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Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Browse Source 
Pull timer updates from Thomas Gleixner.

Various trivial conflict fixups in arch Kconfig due to addition of
unrelated entries nearby.  And one slightly more subtle one for sparc32
(new user of GENERIC_CLOCKEVENTS), fixed up as per Thomas.

* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (31 commits)
  timekeeping: Fix a few minor newline issues.
  time: remove obsolete declaration
  ntp: Fix a stale comment and a few stray newlines.
  ntp: Correct TAI offset during leap second
  timers: Fixup the Kconfig consolidation fallout
  x86: Use generic time config
  unicore32: Use generic time config
  um: Use generic time config
  tile: Use generic time config
  sparc: Use: generic time config
  sh: Use generic time config
  score: Use generic time config
  s390: Use generic time config
  openrisc: Use generic time config
  powerpc: Use generic time config
  mn10300: Use generic time config
  mips: Use generic time config
  microblaze: Use generic time config
  m68k: Use generic time config
  m32r: Use generic time config
  ...
This commit is contained in:
Linus Torvalds 2012-05-24 13:29:46 -07:00
commit c7523a7c88
31 changed files with 155 additions and 225 deletions
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4
arch/alpha/Kconfig
View File

@ -16,6 +16,7 @@ config ALPHA
select ARCH_WANT_OPTIONAL_GPIOLIB
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select GENERIC_SMP_IDLE_THREAD
select GENERIC_CMOS_UPDATE
help
The Alpha is a 64-bit general-purpose processor designed and
marketed by the Digital Equipment Corporation of blessed memory,
@ -48,9 +49,6 @@ config GENERIC_CALIBRATE_DELAY
bool
default y
config GENERIC_CMOS_UPDATE
def_bool y
config GENERIC_GPIO
bool

20
arch/arm/Kconfig
View File

@ -40,6 +40,8 @@ config ARM
select GENERIC_PCI_IOMAP
select HAVE_BPF_JIT
select GENERIC_SMP_IDLE_THREAD
select KTIME_SCALAR
select GENERIC_CLOCKEVENTS_BROADCAST if SMP
help
The ARM series is a line of low-power-consumption RISC chip designs
licensed by ARM Ltd and targeted at embedded applications and
@ -63,22 +65,6 @@ config SYS_SUPPORTS_APM_EMULATION
config GENERIC_GPIO
bool
config ARCH_USES_GETTIMEOFFSET
bool
default n
config GENERIC_CLOCKEVENTS
bool
config GENERIC_CLOCKEVENTS_BROADCAST
bool
depends on GENERIC_CLOCKEVENTS
default y if SMP
config KTIME_SCALAR
bool
default y
config HAVE_TCM
bool
select GENERIC_ALLOCATOR
@ -1438,8 +1424,6 @@ endmenu
menu "Kernel Features"
source "kernel/time/Kconfig"
config HAVE_SMP
bool
help

6
arch/avr32/Kconfig
View File

@ -12,6 +12,7 @@ config AVR32
select HARDIRQS_SW_RESEND
select GENERIC_IRQ_SHOW
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select GENERIC_CLOCKEVENTS
help
AVR32 is a high-performance 32-bit RISC microprocessor core,
designed for cost-sensitive embedded applications, with particular
@ -35,9 +36,6 @@ config TRACE_IRQFLAGS_SUPPORT
config RWSEM_GENERIC_SPINLOCK
def_bool y
config GENERIC_CLOCKEVENTS
def_bool y
config RWSEM_XCHGADD_ALGORITHM
def_bool n
@ -63,8 +61,6 @@ source "kernel/Kconfig.freezer"
menu "System Type and features"
source "kernel/time/Kconfig"
config SUBARCH_AVR32B
bool
config MMU

