security: fix error return path in ima_inode_alloc

If radix_tree_preload is failed in ima_inode_alloc, we don't need
radix_tree_preload_end because kernel is alread preempt enabled

Signed-off-by: Xiaotian Feng <[e-mail]>
Signed-off-by: Mimi Zohar <[e-mail]>
Signed-off-by: James Morris <[e-mail]>

security/integrity/ima/ima_iint.c

···
 	spin_lock(&ima_iint_lock);
 	rc = radix_tree_insert(&ima_iint_store, (unsigned long)inode, iint);
 	spin_unlock(&ima_iint_lock);
+	radix_tree_preload_end();
 out:
 	if (rc < 0)
 		kmem_cache_free(iint_cache, iint);
-
-	radix_tree_preload_end();
 
 	return rc;
 }