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Date: Tue, 14 Apr 2009 18:53:22 -0700
From: john stultz <johnstul@...ibm.com>
To: lkml <linux-kernel@...r.kernel.org>
Cc: rmk+lkml@....linux.org.uk, cooloney@...nel.org, starvik@...s.com,
takata@...ux-m32r.org, geert@...ux-m68k.org,
Roman Zippel <zippel@...ux-m68k.org>, lethal@...ux-sh.org,
Magnus Damm <magnus.damm@...il.com>, wli@...omorphy.com,
rth@...ddle.net
Subject: [RFC][PATCH 8/8] Remove CONFIG_GENERIC_TIME
This removes all references to CONFIG_GENERIC_TIME in the timekeeping
core as well as the arch Kconfig files.
Arch defconfig files were left alone.
Signed-off-by: John Stultz <johnstul@...ibm.com>
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 6172e43..d6769ff 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -64,7 +64,6 @@ parameter is applicable:
MTD MTD (Memory Technology Device) support is enabled.
NET Appropriate network support is enabled.
NUMA NUMA support is enabled.
- GENERIC_TIME The generic timeofday code is enabled.
NFS Appropriate NFS support is enabled.
OSS OSS sound support is enabled.
PV_OPS A paravirtualized kernel is enabled.
@@ -426,7 +425,7 @@ and is between 256 and 4096 characters. It is defined in the file
clocksource is not available, it defaults to PIT.
Format: { pit | tsc | cyclone | pmtmr }
- clocksource= [GENERIC_TIME] Override the default clocksource
+ clocksource= Override the default clocksource
Format: <string>
Override the default clocksource and use the clocksource
with the name specified.
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index 4434481..e2251b5 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -45,10 +45,6 @@ config GENERIC_CALIBRATE_DELAY
bool
default y
-config GENERIC_TIME
- bool
- default y
-
config ARCH_USES_GETTIMEOFFSET
bool
default y
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 61c88e1..37f3bda 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -36,10 +36,6 @@ config GENERIC_GPIO
bool
default n
-config GENERIC_TIME
- bool
- default y
-
config GENERIC_CLOCKEVENTS
bool
default n
diff --git a/arch/avr32/Kconfig b/arch/avr32/Kconfig
index 35e3bd9..0b1e70d 100644
--- a/arch/avr32/Kconfig
+++ b/arch/avr32/Kconfig
@@ -45,9 +45,6 @@ config GENERIC_IRQ_PROBE
config RWSEM_GENERIC_SPINLOCK
def_bool y
-config GENERIC_TIME
- def_bool y
-
config GENERIC_CLOCKEVENTS
def_bool y
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index 2b41547..7be2b94 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -605,12 +605,8 @@ comment "Kernel Timer/Scheduler"
source kernel/Kconfig.hz
-config GENERIC_TIME
- def_bool y
-
config GENERIC_CLOCKEVENTS
bool "Generic clock events"
- depends on GENERIC_TIME
default y
config CYCLES_CLOCKSOURCE
diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig
index 059eac6..a668ce1 100644
--- a/arch/cris/Kconfig
+++ b/arch/cris/Kconfig
@@ -20,9 +20,6 @@ config RWSEM_GENERIC_SPINLOCK
config RWSEM_XCHGADD_ALGORITHM
bool
-config GENERIC_TIME
- def_bool y
-
config ARCH_USES_GETTIMEOFFSET
def_bool y
diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig
index 9d1552a..42c3497 100644
--- a/arch/frv/Kconfig
+++ b/arch/frv/Kconfig
@@ -38,10 +38,6 @@ config GENERIC_HARDIRQS_NO__DO_IRQ
bool
default y
-config GENERIC_TIME
- bool
- default y
-
config TIME_LOW_RES
bool
default y
diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig
index 9420648..3bf6e51 100644
