[PATCH v9 mm-unstable 18/18] mm/zsmalloc: introduce __zpdesc_clear/set_zsmalloc()

[Hyeonggon Yoo <42.hyeyoo@gmail.com>]

From: Alex Shi <alexs@kernel.org>

Add helper __zpdesc_clear_zsmalloc() for __ClearPageZsmalloc(),
__zpdesc_set_zsmalloc() for __SetPageZsmalloc(), and use them in
callers.

[42.hyeyoo: keep reset_zpdesc() to use struct page]
Signed-off-by: Alex Shi <alexs@kernel.org>
Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
---
 mm/zpdesc.h   | 10 ++++++++++
 mm/zsmalloc.c |  6 +++---
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/mm/zpdesc.h b/mm/zpdesc.h
index fa80c50993c6..2da58339ac5b 100644
--- a/mm/zpdesc.h
+++ b/mm/zpdesc.h
@@ -155,6 +155,16 @@ static inline void __zpdesc_set_movable(struct zpdesc *zpdesc,
 	__SetPageMovable(zpdesc_page(zpdesc), mops);
 }
 
+static inline void __zpdesc_set_zsmalloc(struct zpdesc *zpdesc)
+{
+	__SetPageZsmalloc(zpdesc_page(zpdesc));
+}
+
+static inline void __zpdesc_clear_zsmalloc(struct zpdesc *zpdesc)
+{
+	__ClearPageZsmalloc(zpdesc_page(zpdesc));
+}
+
 static inline bool zpdesc_is_isolated(struct zpdesc *zpdesc)
 {
 	return PageIsolated(zpdesc_page(zpdesc));
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 3a841e16746e..dae32e051779 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -1001,13 +1001,13 @@ static struct zspage *alloc_zspage(struct zs_pool *pool,
 		if (!zpdesc) {
 			while (--i >= 0) {
 				zpdesc_dec_zone_page_state(zpdescs[i]);
-				__ClearPageZsmalloc(zpdesc_page(zpdescs[i]));
+				__zpdesc_clear_zsmalloc(zpdescs[i]);
 				free_zpdesc(zpdescs[i]);
 			}
 			cache_free_zspage(pool, zspage);
 			return NULL;
 		}
-		__SetPageZsmalloc(zpdesc_page(zpdesc));
+		__zpdesc_set_zsmalloc(zpdesc);
 
 		zpdesc_inc_zone_page_state(zpdesc);
 		zpdescs[i] = zpdesc;
@@ -1786,7 +1786,7 @@ static int zs_page_migrate(struct page *newpage, struct page *page,
 	VM_BUG_ON_PAGE(!zpdesc_is_isolated(zpdesc), zpdesc_page(zpdesc));
 
 	/* We're committed, tell the world that this is a Zsmalloc page. */
-	__SetPageZsmalloc(zpdesc_page(newzpdesc));
+	__zpdesc_set_zsmalloc(newzpdesc);
 
 	/* The page is locked, so this pointer must remain valid */
 	zspage = get_zspage(zpdesc);
-- 
2.43.5