linux-kernel - [RFC PATCH v2 03/21] mm/zsmalloc: replace first_page to first

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Date:   Thu, 13 Jul 2023 13:20:18 +0900
From:   Hyeonggon Yoo <42.hyeyoo@...il.com>
To:     Minchan Kim <minchan@...nel.org>,
        Sergey Senozhatsky <senozhatsky@...omium.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Matthew Wilcox <willy@...radead.org>,
        Mike Rapoport <rppt@...nel.org>,
        Hyeonggon Yoo <42.hyeyoo@...il.com>
Subject: [RFC PATCH v2 03/21] mm/zsmalloc: replace first_page to first_zsdesc in struct zspage

Replace first_page to first_zsdesc in struct zspage for further
conversion.

Signed-off-by: Hyeonggon Yoo <42.hyeyoo@...il.com>
---
 mm/zsmalloc.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 11c203e79c39..8f7d9b79d849 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -234,7 +234,7 @@ struct zspage {
 	};
 	unsigned int inuse;
 	unsigned int freeobj;
-	struct page *first_page;
+	struct zsdesc *first_zsdesc;
 	struct list_head list; /* fullness list */
 	struct zs_pool *pool;
 	rwlock_t lock;
@@ -512,7 +512,7 @@ static inline void mod_zspage_inuse(struct zspage *zspage, int val)
 
 static inline struct page *get_first_page(struct zspage *zspage)
 {
-	struct page *first_page = zspage->first_page;
+	struct page *first_page = zsdesc_page(zspage->first_zsdesc);
 
 	VM_BUG_ON_PAGE(!is_first_page(first_page), first_page);
 	return first_page;
@@ -1024,7 +1024,7 @@ static void create_page_chain(struct size_class *class, struct zspage *zspage,
 		set_page_private(page, (unsigned long)zspage);
 		page->index = 0;
 		if (i == 0) {
-			zspage->first_page = page;
+			zspage->first_zsdesc = page_zsdesc(page);
 			SetPagePrivate(page);
 			if (unlikely(class->objs_per_zspage == 1 &&
 					class->pages_per_zspage == 1))
@@ -1398,7 +1398,7 @@ static unsigned long obj_malloc(struct zs_pool *pool,
 		link->handle = handle;
 	else
 		/* record handle to page->index */
-		zspage->first_page->index = handle;
+		zspage->first_zsdesc->handle = handle;
 
 	kunmap_atomic(vaddr);
 	mod_zspage_inuse(zspage, 1);
-- 
2.41.0