linux-kernel - [PATCH 15/20] signal: Push pid type down into complete

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Date:   Mon, 23 Jul 2018 22:24:14 -0500
From:   "Eric W. Biederman" <ebiederm@...ssion.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Oleg Nesterov <oleg@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, Wen Yang <wen.yang99@....com.cn>,
        majiang <ma.jiang@....com.cn>,
        "Eric W. Biederman" <ebiederm@...ssion.com>
Subject: [PATCH 15/20] signal: Push pid type down into complete_signal.

This is the bottom and by pushing this down it simplifies the callers
and otherwise leaves things as is.  This is in preparation for allowing
fork to implement better handling of signals set to groups of processes.

Signed-off-by: "Eric W. Biederman" <ebiederm@...ssion.com>
---
 kernel/signal.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/kernel/signal.c b/kernel/signal.c
index 1ef94303d87a..dddbea558455 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -895,7 +895,7 @@ static inline int wants_signal(int sig, struct task_struct *p)
 	return task_curr(p) || !signal_pending(p);
 }
 
-static void complete_signal(int sig, struct task_struct *p, int group)
+static void complete_signal(int sig, struct task_struct *p, enum pid_type type)
 {
 	struct signal_struct *signal = p->signal;
 	struct task_struct *t;
@@ -908,7 +908,7 @@ static void complete_signal(int sig, struct task_struct *p, int group)
 	 */
 	if (wants_signal(sig, p))
 		t = p;
-	else if (!group || thread_group_empty(p))
+	else if ((type == PIDTYPE_PID) || thread_group_empty(p))
 		/*
 		 * There is just one thread and it does not need to be woken.
 		 * It will dequeue unblocked signals before it runs again.
@@ -1096,7 +1096,7 @@ static int __send_signal(int sig, struct siginfo *info, struct task_struct *t,
 out_set:
 	signalfd_notify(t, sig);
 	sigaddset(&pending->signal, sig);
-	complete_signal(sig, t, type != PIDTYPE_PID);
+	complete_signal(sig, t, type);
 ret:
 	trace_signal_generate(sig, info, t, type != PIDTYPE_PID, result);
 	return ret;
@@ -1704,7 +1704,7 @@ int send_sigqueue(struct sigqueue *q, struct pid *pid, enum pid_type type)
 	pending = (type != PIDTYPE_PID) ? &t->signal->shared_pending : &t->pending;
 	list_add_tail(&q->list, &pending->list);
 	sigaddset(&pending->signal, sig);
-	complete_signal(sig, t, type != PIDTYPE_PID);
+	complete_signal(sig, t, type);
 	result = TRACE_SIGNAL_DELIVERED;
 out:
 	trace_signal_generate(sig, &q->info, t, type != PIDTYPE_PID, result);
-- 
2.17.1