fork: Rename bad_fork_cleanup_threadgroup_lock to bad_fork_cleanup_delayacct

I just fixed a bug in copy_process when using the label
bad_fork_cleanup_threadgroup_lock.  While fixing the bug I looked
closer at the label and realized it has been misnamed since
568ac888 ("cgroup: reduce read locked section of
cgroup_threadgroup_rwsem during fork").

Fix the name so that fork is easier to understand.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

kernel/fork.c

@@ -2120,14 +2120,14 @@ static __latent_entropy struct task_struct *copy_process(
 	cgroup_fork(p);
 	if (p->flags & PF_KTHREAD) {
 		if (!set_kthread_struct(p))
-			goto bad_fork_cleanup_threadgroup_lock;
+			goto bad_fork_cleanup_delayacct;
 	}
 #ifdef CONFIG_NUMA
 	p->mempolicy = mpol_dup(p->mempolicy);
 	if (IS_ERR(p->mempolicy)) {
 		retval = PTR_ERR(p->mempolicy);
 		p->mempolicy = NULL;
-		goto bad_fork_cleanup_threadgroup_lock;
+		goto bad_fork_cleanup_delayacct;
 	}
 #endif
 #ifdef CONFIG_CPUSETS
@@ -2465,7 +2465,7 @@ static __latent_entropy struct task_struct *copy_process(
 #ifdef CONFIG_NUMA
 	mpol_put(p->mempolicy);
 #endif
-bad_fork_cleanup_threadgroup_lock:
+bad_fork_cleanup_delayacct:
 	delayacct_tsk_free(p);
 bad_fork_cleanup_count:
 	dec_rlimit_ucounts(task_ucounts(p), UCOUNT_RLIMIT_NPROC, 1);