mm/dynamic_hugetlb: check page using check_new_page

hulk inclusion
category: bugfix
bugzilla: 46904 https://gitee.com/openeuler/kernel/issues/I4Y0XO

--------------------------------

Use check_new_page to check the page to be allocated.
Signed-off-by: NLiu Shixin <liushixin2@huawei.com>
Reviewed-by: NKefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

mm/dynamic_hugetlb.c

@@ -476,20 +476,23 @@ static struct page *__alloc_page_from_dhugetlb_pool(void)
 	 */
 	spin_lock_irqsave(&percpu_pool->lock, flags);
 
-	if (percpu_pool->free_pages == 0) {
-		int ret;
-
-		spin_lock(&hpool->lock);
-		ret = add_pages_to_percpu_pool(hpool, percpu_pool,
-						PERCPU_POOL_PAGE_BATCH);
-		spin_unlock(&hpool->lock);
-		if (ret)
-			goto unlock;
-	}
+	do {
+		page = NULL;
+		if (percpu_pool->free_pages == 0) {
+			int ret;
+
+			spin_lock(&hpool->lock);
+			ret = add_pages_to_percpu_pool(hpool, percpu_pool,
+							PERCPU_POOL_PAGE_BATCH);
+			spin_unlock(&hpool->lock);
+			if (ret)
+				goto unlock;
+		}
 
-	page = list_entry(percpu_pool->head_page.next, struct page, lru);
-	list_del(&page->lru);
-	percpu_pool->free_pages--;
+		page = list_entry(percpu_pool->head_page.next, struct page, lru);
+		list_del(&page->lru);
+		percpu_pool->free_pages--;
+	} while (page && check_new_page(page));
 	percpu_pool->used_pages++;
 	SetPagePool(page);
 

mm/internal.h

@@ -195,6 +195,7 @@ extern void memblock_free_pages(struct page *page, unsigned long pfn,
 					unsigned int order);
 extern void __free_pages_core(struct page *page, unsigned int order);
 extern void prep_compound_page(struct page *page, unsigned int order);
+extern int check_new_page(struct page *page);
 extern void post_alloc_hook(struct page *page, unsigned int order,
 					gfp_t gfp_flags);
 extern void prep_new_page(struct page *page, unsigned int order, gfp_t gfp_flags,

mm/page_alloc.c

@@ -2204,7 +2204,7 @@ static void check_new_page_bad(struct page *page)
 /*
  * This page is about to be returned from the page allocator
  */
-static inline int check_new_page(struct page *page)
+inline int check_new_page(struct page *page)
 {
 	if (likely(page_expected_state(page,
 				PAGE_FLAGS_CHECK_AT_PREP|__PG_HWPOISON)))