The compiler will optimize the code as much as possible if we add
the check of CONFIG_MEMORY_HOTPLUG back.
Signed-off-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
---
mm/hugetlb_vmemmap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/hugetlb_vmemmap.c b/mm/hugetlb_vmemmap.c
index eb05596662d42..be1586a114ce1 100644
--- a/mm/hugetlb_vmemmap.c
+++ b/mm/hugetlb_vmemmap.c
@@ -119,7 +119,7 @@ static int vmemmap_pmd_entry(pmd_t *pmd, unsigned long addr,
* +--+ | |
* +------------------------+
*/
- if (unlikely(!vmemmap_walk->nr_walked)) {
+ if (IS_ENABLED(CONFIG_MEMORY_HOTPLUG) && unlikely(!vmemmap_walk->nr_walked)) {
struct page *page = head ? head + pte_index(addr) :
pte_page(ptep_get(pte_offset_kernel(pmd, addr)));
--
2.20.1
