[PATCH] add page->mapping handling interface [13/35] changes inEXT4
From: KAMEZAWA Hiroyuki
Date: Mon Sep 10 2007 - 05:59:05 EST
Changes page->mapping handling in EXT4
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
---
fs/ext4/inode.c | 10 +++++-----
fs/ext4/writeback.c | 24 ++++++++++++------------
2 files changed, 17 insertions(+), 17 deletions(-)
Index: test-2.6.23-rc4-mm1/fs/ext4/inode.c
===================================================================
--- test-2.6.23-rc4-mm1.orig/fs/ext4/inode.c
+++ test-2.6.23-rc4-mm1/fs/ext4/inode.c
@@ -1482,7 +1482,7 @@ static int jbd2_journal_dirty_data_fn(ha
static int ext4_ordered_writepage(struct page *page,
struct writeback_control *wbc)
{
- struct inode *inode = page->mapping->host;
+ struct inode *inode = page_inode(page);
struct buffer_head *page_bufs;
handle_t *handle = NULL;
int ret = 0;
@@ -1548,7 +1548,7 @@ out_fail:
static int ext4_writeback_writepage(struct page *page,
struct writeback_control *wbc)
{
- struct inode *inode = page->mapping->host;
+ struct inode *inode = page_inode(page);
handle_t *handle = NULL;
int ret = 0;
int err;
@@ -1581,7 +1581,7 @@ out_fail:
static int ext4_journalled_writepage(struct page *page,
struct writeback_control *wbc)
{
- struct inode *inode = page->mapping->host;
+ struct inode *inode = page_inode(page);
handle_t *handle = NULL;
int ret = 0;
int err;
@@ -1651,7 +1651,7 @@ ext4_readpages(struct file *file, struct
static void ext4_invalidatepage(struct page *page, unsigned long offset)
{
- journal_t *journal = EXT4_JOURNAL(page->mapping->host);
+ journal_t *journal = EXT4_JOURNAL(page_inode(page));
/*
* If it's a full truncate we just forget about the pending dirtying
@@ -1664,7 +1664,7 @@ static void ext4_invalidatepage(struct p
static int ext4_releasepage(struct page *page, gfp_t wait)
{
- journal_t *journal = EXT4_JOURNAL(page->mapping->host);
+ journal_t *journal = EXT4_JOURNAL(page_inode(page));
WARN_ON(PageChecked(page));
if (!page_has_buffers(page))
Index: test-2.6.23-rc4-mm1/fs/ext4/writeback.c
===================================================================
--- test-2.6.23-rc4-mm1.orig/fs/ext4/writeback.c
+++ test-2.6.23-rc4-mm1/fs/ext4/writeback.c
@@ -175,7 +175,7 @@ static struct bio *ext4_wb_bio_submit(st
int inline ext4_wb_reserve_space_page(struct page *page, int blocks)
{
- struct inode *inode = page->mapping->host;
+ struct inode *inode = page_inode(page);
int total, mdb, err;
wb_debug("reserve %d blocks for page %lu from inode %lu\n",
@@ -263,7 +263,7 @@ static inline int ext4_wb_drop_page_rese
* reserved blocks. we could release reserved blocks right
* now, but I'd prefer to make this once per several blocks */
wb_debug("drop reservation from page %lu from inode %lu\n",
- page->index, page->mapping->host->i_ino);
+ page->index, page_inode(page)->i_ino);
BUG_ON(!PageBooked(page));
ClearPageBooked(page);
return 0;
@@ -711,7 +711,7 @@ int ext4_wb_writepages(struct address_sp
if (wbc->sync_mode != WB_SYNC_NONE)
wait_on_page_writeback(page);
- if (page->mapping != mapping) {
+ if (pagecache_consistent(page, mapping)) {
unlock_page(page);
continue;
}
@@ -853,12 +853,12 @@ static void ext4_wb_clear_page(struct pa
int ext4_wb_prepare_write(struct file *file, struct page *page,
unsigned from, unsigned to)
{
- struct inode *inode = page->mapping->host;
+ struct inode *inode = page_inode(page);
struct buffer_head bh, *bhw = &bh;
int err = 0;
wb_debug("prepare page %lu (%u-%u) for inode %lu\n",
- page->index, from, to, page->mapping->host->i_ino);
+ page->index, from, to, page_inode(page)->i_ino);
/* if page is uptodate this means that ->prepare_write() has
* been called on page before and page is mapped to disk or
@@ -912,7 +912,7 @@ int ext4_wb_commit_write(struct file *fi
unsigned from, unsigned to)
{
loff_t pos = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;
- struct inode *inode = page->mapping->host;
+ struct inode *inode = page_inode(page);
int err = 0;
wb_debug("commit page %lu (%u-%u) for inode %lu\n",
@@ -952,7 +952,7 @@ int ext4_wb_commit_write(struct file *fi
int ext4_wb_write_single_page(struct page *page,
struct writeback_control *wbc)
{
- struct inode *inode = page->mapping->host;
+ struct inode *inode = page_inode(page);
struct ext4_wb_control wc;
int err;
@@ -964,7 +964,7 @@ int ext4_wb_write_single_page(struct pag
atomic_inc(&EXT4_SB(inode->i_sb)->s_wb_collisions_sp);
#endif
- ext4_wb_init_control(&wc, page->mapping);
+ ext4_wb_init_control(&wc, page_mapping_cache(page));
BUG_ON(PageWriteback(page));
set_page_writeback(page);
@@ -988,7 +988,7 @@ int ext4_wb_write_single_page(struct pag
int ext4_wb_writepage(struct page *page, struct writeback_control *wbc)
{
- struct inode *inode = page->mapping->host;
+ struct inode *inode = page_inode(page);
loff_t i_size = i_size_read(inode);
pgoff_t end_index = i_size >> PAGE_CACHE_SHIFT;
unsigned offset;
@@ -1002,7 +1002,7 @@ int ext4_wb_writepage(struct page *page,
* hasn't space on a disk yet, leave it for that thread
*/
#if 1
- if (atomic_read(&EXT4_I(page->mapping->host)->i_wb_writers)
+ if (atomic_read(&EXT4_I(page_inode(page))->i_wb_writers)
&& !PageMappedToDisk(page)) {
__set_page_dirty_nobuffers(page);
unlock_page(page);
@@ -1054,7 +1054,7 @@ int ext4_wb_releasepage(struct page *pag
wb_debug("release %sM%sR page %lu from inode %lu (wait %d)\n",
PageMappedToDisk(page) ? "" : "!",
PageBooked(page) ? "" : "!",
- page->index, page->mapping->host->i_ino, wait);
+ page->index, page_inode(page)->i_ino, wait);
if (PageWriteback(page))
return 0;
@@ -1066,7 +1066,7 @@ int ext4_wb_releasepage(struct page *pag
void ext4_wb_invalidatepage(struct page *page, unsigned long offset)
{
- struct inode *inode = page->mapping->host;
+ struct inode *inode = page_inode(page);
int ret = 0;
/* ->invalidatepage() is called when page is marked Private.
-
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