10
arch/blackfin/Kconfig
View File

@ -38,6 +38,7 @@ config BLACKFIN
select IRQ_PER_CPU if SMP
select HAVE_NMI_WATCHDOG if NMI_WATCHDOG
select GENERIC_SMP_IDLE_THREAD
select ARCH_USES_GETTIMEOFFSET if !GENERIC_CLOCKEVENTS
config GENERIC_CSUM
def_bool y
@ -642,9 +643,10 @@ comment "Kernel Timer/Scheduler"
source kernel/Kconfig.hz
config GENERIC_CLOCKEVENTS
config SET_GENERIC_CLOCKEVENTS
bool "Generic clock events"
default y
select GENERIC_CLOCKEVENTS
menu "Clock event device"
depends on GENERIC_CLOCKEVENTS
@ -678,12 +680,6 @@ config GPTMR0_CLOCKSOURCE
depends on !TICKSOURCE_GPTMR0
endmenu
config ARCH_USES_GETTIMEOFFSET
depends on !GENERIC_CLOCKEVENTS
def_bool y
source kernel/time/Kconfig
comment "Misc"
choice

8
arch/c6x/Kconfig
View File

@ -15,6 +15,7 @@ config C6X
select IRQ_DOMAIN
select OF
select OF_EARLY_FLATTREE
select GENERIC_CLOCKEVENTS
config MMU
def_bool n
@ -31,12 +32,6 @@ config GENERIC_CALIBRATE_DELAY
config GENERIC_HWEIGHT
def_bool y
config GENERIC_CLOCKEVENTS
def_bool y
config GENERIC_CLOCKEVENTS_BROADCAST
bool
config GENERIC_BUG
def_bool y
@ -125,7 +120,6 @@ source "mm/Kconfig"
source "kernel/Kconfig.preempt"
source "kernel/Kconfig.hz"
source "kernel/time/Kconfig"
endmenu

7
arch/cris/Kconfig
View File

@ -13,12 +13,6 @@ config RWSEM_GENERIC_SPINLOCK
config RWSEM_XCHGADD_ALGORITHM
bool
config GENERIC_CMOS_UPDATE
def_bool y
config ARCH_USES_GETTIMEOFFSET
def_bool n
config ARCH_HAS_ILOG2_U32
bool
default n
@ -50,6 +44,7 @@ config CRIS
select GENERIC_IRQ_SHOW
select GENERIC_IOMAP
select GENERIC_SMP_IDLE_THREAD if ETRAX_ARCH_V32
select GENERIC_CMOS_UPDATE
config HZ
int

2
arch/h8300/Kconfig.cpu
View File

@ -1,7 +1,5 @@
menu "Processor type and features"
source "kernel/time/Kconfig"
choice
prompt "H8/300 platform"
default H8300H_GENERIC

16
arch/hexagon/Kconfig
View File

@ -27,6 +27,9 @@ config HEXAGON
select GENERIC_IOMAP
select GENERIC_SMP_IDLE_THREAD
select STACKTRACE_SUPPORT
select KTIME_SCALAR
select GENERIC_CLOCKEVENTS
select GENERIC_CLOCKEVENTS_BROADCAST
---help---
Qualcomm Hexagon is a processor architecture designed for high
performance and low power across a wide variety of applications.
@ -55,9 +58,6 @@ config PCI
config EARLY_PRINTK
def_bool y
config KTIME_SCALAR
def_bool y
config MMU
def_bool y
@ -88,15 +88,6 @@ config GENERIC_FIND_NEXT_BIT
config GENERIC_HWEIGHT
def_bool y
config GENERIC_TIME
def_bool y
config GENERIC_CLOCKEVENTS
def_bool y
config GENERIC_CLOCKEVENTS_BROADCAST
def_bool y
config STACKTRACE_SUPPORT
def_bool y
select STACKTRACE
@ -179,7 +170,6 @@ endchoice
source "mm/Kconfig"
source "kernel/Kconfig.hz"
source "kernel/time/Kconfig"
config GENERIC_GPIO
def_bool n

9
arch/ia64/Kconfig
View File

@ -37,6 +37,8 @@ config IA64
select ARCH_INIT_TASK
select ARCH_TASK_STRUCT_ALLOCATOR
select ARCH_THREAD_INFO_ALLOCATOR
select ARCH_CLOCKSOURCE_DATA
select GENERIC_TIME_VSYSCALL
default y
help
The Itanium Processor Family is Intel's 64-bit successor to
@ -92,10 +94,6 @@ config GENERIC_CALIBRATE_DELAY
bool
default y
config GENERIC_TIME_VSYSCALL
bool
default y
config HAVE_SETUP_PER_CPU_AREA
def_bool y
@ -110,9 +108,6 @@ config EFI
bool
default y
config ARCH_CLOCKSOURCE_DATA
def_bool y
config SCHED_OMIT_FRAME_POINTER
bool
default y

