diff options
| author | Anton Altaparmakov <aia21@cantab.net> | 2006-02-24 09:06:36 +0000 |
|---|---|---|
| committer | Anton Altaparmakov <aia21@cantab.net> | 2006-02-24 09:06:36 +0000 |
| commit | fab8d6ddf6dee2608869005d45fe97f70e4f5bdd (patch) | |
| tree | fecf566e03a87b2a44c7f3363ddb5c0d4bebdca7 /kernel/itimer.c | |
| parent | 64419d93a5906600af5817ad0cae3c6ecf7fb389 (diff) | |
| parent | f52ee1410d563cd409b08822492273a5bc235821 (diff) | |
Merge branch 'master' of /home/src/linux-2.6/
Diffstat (limited to 'kernel/itimer.c')
| -rw-r--r-- | kernel/itimer.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/kernel/itimer.c b/kernel/itimer.c index c2c05c4ff28d5..379be2f8c84c3 100644 --- a/kernel/itimer.c +++ b/kernel/itimer.c @@ -49,9 +49,11 @@ int do_getitimer(int which, struct itimerval *value) switch (which) { case ITIMER_REAL: + spin_lock_irq(&tsk->sighand->siglock); value->it_value = itimer_get_remtime(&tsk->signal->real_timer); value->it_interval = ktime_to_timeval(tsk->signal->it_real_incr); + spin_unlock_irq(&tsk->sighand->siglock); break; case ITIMER_VIRTUAL: read_lock(&tasklist_lock); @@ -150,18 +152,25 @@ int do_setitimer(int which, struct itimerval *value, struct itimerval *ovalue) switch (which) { case ITIMER_REAL: +again: + spin_lock_irq(&tsk->sighand->siglock); timer = &tsk->signal->real_timer; - hrtimer_cancel(timer); if (ovalue) { ovalue->it_value = itimer_get_remtime(timer); ovalue->it_interval = ktime_to_timeval(tsk->signal->it_real_incr); } + /* We are sharing ->siglock with it_real_fn() */ + if (hrtimer_try_to_cancel(timer) < 0) { + spin_unlock_irq(&tsk->sighand->siglock); + goto again; + } tsk->signal->it_real_incr = timeval_to_ktime(value->it_interval); expires = timeval_to_ktime(value->it_value); if (expires.tv64 != 0) hrtimer_start(timer, expires, HRTIMER_REL); + spin_unlock_irq(&tsk->sighand->siglock); break; case ITIMER_VIRTUAL: nval = timeval_to_cputime(&value->it_value); |