diff options
Diffstat (limited to 'kernel/signal.c')
| -rw-r--r-- | kernel/signal.c | 29 |
1 files changed, 17 insertions, 12 deletions
diff --git a/kernel/signal.c b/kernel/signal.c index 1ab89f67742..4d97e11d767 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -2299,6 +2299,18 @@ long do_no_restart_syscall(struct restart_block *param) return -EINTR; } +static void __set_task_blocked(struct task_struct *tsk, const sigset_t *newset) +{ + if (signal_pending(tsk) && !thread_group_empty(tsk)) { + sigset_t newblocked; + /* A set of now blocked but previously unblocked signals. */ + signandsets(&newblocked, newset, ¤t->blocked); + retarget_shared_pending(tsk, &newblocked); + } + tsk->blocked = *newset; + recalc_sigpending(); +} + /** * set_current_blocked - change current->blocked mask * @newset: new mask @@ -2311,14 +2323,7 @@ void set_current_blocked(const sigset_t *newset) struct task_struct *tsk = current; spin_lock_irq(&tsk->sighand->siglock); - if (signal_pending(tsk) && !thread_group_empty(tsk)) { - sigset_t newblocked; - /* A set of now blocked but previously unblocked signals. */ - signandsets(&newblocked, newset, ¤t->blocked); - retarget_shared_pending(tsk, &newblocked); - } - tsk->blocked = *newset; - recalc_sigpending(); + __set_task_blocked(tsk, newset); spin_unlock_irq(&tsk->sighand->siglock); } @@ -2541,7 +2546,8 @@ int do_sigtimedwait(const sigset_t *which, siginfo_t *info, /* * None ready, temporarily unblock those we're interested * while we are sleeping in so that we'll be awakened when - * they arrive. + * they arrive. Unblocking is always fine, we can avoid + * set_current_blocked(). */ tsk->real_blocked = tsk->blocked; sigandsets(&tsk->blocked, &tsk->blocked, &mask); @@ -2551,10 +2557,9 @@ int do_sigtimedwait(const sigset_t *which, siginfo_t *info, timeout = schedule_timeout_interruptible(timeout); spin_lock_irq(&tsk->sighand->siglock); - sig = dequeue_signal(tsk, &mask, info); - tsk->blocked = tsk->real_blocked; + __set_task_blocked(tsk, &tsk->real_blocked); siginitset(&tsk->real_blocked, 0); - recalc_sigpending(); + sig = dequeue_signal(tsk, &mask, info); } spin_unlock_irq(&tsk->sighand->siglock); |