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kconfig: include kernel/Kconfig.preempt from init/Kconfig

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Almost all architectures include it.  Add a ARCH_NO_PREEMPT symbol to
disable preempt support for alpha, hexagon, non-coldfire m68k and
user mode Linux.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Christoph Hellwig 2018-07-31 13:39:32 +02:00 committed by Masahiro Yamada
parent 06ec64b84c
commit 87a4c37599
28 changed files with 11 additions and 43 deletions
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3
arch/Kconfig
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@ -881,6 +881,9 @@ config COMPAT_32BIT_TIME
config ARCH_NO_COHERENT_DMA_MMAP
bool
config ARCH_NO_PREEMPT
bool
config CPU_NO_EFFICIENT_FFS
def_bool n

1
arch/alpha/Kconfig
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@ -4,6 +4,7 @@ config ALPHA
default y
select ARCH_MIGHT_HAVE_PC_PARPORT
select ARCH_MIGHT_HAVE_PC_SERIO
select ARCH_NO_PREEMPT
select ARCH_USE_CMPXCHG_LOCKREF
select HAVE_AOUT
select HAVE_IDE

2
arch/arc/Kconfig
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@ -545,8 +545,6 @@ config ARC_BUILTIN_DTB_NAME
Set the name of the DTB to embed in the vmlinux binary
Leaving it blank selects the minimal "skeleton" dtb
source "kernel/Kconfig.preempt"
endmenu # "ARC Architecture Configuration"
config FORCE_MAX_ZONEORDER

2
arch/arm/Kconfig
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@ -1481,8 +1481,6 @@ config ARCH_NR_GPIO
If unsure, leave the default value.
source kernel/Kconfig.preempt
config HZ_FIXED
int
default 200 if ARCH_EBSA110

1
arch/arm64/Kconfig
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@ -752,7 +752,6 @@ config HOLES_IN_ZONE
def_bool y
depends on NUMA
source kernel/Kconfig.preempt
source kernel/Kconfig.hz
config ARCH_SUPPORTS_DEBUG_PAGEALLOC

2
arch/c6x/Kconfig
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@ -110,8 +110,6 @@ config KERNEL_RAM_BASE_ADDRESS
default 0xe0000000 if SOC_TMS320C6472
default 0x80000000
source "kernel/Kconfig.preempt"
source "kernel/Kconfig.hz"
endmenu

6
arch/h8300/Kconfig
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@ -49,9 +49,3 @@ config NR_CPUS
default 1
source "arch/h8300/Kconfig.cpu"
menu "Kernel Features"
source "kernel/Kconfig.preempt"
endmenu

1
arch/hexagon/Kconfig
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@ -4,6 +4,7 @@ comment "Linux Kernel Configuration for Hexagon"
config HEXAGON
def_bool y
select ARCH_NO_PREEMPT
select HAVE_OPROFILE
# Other pending projects/to-do items.
# select HAVE_REGS_AND_STACK_ACCESS_API

2
arch/ia64/Kconfig
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@ -364,8 +364,6 @@ config FORCE_CPEI_RETARGET
This option it useful to enable this feature on older BIOS's as well.
You can also enable this by using boot command line option force_cpei=1.
source "kernel/Kconfig.preempt"
config ARCH_SELECT_MEMORY_MODEL
def_bool y

5
arch/m68k/Kconfig
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@ -4,6 +4,7 @@ config M68K
default y
select ARCH_MIGHT_HAVE_PC_PARPORT if ISA
select ARCH_NO_COHERENT_DMA_MMAP if !MMU
select ARCH_NO_PREEMPT if !COLDFIRE
select HAVE_IDE
select HAVE_AOUT if MMU
select HAVE_DEBUG_BUGVERBOSE
@ -129,10 +130,6 @@ endmenu
menu "Kernel Features"
if COLDFIRE
source "kernel/Kconfig.preempt"
endif
endmenu
if !MMU

2
arch/microblaze/Kconfig
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@ -87,8 +87,6 @@ source "arch/microblaze/Kconfig.platform"
menu "Processor type and features"
source "kernel/Kconfig.preempt"
source "kernel/Kconfig.hz"
config MMU

2
arch/mips/Kconfig
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@ -2818,8 +2818,6 @@ config HZ
config SCHED_HRTICK
def_bool HIGH_RES_TIMERS
source "kernel/Kconfig.preempt"
config KEXEC
bool "Kexec system call"
select KEXEC_CORE

1
arch/nds32/Kconfig
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@ -88,6 +88,5 @@ config NDS32_BUILTIN_DTB
endmenu
menu "Kernel Features"
source "kernel/Kconfig.preempt"
source "kernel/Kconfig.hz"
endmenu