4
arch/m32r/Kconfig
View File

@ -11,6 +11,7 @@ config M32R
select GENERIC_IRQ_PROBE
select GENERIC_IRQ_SHOW
select GENERIC_ATOMIC64
select ARCH_USES_GETTIMEOFFSET
config SBUS
bool
@ -33,9 +34,6 @@ config HZ
int
default 100
config ARCH_USES_GETTIMEOFFSET
def_bool y
source "init/Kconfig"
source "kernel/Kconfig.freezer"

11
arch/m68k/Kconfig
View File

@ -8,6 +8,7 @@ config M68K
select ARCH_HAVE_NMI_SAFE_CMPXCHG if RMW_INSNS
select GENERIC_CPU_DEVICES
select FPU if MMU
select ARCH_USES_GETTIMEOFFSET if MMU && !COLDFIRE
config RWSEM_GENERIC_SPINLOCK
bool
@ -22,9 +23,6 @@ config ARCH_HAS_ILOG2_U32
config ARCH_HAS_ILOG2_U64
bool
config GENERIC_CLOCKEVENTS
bool
config GENERIC_GPIO
bool
@ -43,9 +41,6 @@ config TIME_LOW_RES
bool
default y
config ARCH_USES_GETTIMEOFFSET
def_bool MMU && !COLDFIRE
config NO_IOPORT
def_bool y
@ -111,10 +106,6 @@ if COLDFIRE
source "kernel/Kconfig.preempt"
endif
if !MMU || COLDFIRE
source "kernel/time/Kconfig"
endif
source "mm/Kconfig"
endmenu

9
arch/microblaze/Kconfig
View File

@ -22,6 +22,7 @@ config MICROBLAZE
select GENERIC_PCI_IOMAP
select GENERIC_CPU_DEVICES
select GENERIC_ATOMIC64
select GENERIC_CLOCKEVENTS
config SWAP
def_bool n
@ -50,12 +51,6 @@ config GENERIC_HWEIGHT
config GENERIC_CALIBRATE_DELAY
def_bool y
config GENERIC_TIME_VSYSCALL
def_bool n
config GENERIC_CLOCKEVENTS
def_bool y
config GENERIC_GPIO
def_bool y
@ -79,8 +74,6 @@ source "arch/microblaze/platform/Kconfig.platform"
menu "Processor type and features"
source "kernel/time/Kconfig"
source "kernel/Kconfig.preempt"
source "kernel/Kconfig.hz"

15
arch/mips/Kconfig
View File

@ -31,6 +31,8 @@ config MIPS
select ARCH_DISCARD_MEMBLOCK
select GENERIC_SMP_IDLE_THREAD
select BUILDTIME_EXTABLE_SORT
select GENERIC_CLOCKEVENTS
select GENERIC_CMOS_UPDATE
menu "Machine selection"
@ -858,14 +860,6 @@ config GENERIC_CALIBRATE_DELAY
bool
default y
config GENERIC_CLOCKEVENTS
bool
default y
config GENERIC_CMOS_UPDATE
bool
default y
config SCHED_OMIT_FRAME_POINTER
bool
default y
@ -2052,9 +2046,6 @@ config CPU_HAS_SYNC
depends on !CPU_R3000
default y
config GENERIC_CLOCKEVENTS_BROADCAST
bool
#
# CPU non-features
#
@ -2216,8 +2207,6 @@ config NR_CPUS
performance should round up your number of processors to the next
power of two.
source "kernel/time/Kconfig"
#
# Timer Interrupt Frequency Configuration
#

