thp: remove unnecessary check in start_khugepaged

The check is unnecessary since if mm_slot_cache or mm_slots_hash
initialize failed, no sysfs interface will be created

Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index ed6719f63fa212dc67bf391bc34c95ea0a1db421..91b5066b76627fe3456b3533af6678f7eb7fc3f0 100644 (file)
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -140,10 +140,7 @@ static int start_khugepaged(void)
        int err = 0;
        if (khugepaged_enabled()) {
                int wakeup;
-               if (unlikely(!mm_slot_cache || !mm_slots_hash)) {
-                       err = -ENOMEM;
-                       goto out;
-               }
+
                mutex_lock(&khugepaged_mutex);
                if (!khugepaged_thread)
                        khugepaged_thread = kthread_run(khugepaged, NULL,
@@ -163,7 +160,7 @@ static int start_khugepaged(void)
        } else
                /* wakeup to exit */
                wake_up_interruptible(&khugepaged_wait);
-out:
+
        return err;
 }