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[PATCH] posix-cpu-timers: fix overrun reporting

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This change corrects an omission in posix_cpu_timer_schedule, so that it
correctly propagates the overrun calculation to where it will get reported
to the user.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Roland McGrath 2005-10-30 15:03:13 -08:00 committed by Linus Torvalds
parent a241ec65ae
commit 708f430dcc
1 changed files with 10 additions and 6 deletions
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16
kernel/posix-cpu-timers.c
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@ -1225,7 +1225,7 @@ void posix_cpu_timer_schedule(struct k_itimer *timer)
/*
* The task was cleaned up already, no future firings.
*/
return;
goto out;
/*
* Fetch the current sample and update the timer's expiry time.
@ -1235,7 +1235,7 @@ void posix_cpu_timer_schedule(struct k_itimer *timer)
bump_cpu_timer(timer, now);
if (unlikely(p->exit_state)) {
clear_dead_task(timer, now);
return;
goto out;
}
read_lock(&tasklist_lock); /* arm_timer needs it. */
} else {
@ -1248,8 +1248,7 @@ void posix_cpu_timer_schedule(struct k_itimer *timer)
put_task_struct(p);
timer->it.cpu.task = p = NULL;
timer->it.cpu.expires.sched = 0;
read_unlock(&tasklist_lock);
return;
goto out_unlock;
} else if (unlikely(p->exit_state) && thread_group_empty(p)) {
/*
* We've noticed that the thread is dead, but
@ -1257,8 +1256,7 @@ void posix_cpu_timer_schedule(struct k_itimer *timer)
* drop our task ref.
*/
clear_dead_task(timer, now);
read_unlock(&tasklist_lock);
return;
goto out_unlock;
}
cpu_clock_sample_group(timer->it_clock, p, &now);
bump_cpu_timer(timer, now);
@ -1270,7 +1268,13 @@ void posix_cpu_timer_schedule(struct k_itimer *timer)
*/
arm_timer(timer, now);
out_unlock:
read_unlock(&tasklist_lock);
out:
timer->it_overrun_last = timer->it_overrun;
timer->it_overrun = -1;
++timer->it_requeue_pending;
}
/*