summaryrefslogtreecommitdiffstats
path: root/kernel/pid.c
diff options
context:
space:
mode:
authorEric W. Biederman <ebiederm@xmission.com>2017-09-26 12:45:33 -0500
committerEric W. Biederman <ebiederm@xmission.com>2018-07-21 10:43:12 -0500
commit7a36094d61bfe9843de5484ff0140227983ac5d5 (patch)
tree7ebb9918a753ad3b0c8cd4ed128e7a99c3dd2f99 /kernel/pid.c
parent1fb53567a3633740aac8761eb7023dc5671f0edb (diff)
downloadlinux-7a36094d61bfe9843de5484ff0140227983ac5d5.tar.bz2
pids: Compute task_tgid using signal->leader_pid
The cost is the the same and this removes the need to worry about complications that come from de_thread and group_leader changing. __task_pid_nr_ns has been updated to take advantage of this change. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'kernel/pid.c')
-rw-r--r--kernel/pid.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/kernel/pid.c b/kernel/pid.c
index 157fe4b19971..d0de2b59f86f 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -421,13 +421,14 @@ pid_t __task_pid_nr_ns(struct task_struct *task, enum pid_type type,
if (!ns)
ns = task_active_pid_ns(current);
if (likely(pid_alive(task))) {
- if (type != PIDTYPE_PID) {
- if (type == __PIDTYPE_TGID)
- type = PIDTYPE_PID;
-
- task = task->group_leader;
- }
- nr = pid_nr_ns(rcu_dereference(task->pids[type].pid), ns);
+ struct pid *pid;
+ if (type == PIDTYPE_PID)
+ pid = task_pid(task);
+ else if (type == __PIDTYPE_TGID)
+ pid = task_tgid(task);
+ else
+ pid = rcu_dereference(task->group_leader->pids[type].pid);
+ nr = pid_nr_ns(pid, ns);
}
rcu_read_unlock();