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remove the no longer needed pid_alive() check in __task_pid_nr_ns() 

Starting from 2c4704756c ("pids: Move the pgrp and session pid pointers
from task_struct to signal_struct") __task_pid_nr_ns() doesn't dereference
task->group_leader, we can remove the pid_alive() check.

pid_nr_ns() has to check pid != NULL anyway, pid_alive() just adds the
unnecessary confusion.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
This commit is contained in:
Oleg Nesterov 2020-04-21 12:19:04 +02:00 committed by Eric W. Biederman
parent 06576edd0e
commit 1dd694a1b7
1 changed files with 1 additions and 2 deletions
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3
kernel/pid.c
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@ -495,8 +495,7 @@ pid_t __task_pid_nr_ns(struct task_struct *task, enum pid_type type,
rcu_read_lock();
if (!ns)
ns = task_active_pid_ns(current);
if (likely(pid_alive(task)))
nr = pid_nr_ns(rcu_dereference(*task_pid_ptr(task, type)), ns);
nr = pid_nr_ns(rcu_dereference(*task_pid_ptr(task, type)), ns);
rcu_read_unlock();
return nr;