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Merge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

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* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  time: Fix accumulation bug triggered by long delay.
  posix-cpu-timers: Reset expire cache when no timer is running
  timer stats: Fix del_timer_sync() and try_to_del_timer_sync()
  clockevents: Sanitize min_delta_ns adjustment and prevent overflows
This commit is contained in:
Linus Torvalds 2010-03-26 15:10:38 -07:00
commit 054319b5e2
6 changed files with 54 additions and 17 deletions
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10
kernel/posix-cpu-timers.c
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@ -1061,9 +1061,9 @@ static void check_thread_timers(struct task_struct *tsk,
}
}
static void stop_process_timers(struct task_struct *tsk)
static void stop_process_timers(struct signal_struct *sig)
{
struct thread_group_cputimer *cputimer = &tsk->signal->cputimer;
struct thread_group_cputimer *cputimer = &sig->cputimer;
unsigned long flags;
if (!cputimer->running)
@ -1072,6 +1072,10 @@ static void stop_process_timers(struct task_struct *tsk)
spin_lock_irqsave(&cputimer->lock, flags);
cputimer->running = 0;
spin_unlock_irqrestore(&cputimer->lock, flags);
sig->cputime_expires.prof_exp = cputime_zero;
sig->cputime_expires.virt_exp = cputime_zero;
sig->cputime_expires.sched_exp = 0;
}
static u32 onecputick;
@ -1133,7 +1137,7 @@ static void check_process_timers(struct task_struct *tsk,
list_empty(&timers[CPUCLOCK_VIRT]) &&
cputime_eq(sig->it[CPUCLOCK_VIRT].expires, cputime_zero) &&
list_empty(&timers[CPUCLOCK_SCHED])) {
stop_process_timers(tsk);
stop_process_timers(sig);
return;
}