[PATCH 33/71] ext4: get rid of PAGE_CACHE_* and page_cache_{get,release} macros

From: Kirill A. Shutemov
Date: Sun Mar 20 2016 - 14:54:07 EST

PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time ago
with promise that one day it will be possible to implement page cache with
bigger chunks than PAGE_SIZE.

This promise never materialized. And unlikely will.

We have many places where PAGE_CACHE_SIZE assumed to be equal to
PAGE_SIZE. And it's constant source of confusion on whether PAGE_CACHE_*
or PAGE_* constant should be used in a particular case, especially on the
border between fs and mm.

Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much
breakage to be doable.

Let's stop pretending that pages in page cache are special. They are not.

The changes are pretty straight-forward:

- <foo> << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;

- PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN};

- page_cache_get() -> get_page();

- page_cache_release() -> put_page();

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: "Theodore Ts'o" <tytso@xxxxxxx>
Cc: Andreas Dilger <adilger.kernel@xxxxxxxxx>
---
fs/ext4/crypto.c | 8 ++--
fs/ext4/dir.c | 4 +-
fs/ext4/ext4.h | 4 +-
fs/ext4/file.c | 4 +-
fs/ext4/inline.c | 18 ++++----
fs/ext4/inode.c | 118 +++++++++++++++++++++++++-------------------------
fs/ext4/mballoc.c | 40 ++++++++---------
fs/ext4/move_extent.c | 16 +++----
fs/ext4/page-io.c | 4 +-
fs/ext4/readpage.c | 12 ++---
fs/ext4/super.c | 4 +-
fs/ext4/symlink.c | 4 +-
12 files changed, 118 insertions(+), 118 deletions(-)

diff --git a/fs/ext4/crypto.c b/fs/ext4/crypto.c
index edc053a81914..2580ef3346ca 100644
--- a/fs/ext4/crypto.c
+++ b/fs/ext4/crypto.c
@@ -283,10 +283,10 @@ static int ext4_page_crypto(struct inode *inode,
EXT4_XTS_TWEAK_SIZE - sizeof(index));

sg_init_table(&dst, 1);
- sg_set_page(&dst, dest_page, PAGE_CACHE_SIZE, 0);
+ sg_set_page(&dst, dest_page, PAGE_SIZE, 0);
sg_init_table(&src, 1);
- sg_set_page(&src, src_page, PAGE_CACHE_SIZE, 0);
- skcipher_request_set_crypt(req, &src, &dst, PAGE_CACHE_SIZE,
+ sg_set_page(&src, src_page, PAGE_SIZE, 0);
+ skcipher_request_set_crypt(req, &src, &dst, PAGE_SIZE,
xts_tweak);
if (rw == EXT4_DECRYPT)
res = crypto_skcipher_decrypt(req);
@@ -396,7 +396,7 @@ int ext4_encrypted_zeroout(struct inode *inode, ext4_lblk_t lblk,
(unsigned long) inode->i_ino, lblk, len);
#endif

- BUG_ON(inode->i_sb->s_blocksize != PAGE_CACHE_SIZE);
+ BUG_ON(inode->i_sb->s_blocksize != PAGE_SIZE);

ctx = ext4_get_crypto_ctx(inode);
if (IS_ERR(ctx))
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index 33f5e2a50cf8..a887efeb7027 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -155,13 +155,13 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx)
err = ext4_map_blocks(NULL, inode, &map, 0);
if (err > 0) {
pgoff_t index = map.m_pblk >>
- (PAGE_CACHE_SHIFT - inode->i_blkbits);
+ (PAGE_SHIFT - inode->i_blkbits);
if (!ra_has_index(&file->f_ra, index))
page_cache_sync_readahead(
sb->s_bdev->bd_inode->i_mapping,
&file->f_ra, file,
index, 1);
- file->f_ra.prev_pos = (loff_t)index << PAGE_CACHE_SHIFT;
+ file->f_ra.prev_pos = (loff_t)index << PAGE_SHIFT;
bh = ext4_bread(NULL, inode, map.m_lblk, 0);
if (IS_ERR(bh)) {
err = PTR_ERR(bh);
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 393689dfa1af..d96ec1dd22a9 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1970,7 +1970,7 @@ ext4_rec_len_from_disk(__le16 dlen, unsigned blocksize)
{
unsigned len = le16_to_cpu(dlen);

