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Date: Mon, 01 Mar 2010 14:56:04 -0800
From: john stultz <johnstul@...ibm.com>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: lkml <linux-kernel@...r.kernel.org>,
Andrew Morton <akpm@...ux-foundation.org>, starvik@...s.com,
jesper.nilsson@...s.com, Russell King <rmk@....linux.org.uk>
Subject: [PATCH 3/3] 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@...ibm.com>
---
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/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/clocksource/Kconfig | 2 +-
drivers/misc/Kconfig | 2 +-
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(+), 156 deletions(-)
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 8c666d8..87ea67b 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -71,7 +71,6 @@ 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.
@@ -472,7 +471,7 @@ 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 bd7261e..b7dbb7f 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -46,10 +46,6 @@ 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 ff8e0b4..cec899f 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -40,10 +40,6 @@ 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 53c1e1d..a891f0a 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -602,9 +602,6 @@ 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 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 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 9a50d7d..177d0db 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -79,10 +79,6 @@ 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 b5da298..ee3ed05 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 064f591..fb61afe 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 b008168..adbfd0c 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -46,9 +46,6 @@ 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 591ca0c..1448600 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -731,10 +731,6 @@ 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 89faaca..fb2d232 100644
--- a/arch/mn10300/Kconfig
+++ b/arch/mn10300/Kconfig
@@ -43,9 +43,6 @@ 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 f388dc6..f7a4d3e 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 155d571..68d9df6 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 0d8cd9b..07ecd67 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 05cef50..5819a92 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -97,9 +97,6 @@ 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 4097f6a..49611c0 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -63,9 +63,6 @@ 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 0896008..014b8bc 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -67,9 +67,6 @@ 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
@@ -2006,7 +2003,7 @@ 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 6ee53c7..a059f91 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -99,7 +99,9 @@ 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/acpi_pad.c b/drivers/acpi/acpi_pad.c
index 7e52295..d144710 100644
--- a/drivers/acpi/acpi_pad.c
+++ b/drivers/acpi/acpi_pad.c
@@ -73,7 +73,7 @@ static void power_saving_mwait_init(void)
for_each_online_cpu(i)
clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ON, &i);
-#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 37dfce7..60efa42 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -258,7 +258,7 @@ 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/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 08f726c..f8d1d73 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -1,6 +1,6 @@
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/drivers/misc/Kconfig b/drivers/misc/Kconfig
index e3551d2..9da7433 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -46,7 +46,7 @@ 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 8047980..19f7b37 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/clocksource.c b/kernel/time/clocksource.c
index 1f663d2..208d1db 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 1673637..e81d319 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -180,8 +180,6 @@ 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
*
@@ -385,52 +383,6 @@ 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
*
@@ -796,10 +748,11 @@ 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 13e13d4..8930ba3 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -156,7 +156,7 @@ 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
@@ -178,7 +178,7 @@ 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
--
1.6.0.4
--
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