--- a/arch/h8300/Kconfig
+++ b/arch/h8300/Kconfig
@@ -58,10 +58,6 @@ config GENERIC_CALIBRATE_DELAY
bool
default y
-config GENERIC_TIME
- bool
- default y
-
config GENERIC_BUG
bool
depends on BUG
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 294a3b1..5e1df8c 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -80,10 +80,6 @@ config GENERIC_CALIBRATE_DELAY
bool
default y
-config GENERIC_TIME
- bool
- default y
-
config GENERIC_TIME_VSYSCALL
bool
default y
diff --git a/arch/m32r/Kconfig b/arch/m32r/Kconfig
index c41234f..32ad821 100644
--- a/arch/m32r/Kconfig
+++ b/arch/m32r/Kconfig
@@ -41,9 +41,6 @@ config HZ
int
default 100
-config GENERIC_TIME
- def_bool y
-
config ARCH_USES_GETTIMEOFFSET
def_bool y
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 29dd848..7b0f880 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -58,9 +58,6 @@ config HZ
int
default 100
-config GENERIC_TIME
- def_bool y
-
config ARCH_USES_GETTIMEOFFSET
def_bool y
diff --git a/arch/m68knommu/Kconfig b/arch/m68knommu/Kconfig
index 4beb59d..2806400 100644
--- a/arch/m68knommu/Kconfig
+++ b/arch/m68knommu/Kconfig
@@ -58,10 +58,6 @@ config GENERIC_CALIBRATE_DELAY
bool
default y
-config GENERIC_TIME
- bool
- default y
-
config GENERIC_CMOS_UPDATE
bool
default y
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 8cc312b..73d9963 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -37,9 +37,6 @@ config GENERIC_IRQ_PROBE
config GENERIC_CALIBRATE_DELAY
def_bool y
-config GENERIC_TIME
- def_bool y
-
config GENERIC_TIME_VSYSCALL
def_bool n
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 998e5db..8e1be85 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -680,10 +680,6 @@ config GENERIC_CLOCKEVENTS
bool
default y
-config GENERIC_TIME
- bool
- default y
-
config GENERIC_CMOS_UPDATE
bool
default y
diff --git a/arch/mn10300/Kconfig b/arch/mn10300/Kconfig
index 3559267..bab6c1f 100644
--- a/arch/mn10300/Kconfig
+++ b/arch/mn10300/Kconfig
@@ -42,9 +42,6 @@ config GENERIC_FIND_NEXT_BIT
config GENERIC_HWEIGHT
def_bool y
-config GENERIC_TIME
- def_bool y
-
config GENERIC_BUG
def_bool y
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 9038f39..c42c0b4 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -64,10 +64,6 @@ config GENERIC_CALIBRATE_DELAY
bool
default y
-config GENERIC_TIME
- bool
- default y
-
config TIME_LOW_RES
bool
depends on SMP
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 5b50e1a..c3f6489 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -29,9 +29,6 @@ config MMU
config GENERIC_CMOS_UPDATE
def_bool y
-config GENERIC_TIME
- def_bool y
-
config GENERIC_TIME_VSYSCALL
def_bool y
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 2eca5fe..dae9e1b 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -40,9 +40,6 @@ config ARCH_HAS_ILOG2_U64
config GENERIC_HWEIGHT
def_bool y
-config GENERIC_TIME
- def_bool y
-
config GENERIC_TIME_VSYSCALL
def_bool y
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 8a13c1a..23ffcae 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -73,9 +73,6 @@ config GENERIC_CALIBRATE_DELAY
config GENERIC_IOMAP
bool
-config GENERIC_TIME
- def_bool y
-
config GENERIC_CLOCKEVENTS
def_bool n
@@ -446,7 +443,6 @@ config SH_TMU
bool "TMU timer support"
depends on CPU_SH3 || CPU_SH4
default y
- select GENERIC_TIME
select GENERIC_CLOCKEVENTS
help
This enables the use of the TMU as the system timer.