-#if (PAGE_CACHE_SIZE >= 65536)
+#if (PAGE_SIZE >= 65536)
if (len == EXT4_MAX_REC_LEN || len == 0)
return blocksize;
return (len & 65532) | ((len & 3) << 16);
@@ -1983,7 +1983,7 @@ static inline __le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize)
{
if ((len > blocksize) || (blocksize > (1 << 18)) || (len & 3))
BUG();
-#if (PAGE_CACHE_SIZE >= 65536)
+#if (PAGE_SIZE >= 65536)
if (len < 65536)
return cpu_to_le16(len);
if (len == blocksize) {
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 6659e216385e..0caece398eb8 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -428,8 +428,8 @@ static int ext4_find_unwritten_pgoff(struct inode *inode,
lastoff = startoff;
endoff = (loff_t)end_blk << blkbits;

- index = startoff >> PAGE_CACHE_SHIFT;
- end = endoff >> PAGE_CACHE_SHIFT;
+ index = startoff >> PAGE_SHIFT;
+ end = endoff >> PAGE_SHIFT;

pagevec_init(&pvec, 0);
do {
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index 7cbdd3752ba5..7bc6c855cc18 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -482,7 +482,7 @@ static int ext4_read_inline_page(struct inode *inode, struct page *page)
ret = ext4_read_inline_data(inode, kaddr, len, &iloc);
flush_dcache_page(page);
kunmap_atomic(kaddr);
- zero_user_segment(page, len, PAGE_CACHE_SIZE);
+ zero_user_segment(page, len, PAGE_SIZE);
SetPageUptodate(page);
brelse(iloc.bh);

@@ -507,7 +507,7 @@ int ext4_readpage_inline(struct inode *inode, struct page *page)
if (!page->index)
ret = ext4_read_inline_page(inode, page);
else if (!PageUptodate(page)) {
- zero_user_segment(page, 0, PAGE_CACHE_SIZE);
+ zero_user_segment(page, 0, PAGE_SIZE);
SetPageUptodate(page);
}

@@ -595,7 +595,7 @@ retry:

if (ret) {
unlock_page(page);
- page_cache_release(page);
+ put_page(page);
page = NULL;
ext4_orphan_add(handle, inode);
up_write(&EXT4_I(inode)->xattr_sem);
@@ -621,7 +621,7 @@ retry:
out:
if (page) {
unlock_page(page);
- page_cache_release(page);
+ put_page(page);
}
if (sem_held)
up_write(&EXT4_I(inode)->xattr_sem);
@@ -690,7 +690,7 @@ int ext4_try_to_write_inline_data(struct address_space *mapping,
if (!ext4_has_inline_data(inode)) {
ret = 0;
unlock_page(page);
- page_cache_release(page);
+ put_page(page);
goto out_up_read;
}

@@ -815,7 +815,7 @@ static int ext4_da_convert_inline_data_to_extent(struct address_space *mapping,
if (ret) {
up_read(&EXT4_I(inode)->xattr_sem);
unlock_page(page);
- page_cache_release(page);
+ put_page(page);
ext4_truncate_failed_write(inode);
return ret;
}
@@ -829,7 +829,7 @@ out:
up_read(&EXT4_I(inode)->xattr_sem);
if (page) {
unlock_page(page);
- page_cache_release(page);
+ put_page(page);
}
return ret;
}
@@ -919,7 +919,7 @@ retry_journal:
out_release_page:
up_read(&EXT4_I(inode)->xattr_sem);
unlock_page(page);
- page_cache_release(page);
+ put_page(page);
out_journal:
ext4_journal_stop(handle);
out:
@@ -947,7 +947,7 @@ int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos,
i_size_changed = 1;
}
unlock_page(page);
- page_cache_release(page);
+ put_page(page);

