[PATCH 23/23] mm/zsmalloc: introduce zpdesc_clear_first() helper

[alexs]

From: Alex Shi <alexs@xxxxxxxxxx>

Like the zpdesc_set_first(), introduce zpdesc_clear_first() helper for
ClearPagePrivate(), then clean up a 'struct page' usage in
reset_zpdesc().

Signed-off-by: Alex Shi <alexs@xxxxxxxxxx>
To: linux-kernel@xxxxxxxxxxxxxxx
To: linux-mm@xxxxxxxxx
To: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
To: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
To: Minchan Kim <minchan@xxxxxxxxxx>
---
 mm/zsmalloc.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 50ce4a3b8279..731055ccef23 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -259,6 +259,11 @@ static inline void zpdesc_set_first(struct zpdesc *zpdesc)
 	SetPagePrivate(zpdesc_page(zpdesc));
 }
 
+static inline void zpdesc_clear_first(struct zpdesc *zpdesc)
+{
+	ClearPagePrivate(zpdesc_page(zpdesc));
+}
+
 static inline void zpdesc_inc_zone_page_state(struct zpdesc *zpdesc)
 {
 	inc_zone_page_state(zpdesc_page(zpdesc), NR_ZSPAGES);
@@ -844,10 +849,8 @@ static inline bool obj_allocated(struct zpdesc *zpdesc, void *obj,
 
 static void reset_zpdesc(struct zpdesc *zpdesc)
 {
-	struct page *page = zpdesc_page(zpdesc);
-
 	__zpdesc_clear_movable(zpdesc);
-	ClearPagePrivate(page);
+	zpdesc_clear_first(zpdesc);
 	zpdesc->zspage = NULL;
 	zpdesc->next = NULL;
 	reset_first_obj_offset(zpdesc);
-- 
2.43.0