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Subject[tip:timers/clocksource] time: Kill off CONFIG_GENERIC_TIME
Commit-ID:  592913ecb87a9e06f98ddb55b298f1a66bf94c6b
Gitweb: http://git.kernel.org/tip/592913ecb87a9e06f98ddb55b298f1a66bf94c6b
Author: John Stultz <johnstul@us.ibm.com>
AuthorDate: Tue, 13 Jul 2010 17:56:20 -0700
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Tue, 27 Jul 2010 12:40:54 +0200

time: Kill off CONFIG_GENERIC_TIME

Now that all arches have been converted over to use generic time via
clocksources or arch_gettimeoffset(), we can remove the GENERIC_TIME
config option and simplify the generic code.

Signed-off-by: John Stultz <johnstul@us.ibm.com>
LKML-Reference: <1279068988-21864-4-git-send-email-johnstul@us.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
Documentation/kernel-parameters.txt | 3 +-
arch/alpha/Kconfig | 4 --
arch/arm/Kconfig | 4 --
arch/avr32/Kconfig | 3 --
arch/blackfin/Kconfig | 3 --
arch/cris/Kconfig | 3 --
arch/frv/Kconfig | 4 --
arch/h8300/Kconfig | 4 --
arch/ia64/Kconfig | 4 --
arch/m32r/Kconfig | 3 --
arch/m68k/Kconfig | 3 --
arch/m68knommu/Kconfig | 4 --
arch/microblaze/Kconfig | 3 --
arch/mips/Kconfig | 4 --
arch/mn10300/Kconfig | 3 --
arch/parisc/Kconfig | 4 --
arch/powerpc/Kconfig | 3 --
arch/s390/Kconfig | 3 --
arch/score/Kconfig | 3 --
arch/sh/Kconfig | 3 --
arch/sparc/Kconfig | 3 --
arch/um/Kconfig.common | 4 --
arch/x86/Kconfig | 5 +--
arch/xtensa/Kconfig | 3 --
drivers/Makefile | 4 ++-
drivers/acpi/acpi_pad.c | 2 +-
drivers/acpi/processor_idle.c | 2 +-
drivers/misc/Kconfig | 4 +-
kernel/time.c | 16 ----------
kernel/time/Kconfig | 4 +-
kernel/time/clocksource.c | 4 +-
kernel/time/timekeeping.c | 55 ++--------------------------------
kernel/trace/Kconfig | 4 +-
33 files changed, 19 insertions(+), 159 deletions(-)
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 2b2407d..8abdfd7 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -73,7 +73,6 @@ 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.
@@ -468,7 +467,7 @@ 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 3e2e540..b9647bb 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -47,10 +47,6 @@ config GENERIC_CALIBRATE_DELAY
bool
default y

-config GENERIC_TIME
- bool
- default y
-
config GENERIC_CMOS_UPDATE
def_bool y

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 98922f7..655b4ae 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -41,10 +41,6 @@ config SYS_SUPPORTS_APM_EMULATION
config GENERIC_GPIO
bool

-config GENERIC_TIME
- bool
- default y
-
config ARCH_USES_GETTIMEOFFSET
bool
default n
diff --git a/arch/avr32/Kconfig b/arch/avr32/Kconfig
index f2b3193..f515727 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 f66294b..c88fd35 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -614,9 +614,6 @@ comment "Kernel Timer/Scheduler"

source kernel/Kconfig.hz

-config GENERIC_TIME
- def_bool y
-
config GENERIC_CLOCKEVENTS
bool "Generic clock events"
default y
diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig
index e25bf44..887ef85 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 GENERIC_CMOS_UPDATE
def_bool y

diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig
index 4b5830b..16399bd 100644
--- a/arch/frv/Kconfig
+++ b/arch/frv/Kconfig
@@ -40,10 +40,6 @@ 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 53cc669..988b6ff 100644
--- a/arch/h8300/Kconfig
+++ b/arch/h8300/Kconfig
@@ -62,10 +62,6 @@ 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 9561082..8711d13 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -82,10 +82,6 @@ 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 3a9319f..836abbb 100644
--- a/arch/m32r/Kconfig
+++ b/arch/m32r/Kconfig
@@ -44,9 +44,6 @@ 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 2e3737b..8030e24 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -59,9 +59,6 @@ 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 efeb603..2609c39 100644
--- a/arch/m68knommu/Kconfig
+++ b/arch/m68knommu/Kconfig
@@ -63,10 +63,6 @@ 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 505a085..14f03ce 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -48,9 +48,6 @@ 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 cdaae94..01c44cb 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -733,10 +733,6 @@ 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 1c4565a..444b9f9 100644
--- a/arch/mn10300/Kconfig
+++ b/arch/mn10300/Kconfig
@@ -46,9 +46,6 @@ 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 05a366a..907417d 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -66,10 +66,6 @@ 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 2031a28..25e6bf4 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 bee1c0f..f0777a4 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/score/Kconfig b/arch/score/Kconfig
index 55d413e..be4a155 100644
--- a/arch/score/Kconfig
+++ b/arch/score/Kconfig
@@ -55,9 +55,6 @@ config GENERIC_CALIBRATE_DELAY
config GENERIC_CLOCKEVENTS
def_bool y

-config GENERIC_TIME
- def_bool y
-
config SCHED_NO_NO_OMIT_FRAME_POINTER
def_bool y

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 82868fe..33990fa 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -98,9 +98,6 @@ config GENERIC_CALIBRATE_DELAY
config GENERIC_IOMAP
bool

-config GENERIC_TIME
- def_bool y
-
config GENERIC_CLOCKEVENTS
def_bool y

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index c0015db..1cd0d9d 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -66,9 +66,6 @@ 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 dcb0593..546b610a 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -72,9 +72,6 @@ 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

