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

* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, tsc: Skip TSC synchronization checks for tsc=reliable
  clocksource: Convert tcb_clksrc to use clocksource_register_hz/khz
  clocksource: cris: Convert to clocksource_register_khz
  clocksource: xtensa: Convert to clocksource_register_hz/khz
  clocksource: um: Convert to clocksource_register_hz/khz
  clocksource: parisc: Convert to clocksource_register_hz/khz
  clocksource: m86k: Convert to clocksource_register_hz/khz
  time: x86: Replace LATCH with PIT_LATCH in i8253 clocksource driver
  time: x86: Remove CLOCK_TICK_RATE from acpi_pm clocksource driver
  time: x86: Remove CLOCK_TICK_RATE from mach_timer.h
  time: x86: Remove CLOCK_TICK_RATE from tsc code
  time: Fix spelling mistakes in new comments
  time: fix bogus comment in timekeeping_get_ns_raw
This commit is contained in:
Linus Torvalds 2012-01-06 13:57:44 -08:00
parent 0db49b72bc 0518469d0a
commit 376613e81d
17 changed files with 28 additions and 58 deletions
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4
arch/cris/arch-v32/kernel/time.c
View File

@ -47,14 +47,12 @@ static struct clocksource cont_rotime = {
.rating = 300,
.read = read_cont_rotime,
.mask = CLOCKSOURCE_MASK(32),
.shift = 10,
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
static int __init etrax_init_cont_rotime(void)
{
cont_rotime.mult = clocksource_khz2mult(100000, cont_rotime.shift);
clocksource_register(&cont_rotime);
clocksource_register_khz(&cont_rotime, 100000);
return 0;
}
arch_initcall(etrax_init_cont_rotime);

4
arch/m68k/platform/68328/timers.c
View File

@ -93,7 +93,6 @@ static struct clocksource m68328_clk = {
.name = "timer",
.rating = 250,
.read = m68328_read_clk,
.shift = 20,
.mask = CLOCKSOURCE_MASK(32),
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
@ -115,8 +114,7 @@ void hw_timer_init(void)
/* Enable timer 1 */
TCTL |= TCTL_TEN;
m68328_clk.mult = clocksource_hz2mult(TICKS_PER_JIFFY*HZ, m68328_clk.shift);
clocksource_register(&m68328_clk);
clocksource_register_hz(&m68328_clk, TICKS_PER_JIFFY*HZ);
}
/***************************************************************************/

5
arch/m68k/platform/coldfire/dma_timer.c
View File

@ -44,7 +44,6 @@ static struct clocksource clocksource_cf_dt = {
.rating = 200,
.read = cf_dt_get_cycles,
.mask = CLOCKSOURCE_MASK(32),
.shift = 20,
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
@ -60,9 +59,7 @@ static int __init init_cf_dt_clocksource(void)
__raw_writeb(0x00, DTER0);
__raw_writel(0x00000000, DTRR0);
__raw_writew(DMA_DTMR_CLK_DIV_16 | DMA_DTMR_ENABLE, DTMR0);
clocksource_cf_dt.mult = clocksource_hz2mult(DMA_FREQ,
clocksource_cf_dt.shift);
return clocksource_register(&clocksource_cf_dt);
return clocksource_register_hz(&clocksource_cf_dt, DMA_FREQ);
}
arch_initcall(init_cf_dt_clocksource);

4
arch/m68k/platform/coldfire/pit.c
View File

@ -144,7 +144,6 @@ static struct clocksource pit_clk = {
.name = "pit",
.rating = 100,
.read = pit_read_clk,
.shift = 20,
.mask = CLOCKSOURCE_MASK(32),
};
@ -162,8 +161,7 @@ void hw_timer_init(void)
setup_irq(MCFINT_VECBASE + MCFINT_PIT1, &pit_irq);
pit_clk.mult = clocksource_hz2mult(FREQ, pit_clk.shift);
clocksource_register(&pit_clk);
clocksource_register_hz(&pit_clk, FREQ);
}
/***************************************************************************/

