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Subject[17/41] Use page_cache_xxx in fs/ext4
Use page_cache_xxx in fs/ext4

Signed-off-by: Christoph Lameter <clameter@sgi.com>
---
fs/ext4/dir.c | 3 ++-
fs/ext4/inode.c | 31 ++++++++++++++++---------------
2 files changed, 18 insertions(+), 16 deletions(-)
Index: linux-2.6/fs/ext4/dir.c
===================================================================
--- linux-2.6.orig/fs/ext4/dir.c 2007-08-30 23:16:52.000000000 -0700
+++ linux-2.6/fs/ext4/dir.c 2007-08-30 23:17:33.000000000 -0700
@@ -136,7 +136,8 @@ static int ext4_readdir(struct file * fi
err = ext4_get_blocks_wrap(NULL, inode, blk, 1, &map_bh, 0, 0);
if (err > 0) {
pgoff_t index = map_bh.b_blocknr >>
- (PAGE_CACHE_SHIFT - inode->i_blkbits);
+ (page_cache_size(inode->i_mapping)
+ - inode->i_blkbits);
if (!ra_has_index(&filp->f_ra, index))
page_cache_sync_readahead(
sb->s_bdev->bd_inode->i_mapping,
Index: linux-2.6/fs/ext4/inode.c
===================================================================
--- linux-2.6.orig/fs/ext4/inode.c 2007-08-30 23:17:11.000000000 -0700
+++ linux-2.6/fs/ext4/inode.c 2007-08-30 23:17:11.000000000 -0700
@@ -1223,7 +1223,7 @@ static int ext4_ordered_commit_write(str
*/
loff_t new_i_size;

- new_i_size = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;
+ new_i_size = page_cache_pos(page->mapping, page->index, to);
if (new_i_size > EXT4_I(inode)->i_disksize)
EXT4_I(inode)->i_disksize = new_i_size;
ret = generic_commit_write(file, page, from, to);
@@ -1242,7 +1242,7 @@ static int ext4_writeback_commit_write(s
int ret = 0, ret2;
loff_t new_i_size;

- new_i_size = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;
+ new_i_size = page_cache_pos(page->mapping, page->index, to);
if (new_i_size > EXT4_I(inode)->i_disksize)
EXT4_I(inode)->i_disksize = new_i_size;

@@ -1269,7 +1269,7 @@ static int ext4_journalled_commit_write(
/*
* Here we duplicate the generic_commit_write() functionality
*/
- pos = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;
+ pos = page_cache_pos(page->mapping, page->index, to);

ret = walk_page_buffers(handle, page_buffers(page), from,
to, &partial, commit_write_fn);
@@ -1421,6 +1421,7 @@ static int ext4_ordered_writepage(struct
handle_t *handle = NULL;
int ret = 0;
int err;
+ int pagesize = page_cache_size(inode->i_mapping);

J_ASSERT(PageLocked(page));

@@ -1443,8 +1444,7 @@ static int ext4_ordered_writepage(struct
(1 << BH_Dirty)|(1 << BH_Uptodate));
}
page_bufs = page_buffers(page);
- walk_page_buffers(handle, page_bufs, 0,
- PAGE_CACHE_SIZE, NULL, bget_one);
+ walk_page_buffers(handle, page_bufs, 0, pagesize, NULL, bget_one);

ret = block_write_full_page(page, ext4_get_block, wbc);

@@ -1461,13 +1461,12 @@ static int ext4_ordered_writepage(struct
* and generally junk.
*/
if (ret == 0) {
- err = walk_page_buffers(handle, page_bufs, 0, PAGE_CACHE_SIZE,
+ err = walk_page_buffers(handle, page_bufs, 0, pagesize,
NULL, jbd2_journal_dirty_data_fn);
if (!ret)
ret = err;
}
- walk_page_buffers(handle, page_bufs, 0,
- PAGE_CACHE_SIZE, NULL, bput_one);
+ walk_page_buffers(handle, page_bufs, 0, pagesize, NULL, bput_one);
err = ext4_journal_stop(handle);
if (!ret)
ret = err;
@@ -1519,6 +1518,7 @@ static int ext4_journalled_writepage(str
handle_t *handle = NULL;
int ret = 0;
int err;
+ int pagesize = page_cache_size(inode->i_mapping);

if (ext4_journal_current_handle())
goto no_write;
@@ -1535,17 +1535,17 @@ static int ext4_journalled_writepage(str
* doesn't seem much point in redirtying the page here.
*/
ClearPageChecked(page);
- ret = block_prepare_write(page, 0, PAGE_CACHE_SIZE,
+ ret = block_prepare_write(page, 0, pagesize,
ext4_get_block);
if (ret != 0) {
ext4_journal_stop(handle);
goto out_unlock;
}
ret = walk_page_buffers(handle, page_buffers(page), 0,
- PAGE_CACHE_SIZE, NULL, do_journal_get_write_access);
+ pagesize, NULL, do_journal_get_write_access);

err = walk_page_buffers(handle, page_buffers(page), 0,
- PAGE_CACHE_SIZE, NULL, commit_write_fn);
+ pagesize, NULL, commit_write_fn);
if (ret == 0)
ret = err;
EXT4_I(inode)->i_state |= EXT4_STATE_JDATA;
@@ -1760,8 +1760,8 @@ void ext4_set_aops(struct inode *inode)
int ext4_block_truncate_page(handle_t *handle, struct page *page,
struct address_space *mapping, loff_t from)
{
- ext4_fsblk_t index = from >> PAGE_CACHE_SHIFT;
- unsigned offset = from & (PAGE_CACHE_SIZE-1);
+ ext4_fsblk_t index = page_cache_index(mapping, from);
+ unsigned offset = page_cache_offset(mapping, from);
unsigned blocksize, iblock, length, pos;
struct inode *inode = mapping->host;
struct buffer_head *bh;
@@ -1769,7 +1769,8 @@ int ext4_block_truncate_page(handle_t *h

blocksize = inode->i_sb->s_blocksize;
length = blocksize - (offset & (blocksize - 1));
- iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits);
+ iblock = index <<
+ (page_cache_shift(mapping) - inode->i_sb->s_blocksize_bits);

/*
* For "nobh" option, we can only work if we don't need to
@@ -2249,7 +2250,7 @@ void ext4_truncate(struct inode *inode)
page = NULL;
} else {
page = grab_cache_page(mapping,
- inode->i_size >> PAGE_CACHE_SHIFT);
+ page_cache_index(mapping, inode->i_size));
if (!page)
return;
}
--
-
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