staging: zsmalloc: access page->private by using page_private macro

Signed-off-by: Sunghan Suh <sunghan.suh@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/zsmalloc/zsmalloc-main.c b/drivers/staging/zsmalloc/zsmalloc-main.c
index 4bb275b..1a67537 100644
--- a/drivers/staging/zsmalloc/zsmalloc-main.c
+++ b/drivers/staging/zsmalloc/zsmalloc-main.c
@@ -423,7 +423,7 @@
 	if (is_last_page(page))
 		next = NULL;
 	else if (is_first_page(page))
-		next = (struct page *)page->private;
+		next = (struct page *)page_private(page);
 	else
 		next = list_entry(page->lru.next, struct page, lru);
 
@@ -581,7 +581,7 @@
 			first_page->inuse = 0;
 		}
 		if (i == 1)
-			first_page->private = (unsigned long)page;
+			set_page_private(first_page, (unsigned long)page);
 		if (i >= 1)
 			page->first_page = first_page;
 		if (i >= 2)