linux-kernel - [RFC PATCH v2 12/21] mm/zsmalloc: convert obj_to_page() and zs

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Date:   Thu, 13 Jul 2023 13:20:27 +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 12/21] mm/zsmalloc: convert obj_to_page() and zs_free() to use zsdesc

Convert obj_to_page() to obj_to_zsdesc() and also convert its user
zs_free() to use zsdesc.

Signed-off-by: Hyeonggon Yoo <42.hyeyoo@...il.com>
---
 mm/zsmalloc.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index c8c3039a751a..5141a0c72c61 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -915,10 +915,10 @@ static void obj_to_location(unsigned long obj, struct zsdesc **zsdesc,
 	*obj_idx = (obj & OBJ_INDEX_MASK);
 }
 
-static void obj_to_page(unsigned long obj, struct page **page)
+static void obj_to_zsdesc(unsigned long obj, struct zsdesc **zsdesc)
 {
 	obj >>= OBJ_TAG_BITS;
-	*page = pfn_to_page(obj >> OBJ_INDEX_BITS);
+	*zsdesc = pfn_zsdesc(obj >> OBJ_INDEX_BITS);
 }
 
 /**
@@ -1593,7 +1593,7 @@ static void obj_free(int class_size, unsigned long obj)
 void zs_free(struct zs_pool *pool, unsigned long handle)
 {
 	struct zspage *zspage;
-	struct page *f_page;
+	struct zsdesc *f_zsdesc;
 	unsigned long obj;
 	struct size_class *class;
 	int fullness;
@@ -1607,8 +1607,8 @@ void zs_free(struct zs_pool *pool, unsigned long handle)
 	 */
 	spin_lock(&pool->lock);
 	obj = handle_to_obj(handle);
-	obj_to_page(obj, &f_page);
-	zspage = get_zspage(f_page);
+	obj_to_zsdesc(obj, &f_zsdesc);
+	zspage = get_zspage(zsdesc_page(f_zsdesc));
 	class = zspage_class(pool, zspage);
 
 	class_stat_dec(class, ZS_OBJS_INUSE, 1);
-- 
2.41.0