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| author | Arnd Bergmann <arnd@arndb.de> | 2020-09-24 11:32:40 +0200 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2020-10-30 21:57:07 +0100 |
| commit | 0774a6ed294b963dc76df2d8342ab86d030759ec (patch) | |
| tree | ee12b2df3a2a74f576ae42d1487e9a9b37c13e54 /arch/arm/Kconfig | |
| parent | 56cc7b8acfb7c763f71c0492fa8da01dca7c1760 (diff) | |
| download | linux-0774a6ed294b963dc76df2d8342ab86d030759ec.tar.bz2 | |
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>
Diffstat (limited to 'arch/arm/Kconfig')
| -rw-r--r-- | arch/arm/Kconfig | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index a652686c3b32..446c6c88e47f 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -321,7 +321,6 @@ config ARCH_MULTIPLATFORM select AUTO_ZRELADDR select TIMER_OF select COMMON_CLK - select GENERIC_CLOCKEVENTS select GENERIC_IRQ_MULTI_HANDLER select HAVE_PCI select PCI_DOMAINS_GENERIC if PCI @@ -336,7 +335,6 @@ config ARM_SINGLE_ARMV7M select TIMER_OF select COMMON_CLK select CPU_V7M - select GENERIC_CLOCKEVENTS select NO_IOPORT_MAP select SPARSE_IRQ select USE_OF @@ -351,7 +349,6 @@ config ARCH_EP93XX select CLKDEV_LOOKUP select CLKSRC_MMIO select CPU_ARM920T - select GENERIC_CLOCKEVENTS select GPIOLIB select HAVE_LEGACY_CLK help @@ -361,7 +358,6 @@ config ARCH_FOOTBRIDGE bool "FootBridge" select CPU_SA110 select FOOTBRIDGE - select GENERIC_CLOCKEVENTS select HAVE_IDE select NEED_MACH_IO_H if !MMU select NEED_MACH_MEMORY_H @@ -389,7 +385,6 @@ config ARCH_IXP4XX select ARCH_SUPPORTS_BIG_ENDIAN select CPU_XSCALE select DMABOUNCE if PCI - select GENERIC_CLOCKEVENTS select GENERIC_IRQ_MULTI_HANDLER select GPIO_IXP4XX select GPIOLIB @@ -405,7 +400,6 @@ config ARCH_IXP4XX config ARCH_DOVE bool "Marvell Dove" select CPU_PJ4 - select GENERIC_CLOCKEVENTS select GENERIC_IRQ_MULTI_HANDLER select GPIOLIB select HAVE_PCI @@ -429,7 +423,6 @@ config ARCH_PXA select CLKSRC_MMIO select TIMER_OF select CPU_XSCALE if !CPU_XSC3 - select GENERIC_CLOCKEVENTS select GENERIC_IRQ_MULTI_HANDLER select GPIO_PXA select GPIOLIB @@ -470,7 +463,6 @@ config ARCH_SA1100 select COMMON_CLK select CPU_FREQ select CPU_SA1100 - select GENERIC_CLOCKEVENTS select GENERIC_IRQ_MULTI_HANDLER select GPIOLIB select HAVE_IDE @@ -485,7 +477,6 @@ config ARCH_S3C24XX bool "Samsung S3C24XX SoCs" select ATAGS select CLKSRC_SAMSUNG_PWM - select GENERIC_CLOCKEVENTS select GPIO_SAMSUNG select GPIOLIB select GENERIC_IRQ_MULTI_HANDLER @@ -509,7 +500,6 @@ config ARCH_OMAP1 select ARCH_OMAP select CLKDEV_LOOKUP select CLKSRC_MMIO - select GENERIC_CLOCKEVENTS select GENERIC_IRQ_CHIP select GENERIC_IRQ_MULTI_HANDLER select GPIOLIB @@ -772,7 +762,6 @@ config ARCH_ACORN config PLAT_IOP bool - select GENERIC_CLOCKEVENTS config PLAT_ORION bool @@ -1163,7 +1152,6 @@ config HAVE_SMP config SMP bool "Symmetric Multi-Processing" depends on CPU_V6K || CPU_V7 - depends on GENERIC_CLOCKEVENTS depends on HAVE_SMP depends on MMU || ARM_MPU select IRQ_WORK |