idle: Remove GENERIC_IDLE_LOOP config switch

All archs are converted over. Remove the config switch and the
fallback code.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

arch/Kconfig

@@ -216,9 +216,6 @@ config USE_GENERIC_SMP_HELPERS
 config GENERIC_SMP_IDLE_THREAD
        bool
 
-config GENERIC_IDLE_LOOP
-       bool
-
 # Select if arch init_task initializer is different to init/init_task.c
 config ARCH_INIT_TASK
        bool

arch/alpha/Kconfig

@@ -17,7 +17,6 @@ config ALPHA
 	select ARCH_WANT_IPC_PARSE_VERSION
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select GENERIC_SMP_IDLE_THREAD
-	select GENERIC_IDLE_LOOP
 	select GENERIC_CMOS_UPDATE
 	select GENERIC_STRNCPY_FROM_USER
 	select GENERIC_STRNLEN_USER

arch/arc/Kconfig

@@ -14,7 +14,6 @@ config ARC
 	select GENERIC_ATOMIC64
 	select GENERIC_CLOCKEVENTS
 	select GENERIC_FIND_FIRST_BIT
-	select GENERIC_IDLE_LOOP
 	# for now, we don't need GENERIC_IRQ_PROBE, CONFIG_GENERIC_IRQ_CHIP
 	select GENERIC_IRQ_SHOW
 	select GENERIC_KERNEL_EXECVE

arch/arm/Kconfig

@@ -15,7 +15,6 @@ config ARM
 	select GENERIC_IRQ_SHOW
 	select GENERIC_PCI_IOMAP
 	select GENERIC_SMP_IDLE_THREAD
-	select GENERIC_IDLE_LOOP
 	select GENERIC_IDLE_POLL_SETUP
 	select GENERIC_STRNCPY_FROM_USER
 	select GENERIC_STRNLEN_USER

arch/arm64/Kconfig

@@ -9,7 +9,6 @@ config ARM64
 	select CLONE_BACKWARDS
 	select COMMON_CLK
 	select GENERIC_CLOCKEVENTS
-	select GENERIC_IDLE_LOOP
 	select GENERIC_IOMAP
 	select GENERIC_IRQ_PROBE
 	select GENERIC_IRQ_SHOW

arch/avr32/Kconfig

@@ -10,7 +10,6 @@ config AVR32
 	select VIRT_TO_BUS
 	select GENERIC_IRQ_PROBE
 	select GENERIC_ATOMIC64
-	select GENERIC_IDLE_LOOP
 	select HARDIRQS_SW_RESEND
 	select GENERIC_IRQ_SHOW
 	select ARCH_HAVE_CUSTOM_GPIO_H

arch/blackfin/Kconfig

@@ -41,7 +41,6 @@ config BLACKFIN
 	select USE_GENERIC_SMP_HELPERS if SMP
 	select HAVE_NMI_WATCHDOG if NMI_WATCHDOG
 	select GENERIC_SMP_IDLE_THREAD
-	select GENERIC_IDLE_LOOP
 	select ARCH_USES_GETTIMEOFFSET if !GENERIC_CLOCKEVENTS
 	select HAVE_MOD_ARCH_SPECIFIC
 	select MODULES_USE_ELF_RELA

arch/c6x/Kconfig

@@ -18,7 +18,6 @@ config C6X
 	select OF_EARLY_FLATTREE
 	select GENERIC_CLOCKEVENTS
 	select MODULES_USE_ELF_RELA
-	select GENERIC_IDLE_LOOP
 
 config MMU
 	def_bool n

arch/cris/Kconfig

@@ -48,7 +48,6 @@ config CRIS
 	select GENERIC_IRQ_SHOW
 	select GENERIC_IOMAP
 	select GENERIC_SMP_IDLE_THREAD if ETRAX_ARCH_V32
-	select GENERIC_IDLE_LOOP
 	select GENERIC_CMOS_UPDATE
 	select MODULES_USE_ELF_RELA
 	select CLONE_BACKWARDS2

arch/frv/Kconfig

@@ -8,7 +8,6 @@ config FRV
 	select HAVE_GENERIC_HARDIRQS
 	select VIRT_TO_BUS
 	select GENERIC_IRQ_SHOW
-	select GENERIC_IDLE_LOOP
 	select HAVE_DEBUG_BUGVERBOSE
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select GENERIC_CPU_DEVICES

