--- a/arch/x86/mm/init_64.c~memory-hotplug-common-apis-to-support-page-tables-hot-remove-fix-fix-fix-fix-fix-fix-fix
+++ a/arch/x86/mm/init_64.c
@@ -993,12 +993,12 @@ remove_pagetable(unsigned long start, un
 	bool pgd_changed = false;
 
 	for (; start < end; start = next) {
+		next = pgd_addr_end(start, end);
+
 		pgd = pgd_offset_k(start);
 		if (!pgd_present(*pgd))
 			continue;
 
-		next = pgd_addr_end(start, end);
-
 		pud = (pud_t *)pgd_page_vaddr(*pgd);
 		remove_pud_table(pud, start, next, direct);
 		if (free_pud_table(pud, pgd))