8
arch/mn10300/Kconfig
View File

@ -6,6 +6,7 @@ config MN10300
select HAVE_ARCH_TRACEHOOK
select HAVE_ARCH_KGDB
select HAVE_NMI_WATCHDOG if MN10300_WD_TIMER
select GENERIC_CLOCKEVENTS
config AM33_2
def_bool n
@ -42,15 +43,9 @@ config RWSEM_XCHGADD_ALGORITHM
config GENERIC_CALIBRATE_DELAY
def_bool y
config GENERIC_CMOS_UPDATE
def_bool n
config GENERIC_HWEIGHT
def_bool y
config GENERIC_CLOCKEVENTS
def_bool y
config GENERIC_BUG
def_bool y
@ -231,7 +226,6 @@ config MN10300_USING_JTAG
single-stepping, which are taken over completely by the JTAG unit.
source "kernel/Kconfig.hz"
source "kernel/time/Kconfig"
config MN10300_RTC
bool "Using MN10300 RTC"

5
arch/openrisc/Kconfig
View File

@ -18,6 +18,7 @@ config OPENRISC
select GENERIC_IOMAP
select GENERIC_CPU_DEVICES
select GENERIC_ATOMIC64
select GENERIC_CLOCKEVENTS
config MMU
def_bool y
@ -47,9 +48,6 @@ config NO_IOPORT
config GENERIC_GPIO
def_bool y
config GENERIC_CLOCKEVENTS
def_bool y
config TRACE_IRQFLAGS_SUPPORT
def_bool y
@ -109,7 +107,6 @@ config OPENRISC_HAVE_INST_DIV
endmenu
source "kernel/time/Kconfig"
source kernel/Kconfig.hz
source kernel/Kconfig.preempt
source "mm/Kconfig"

13
arch/powerpc/Kconfig
View File

@ -27,15 +27,6 @@ config MMU
bool
default y
config GENERIC_CMOS_UPDATE
def_bool y
config GENERIC_TIME_VSYSCALL
def_bool y
config GENERIC_CLOCKEVENTS
def_bool y
config HAVE_SETUP_PER_CPU_AREA
def_bool PPC64
@ -141,6 +132,9 @@ config PPC
select HAVE_ARCH_JUMP_LABEL
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select GENERIC_SMP_IDLE_THREAD
select GENERIC_CMOS_UPDATE
select GENERIC_TIME_VSYSCALL
select GENERIC_CLOCKEVENTS
config EARLY_PRINTK
bool
@ -281,7 +275,6 @@ config HIGHMEM
bool "High memory support"
depends on PPC32
source kernel/time/Kconfig
source kernel/Kconfig.hz
source kernel/Kconfig.preempt
source "fs/Kconfig.binfmt"

14
arch/s390/Kconfig
View File

@ -28,12 +28,6 @@ config ARCH_HAS_ILOG2_U64
config GENERIC_HWEIGHT
def_bool y
config GENERIC_TIME_VSYSCALL
def_bool y
config GENERIC_CLOCKEVENTS
def_bool y
config GENERIC_BUG
def_bool y if BUG
@ -123,6 +117,9 @@ config S390
select ARCH_INLINE_WRITE_UNLOCK_IRQ
select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
select GENERIC_SMP_IDLE_THREAD
select GENERIC_TIME_VSYSCALL
select GENERIC_CLOCKEVENTS
select KTIME_SCALAR if 32BIT
config SCHED_OMIT_FRAME_POINTER
def_bool y
@ -135,8 +132,6 @@ menu "Base setup"
comment "Processor type and features"
source "kernel/time/Kconfig"
config 64BIT
def_bool y
prompt "64 bit kernel"
@ -147,9 +142,6 @@ config 64BIT
config 32BIT
def_bool y if !64BIT
config KTIME_SCALAR
def_bool 32BIT
config SMP
def_bool y
prompt "Symmetric multi-processing support"

5
arch/score/Kconfig
View File

@ -9,6 +9,7 @@ config SCORE
select HAVE_MEMBLOCK_NODE_MAP
select ARCH_DISCARD_MEMBLOCK
select GENERIC_CPU_DEVICES
select GENERIC_CLOCKEVENTS
choice
prompt "System type"
@ -51,9 +52,6 @@ config GENERIC_HWEIGHT
config GENERIC_CALIBRATE_DELAY
def_bool y
config GENERIC_CLOCKEVENTS
def_bool y
menu "Kernel type"
config 32BIT
@ -68,7 +66,6 @@ config MEMORY_START
hex
default 0xa0000000
source "kernel/time/Kconfig"
source "kernel/Kconfig.hz"
source "kernel/Kconfig.preempt"

