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Merge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86 

* git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86:
  ACPI: move timer broadcast before busmaster disable
  clockevents: warn once when program_event() is called with negative expiry
  hrtimers: avoid overflow for large relative timeouts
This commit is contained in:
Linus Torvalds 2007-12-07 11:01:26 -08:00
parent fa2dd441df e17bcb43a2
commit 2c5ea0f2d8
3 changed files with 27 additions and 5 deletions
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19
drivers/acpi/processor_idle.c
View File

@ -530,6 +530,11 @@ static void acpi_processor_idle(void)
break; break;
case ACPI_STATE_C3: case ACPI_STATE_C3:
/*
* Must be done before busmaster disable as we might
* need to access HPET !
*/
acpi_state_timer_broadcast(pr, cx, 1);
/* /*
* disable bus master * disable bus master
* bm_check implies we need ARB_DIS * bm_check implies we need ARB_DIS
@ -557,7 +562,6 @@ static void acpi_processor_idle(void)
/* Get start time (ticks) */ /* Get start time (ticks) */
t1 = inl(acpi_gbl_FADT.xpm_timer_block.address); t1 = inl(acpi_gbl_FADT.xpm_timer_block.address);
/* Invoke C3 */ /* Invoke C3 */
acpi_state_timer_broadcast(pr, cx, 1);
/* Tell the scheduler that we are going deep-idle: */ /* Tell the scheduler that we are going deep-idle: */
sched_clock_idle_sleep_event(); sched_clock_idle_sleep_event();
acpi_cstate_enter(cx); acpi_cstate_enter(cx);
@ -1401,9 +1405,6 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
if (acpi_idle_suspend) if (acpi_idle_suspend)
return(acpi_idle_enter_c1(dev, state)); return(acpi_idle_enter_c1(dev, state));
if (pr->flags.bm_check)
acpi_idle_update_bm_rld(pr, cx);
local_irq_disable(); local_irq_disable();
current_thread_info()->status &= ~TS_POLLING; current_thread_info()->status &= ~TS_POLLING;
/* /*
@ -1418,13 +1419,21 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
return 0; return 0;
} }
/*
* Must be done before busmaster disable as we might need to
* access HPET !
*/
acpi_state_timer_broadcast(pr, cx, 1);
if (pr->flags.bm_check)
acpi_idle_update_bm_rld(pr, cx);
if (cx->type == ACPI_STATE_C3) if (cx->type == ACPI_STATE_C3)
ACPI_FLUSH_CPU_CACHE(); ACPI_FLUSH_CPU_CACHE();
t1 = inl(acpi_gbl_FADT.xpm_timer_block.address); t1 = inl(acpi_gbl_FADT.xpm_timer_block.address);
/* Tell the scheduler that we are going deep-idle: */ /* Tell the scheduler that we are going deep-idle: */
sched_clock_idle_sleep_event(); sched_clock_idle_sleep_event();
acpi_state_timer_broadcast(pr, cx, 1);
acpi_idle_do_entry(cx); acpi_idle_do_entry(cx);
t2 = inl(acpi_gbl_FADT.xpm_timer_block.address); t2 = inl(acpi_gbl_FADT.xpm_timer_block.address);

8
kernel/hrtimer.c
View File

@ -850,6 +850,14 @@ hrtimer_start(struct hrtimer *timer, ktime_t tim, const enum hrtimer_mode mode)
#ifdef CONFIG_TIME_LOW_RES #ifdef CONFIG_TIME_LOW_RES
tim = ktime_add(tim, base->resolution); tim = ktime_add(tim, base->resolution);
#endif #endif
/*
* Careful here: User space might have asked for a
* very long sleep, so the add above might result in a
* negative number, which enqueues the timer in front
* of the queue.
*/
if (tim.tv64 < 0)
tim.tv64 = KTIME_MAX;
} }
timer->expires = tim; timer->expires = tim;

5
kernel/time/clockevents.c
View File

@ -78,6 +78,11 @@ int clockevents_program_event(struct clock_event_device *dev, ktime_t expires,
unsigned long long clc; unsigned long long clc;
int64_t delta; int64_t delta;
if (unlikely(expires.tv64 < 0)) {
WARN_ON_ONCE(1);
return -ETIME;
}
delta = ktime_to_ns(ktime_sub(expires, now)); delta = ktime_to_ns(ktime_sub(expires, now));
if (delta <= 0) if (delta <= 0)