arch/h8300/Kconfig

@@ -8,7 +8,6 @@ config H8300
 	select VIRT_TO_BUS
 	select ARCH_WANT_IPC_PARSE_VERSION
 	select GENERIC_IRQ_SHOW
-	select GENERIC_IDLE_LOOP
 	select GENERIC_CPU_DEVICES
 	select MODULES_USE_ELF_RELA
 	select OLD_SIGSUSPEND3

arch/hexagon/Kconfig

@@ -24,7 +24,6 @@ config HEXAGON
 	select NO_IOPORT
 	select GENERIC_IOMAP
 	select GENERIC_SMP_IDLE_THREAD
-	select GENERIC_IDLE_LOOP
 	select STACKTRACE_SUPPORT
 	select KTIME_SCALAR
 	select GENERIC_CLOCKEVENTS

arch/ia64/Kconfig

@@ -35,7 +35,6 @@ config IA64
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select GENERIC_IOMAP
 	select GENERIC_SMP_IDLE_THREAD
-	select GENERIC_IDLE_LOOP
 	select ARCH_INIT_TASK
 	select ARCH_TASK_STRUCT_ALLOCATOR
 	select ARCH_THREAD_INFO_ALLOCATOR

arch/m32r/Kconfig

@@ -13,7 +13,6 @@ config M32R
 	select VIRT_TO_BUS
 	select GENERIC_IRQ_PROBE
 	select GENERIC_IRQ_SHOW
-	select GENERIC_IDLE_LOOP
 	select GENERIC_ATOMIC64
 	select ARCH_USES_GETTIMEOFFSET
 	select MODULES_USE_ELF_RELA

arch/m68k/Kconfig

@@ -6,7 +6,6 @@ config M68K
 	select HAVE_DEBUG_BUGVERBOSE
 	select HAVE_GENERIC_HARDIRQS
 	select GENERIC_IRQ_SHOW
-	select GENERIC_IDLE_LOOP
 	select GENERIC_ATOMIC64
 	select HAVE_UID16
 	select VIRT_TO_BUS

arch/metag/Kconfig

@@ -7,7 +7,6 @@ config METAG
 	select EMBEDDED
 	select GENERIC_ATOMIC64
 	select GENERIC_CLOCKEVENTS
-	select GENERIC_IDLE_LOOP
 	select GENERIC_IRQ_SHOW
 	select GENERIC_SMP_IDLE_THREAD
 	select HAVE_64BIT_ALIGNED_ACCESS

arch/microblaze/Kconfig

@@ -26,7 +26,6 @@ config MICROBLAZE
 	select GENERIC_CPU_DEVICES
 	select GENERIC_ATOMIC64
 	select GENERIC_CLOCKEVENTS
-	select GENERIC_IDLE_LOOP
 	select GENERIC_IDLE_POLL_SETUP
 	select MODULES_USE_ELF_RELA
 	select CLONE_BACKWARDS

arch/mips/Kconfig

@@ -34,7 +34,6 @@ config MIPS
 	select HAVE_MEMBLOCK_NODE_MAP
 	select ARCH_DISCARD_MEMBLOCK
 	select GENERIC_SMP_IDLE_THREAD
-	select GENERIC_IDLE_LOOP
 	select BUILDTIME_EXTABLE_SORT
 	select GENERIC_CLOCKEVENTS
 	select GENERIC_CMOS_UPDATE

arch/mn10300/Kconfig

@@ -13,7 +13,6 @@ config MN10300
 	select MODULES_USE_ELF_RELA
 	select OLD_SIGSUSPEND3
 	select OLD_SIGACTION
-	select GENERIC_IDLE_LOOP
 
 config AM33_2
 	def_bool n

arch/openrisc/Kconfig

@@ -21,7 +21,6 @@ config OPENRISC
 	select GENERIC_CLOCKEVENTS
 	select GENERIC_STRNCPY_FROM_USER
 	select GENERIC_STRNLEN_USER
-	select GENERIC_IDLE_LOOP
 	select MODULES_USE_ELF_RELA
 
 config MMU

arch/parisc/Kconfig

@@ -18,7 +18,6 @@ config PARISC
 	select GENERIC_PCI_IOMAP
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select GENERIC_SMP_IDLE_THREAD
-	select GENERIC_IDLE_LOOP
 	select GENERIC_STRNCPY_FROM_USER
 	select SYSCTL_ARCH_UNALIGN_ALLOW
 	select HAVE_MOD_ARCH_SPECIFIC