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 1358aab..527efea 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -54,9 +54,6 @@ config BITS
default 32 if SPARC32
default 64 if SPARC64
-config GENERIC_TIME
- def_bool y
-
config ARCH_USES_GETTIMEOFFSET
bool
default y if SPARC32
diff --git a/arch/um/Kconfig.common b/arch/um/Kconfig.common
index 0d207e7..7c8e277 100644
--- a/arch/um/Kconfig.common
+++ b/arch/um/Kconfig.common
@@ -55,10 +55,6 @@ config GENERIC_BUG
default y
depends on BUG
-config GENERIC_TIME
- bool
- default y
-
config GENERIC_CLOCKEVENTS
bool
default y
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index bc25b9f..c73cb50 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -52,9 +52,6 @@ config ARCH_DEFCONFIG
default "arch/x86/configs/i386_defconfig" if X86_32
default "arch/x86/configs/x86_64_defconfig" if X86_64
-config GENERIC_TIME
- def_bool y
-
config GENERIC_CMOS_UPDATE
def_bool y
@@ -1942,7 +1939,7 @@ config SCx200
config SCx200HR_TIMER
tristate "NatSemi SCx200 27MHz High-Resolution Timer Support"
- depends on SCx200 && GENERIC_TIME
+ depends on SCx200
default y
---help---
This driver provides a clocksource built upon the on-chip
@@ -1954,7 +1951,7 @@ config SCx200HR_TIMER
config GEODE_MFGPT_TIMER
def_bool y
prompt "Geode Multi-Function General Purpose Timer (MFGPT) events"
- depends on MGEODE_LX && GENERIC_TIME && GENERIC_CLOCKEVENTS
+ depends on MGEODE_LX && GENERIC_CLOCKEVENTS
---help---
This driver provides a clock event source based on the MFGPT
timer(s) in the CS5535 and CS5536 companion chip for the geode.
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index fa6dc4d..7bbc6c1 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -48,9 +48,6 @@ config HZ
int
default 100
-config GENERIC_TIME
- def_bool y
-
source "init/Kconfig"
source "kernel/Kconfig.freezer"
diff --git a/drivers/Makefile b/drivers/Makefile
index 2618a61..953bc52 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -97,7 +97,9 @@ obj-$(CONFIG_SGI_SN) += sn/
obj-y += firmware/
obj-$(CONFIG_CRYPTO) += crypto/
obj-$(CONFIG_SUPERH) += sh/
-obj-$(CONFIG_GENERIC_TIME) += clocksource/
+ifndef CONFIG_ARCH_USES_GETTIMEOFFSET
+obj-y += clocksource/
+endif
obj-$(CONFIG_DMA_ENGINE) += dma/
obj-$(CONFIG_DCA) += dca/
obj-$(CONFIG_HID) += hid/
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 6fe1214..84bee72 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -215,7 +215,7 @@ int acpi_processor_resume(struct acpi_device * device)
return 0;
}
-#if defined (CONFIG_GENERIC_TIME) && defined (CONFIG_X86)
+#if defined (CONFIG_X86)
static int tsc_halts_in_c(int state)
{
switch (boot_cpu_data.x86_vendor) {
@@ -871,7 +871,7 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
kt2 = ktime_get_real();
idle_time = ktime_to_us(ktime_sub(kt2, kt1));
-#if defined (CONFIG_GENERIC_TIME) && defined (CONFIG_X86)
+#if defined (CONFIG_X86)
/* TSC could halt in idle, so notify users */
if (tsc_halts_in_c(cx->type))
mark_tsc_unstable("TSC halts in idle");;
@@ -989,7 +989,7 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
spin_unlock(&c3_lock);
}
-#if defined (CONFIG_GENERIC_TIME) && defined (CONFIG_X86)
+#if defined (CONFIG_X86)
/* TSC could halt in idle, so notify users */
if (tsc_halts_in_c(ACPI_STATE_C3))
mark_tsc_unstable("TSC halts in idle");
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 6d1ac18..1a2be66 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -32,7 +32,7 @@ config ATMEL_TCLIB
config ATMEL_TCB_CLKSRC
bool "TC Block Clocksource"
- depends on ATMEL_TCLIB && GENERIC_TIME
+ depends on ATMEL_TCLIB
default y
help
Select this to get a high precision clocksource based on a
diff --git a/kernel/time.c b/kernel/time.c
index 2951194..f001888 100644
--- a/kernel/time.c
+++ b/kernel/time.c
@@ -302,22 +302,6 @@ struct timespec timespec_trunc(struct timespec t, unsigned gran)
}
EXPORT_SYMBOL(timespec_trunc);
-#ifndef CONFIG_GENERIC_TIME
-/*
- * Simulate gettimeofday using do_gettimeofday which only allows a timeval
- * and therefore only yields usec accuracy
- */
-void getnstimeofday(struct timespec *tv)
-{
- struct timeval x;
-
- do_gettimeofday(&x);
- tv->tv_sec = x.tv_sec;
- tv->tv_nsec = x.tv_usec * NSEC_PER_USEC;
-}
-EXPORT_SYMBOL_GPL(getnstimeofday);
-#endif
-
/* Converts Gregorian date to seconds since 1970-01-01 00:00:00.
