[PATCH 03/13] mm/memory-failure: add macro GET_PAGE_MAX_RETRY_NUM

[Miaohe Lin <linmiaohe@huawei.com>]

Add helper macro GET_PAGE_MAX_RETRY_NUM to replace magic number 3.
No functional change intended.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
---
 mm/memory-failure.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 9c23adceee75..b571aaf987a2 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1446,6 +1446,8 @@ static int __get_hwpoison_page(struct page *page, unsigned long flags)
 	return 0;
 }
 
+#define GET_PAGE_MAX_RETRY_NUM 3
+
 static int get_any_page(struct page *p, unsigned long flags)
 {
 	int ret = 0, pass = 0;
@@ -1460,12 +1462,12 @@ static int get_any_page(struct page *p, unsigned long flags)
 		if (!ret) {
 			if (page_count(p)) {
 				/* We raced with an allocation, retry. */
-				if (pass++ < 3)
+				if (pass++ < GET_PAGE_MAX_RETRY_NUM)
 					goto try_again;
 				ret = -EBUSY;
 			} else if (!PageHuge(p) && !is_free_buddy_page(p)) {
 				/* We raced with put_page, retry. */
-				if (pass++ < 3)
+				if (pass++ < GET_PAGE_MAX_RETRY_NUM)
 					goto try_again;
 				ret = -EIO;
 			}
@@ -1491,7 +1493,7 @@ static int get_any_page(struct page *p, unsigned long flags)
 		 * A page we cannot handle. Check whether we can turn
 		 * it into something we can handle.
 		 */
-		if (pass++ < 3) {
+		if (pass++ < GET_PAGE_MAX_RETRY_NUM) {
 			put_page(p);
 			shake_page(p);
 			count_increased = false;
-- 
2.33.0