14
arch/sh/Kconfig
View File

@ -29,6 +29,8 @@ config SUPERH
select GENERIC_ATOMIC64
select GENERIC_IRQ_SHOW
select GENERIC_SMP_IDLE_THREAD
select GENERIC_CLOCKEVENTS
select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST
help
The SuperH is a RISC processor targeted for use in embedded systems
and consumer electronics; it was also used in the Sega Dreamcast
@ -87,16 +89,6 @@ config GENERIC_GPIO
config GENERIC_CALIBRATE_DELAY
bool
config GENERIC_CLOCKEVENTS
def_bool y
config GENERIC_CLOCKEVENTS_BROADCAST
bool
config GENERIC_CMOS_UPDATE
def_bool y
depends on SH_SH03 || SH_DREAMCAST
config GENERIC_LOCKBREAK
def_bool y
depends on SMP && PREEMPT
@ -611,8 +603,6 @@ config SH_CLK_CPG_LEGACY
!CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
!CPU_SUBTYPE_SH7269
source "kernel/time/Kconfig"
endmenu
menu "CPU Frequency scaling"

12
arch/sparc/Kconfig
View File

@ -32,12 +32,15 @@ config SPARC
select HAVE_NMI_WATCHDOG if SPARC64
select HAVE_BPF_JIT
select GENERIC_SMP_IDLE_THREAD
select GENERIC_CMOS_UPDATE
select GENERIC_CLOCKEVENTS
config SPARC32
def_bool !64BIT
select GENERIC_ATOMIC64
select CLZ_TAB
select ARCH_THREAD_INFO_ALLOCATOR
select ARCH_USES_GETTIMEOFFSET
config SPARC64
def_bool 64BIT
@ -77,13 +80,6 @@ config BITS
default 32 if SPARC32
default 64 if SPARC64
config GENERIC_CMOS_UPDATE
bool
default y
config GENERIC_CLOCKEVENTS
def_bool y
config IOMMU_HELPER
bool
default y if SPARC64
@ -274,8 +270,6 @@ config HOTPLUG_CPU
can be controlled through /sys/devices/system/cpu/cpu#.
Say N if you want to disable CPU hotplug.
source "kernel/time/Kconfig"
if SPARC64
source "drivers/cpufreq/Kconfig"

6
arch/tile/Kconfig
View File

@ -14,6 +14,7 @@ config TILE
select HAVE_SYSCALL_WRAPPERS if TILEGX
select SYS_HYPERVISOR
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select GENERIC_CLOCKEVENTS
# FIXME: investigate whether we need/want these options.
# select HAVE_IOREMAP_PROT
@ -47,9 +48,6 @@ config NEED_PER_CPU_PAGE_FIRST_CHUNK
config SYS_SUPPORTS_HUGETLBFS
def_bool y
config GENERIC_CLOCKEVENTS
def_bool y
# FIXME: tilegx can implement a more efficient rwsem.
config RWSEM_GENERIC_SPINLOCK
def_bool y
@ -139,8 +137,6 @@ config NR_CPUS
smaller kernel memory footprint results from using a smaller
value on chips with fewer tiles.
source "kernel/time/Kconfig"
source "kernel/Kconfig.hz"
config KEXEC

5
arch/um/Kconfig.common
View File

@ -10,6 +10,7 @@ config UML
select GENERIC_IRQ_SHOW
select GENERIC_CPU_DEVICES
select GENERIC_IO
select GENERIC_CLOCKEVENTS
config MMU
bool
@ -52,10 +53,6 @@ config GENERIC_BUG
default y
depends on BUG
config GENERIC_CLOCKEVENTS
bool
default y
config HZ
int
default 100

