From: Oleg Nesterov Date: Wed, 30 Apr 2008 07:52:50 +0000 (-0700) Subject: signals: move handle_stop_signal() into send_signal() X-Git-Tag: v2.6.26-rc1~293 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6e65acba7ca8169e38ab55d62d52f29a75fb141f;p=platform%2Fkernel%2Flinux-stable.git signals: move handle_stop_signal() into send_signal() Move handle_stop_signal() into send_signal(). This factors out a couple of callsites and allows us to do further unifications. Also, with this change specific_send_sig_info() does handle_stop_signal(). Not that this is really important, we never send STOP/CONT via send_sig() and friends, but still this looks more consistent. The only (afaics) special case is get_signal_to_deliver(). If the traced task dequeues SIGCONT, it can re-send it to itself after ptrace_stop() if the signal was blocked by debugger. In that case handle_stop_signal() is unnecessary, but hopefully not a problem. 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 db442c5..b3dedf1 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -660,8 +660,10 @@ 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) { - struct sigqueue * q = NULL; + struct sigqueue *q; + assert_spin_locked(&t->sighand->siglock); + handle_stop_signal(sig, t); /* * Short-circuit ignored signals and support queuing * exactly one non-rt signal, so that we can get more @@ -766,9 +768,6 @@ specific_send_sig_info(int sig, struct siginfo *info, struct task_struct *t) { int ret; - BUG_ON(!irqs_disabled()); - assert_spin_locked(&t->sighand->siglock); - ret = send_signal(sig, info, t, &t->pending); if (ret <= 0) return ret; @@ -923,9 +922,6 @@ __group_send_sig_info(int sig, struct siginfo *info, struct task_struct *p) { int ret; - assert_spin_locked(&p->sighand->siglock); - handle_stop_signal(sig, p); - /* * Put this signal on the shared-pending queue, or fail with EAGAIN. * We always use the shared queue for process-wide signals, @@ -2241,7 +2237,6 @@ static int do_tkill(int tgid, int pid, int sig) */ if (!error && sig && p->sighand) { spin_lock_irq(&p->sighand->siglock); - handle_stop_signal(sig, p); error = specific_send_sig_info(sig, &info, p); spin_unlock_irq(&p->sighand->siglock); }