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From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
	linux-fsdevel@vger.kernel.org
Subject: [PATCH 02/12] buffer: Replace obvious uses of b_page with b_folio
Date: Thu, 15 Dec 2022 21:43:52 +0000	[thread overview]
Message-ID: <20221215214402.3522366-3-willy@infradead.org> (raw)
In-Reply-To: <20221215214402.3522366-1-willy@infradead.org>

These cases just check if it's NULL, or use b_page to get to the page's
address space.  They are assumptions that b_page never points to a
tail page.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 fs/buffer.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/fs/buffer.c b/fs/buffer.c
index d9c6d1fbb6dd..e1055fe0b366 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -321,7 +321,7 @@ static void end_buffer_async_read_io(struct buffer_head *bh, int uptodate)
 {
 	/* Decrypt if needed */
 	if (uptodate &&
-	    fscrypt_inode_uses_fs_layer_crypto(bh->b_page->mapping->host)) {
+	    fscrypt_inode_uses_fs_layer_crypto(bh->b_folio->mapping->host)) {
 		struct decrypt_bh_ctx *ctx = kmalloc(sizeof(*ctx), GFP_ATOMIC);
 
 		if (ctx) {
@@ -570,7 +570,7 @@ void write_boundary_block(struct block_device *bdev,
 void mark_buffer_dirty_inode(struct buffer_head *bh, struct inode *inode)
 {
 	struct address_space *mapping = inode->i_mapping;
-	struct address_space *buffer_mapping = bh->b_page->mapping;
+	struct address_space *buffer_mapping = bh->b_folio->mapping;
 
 	mark_buffer_dirty(bh);
 	if (!mapping->private_data) {
@@ -1073,7 +1073,7 @@ __getblk_slow(struct block_device *bdev, sector_t block,
  * and then attach the address_space's inode to its superblock's dirty
  * inode list.
  *
- * mark_buffer_dirty() is atomic.  It takes bh->b_page->mapping->private_lock,
+ * mark_buffer_dirty() is atomic.  It takes bh->b_folio->mapping->private_lock,
  * i_pages lock and mapping->host->i_lock.
  */
 void mark_buffer_dirty(struct buffer_head *bh)
@@ -1117,8 +1117,8 @@ void mark_buffer_write_io_error(struct buffer_head *bh)
 
 	set_buffer_write_io_error(bh);
 	/* FIXME: do we need to set this in both places? */
-	if (bh->b_page && bh->b_page->mapping)
-		mapping_set_error(bh->b_page->mapping, -EIO);
+	if (bh->b_folio && bh->b_folio->mapping)
+		mapping_set_error(bh->b_folio->mapping, -EIO);
 	if (bh->b_assoc_map)
 		mapping_set_error(bh->b_assoc_map, -EIO);
 	rcu_read_lock();
@@ -1154,7 +1154,7 @@ void __bforget(struct buffer_head *bh)
 {
 	clear_buffer_dirty(bh);
 	if (bh->b_assoc_map) {
-		struct address_space *buffer_mapping = bh->b_page->mapping;
+		struct address_space *buffer_mapping = bh->b_folio->mapping;
 
 		spin_lock(&buffer_mapping->private_lock);
 		list_del_init(&bh->b_assoc_buffers);
-- 
2.35.1


  parent reply	other threads:[~2022-12-15 21:44 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-12-15 21:43 [PATCH 00/12] Start converting buffer_heads to use folios Matthew Wilcox (Oracle)
2022-12-15 21:43 ` [PATCH 01/12] buffer: Add b_folio as an alias of b_page Matthew Wilcox (Oracle)
2022-12-15 21:43 ` Matthew Wilcox (Oracle) [this message]
2022-12-15 21:43 ` [PATCH 03/12] buffer: Use b_folio in touch_buffer() Matthew Wilcox (Oracle)
2022-12-15 21:43 ` [PATCH 04/12] buffer: Use b_folio in end_buffer_async_read() Matthew Wilcox (Oracle)
2022-12-15 21:43 ` [PATCH 05/12] buffer: Use b_folio in end_buffer_async_write() Matthew Wilcox (Oracle)
2022-12-15 21:43 ` [PATCH 06/12] page_io: Remove buffer_head include Matthew Wilcox (Oracle)
2022-12-15 21:43 ` [PATCH 07/12] buffer: Use b_folio in mark_buffer_dirty() Matthew Wilcox (Oracle)
2022-12-15 21:43 ` [PATCH 08/12] gfs2: Replace obvious uses of b_page with b_folio Matthew Wilcox (Oracle)
2022-12-15 21:43 ` [PATCH 09/12] jbd2: " Matthew Wilcox (Oracle)
2022-12-15 21:44 ` [PATCH 10/12] nilfs2: " Matthew Wilcox (Oracle)
2022-12-15 21:44 ` [PATCH 11/12] reiserfs: " Matthew Wilcox (Oracle)
2022-12-15 21:44 ` [PATCH 12/12] mpage: Use b_folio in do_mpage_readpage() Matthew Wilcox (Oracle)
2023-01-12 12:01 ` [PATCH 00/12] Start converting buffer_heads to use folios Jan Kara

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