1
arch/um/Kconfig.um
View File

@ -10,7 +10,6 @@ config STATIC_LINK
2.75G) for UML.
source "mm/Kconfig"
source "kernel/time/Kconfig"
config LD_SCRIPT_STATIC
bool

5
arch/unicore32/Kconfig
View File

@ -25,9 +25,6 @@ config HAVE_PWM
config GENERIC_GPIO
def_bool y
config GENERIC_CLOCKEVENTS
bool
config GENERIC_CSUM
def_bool y
@ -146,8 +143,6 @@ endmenu
menu "Kernel Features"
source "kernel/time/Kconfig"
source "kernel/Kconfig.preempt"
source "kernel/Kconfig.hz"

33
arch/x86/Kconfig
View File

@ -85,6 +85,13 @@ config X86
select GENERIC_SMP_IDLE_THREAD
select HAVE_ARCH_SECCOMP_FILTER
select BUILDTIME_EXTABLE_SORT
select GENERIC_CMOS_UPDATE
select CLOCKSOURCE_WATCHDOG
select GENERIC_CLOCKEVENTS
select ARCH_CLOCKSOURCE_DATA if X86_64
select GENERIC_CLOCKEVENTS_BROADCAST if X86_64 || (X86_32 && X86_LOCAL_APIC)
select GENERIC_TIME_VSYSCALL if X86_64
select KTIME_SCALAR if X86_32
config INSTRUCTION_DECODER
def_bool (KPROBES || PERF_EVENTS || UPROBES)
@ -99,23 +106,6 @@ config ARCH_DEFCONFIG
default "arch/x86/configs/i386_defconfig" if X86_32
default "arch/x86/configs/x86_64_defconfig" if X86_64
config GENERIC_CMOS_UPDATE
def_bool y
config CLOCKSOURCE_WATCHDOG
def_bool y
config GENERIC_CLOCKEVENTS
def_bool y
config ARCH_CLOCKSOURCE_DATA
def_bool y
depends on X86_64
config GENERIC_CLOCKEVENTS_BROADCAST
def_bool y
depends on X86_64 || (X86_32 && X86_LOCAL_APIC)
config LOCKDEP_SUPPORT
def_bool y
@ -166,10 +156,6 @@ config RWSEM_XCHGADD_ALGORITHM
config GENERIC_CALIBRATE_DELAY
def_bool y
config GENERIC_TIME_VSYSCALL
bool
default X86_64
config ARCH_HAS_CPU_RELAX
def_bool y
@ -236,9 +222,6 @@ config ARCH_HWEIGHT_CFLAGS
default "-fcall-saved-ecx -fcall-saved-edx" if X86_32
default "-fcall-saved-rdi -fcall-saved-rsi -fcall-saved-rdx -fcall-saved-rcx -fcall-saved-r8 -fcall-saved-r9 -fcall-saved-r10 -fcall-saved-r11" if X86_64
config KTIME_SCALAR
def_bool X86_32
config ARCH_CPU_PROBE_RELEASE
def_bool y
depends on HOTPLUG_CPU
@ -261,8 +244,6 @@ config ZONE_DMA
If unsure, say Y.
source "kernel/time/Kconfig"
config SMP
bool "Symmetric multi-processing support"
---help---

