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 <oleg@tv-sign.ru>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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 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 @@
{
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 @@
{
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 @@
*/
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);
}