4
arch/m68k/platform/coldfire/sltimers.c
View File

@ -114,7 +114,6 @@ static struct clocksource mcfslt_clk = {
.name = "slt",
.rating = 250,
.read = mcfslt_read_clk,
.shift = 20,
.mask = CLOCKSOURCE_MASK(32),
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
@ -136,8 +135,7 @@ void hw_timer_init(void)
setup_irq(MCF_IRQ_TIMER, &mcfslt_timer_irq);
mcfslt_clk.mult = clocksource_hz2mult(MCF_BUSCLK, mcfslt_clk.shift);
clocksource_register(&mcfslt_clk);
clocksource_register_hz(&mcfslt_clk, MCF_BUSCLK);
#ifdef CONFIG_HIGHPROFILE
mcfslt_profile_init();

4
arch/m68k/platform/coldfire/timers.c
View File

@ -88,7 +88,6 @@ static struct clocksource mcftmr_clk = {
.name = "tmr",
.rating = 250,
.read = mcftmr_read_clk,
.shift = 20,
.mask = CLOCKSOURCE_MASK(32),
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
@ -109,8 +108,7 @@ void hw_timer_init(void)
__raw_writew(MCFTIMER_TMR_ENORI | MCFTIMER_TMR_CLK16 |
MCFTIMER_TMR_RESTART | MCFTIMER_TMR_ENABLE, TA(MCFTIMER_TMR));
mcftmr_clk.mult = clocksource_hz2mult(FREQ, mcftmr_clk.shift);
clocksource_register(&mcftmr_clk);
clocksource_register_hz(&mcftmr_clk, FREQ);
setup_irq(MCF_IRQ_TIMER, &mcftmr_timer_irq);

6
arch/parisc/kernel/time.c
View File

@ -198,8 +198,6 @@ static struct clocksource clocksource_cr16 = {
.rating = 300,
.read = read_cr16,
.mask = CLOCKSOURCE_MASK(BITS_PER_LONG),
.mult = 0, /* to be set */
.shift = 22,
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
@ -270,7 +268,5 @@ void __init time_init(void)
/* register at clocksource framework */
current_cr16_khz = PAGE0->mem_10msec/10; /* kHz */
clocksource_cr16.mult = clocksource_khz2mult(current_cr16_khz,
clocksource_cr16.shift);
clocksource_register(&clocksource_cr16);
clocksource_register_khz(&clocksource_cr16, current_cr16_khz);
}

6
arch/um/kernel/time.c
View File

@ -75,8 +75,6 @@ static struct clocksource itimer_clocksource = {
.rating = 300,
.read = itimer_read,
.mask = CLOCKSOURCE_MASK(64),
.mult = 1000,
.shift = 0,
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
@ -94,9 +92,9 @@ static void __init setup_itimer(void)
clockevent_delta2ns(60 * HZ, &itimer_clockevent);
itimer_clockevent.min_delta_ns =
clockevent_delta2ns(1, &itimer_clockevent);
err = clocksource_register(&itimer_clocksource);
err = clocksource_register_hz(&itimer_clocksource, USEC_PER_SEC);
if (err) {
printk(KERN_ERR "clocksource_register returned %d\n", err);
printk(KERN_ERR "clocksource_register_hz returned %d\n", err);
return;
}
clockevents_register_device(&itimer_clockevent);

2
arch/x86/include/asm/mach_timer.h
View File

@ -15,7 +15,7 @@
#define CALIBRATE_TIME_MSEC 30 /* 30 msecs */
#define CALIBRATE_LATCH \
((CLOCK_TICK_RATE * CALIBRATE_TIME_MSEC + 1000/2)/1000)
((PIT_TICK_RATE * CALIBRATE_TIME_MSEC + 1000/2)/1000)
static inline void mach_prepare_counter(void)
{