66
arch/x86/kernel/hpet.c
View File

@ -94,13 +94,18 @@ static int hpet_verbose;
static int __init hpet_setup(char *str)
{
if (str) {
while (str) {
char *next = strchr(str, ',');
if (next)
*next++ = 0;
if (!strncmp("disable", str, 7))
boot_hpet_disable = 1;
if (!strncmp("force", str, 5))
hpet_force_user = 1;
if (!strncmp("verbose", str, 7))
hpet_verbose = 1;
str = next;
}
return 1;
}
@ -319,8 +324,6 @@ static void hpet_set_mode(enum clock_event_mode mode,
now = hpet_readl(HPET_COUNTER);
cmp = now + (unsigned int) delta;
cfg = hpet_readl(HPET_Tn_CFG(timer));
/* Make sure we use edge triggered interrupts */
cfg &= ~HPET_TN_LEVEL;
cfg |= HPET_TN_ENABLE | HPET_TN_PERIODIC |
HPET_TN_SETVAL | HPET_TN_32BIT;
hpet_writel(cfg, HPET_Tn_CFG(timer));
@ -787,15 +790,16 @@ static int hpet_clocksource_register(void)
return 0;
}
static u32 *hpet_boot_cfg;
/**
* hpet_enable - Try to setup the HPET timer. Returns 1 on success.
*/
int __init hpet_enable(void)
{
unsigned long hpet_period;
unsigned int id;
u32 hpet_period, cfg, id;
u64 freq;
int i;
unsigned int i, last;
if (!is_hpet_capable())
return 0;
@ -847,15 +851,45 @@ int __init hpet_enable(void)
id = hpet_readl(HPET_ID);
hpet_print_config();
last = (id & HPET_ID_NUMBER) >> HPET_ID_NUMBER_SHIFT;
#ifdef CONFIG_HPET_EMULATE_RTC
/*
* The legacy routing mode needs at least two channels, tick timer
* and the rtc emulation channel.
*/
if (!(id & HPET_ID_NUMBER))
if (!last)
goto out_nohpet;
#endif
cfg = hpet_readl(HPET_CFG);
hpet_boot_cfg = kmalloc((last + 2) * sizeof(*hpet_boot_cfg),
GFP_KERNEL);
if (hpet_boot_cfg)
*hpet_boot_cfg = cfg;
else
pr_warn("HPET initial state will not be saved\n");
cfg &= ~(HPET_CFG_ENABLE | HPET_CFG_LEGACY);
hpet_writel(cfg, HPET_Tn_CFG(i));
if (cfg)
pr_warn("HPET: Unrecognized bits %#x set in global cfg\n",
cfg);
for (i = 0; i <= last; ++i) {
cfg = hpet_readl(HPET_Tn_CFG(i));
if (hpet_boot_cfg)
hpet_boot_cfg[i + 1] = cfg;
cfg &= ~(HPET_TN_ENABLE | HPET_TN_LEVEL | HPET_TN_FSB);
hpet_writel(cfg, HPET_Tn_CFG(i));
cfg &= ~(HPET_TN_PERIODIC | HPET_TN_PERIODIC_CAP
| HPET_TN_64BIT_CAP | HPET_TN_32BIT | HPET_TN_ROUTE
| HPET_TN_FSB | HPET_TN_FSB_CAP);
if (cfg)
pr_warn("HPET: Unrecognized bits %#x set in cfg#%u\n",
cfg, i);
}
hpet_print_config();
if (hpet_clocksource_register())
goto out_nohpet;
@ -923,14 +957,28 @@ fs_initcall(hpet_late_init);
void hpet_disable(void)
{
if (is_hpet_capable() && hpet_virt_address) {
unsigned int cfg = hpet_readl(HPET_CFG);
unsigned int cfg = hpet_readl(HPET_CFG), id, last;
if (hpet_legacy_int_enabled) {
if (hpet_boot_cfg)
cfg = *hpet_boot_cfg;
else if (hpet_legacy_int_enabled) {
cfg &= ~HPET_CFG_LEGACY;
hpet_legacy_int_enabled = 0;
}
cfg &= ~HPET_CFG_ENABLE;
hpet_writel(cfg, HPET_CFG);
if (!hpet_boot_cfg)
return;
id = hpet_readl(HPET_ID);
last = ((id & HPET_ID_NUMBER) >> HPET_ID_NUMBER_SHIFT);
for (id = 0; id <= last; ++id)
hpet_writel(hpet_boot_cfg[id + 1], HPET_Tn_CFG(id));
if (*hpet_boot_cfg & HPET_CFG_ENABLE)
hpet_writel(*hpet_boot_cfg, HPET_CFG);
}
}

1
include/linux/time.h
View File

@ -167,7 +167,6 @@ extern void get_monotonic_boottime(struct timespec *ts);
extern struct timespec timespec_trunc(struct timespec t, unsigned gran);
extern int timekeeping_valid_for_hres(void);
extern u64 timekeeping_max_deferment(void);
extern void timekeeping_leap_insert(int leapsecond);
extern int timekeeping_inject_offset(struct timespec *ts);
struct tms;

