thp: use khugepaged_enabled to remove duplicate code

Use khugepaged_enabled to see whether thp is enabled

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 073d687c89dea550752d5748412aa360e41842c5..5841c81a75f598a0efd6f311188f66ee81c7b059 100644 (file)
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -102,10 +102,7 @@ static int set_recommended_min_free_kbytes(void)
        unsigned long recommended_min;
        extern int min_free_kbytes;
 
-       if (!test_bit(TRANSPARENT_HUGEPAGE_FLAG,
-                     &transparent_hugepage_flags) &&
-           !test_bit(TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG,
-                     &transparent_hugepage_flags))
+       if (!khugepaged_enabled())
                return 0;
 
        for_each_populated_zone(zone)
@@ -228,11 +225,7 @@ static ssize_t enabled_store(struct kobject *kobj,
                        ret = err;
        }
 
-       if (ret > 0 &&
-           (test_bit(TRANSPARENT_HUGEPAGE_FLAG,
-                     &transparent_hugepage_flags) ||
-            test_bit(TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG,
-                     &transparent_hugepage_flags)))
+       if (ret > 0 && khugepaged_enabled())
                set_recommended_min_free_kbytes();
 
        return ret;