Use page_cache_xxx in fs/ext4
Reviewed-by: Dave Chinner <dgc@xxxxxxx>
Signed-off-by: Christoph Lameter <clameter@xxxxxxx>
---
fs/ext4/dir.c | 3 ++-
fs/ext4/inode.c | 34 +++++++++++++++++-----------------
2 files changed, 19 insertions(+), 18 deletions(-)
Index: linux-2.6/fs/ext4/dir.c
===================================================================
--- linux-2.6.orig/fs/ext4/dir.c 2008-02-14 15:19:11.993504338 -0800
+++ linux-2.6/fs/ext4/dir.c 2008-02-15 16:15:16.385202022 -0800
@@ -132,7 +132,8 @@ 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 2008-02-14 15:19:12.005504520 -0800
+++ linux-2.6/fs/ext4/inode.c 2008-02-15 16:15:16.389202066 -0800
@@ -1142,8 +1142,8 @@ static int ext4_write_begin(struct file
pgoff_t index;
unsigned from, to;
- index = pos >> PAGE_CACHE_SHIFT;
- from = pos & (PAGE_CACHE_SIZE - 1);
+ index = page_cache_index(mapping, pos);
+ from = page_cache_offset(mapping, pos);
to = from + len;
retry:
@@ -1238,7 +1238,7 @@ static int ext4_ordered_write_end(struct
unsigned from, to;
int ret = 0, ret2;
- from = pos & (PAGE_CACHE_SIZE - 1);
+ from = page_cache_offset(mapping, pos);
to = from + len;
ret = walk_page_buffers(handle, page_buffers(page),
@@ -1308,7 +1308,7 @@ static int ext4_journalled_write_end(str
int partial = 0;
unsigned from, to;
- from = pos & (PAGE_CACHE_SIZE - 1);
+ from = page_cache_offset(mapping, pos);
to = from + len;
if (copied < len) {
@@ -1471,6 +1471,7 @@ 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));
@@ -1493,8 +1494,7 @@ 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);
@@ -1511,13 +1511,12 @@ 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;
@@ -1569,6 +1568,7 @@ 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;
@@ -1585,17 +1585,16 @@ 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,
- ext4_get_block);
+ 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, write_end_fn);
+ pagesize, NULL, write_end_fn);
if (ret == 0)
ret = err;
EXT4_I(inode)->i_state |= EXT4_STATE_JDATA;
@@ -1818,8 +1817,8 @@ 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, length, pos;
ext4_lblk_t iblock;
struct inode *inode = mapping->host;
@@ -1828,7 +1827,8 @@ 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
@@ -2308,7 +2308,7 @@ 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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