[PATCH v9 mm-unstable 19/19] mm/zsmalloc: reset zpdesc fields in reset_zpdesc()

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

To prepare for the future removal of struct page fields (e.g. the removal
of page->index [1]), update reset_zpdesc() to reset the descriptor
via struct zpdesc instead of struct page.

As struct zpdesc overlays struct page for now,
no functional change is intended.

[1] https://lore.kernel.org/linux-mm/Z09hOy-UY9KC8WMb@casper.infradead.org

Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
---
 mm/zsmalloc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index dae32e051779..817626a351f8 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -826,8 +826,8 @@ static void reset_zpdesc(struct zpdesc *zpdesc)
 
 	__ClearPageMovable(page);
 	ClearPagePrivate(page);
-	set_page_private(page, 0);
-	page->index = 0;
+	zpdesc->zspage = NULL;
+	zpdesc->next = NULL;
 	__ClearPageZsmalloc(page);
 }
 
-- 
2.43.5