From: Oleg Nesterov Date: Wed, 30 Apr 2008 07:52:54 +0000 (-0700) Subject: signals: change send_signal/do_send_sigqueue to take "boolean group" parameter X-Git-Tag: v2.6.26-rc1~288 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2ca3515aa57224edf0151e05a8c9f21a76bf5957;p=linux-2.6 signals: change send_signal/do_send_sigqueue to take "boolean group" parameter send_signal() is used either with ->pending or with ->signal->shared_pending. Change it to take "int group" instead, this argument will be re-used later. Signed-off-by: Oleg Nesterov Cc: Roland McGrath Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/kernel/signal.c b/kernel/signal.c index 3479a118ba..f2fc3a9ea8 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -754,18 +754,21 @@ static inline int legacy_queue(struct sigpending *signals, int sig) } static int send_signal(int sig, struct siginfo *info, struct task_struct *t, - struct sigpending *signals) + int group) { + struct sigpending *pending; struct sigqueue *q; assert_spin_locked(&t->sighand->siglock); handle_stop_signal(sig, t); + + pending = group ? &t->signal->shared_pending : &t->pending; /* * Short-circuit ignored signals and support queuing * exactly one non-rt signal, so that we can get more * detailed information about the cause of the signal. */ - if (sig_ignored(t, sig) || legacy_queue(signals, sig)) + if (sig_ignored(t, sig) || legacy_queue(pending, sig)) return 0; /* @@ -793,7 +796,7 @@ static int send_signal(int sig, struct siginfo *info, struct task_struct *t, (is_si_special(info) || info->si_code >= 0))); if (q) { - list_add_tail(&q->list, &signals->list); + list_add_tail(&q->list, &pending->list); switch ((unsigned long) info) { case (unsigned long) SEND_SIG_NOINFO: q->info.si_signo = sig; @@ -823,7 +826,7 @@ static int send_signal(int sig, struct siginfo *info, struct task_struct *t, } out_set: - sigaddset(&signals->signal, sig); + sigaddset(&pending->signal, sig); return 1; } @@ -864,7 +867,7 @@ specific_send_sig_info(int sig, struct siginfo *info, struct task_struct *t) { int ret; - ret = send_signal(sig, info, t, &t->pending); + ret = send_signal(sig, info, t, 0); if (ret <= 0) return ret; @@ -923,7 +926,7 @@ __group_send_sig_info(int sig, struct siginfo *info, struct task_struct *p) * We always use the shared queue for process-wide signals, * to avoid several races. */ - ret = send_signal(sig, info, p, &p->signal->shared_pending); + ret = send_signal(sig, info, p, 1); if (ret <= 0) return ret; @@ -1258,8 +1261,10 @@ void sigqueue_free(struct sigqueue *q) } static int do_send_sigqueue(int sig, struct sigqueue *q, struct task_struct *t, - struct sigpending *pending) + int group) { + struct sigpending *pending; + handle_stop_signal(sig, t); if (unlikely(!list_empty(&q->list))) { @@ -1277,8 +1282,10 @@ static int do_send_sigqueue(int sig, struct sigqueue *q, struct task_struct *t, return 1; signalfd_notify(t, sig); + pending = group ? &t->signal->shared_pending : &t->pending; list_add_tail(&q->list, &pending->list); sigaddset(&pending->signal, sig); + return 0; } @@ -1300,7 +1307,7 @@ int send_sigqueue(int sig, struct sigqueue *q, struct task_struct *p) if (!likely(lock_task_sighand(p, &flags))) goto out_err; - ret = do_send_sigqueue(sig, q, p, &p->pending); + ret = do_send_sigqueue(sig, q, p, 0); if (!sigismember(&p->blocked, sig)) signal_wake_up(p, sig == SIGKILL); @@ -1321,7 +1328,7 @@ send_group_sigqueue(int sig, struct sigqueue *q, struct task_struct *p) /* Since it_lock is held, p->sighand cannot be NULL. */ spin_lock_irqsave(&p->sighand->siglock, flags); - ret = do_send_sigqueue(sig, q, p, &p->signal->shared_pending); + ret = do_send_sigqueue(sig, q, p, 1); __group_complete_signal(sig, p);