@@ -2046,7 +2043,7 @@ 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
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index ebe228d..0859bfd 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 91874e0..ae47344 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -101,7 +101,9 @@ obj-y += firmware/
obj-$(CONFIG_CRYPTO) += crypto/
obj-$(CONFIG_SUPERH) += sh/
obj-$(CONFIG_ARCH_SHMOBILE) += sh/
-obj-$(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/acpi_pad.c b/drivers/acpi/acpi_pad.c
index 446aced..b76848c 100644
--- a/drivers/acpi/acpi_pad.c
+++ b/drivers/acpi/acpi_pad.c
@@ -77,7 +77,7 @@ static void power_saving_mwait_init(void)
power_saving_mwait_eax = (highest_cstate << MWAIT_SUBSTATE_SIZE) |
(highest_subcstate - 1);

-#if defined(CONFIG_GENERIC_TIME) && defined(CONFIG_X86)
+#if defined(CONFIG_X86)
switch (boot_cpu_data.x86_vendor) {
case X86_VENDOR_AMD:
case X86_VENDOR_INTEL:
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index e9a8026..294e10b 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -264,7 +264,7 @@ int acpi_processor_resume(struct acpi_device * device)
return 0;
}

-#if defined (CONFIG_GENERIC_TIME) && defined (CONFIG_X86)
+#if defined(CONFIG_X86)
static void tsc_check_state(int state)
{
switch (boot_cpu_data.x86_vendor) {
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 26386a9..5b9ba48 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -72,7 +72,7 @@ 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
@@ -240,7 +240,7 @@ config CS5535_MFGPT_DEFAULT_IRQ

config CS5535_CLOCK_EVENT_SRC
tristate "CS5535/CS5536 high-res timer (MFGPT) events"
- depends on GENERIC_TIME && GENERIC_CLOCKEVENTS && CS5535_MFGPT
+ depends on GENERIC_CLOCKEVENTS && CS5535_MFGPT
help
This driver provides a clock event source based on the MFGPT
timer(s) in the CS5535 and CS5536 companion chips.
diff --git a/kernel/time.c b/kernel/time.c
index 848b1c2..ba9b338 100644
--- a/kernel/time.c
+++ b/kernel/time.c
@@ -300,22 +300,6 @@ 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/clocksource.c b/kernel/time/clocksource.c
index f08e99c..c543d21 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -531,7 +531,7 @@ static u64 clocksource_max_deferment(struct clocksource *cs)
return max_nsecs - (max_nsecs >> 5);
}

-#ifdef CONFIG_GENERIC_TIME
+#ifndef CONFIG_ARCH_USES_GETTIMEOFFSET

/**
* clocksource_select - Select the best clocksource available
@@ -577,7 +577,7 @@ static void clocksource_select(void)
}
}

-#else /* CONFIG_GENERIC_TIME */
+#else /* !CONFIG_ARCH_USES_GETTIMEOFFSET */

static inline void clocksource_select(void) { }

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 623fe3d..73edd40 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -173,8 +173,6 @@ void timekeeping_leap_insert(int leapsecond)
update_vsyscall(&xtime, timekeeper.clock, timekeeper.mult);
}

-#ifdef CONFIG_GENERIC_TIME
-
/**
* timekeeping_forward_now - update clock to the current time
*
@@ -376,52 +374,6 @@ void timekeeping_notify(struct clocksource *clock)
tick_clock_notify();
}

-#else /* GENERIC_TIME */
-
-static inline void timekeeping_forward_now(void) { }
-
-/**
- * ktime_get - get the monotonic time in ktime_t format
- *
- * returns the time in ktime_t format
- */
-ktime_t ktime_get(void)
-{
- struct timespec now;
-
- ktime_get_ts(&now);
-
- return timespec_to_ktime(now);
-}
-EXPORT_SYMBOL_GPL(ktime_get);
-
-/**
- * ktime_get_ts - get the monotonic clock in timespec format
- * @ts: pointer to timespec variable
- *
- * The function calculates the monotonic clock from the realtime
- * clock and the wall_to_monotonic offset and stores the result
- * in normalized timespec format in the variable pointed to by @ts.
- */
-void ktime_get_ts(struct timespec *ts)
-{
- struct timespec tomono;
- unsigned long seq;
-
- do {
- seq = read_seqbegin(&xtime_lock);
- getnstimeofday(ts);
- tomono = wall_to_monotonic;
-
- } while (read_seqretry(&xtime_lock, seq));
-
- set_normalized_timespec(ts, ts->tv_sec + tomono.tv_sec,
- ts->tv_nsec + tomono.tv_nsec);
-}
-EXPORT_SYMBOL_GPL(ktime_get_ts);
-
-#endif /* !GENERIC_TIME */
-
/**
* ktime_get_real - get the real (wall-) time in ktime_t format
*
@@ -784,10 +736,11 @@ void update_wall_time(void)
return;

clock = timekeeper.clock;
-#ifdef CONFIG_GENERIC_TIME
- offset = (clock->read(clock) - clock->cycle_last) & clock->mask;
-#else
+
+#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
offset = timekeeper.cycle_interval;
+#else
+ offset = (clock->read(clock) - clock->cycle_last) & clock->mask;
#endif
timekeeper.xtime_nsec = (s64)xtime.tv_nsec << timekeeper.shift;

diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 8b1797c..7531dda 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -153,7 +153,7 @@ 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 GENERIC_TRACER
select TRACER_MAX_TRACE
@@ -175,7 +175,7 @@ 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 GENERIC_TRACER
select TRACER_MAX_TRACE

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