2
arch/nios2/Kconfig
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@ -47,8 +47,6 @@ config TRACE_IRQFLAGS_SUPPORT
menu "Kernel features"
source "kernel/Kconfig.preempt"
source "kernel/Kconfig.hz"
config FORCE_MAX_ZONEORDER

1
arch/openrisc/Kconfig
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@ -143,7 +143,6 @@ config SMP
If you don't know what to do here, say N.
source kernel/Kconfig.hz
source kernel/Kconfig.preempt
config OPENRISC_NO_SPR_SR_DSX
bool "use SPR_SR_DSX software emulation" if OR1K_1200

1
arch/parisc/Kconfig
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@ -323,7 +323,6 @@ config NODES_SHIFT
default "3"
depends on NEED_MULTIPLE_NODES
source "kernel/Kconfig.preempt"
source "kernel/Kconfig.hz"
config COMPAT

1
arch/powerpc/Kconfig
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@ -393,7 +393,6 @@ config HIGHMEM
depends on PPC32
source kernel/Kconfig.hz
source kernel/Kconfig.preempt
config HUGETLB_PAGE_SIZE_VARIABLE
bool

2
arch/riscv/Kconfig
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@ -212,8 +212,6 @@ endmenu
menu "Kernel type"
source "kernel/Kconfig.preempt"
source "kernel/Kconfig.hz"
endmenu

2
arch/s390/Kconfig
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@ -511,8 +511,6 @@ config SCHED_TOPOLOGY
making when dealing with machines that have multi-threading,
multiple cores or multiple books.
source kernel/Kconfig.preempt
source kernel/Kconfig.hz
config KEXEC

2
arch/sh/Kconfig
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@ -709,8 +709,6 @@ config HOTPLUG_CPU
Say Y here to experiment with turning CPUs off and on. CPUs
can be controlled through /sys/devices/system/cpu.
source "kernel/Kconfig.preempt"
config GUSA
def_bool y
depends on !SMP && SUPERH32

2
arch/sparc/Kconfig
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@ -349,8 +349,6 @@ config SCHED_MC
making when dealing with multi-core CPU chips at a cost of slightly
increased overhead in some places. If unsure say N here.
source "kernel/Kconfig.preempt"
config CMDLINE_BOOL
bool "Default bootloader kernel arguments"
depends on SPARC64

1
arch/um/Kconfig
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@ -6,6 +6,7 @@ config UML
bool
default y
select ARCH_HAS_KCOV
select ARCH_NO_PREEMPT
select HAVE_ARCH_AUDITSYSCALL
select HAVE_ARCH_SECCOMP_FILTER
select HAVE_UID16

2
arch/unicore32/Kconfig
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@ -135,8 +135,6 @@ endmenu
menu "Kernel Features"
source "kernel/Kconfig.preempt"
source "kernel/Kconfig.hz"
config LEDS

2
arch/x86/Kconfig
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@ -1039,8 +1039,6 @@ config SCHED_MC_PRIO
If unsure say Y here.
source "kernel/Kconfig.preempt"
config UP_LATE_INIT
def_bool y
depends on !SMP && X86_LOCAL_APIC

2
arch/xtensa/Kconfig
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@ -173,8 +173,6 @@ config XTENSA_UNALIGNED_USER
Say Y here to enable unaligned memory access in user space.
source "kernel/Kconfig.preempt"
config HAVE_SMP
bool "System Supports SMP (MX)"
depends on XTENSA_VARIANT_CUSTOM

1
init/Kconfig
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@ -326,6 +326,7 @@ config AUDIT_TREE
source "kernel/irq/Kconfig"
source "kernel/time/Kconfig"
source "kernel/Kconfig.preempt"
menu "CPU/Task time and stats accounting"

2
kernel/Kconfig.preempt
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@ -18,6 +18,7 @@ config PREEMPT_NONE
config PREEMPT_VOLUNTARY
bool "Voluntary Kernel Preemption (Desktop)"
depends on !ARCH_NO_PREEMPT
help
This option reduces the latency of the kernel by adding more
"explicit preemption points" to the kernel code. These new
@ -35,6 +36,7 @@ config PREEMPT_VOLUNTARY
config PREEMPT
bool "Preemptible Kernel (Low-Latency Desktop)"
depends on !ARCH_NO_PREEMPT
select PREEMPT_COUNT
select UNINLINE_SPIN_UNLOCK if !ARCH_INLINE_SPIN_UNLOCK
help

1
lib/Kconfig.debug
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@ -1195,6 +1195,7 @@ config DEBUG_ATOMIC_SLEEP
bool "Sleep inside atomic section checking"
select PREEMPT_COUNT
depends on DEBUG_KERNEL
depends on !ARCH_NO_PREEMPT
help
If you say Y here, various routines which may sleep will become very
noisy if they are called inside atomic sections: when a spinlock is