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mm: hugetlb_vmemmap: add check of CONFIG_MEMORY_HOTPLUG back

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The compiler will optimize the code as much as possible if we add the
check of CONFIG_MEMORY_HOTPLUG back.

Link: https://lkml.kernel.org/r/20231205030530.3802-1-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Muchun Song 2023-12-05 11:05:30 +08:00 committed by Andrew Morton
parent a1748f85be
commit 47e61d8874
1 changed files with 1 additions and 1 deletions
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mm/hugetlb_vmemmap.c
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@ -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)));