linux-kernel - [PATCH 08/20] nilfs2: Convert to nilfs_clear_folio

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20231114084436.2755-9-konishi.ryusuke@gmail.com>
Date:   Tue, 14 Nov 2023 17:44:24 +0900
From:   Ryusuke Konishi <konishi.ryusuke@...il.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-nilfs@...r.kernel.org, Matthew Wilcox <willy@...radead.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 08/20] nilfs2: Convert to nilfs_clear_folio_dirty()

From: "Matthew Wilcox (Oracle)" <willy@...radead.org>

All callers of nilfs_clear_dirty_page() now have a folio, so rename
the function and pass in the folio.  Saves three hidden calls to
compound_head().

Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@...il.com>
---
 fs/nilfs2/inode.c |  2 +-
 fs/nilfs2/mdt.c   |  2 +-
 fs/nilfs2/page.c  | 27 ++++++++++++++-------------
 fs/nilfs2/page.h  |  2 +-
 4 files changed, 17 insertions(+), 16 deletions(-)

diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index c7ec56358a79..8fe784f62720 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -186,7 +186,7 @@ static int nilfs_writepage(struct page *page, struct writeback_control *wbc)
 		 * have dirty pages that try to be flushed in background.
 		 * So, here we simply discard this dirty page.
 		 */
-		nilfs_clear_dirty_page(page, false);
+		nilfs_clear_folio_dirty(folio, false);
 		folio_unlock(folio);
 		return -EROFS;
 	}
diff --git a/fs/nilfs2/mdt.c b/fs/nilfs2/mdt.c
index 327408512b86..2e7952ac2f67 100644
--- a/fs/nilfs2/mdt.c
+++ b/fs/nilfs2/mdt.c
@@ -411,7 +411,7 @@ nilfs_mdt_write_page(struct page *page, struct writeback_control *wbc)
 		 * have dirty folios that try to be flushed in background.
 		 * So, here we simply discard this dirty folio.
 		 */
-		nilfs_clear_dirty_page(page, false);
+		nilfs_clear_folio_dirty(folio, false);
 		folio_unlock(folio);
 		return -EROFS;
 	}
diff --git a/fs/nilfs2/page.c b/fs/nilfs2/page.c
index 29799a49c234..48a91ff059f5 100644
--- a/fs/nilfs2/page.c
+++ b/fs/nilfs2/page.c
@@ -379,7 +379,7 @@ void nilfs_clear_dirty_pages(struct address_space *mapping, bool silent)
 			 * was acquired.  Skip processing in that case.
 			 */
 			if (likely(folio->mapping == mapping))
-				nilfs_clear_dirty_page(&folio->page, silent);
+				nilfs_clear_folio_dirty(folio, silent);
 
 			folio_unlock(folio);
 		}
@@ -389,32 +389,33 @@ void nilfs_clear_dirty_pages(struct address_space *mapping, bool silent)
 }
 
 /**
- * nilfs_clear_dirty_page - discard dirty page
- * @page: dirty page that will be discarded
+ * nilfs_clear_folio_dirty - discard dirty folio
+ * @folio: dirty folio that will be discarded
  * @silent: suppress [true] or print [false] warning messages
  */
-void nilfs_clear_dirty_page(struct page *page, bool silent)
+void nilfs_clear_folio_dirty(struct folio *folio, bool silent)
 {
-	struct inode *inode = page->mapping->host;
+	struct inode *inode = folio->mapping->host;
 	struct super_block *sb = inode->i_sb;
+	struct buffer_head *bh, *head;
 
-	BUG_ON(!PageLocked(page));
+	BUG_ON(!folio_test_locked(folio));
 
 	if (!silent)
 		nilfs_warn(sb, "discard dirty page: offset=%lld, ino=%lu",
-			   page_offset(page), inode->i_ino);
+			   folio_pos(folio), inode->i_ino);
 
-	ClearPageUptodate(page);
-	ClearPageMappedToDisk(page);
+	folio_clear_uptodate(folio);
+	folio_clear_mappedtodisk(folio);
 
-	if (page_has_buffers(page)) {
-		struct buffer_head *bh, *head;
+	head = folio_buffers(folio);
+	if (head) {
 		const unsigned long clear_bits =
 			(BIT(BH_Uptodate) | BIT(BH_Dirty) | BIT(BH_Mapped) |
 			 BIT(BH_Async_Write) | BIT(BH_NILFS_Volatile) |
 			 BIT(BH_NILFS_Checked) | BIT(BH_NILFS_Redirected));
 
-		bh = head = page_buffers(page);
+		bh = head;
 		do {
 			lock_buffer(bh);
 			if (!silent)
@@ -427,7 +428,7 @@ void nilfs_clear_dirty_page(struct page *page, bool silent)
 		} while (bh = bh->b_this_page, bh != head);
 	}
 
-	__nilfs_clear_page_dirty(page);
+	__nilfs_clear_page_dirty(&folio->page);
 }
 
 unsigned int nilfs_page_count_clean_buffers(struct page *page,
diff --git a/fs/nilfs2/page.h b/fs/nilfs2/page.h
index a8ab800e689c..c419bb1f5b7d 100644
--- a/fs/nilfs2/page.h
+++ b/fs/nilfs2/page.h
@@ -41,7 +41,7 @@ void nilfs_page_bug(struct page *);
 
 int nilfs_copy_dirty_pages(struct address_space *, struct address_space *);
 void nilfs_copy_back_pages(struct address_space *, struct address_space *);
-void nilfs_clear_dirty_page(struct page *, bool);
+void nilfs_clear_folio_dirty(struct folio *, bool);
 void nilfs_clear_dirty_pages(struct address_space *, bool);
 unsigned int nilfs_page_count_clean_buffers(struct page *, unsigned int,
 					    unsigned int);
-- 
2.34.1