From: Muchun Song <songmuchun@bytedance.com>
Date: Tue, 28 Jun 2022 09:22:35 +0000 (+0800)
Subject: mm: hugetlb_vmemmap: use PTRS_PER_PTE instead of PMD_SIZE / PAGE_SIZE
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e38f055d6d9a060dbf3f69fbac5b3b04a1566a56;p=linux.git

mm: hugetlb_vmemmap: use PTRS_PER_PTE instead of PMD_SIZE / PAGE_SIZE

There is already a macro PTRS_PER_PTE to represent the number of page
table entries, just use it.

Link: https://lkml.kernel.org/r/20220628092235.91270-9-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Will Deacon <will@kernel.org>
Cc: Xiongchun Duan <duanxiongchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/mm/hugetlb_vmemmap.c b/mm/hugetlb_vmemmap.c
index 8da2b31bb59f5..20f414c0379f9 100644
--- a/mm/hugetlb_vmemmap.c
+++ b/mm/hugetlb_vmemmap.c
@@ -48,7 +48,7 @@ static int __split_vmemmap_huge_pmd(pmd_t *pmd, unsigned long start)
 
 	pmd_populate_kernel(&init_mm, &__pmd, pgtable);
 
-	for (i = 0; i < PMD_SIZE / PAGE_SIZE; i++, addr += PAGE_SIZE) {
+	for (i = 0; i < PTRS_PER_PTE; i++, addr += PAGE_SIZE) {
 		pte_t entry, *pte;
 		pgprot_t pgprot = PAGE_KERNEL;