linux-kernel - [PATCH 2/2] f2fs: clean up with {attach,detach}_page

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Date:   Mon, 10 Apr 2023 10:24:18 +0800
From:   Chao Yu <chao@...nel.org>
To:     jaegeuk@...nel.org
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, Chao Yu <chao@...nel.org>
Subject: [PATCH 2/2] f2fs: clean up with {attach,detach}_page_private()

No logic changes.

Signed-off-by: Chao Yu <chao@...nel.org>
---
 fs/f2fs/f2fs.h | 32 ++++++++------------------------
 1 file changed, 8 insertions(+), 24 deletions(-)

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index ec8387da7f74..c378aedcadea 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1416,11 +1416,8 @@ static inline bool page_private_##name(struct page *page) \
 #define PAGE_PRIVATE_SET_FUNC(name, flagname) \
 static inline void set_page_private_##name(struct page *page) \
 { \
-	if (!PagePrivate(page)) { \
-		get_page(page); \
-		SetPagePrivate(page); \
-		set_page_private(page, 0); \
-	} \
+	if (!PagePrivate(page)) \
+		attach_page_private(page, (void *)page->private); \
 	set_bit(PAGE_PRIVATE_NOT_POINTER, &page_private(page)); \
 	set_bit(PAGE_PRIVATE_##flagname, &page_private(page)); \
 }
@@ -1429,13 +1426,8 @@ static inline void set_page_private_##name(struct page *page) \
 static inline void clear_page_private_##name(struct page *page) \
 { \
 	clear_bit(PAGE_PRIVATE_##flagname, &page_private(page)); \
-	if (page_private(page) == BIT(PAGE_PRIVATE_NOT_POINTER)) { \
-		set_page_private(page, 0); \
-		if (PagePrivate(page)) { \
-			ClearPagePrivate(page); \
-			put_page(page); \
-		}\
-	} \
+	if (page_private(page) == BIT(PAGE_PRIVATE_NOT_POINTER)) \
+		detach_page_private(page); \
 }
 
 PAGE_PRIVATE_GET_FUNC(nonpointer, NOT_POINTER);
@@ -1464,11 +1456,8 @@ static inline unsigned long get_page_private_data(struct page *page)
 
 static inline void set_page_private_data(struct page *page, unsigned long data)
 {
-	if (!PagePrivate(page)) {
-		get_page(page);
-		SetPagePrivate(page);
-		set_page_private(page, 0);
-	}
+	if (!PagePrivate(page))
+		attach_page_private(page, 0);
 	set_bit(PAGE_PRIVATE_NOT_POINTER, &page_private(page));
 	page_private(page) |= data << PAGE_PRIVATE_MAX;
 }
@@ -1476,13 +1465,8 @@ static inline void set_page_private_data(struct page *page, unsigned long data)
 static inline void clear_page_private_data(struct page *page)
 {
 	page_private(page) &= GENMASK(PAGE_PRIVATE_MAX - 1, 0);
-	if (page_private(page) == BIT(PAGE_PRIVATE_NOT_POINTER)) {
-		set_page_private(page, 0);
-		if (PagePrivate(page)) {
-			ClearPagePrivate(page);
-			put_page(page);
-		}
-	}
+	if (page_private(page) == BIT(PAGE_PRIVATE_NOT_POINTER))
+		detach_page_private(page);
 }
 
 /* For compression */
-- 
2.25.1