linux-kernel - [PATCH 13/15] mm/z3fold: use zpdesc in z3fold_map/z3fold

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Date: Fri, 21 Jun 2024 13:46:53 +0800
From: alexs@...nel.org
To: Vitaly Wool <vitaly.wool@...sulko.com>,
	Miaohe Lin <linmiaohe@...wei.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	minchan@...nel.org,
	willy@...radead.org,
	senozhatsky@...omium.org,
	david@...hat.com,
	42.hyeyoo@...il.com
Cc: Alex Shi <alexs@...nel.org>
Subject: [PATCH 13/15] mm/z3fold: use zpdesc in z3fold_map/z3fold_unmap

From: Alex Shi <alexs@...nel.org>

Convert page to zpdesc in z3fold_map/z3fold_unmap pair, the main purpose
is doing page->private to zpdesc->zppage_flag conversion.

Signed-off-by: Alex Shi <alexs@...nel.org>
---
 mm/z3fold.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/mm/z3fold.c b/mm/z3fold.c
index 6283f90d1c22..7d95c0293664 100644
--- a/mm/z3fold.c
+++ b/mm/z3fold.c
@@ -1175,15 +1175,15 @@ static void z3fold_free(struct z3fold_pool *pool, unsigned long handle)
 static void *z3fold_map(struct z3fold_pool *pool, unsigned long handle)
 {
 	struct z3fold_header *zhdr;
-	struct page *page;
+	struct zpdesc *zpdesc;
 	void *addr;
 	enum buddy buddy;
 
 	zhdr = get_z3fold_header(handle);
 	addr = zhdr;
-	page = virt_to_page(zhdr);
+	zpdesc = page_zpdesc(virt_to_page(zhdr));
 
-	if (test_bit(PAGE_HEADLESS, &page->private))
+	if (test_bit(PAGE_HEADLESS, &zpdesc->zppage_flag))
 		goto out;
 
 	buddy = handle_to_buddy(handle);
@@ -1193,7 +1193,7 @@ static void *z3fold_map(struct z3fold_pool *pool, unsigned long handle)
 		break;
 	case MIDDLE:
 		addr += zhdr->start_middle << CHUNK_SHIFT;
-		set_bit(MIDDLE_CHUNK_MAPPED, &page->private);
+		set_bit(MIDDLE_CHUNK_MAPPED, &zpdesc->zppage_flag);
 		break;
 	case LAST:
 		addr += PAGE_SIZE - (handle_to_chunks(handle) << CHUNK_SHIFT);
@@ -1220,18 +1220,18 @@ static void *z3fold_map(struct z3fold_pool *pool, unsigned long handle)
 static void z3fold_unmap(struct z3fold_pool *pool, unsigned long handle)
 {
 	struct z3fold_header *zhdr;
-	struct page *page;
+	struct zpdesc *zpdesc;
 	enum buddy buddy;
 
 	zhdr = get_z3fold_header(handle);
-	page = virt_to_page(zhdr);
+	zpdesc = page_zpdesc(virt_to_page(zhdr));
 
-	if (test_bit(PAGE_HEADLESS, &page->private))
+	if (test_bit(PAGE_HEADLESS, &zpdesc->zppage_flag))
 		return;
 
 	buddy = handle_to_buddy(handle);
 	if (buddy == MIDDLE)
-		clear_bit(MIDDLE_CHUNK_MAPPED, &page->private);
+		clear_bit(MIDDLE_CHUNK_MAPPED, &zpdesc->zppage_flag);
 	zhdr->mapped_count--;
 	put_z3fold_header(zhdr);
 }
-- 
2.43.0