM] dyntick: Remove obsolete and unused ARM dyntick support 



dyntick is superseded by the clocksource/clockevent infrastructure,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: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 492c2e47

arch/arm/Kconfig

+0 −21
Original line number Diff line number Diff line
@@ -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

arch/arm/configs/at91cap9adk_defconfig

+0 −1
Original line number Diff line number Diff line
@@ -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

arch/arm/configs/at91rm9200dk_defconfig

+0 −1
Original line number Diff line number Diff line
@@ -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

arch/arm/configs/at91rm9200ek_defconfig

+0 −1
Original line number Diff line number Diff line
@@ -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

arch/arm/configs/at91sam9260ek_defconfig

+0 −1
Original line number Diff line number Diff line
@@ -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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