kthread: Don't looking for a task in create_kthread() #2

Remove the unnecessary find_task_by_pid_ns(). kthread() can just
use "current" to get the same result.

Signed-off-by: Vitaliy Gusev <vgusev@openvz.org>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 1 insertions, 3 deletions

diff --git a/kernel/kthread.c b/kernel/kthread.c
index 84bbadd4d02..c013bf000ce 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -76,6 +76,7 @@ static int kthread(void *_create)
 
         /* OK, tell user we're spawned, wait for stop or wakeup */
         __set_current_state(TASK_UNINTERRUPTIBLE);
+        create->result = current;
         complete(&create->started);
         schedule();
 
@@ -101,9 +102,6 @@ static void create_kthread(struct kthread_create_info *create)
         } else {
                 struct sched_param param = { .sched_priority = 0 };
                 wait_for_completion(&create->started);
-                read_lock(&tasklist_lock);
-                create->result = find_task_by_pid_ns(pid, &init_pid_ns);
-                read_unlock(&tasklist_lock);
                 /*
                  * root may have changed our (kthreadd's) priority or CPU mask.
                  * The kernel thread should not inherit these properties.