2
arch/x86/include/asm/tsc.h
View File

@ -51,6 +51,8 @@ extern int unsynchronized_tsc(void);
extern int check_tsc_unstable(void);
extern unsigned long native_calibrate_tsc(void);
extern int tsc_clocksource_reliable;
/*
* Boot-time check whether the TSCs are synchronized across
* all CPUs/cores:

6
arch/x86/kernel/tsc.c
View File

@ -35,7 +35,7 @@ static int __read_mostly tsc_unstable;
erroneous rdtsc usage on !cpu_has_tsc processors */
static int __read_mostly tsc_disabled = -1;
static int tsc_clocksource_reliable;
int tsc_clocksource_reliable;
/*
* Scheduler clock - returns current time in nanosec units.
*/
@ -178,11 +178,11 @@ static unsigned long calc_pmtimer_ref(u64 deltatsc, u64 pm1, u64 pm2)
}
#define CAL_MS 10
#define CAL_LATCH (CLOCK_TICK_RATE / (1000 / CAL_MS))
#define CAL_LATCH (PIT_TICK_RATE / (1000 / CAL_MS))
#define CAL_PIT_LOOPS 1000
#define CAL2_MS 50
#define CAL2_LATCH (CLOCK_TICK_RATE / (1000 / CAL2_MS))
#define CAL2_LATCH (PIT_TICK_RATE / (1000 / CAL2_MS))
#define CAL2_PIT_LOOPS 5000

4
arch/x86/kernel/tsc_sync.c
View File

@ -113,7 +113,7 @@ void __cpuinit check_tsc_sync_source(int cpu)
if (unsynchronized_tsc())
return;
if (boot_cpu_has(X86_FEATURE_TSC_RELIABLE)) {
if (tsc_clocksource_reliable) {
if (cpu == (nr_cpu_ids-1) || system_state != SYSTEM_BOOTING)
pr_info(
"Skipped synchronization checks as TSC is reliable.\n");
@ -172,7 +172,7 @@ void __cpuinit check_tsc_sync_target(void)
{
int cpus = 2;
if (unsynchronized_tsc() || boot_cpu_has(X86_FEATURE_TSC_RELIABLE))
if (unsynchronized_tsc() || tsc_clocksource_reliable)
return;
/*

13
arch/xtensa/kernel/time.c
View File

@ -41,14 +41,6 @@ static struct clocksource ccount_clocksource = {
.rating = 200,
.read = ccount_read,
.mask = CLOCKSOURCE_MASK(32),
/*
* With a shift of 22 the lower limit of the cpu clock is
* 1MHz, where NSEC_PER_CCOUNT is 1000 or a bit less than
* 2^10: Since we have 32 bits and the multiplicator can
* already take up as much as 10 bits, this leaves us with
* remaining upper 22 bits.
*/
.shift = 22,
};
static irqreturn_t timer_interrupt(int irq, void *dev_id);
@ -66,10 +58,7 @@ void __init time_init(void)
printk("%d.%02d MHz\n", (int)ccount_per_jiffy/(1000000/HZ),
(int)(ccount_per_jiffy/(10000/HZ))%100);
#endif
ccount_clocksource.mult =
clocksource_hz2mult(CCOUNT_PER_JIFFY * HZ,
ccount_clocksource.shift);
clocksource_register(&ccount_clocksource);
clocksource_register_hz(&ccount_clocksource, CCOUNT_PER_JIFFY * HZ);
/* Initialize the linux timer interrupt. */

2
drivers/clocksource/acpi_pm.c
View File

@ -143,7 +143,7 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_LE,
#ifndef CONFIG_X86_64
#include <asm/mach_timer.h>
#define PMTMR_EXPECTED_RATE \
((CALIBRATE_LATCH * (PMTMR_TICKS_PER_SEC >> 10)) / (CLOCK_TICK_RATE>>10))
((CALIBRATE_LATCH * (PMTMR_TICKS_PER_SEC >> 10)) / (PIT_TICK_RATE>>10))
/*
* Some boards have the PMTMR running way too fast. We check
* the PMTMR rate against PIT channel 2 to catch these cases.

