Commit 47e61d88 authored Dec 05, 2023 by Muchun Song Committed by Andrew Morton Dec 12, 2023

mm: hugetlb_vmemmap: add check of CONFIG_MEMORY_HOTPLUG back

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>

parent a1748f85

mm/hugetlb_vmemmap.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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)));