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buffer: replace obvious uses of b_page with b_folio 

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.

Link: https://lkml.kernel.org/r/20221215214402.3522366-3-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2022-12-15 21:43:52 +00:00 коммит произвёл Andrew Morton
Родитель d685c668b0
Коммит abc8a8a2c7
1 изменённых файлов: 6 добавлений и 6 удалений
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12
fs/buffer.c
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@ -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);