apparmor: Simplify obtain the newest label on a cred

In aa_get_task_label(), aa_get_newest_cred_label(__task_cred(task))
can do the same things as aa_get_newest_label(__aa_task_raw_label(task)),
so we can replace it and remove __aa_task_raw_label() to simplify the code.

Signed-off-by: Gaosheng Cui <[e-mail]>
Signed-off-by: John Johansen <[e-mail]>

security/apparmor/include/cred.h

···
 }
 
 /**
- * __aa_task_raw_label - retrieve another task's label
- * @task: task to query  (NOT NULL)
- *
- * Returns: @task's label without incrementing its ref count
- *
- * If @task != current needs to be called in RCU safe critical section
- */
-static inline struct aa_label *__aa_task_raw_label(struct task_struct *task)
-{
-	return aa_cred_raw_label(__task_cred(task));
-}
-
-/**
  * aa_current_raw_label - find the current tasks confining label
  *
  * Returns: up to date confining label or the ns unconfined label (NOT NULL)

security/apparmor/task.c

···
 	struct aa_label *p;
 
 	rcu_read_lock();
-	p = aa_get_newest_label(__aa_task_raw_label(task));
+	p = aa_get_newest_cred_label(__task_cred(task));
 	rcu_read_unlock();
 
 	return p;