arch/powerpc/Kconfig

@@ -133,7 +133,6 @@ config PPC
 	select HAVE_ARCH_JUMP_LABEL
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select GENERIC_SMP_IDLE_THREAD
-	select GENERIC_IDLE_LOOP
 	select GENERIC_CMOS_UPDATE
 	select GENERIC_TIME_VSYSCALL_OLD
 	select GENERIC_CLOCKEVENTS

arch/s390/Kconfig

@@ -97,7 +97,6 @@ config S390
 	select CLONE_BACKWARDS2
 	select GENERIC_CLOCKEVENTS
 	select GENERIC_CPU_DEVICES if !SMP
-	select GENERIC_IDLE_LOOP
 	select GENERIC_KERNEL_THREAD
 	select GENERIC_SMP_IDLE_THREAD
 	select GENERIC_TIME_VSYSCALL_OLD

arch/score/Kconfig

@@ -11,7 +11,6 @@ config SCORE
        select ARCH_DISCARD_MEMBLOCK
        select GENERIC_CPU_DEVICES
        select GENERIC_CLOCKEVENTS
-       select GENERIC_IDLE_LOOP
        select HAVE_MOD_ARCH_SPECIFIC
 	select VIRT_TO_BUS
 	select MODULES_USE_ELF_REL

arch/sh/Kconfig

@@ -33,7 +33,6 @@ config SUPERH
 	select GENERIC_ATOMIC64
 	select GENERIC_IRQ_SHOW
 	select GENERIC_SMP_IDLE_THREAD
-	select GENERIC_IDLE_LOOP
 	select GENERIC_IDLE_POLL_SETUP
 	select GENERIC_CLOCKEVENTS
 	select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST

arch/sparc/Kconfig

@@ -37,7 +37,6 @@ config SPARC
 	select GENERIC_SMP_IDLE_THREAD
 	select GENERIC_CMOS_UPDATE
 	select GENERIC_CLOCKEVENTS
-	select GENERIC_IDLE_LOOP
 	select GENERIC_STRNCPY_FROM_USER
 	select GENERIC_STRNLEN_USER
 	select MODULES_USE_ELF_RELA

arch/tile/Kconfig

@@ -22,7 +22,6 @@ config TILE
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select GENERIC_CLOCKEVENTS
 	select MODULES_USE_ELF_RELA
-	select GENERIC_IDLE_LOOP
 
 # FIXME: investigate whether we need/want these options.
 #	select HAVE_IOREMAP_PROT

arch/um/Kconfig.common

@@ -12,7 +12,6 @@ config UML
 	select GENERIC_CPU_DEVICES
 	select GENERIC_IO
 	select GENERIC_CLOCKEVENTS
-	select GENERIC_IDLE_LOOP
 	select TTY # Needed for line.c
 
 config MMU

arch/unicore32/Kconfig

@@ -17,7 +17,6 @@ config UNICORE32
 	select ARCH_WANT_FRAME_POINTERS
 	select GENERIC_IOMAP
 	select MODULES_USE_ELF_REL
-	select GENERIC_IDLE_LOOP
 	help
 	  UniCore-32 is 32-bit Instruction Set Architecture,
 	  including a series of low-power-consumption RISC chip

arch/x86/Kconfig

@@ -97,7 +97,6 @@ config X86
 	select GENERIC_IOMAP
 	select DCACHE_WORD_ACCESS
 	select GENERIC_SMP_IDLE_THREAD
-	select GENERIC_IDLE_LOOP
 	select ARCH_WANT_IPC_PARSE_VERSION if X86_32
 	select HAVE_ARCH_SECCOMP_FILTER
 	select BUILDTIME_EXTABLE_SORT

arch/xtensa/Kconfig

@@ -19,7 +19,6 @@ config XTENSA
 	select CLONE_BACKWARDS
 	select IRQ_DOMAIN
 	select HAVE_OPROFILE
-	select GENERIC_IDLE_LOOP
 	help
 	  Xtensa processors are 32-bit RISC machines designed by Tensilica
 	  primarily for embedded systems.  These processors are both

kernel/cpu/idle.c

@@ -10,13 +10,6 @@
 
 #include <trace/events/power.h>
 
-#ifndef CONFIG_GENERIC_IDLE_LOOP
-void cpu_startup_entry(enum cpuhp_state state)
-{
-	cpu_idle();
-}
-#else
-
 static int __read_mostly cpu_idle_force_poll;
 
 void cpu_idle_poll_ctrl(bool enable)
@@ -112,4 +105,3 @@ void cpu_startup_entry(enum cpuhp_state state)
 	arch_cpu_idle_prepare();
 	cpu_idle_loop();
 }
-#endif