signal: Push pid type down into send_signal

This information is already available in the callers and by pushing it
down it makes the code a little clearer, and allows better group
signal behavior in fork.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

kernel/signal.c

@@ -1103,7 +1103,7 @@ ret:
 }
 
 static int send_signal(int sig, struct siginfo *info, struct task_struct *t,
-			int group)
+			enum pid_type type)
 {
 	int from_ancestor_ns = 0;
 
@@ -1112,7 +1112,7 @@ static int send_signal(int sig, struct siginfo *info, struct task_struct *t,
 			   !task_pid_nr_ns(current, task_active_pid_ns(t));
 #endif
 
-	return __send_signal(sig, info, t, group, from_ancestor_ns);
+	return __send_signal(sig, info, t, type != PIDTYPE_PID, from_ancestor_ns);
 }
 
 static void print_fatal_signal(int signr)
@@ -1151,13 +1151,13 @@ __setup("print-fatal-signals=", setup_print_fatal_signals);
 int
 __group_send_sig_info(int sig, struct siginfo *info, struct task_struct *p)
 {
-	return send_signal(sig, info, p, 1);
+	return send_signal(sig, info, p, PIDTYPE_TGID);
 }
 
 static int
 specific_send_sig_info(int sig, struct siginfo *info, struct task_struct *t)
 {
-	return send_signal(sig, info, t, 0);
+	return send_signal(sig, info, t, PIDTYPE_PID);
 }
 
 int do_send_sig_info(int sig, struct siginfo *info, struct task_struct *p,
@@ -1167,7 +1167,7 @@ int do_send_sig_info(int sig, struct siginfo *info, struct task_struct *p,
 	int ret = -ESRCH;
 
 	if (lock_task_sighand(p, &flags)) {
-		ret = send_signal(sig, info, p, type != PIDTYPE_PID);
+		ret = send_signal(sig, info, p, type);
 		unlock_task_sighand(p, &flags);
 	}
 
@@ -3966,7 +3966,7 @@ void kdb_send_sig(struct task_struct *t, int sig)
 			   "the deadlock.\n");
 		return;
 	}
-	ret = send_signal(sig, SEND_SIG_PRIV, t, false);
+	ret = send_signal(sig, SEND_SIG_PRIV, t, PIDTYPE_PID);
 	spin_unlock(&t->sighand->siglock);
 	if (ret)
 		kdb_printf("Fail to deliver Signal %d to process %d.\n",