diff options
| -rw-r--r-- | kernel/sys.c | 13 |
1 files changed, 1 insertions, 12 deletions
diff --git a/kernel/sys.c b/kernel/sys.c index 84371fdc660b..7ef7f6054c28 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -1206,7 +1206,7 @@ asmlinkage long sys_times(struct tms __user * tbuf) struct task_struct *t; cputime_t utime, stime, cutime, cstime; - read_lock(&tasklist_lock); + spin_lock_irq(&tsk->sighand->siglock); utime = tsk->signal->utime; stime = tsk->signal->stime; t = tsk; @@ -1216,20 +1216,9 @@ asmlinkage long sys_times(struct tms __user * tbuf) t = next_thread(t); } while (t != tsk); - /* - * While we have tasklist_lock read-locked, no dying thread - * can be updating current->signal->[us]time. Instead, - * we got their counts included in the live thread loop. - * However, another thread can come in right now and - * do a wait call that updates current->signal->c[us]time. - * To make sure we always see that pair updated atomically, - * we take the siglock around fetching them. - */ - spin_lock_irq(&tsk->sighand->siglock); cutime = tsk->signal->cutime; cstime = tsk->signal->cstime; spin_unlock_irq(&tsk->sighand->siglock); - read_unlock(&tasklist_lock); tmp.tms_utime = cputime_to_clock_t(utime); tmp.tms_stime = cputime_to_clock_t(stime); |