linux/arch/h8300/Kconfig
Arnd Bergmann 0774a6ed29 timekeeping: default GENERIC_CLOCKEVENTS to enabled
Almost all machines use GENERIC_CLOCKEVENTS, so it feels wrong to
require each one to select that symbol manually.

Instead, enable it whenever CONFIG_LEGACY_TIMER_TICK is disabled as
a simplification. It should be possible to select both
GENERIC_CLOCKEVENTS and LEGACY_TIMER_TICK from an architecture now
and decide at runtime between the two.

For the clockevents arch-support.txt file, this means that additional
architectures are marked as TODO when they have at least one machine
that still uses LEGACY_TIMER_TICK, rather than being marked 'ok' when
at least one machine has been converted. This means that both m68k and
arm (for riscpc) revert to TODO.

At this point, we could just always enable CONFIG_GENERIC_CLOCKEVENTS
rather than leaving it off when not needed. I built an m68k
defconfig kernel (using gcc-10.1.0) and found that this would add
around 5.5KB in kernel image size:

   text	   data	    bss	    dec	    hex	filename
3861936	1092236	 196656	5150828	 4e986c	obj-m68k/vmlinux-no-clockevent
3866201	1093832	 196184	5156217	 4ead79	obj-m68k/vmlinux-clockevent

On Arm (MACH_RPC), that difference appears to be twice as large,
around 11KB on top of an 6MB vmlinux.

Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2020-10-30 21:57:07 +01:00

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# SPDX-License-Identifier: GPL-2.0
config H8300
def_bool y
select ARCH_32BIT_OFF_T
select ARCH_HAS_BINFMT_FLAT
select BINFMT_FLAT_ARGVP_ENVP_ON_STACK
select BINFMT_FLAT_OLD_ALWAYS_RAM
select GENERIC_ATOMIC64
select HAVE_UID16
select VIRT_TO_BUS
select GENERIC_IRQ_SHOW
select FRAME_POINTER
select GENERIC_CPU_DEVICES
select MODULES_USE_ELF_RELA
select COMMON_CLK
select ARCH_WANT_FRAME_POINTERS
select OF
select OF_IRQ
select OF_EARLY_FLATTREE
select TIMER_OF
select H8300_TMR8
select HAVE_KERNEL_GZIP
select HAVE_KERNEL_LZO
select HAVE_ARCH_KGDB
select HAVE_ARCH_HASH
select CPU_NO_EFFICIENT_FFS
select SET_FS
select UACCESS_MEMCPY
config CPU_BIG_ENDIAN
def_bool y
config GENERIC_HWEIGHT
def_bool y
config NO_IOPORT_MAP
def_bool y
config GENERIC_CSUM
def_bool y
config HZ
int
default 100
config NR_CPUS
int
default 1
source "arch/h8300/Kconfig.cpu"