6
drivers/clocksource/i8253.c
View File

@ -53,7 +53,7 @@ static cycle_t i8253_read(struct clocksource *cs)
count |= inb_p(PIT_CH0) << 8;
/* VIA686a test code... reset the latch if count > max + 1 */
if (count > LATCH) {
if (count > PIT_LATCH) {
outb_p(0x34, PIT_MODE);
outb_p(PIT_LATCH & 0xff, PIT_CH0);
outb_p(PIT_LATCH >> 8, PIT_CH0);
@ -114,8 +114,8 @@ static void init_pit_timer(enum clock_event_mode mode,
case CLOCK_EVT_MODE_PERIODIC:
/* binary, mode 2, LSB/MSB, ch 0 */
outb_p(0x34, PIT_MODE);
outb_p(LATCH & 0xff , PIT_CH0); /* LSB */
outb_p(LATCH >> 8 , PIT_CH0); /* MSB */
outb_p(PIT_LATCH & 0xff , PIT_CH0); /* LSB */
outb_p(PIT_LATCH >> 8 , PIT_CH0); /* MSB */
break;
case CLOCK_EVT_MODE_SHUTDOWN:

4
drivers/clocksource/tcb_clksrc.c
View File

@ -59,7 +59,6 @@ static struct clocksource clksrc = {
.rating = 200,
.read = tc_get_cycles,
.mask = CLOCKSOURCE_MASK(32),
.shift = 18,
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
@ -256,7 +255,6 @@ static int __init tcb_clksrc_init(void)
best_divisor_idx = i;
}
clksrc.mult = clocksource_hz2mult(divided_rate, clksrc.shift);
printk(bootinfo, clksrc.name, CONFIG_ATMEL_TCB_CLKSRC_BLOCK,
divided_rate / 1000000,
@ -292,7 +290,7 @@ static int __init tcb_clksrc_init(void)
__raw_writel(ATMEL_TC_SYNC, tcaddr + ATMEL_TC_BCR);
/* and away we go! */
clocksource_register(&clksrc);
clocksource_register_hz(&clksrc, divided_rate);
/* channel 2: periodic and oneshot timer support */
setup_clkevents(tc, clk32k_divisor_idx);

10
kernel/time/timekeeping.c
View File

@ -131,7 +131,7 @@ static inline s64 timekeeping_get_ns_raw(void)
/* calculate the delta since the last update_wall_time: */
cycle_delta = (cycle_now - clock->cycle_last) & clock->mask;
/* return delta convert to nanoseconds using ntp adjusted mult. */
/* return delta convert to nanoseconds. */
return clocksource_cyc2ns(cycle_delta, clock->mult, clock->shift);
}
@ -813,11 +813,11 @@ static void timekeeping_adjust(s64 offset)
* First we shift it down from NTP_SHIFT to clocksource->shifted nsecs.
*
* Note we subtract one in the shift, so that error is really error*2.
* This "saves" dividing(shifting) intererval twice, but keeps the
* (error > interval) comparision as still measuring if error is
* This "saves" dividing(shifting) interval twice, but keeps the
* (error > interval) comparison as still measuring if error is
* larger then half an interval.
*
* Note: It does not "save" on aggrivation when reading the code.
* Note: It does not "save" on aggravation when reading the code.
*/
error = timekeeper.ntp_error >> (timekeeper.ntp_error_shift - 1);
if (error > interval) {
@ -833,7 +833,7 @@ static void timekeeping_adjust(s64 offset)
* nanosecond, and store the amount rounded up into
* the error. This causes the likely below to be unlikely.
*
* The properfix is to avoid rounding up by using
* The proper fix is to avoid rounding up by using
* the high precision timekeeper.xtime_nsec instead of
* xtime.tv_nsec everywhere. Fixing this will take some
* time.