* Assumes input in normal date format, i.e. 1980-12-31 23:59:59
* => year=1980, mon=12, day=31, hour=23, min=59, sec=59.
diff --git a/kernel/time/Kconfig b/kernel/time/Kconfig
index 95ed429..f06a8a3 100644
--- a/kernel/time/Kconfig
+++ b/kernel/time/Kconfig
@@ -6,7 +6,7 @@ config TICK_ONESHOT
config NO_HZ
bool "Tickless System (Dynamic Ticks)"
- depends on GENERIC_TIME && GENERIC_CLOCKEVENTS
+ depends on !ARCH_USES_GETTIMEOFFSET && GENERIC_CLOCKEVENTS
select TICK_ONESHOT
help
This option enables a tickless system: timer interrupts will
@@ -15,7 +15,7 @@ config NO_HZ
config HIGH_RES_TIMERS
bool "High Resolution Timer Support"
- depends on GENERIC_TIME && GENERIC_CLOCKEVENTS
+ depends on !ARCH_USES_GETTIMEOFFSET && GENERIC_CLOCKEVENTS
select TICK_ONESHOT
help
This option enables high resolution timer support. If your
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 45d777f..7b0575c 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -59,7 +59,6 @@ void update_xtime_cache(u64 nsec)
struct clocksource *clock;
-#ifdef CONFIG_GENERIC_TIME
/**
* clocksource_forward_now - update clock to the current time
*
@@ -182,6 +181,7 @@ int do_settimeofday(struct timespec *tv)
EXPORT_SYMBOL(do_settimeofday);
+#ifndef CONFIG_ARCH_USES_GETTIMEOFFSET
/**
* change_clocksource - Swaps clocksources if a new one is available
*
@@ -217,7 +217,6 @@ static void change_clocksource(void)
*/
}
#else
-static inline void clocksource_forward_now(void) { }
static inline void change_clocksource(void) { }
#endif
@@ -492,10 +491,10 @@ void update_wall_time(void)
if (unlikely(timekeeping_suspended))
return;
-#ifdef CONFIG_GENERIC_TIME
- offset = (clocksource_read(clock) - clock->cycle_last) & clock->mask;
-#else
+#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
offset = clock->cycle_interval;
+#else
+ offset = (clocksource_read(clock) - clock->cycle_last) & clock->mask;
#endif
clock->xtime_nsec = (s64)xtime.tv_nsec << clock->shift;
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 417d198..b156fee 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -108,7 +108,7 @@ config IRQSOFF_TRACER
bool "Interrupts-off Latency Tracer"
default n
depends on TRACE_IRQFLAGS_SUPPORT
- depends on GENERIC_TIME
+ depends on !ARCH_USES_GETTIMEOFFSET
select TRACE_IRQFLAGS
select TRACING
select TRACER_MAX_TRACE
@@ -129,7 +129,7 @@ config IRQSOFF_TRACER
config PREEMPT_TRACER
bool "Preemption-off Latency Tracer"
default n
- depends on GENERIC_TIME
+ depends on !ARCH_USES_GETTIMEOFFSET
depends on PREEMPT
select TRACING
select TRACER_MAX_TRACE
--
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