1
init/Kconfig
View File

@ -390,6 +390,7 @@ config AUDIT_LOGINUID_IMMUTABLE
but may not be backwards compatible with older init systems.
source "kernel/irq/Kconfig"
source "kernel/time/Kconfig"
menu "RCU Subsystem"

58
kernel/time/Kconfig
View File

@ -2,6 +2,55 @@
# Timer subsystem related configuration options
#
# Options selectable by arch Kconfig
# Watchdog function for clocksources to detect instabilities
config CLOCKSOURCE_WATCHDOG
bool
# Architecture has extra clocksource data
config ARCH_CLOCKSOURCE_DATA
bool
# Timekeeping vsyscall support
config GENERIC_TIME_VSYSCALL
bool
# ktime_t scalar 64bit nsec representation
config KTIME_SCALAR
bool
# Old style timekeeping
config ARCH_USES_GETTIMEOFFSET
bool
# The generic clock events infrastructure
config GENERIC_CLOCKEVENTS
bool
# Migration helper. Builds, but does not invoke
config GENERIC_CLOCKEVENTS_BUILD
bool
default y
depends on GENERIC_CLOCKEVENTS
# Clockevents broadcasting infrastructure
config GENERIC_CLOCKEVENTS_BROADCAST
bool
depends on GENERIC_CLOCKEVENTS
# Automatically adjust the min. reprogramming time for
# clock event device
config GENERIC_CLOCKEVENTS_MIN_ADJUST
bool
# Generic update of CMOS clock
config GENERIC_CMOS_UPDATE
bool
if GENERIC_CLOCKEVENTS
menu "Timers subsystem"
# Core internal switch. Selected by NO_HZ / HIGH_RES_TIMERS. This is
# only related to the tick functionality. Oneshot clockevent devices
# are supported independ of this.
@ -26,10 +75,5 @@ config HIGH_RES_TIMERS
hardware is not capable then this option only increases
the size of the kernel image.
config GENERIC_CLOCKEVENTS_BUILD
bool
default y
depends on GENERIC_CLOCKEVENTS
config GENERIC_CLOCKEVENTS_MIN_ADJUST
bool
endmenu
endif

8
kernel/time/ntp.c
View File

@ -412,6 +412,7 @@ int second_overflow(unsigned long secs)
if (secs % 86400 == 0) {
leap = -1;
time_state = TIME_OOP;
time_tai++;
printk(KERN_NOTICE
"Clock: inserting leap second 23:59:60 UTC\n");
}
@ -426,7 +427,6 @@ int second_overflow(unsigned long secs)
}
break;
case TIME_OOP:
time_tai++;
time_state = TIME_WAIT;
break;
@ -473,8 +473,6 @@ int second_overflow(unsigned long secs)
<< NTP_SCALE_SHIFT;
time_adjust = 0;
out:
spin_unlock_irqrestore(&ntp_lock, flags);
@ -559,10 +557,10 @@ static inline void process_adj_status(struct timex *txc, struct timespec *ts)
/* only set allowed bits */
time_status &= STA_RONLY;
time_status |= txc->status & ~STA_RONLY;
}
/*
* Called with the xtime lock held, so we can access and modify
* Called with ntp_lock held, so we can access and modify
* all the global NTP state:
*/
static inline void process_adjtimex_modes(struct timex *txc, struct timespec *ts)

4
kernel/time/timekeeping.c
View File

@ -240,7 +240,6 @@ void getnstimeofday(struct timespec *ts)
timespec_add_ns(ts, nsecs);
}
EXPORT_SYMBOL(getnstimeofday);
ktime_t ktime_get(void)
@ -357,8 +356,8 @@ void do_gettimeofday(struct timeval *tv)
tv->tv_sec = now.tv_sec;
tv->tv_usec = now.tv_nsec/1000;
}
EXPORT_SYMBOL(do_gettimeofday);
/**
* do_settimeofday - Sets the time of day
* @tv: pointer to the timespec variable containing the new time
@ -392,7 +391,6 @@ int do_settimeofday(const struct timespec *tv)
return 0;
}
EXPORT_SYMBOL(do_settimeofday);