/*
* Don't mark the inode dirty under page lock. First, it unnecessarily
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index b2e9576450eb..58ec44be2f42 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1057,7 +1057,7 @@ int do_journal_get_write_access(handle_t *handle,
static int ext4_block_write_begin(struct page *page, loff_t pos, unsigned len,
get_block_t *get_block)
{
- unsigned from = pos & (PAGE_CACHE_SIZE - 1);
+ unsigned from = pos & (PAGE_SIZE - 1);
unsigned to = from + len;
struct inode *inode = page->mapping->host;
unsigned block_start, block_end;
@@ -1069,15 +1069,15 @@ static int ext4_block_write_begin(struct page *page, loff_t pos, unsigned len,
bool decrypt = false;

BUG_ON(!PageLocked(page));
- BUG_ON(from > PAGE_CACHE_SIZE);
- BUG_ON(to > PAGE_CACHE_SIZE);
+ BUG_ON(from > PAGE_SIZE);
+ BUG_ON(to > PAGE_SIZE);
BUG_ON(from > to);

if (!page_has_buffers(page))
create_empty_buffers(page, blocksize, 0);
head = page_buffers(page);
bbits = ilog2(blocksize);
- block = (sector_t)page->index << (PAGE_CACHE_SHIFT - bbits);
+ block = (sector_t)page->index << (PAGE_SHIFT - bbits);

for (bh = head, block_start = 0; bh != head || !block_start;
block++, block_start = block_end, bh = bh->b_this_page) {
@@ -1159,8 +1159,8 @@ static int ext4_write_begin(struct file *file, struct address_space *mapping,
* we allocate blocks but write fails for some reason
*/
needed_blocks = ext4_writepage_trans_blocks(inode) + 1;
- index = pos >> PAGE_CACHE_SHIFT;
- from = pos & (PAGE_CACHE_SIZE - 1);
+ index = pos >> PAGE_SHIFT;
+ from = pos & (PAGE_SIZE - 1);
to = from + len;

if (ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) {
@@ -1188,7 +1188,7 @@ retry_grab:
retry_journal:
handle = ext4_journal_start(inode, EXT4_HT_WRITE_PAGE, needed_blocks);
if (IS_ERR(handle)) {
- page_cache_release(page);
+ put_page(page);
return PTR_ERR(handle);
}

@@ -1196,7 +1196,7 @@ retry_journal:
if (page->mapping != mapping) {
/* The page got truncated from under us */
unlock_page(page);
- page_cache_release(page);
+ put_page(page);
ext4_journal_stop(handle);
goto retry_grab;
}
@@ -1252,7 +1252,7 @@ retry_journal:
if (ret == -ENOSPC &&
ext4_should_retry_alloc(inode->i_sb, &retries))
goto retry_journal;
- page_cache_release(page);
+ put_page(page);
return ret;
}
*pagep = page;
@@ -1295,7 +1295,7 @@ static int ext4_write_end(struct file *file,
ret = ext4_jbd2_file_inode(handle, inode);
if (ret) {
unlock_page(page);
- page_cache_release(page);
+ put_page(page);
goto errout;
}
}
@@ -1315,7 +1315,7 @@ static int ext4_write_end(struct file *file,
*/
i_size_changed = ext4_update_inode_size(inode, pos + copied);
unlock_page(page);
- page_cache_release(page);
+ put_page(page);

if (old_size < pos)
pagecache_isize_extended(inode, old_size, pos);
@@ -1399,7 +1399,7 @@ static int ext4_journalled_write_end(struct file *file,
int size_changed = 0;

trace_ext4_journalled_write_end(inode, pos, len, copied);
- from = pos & (PAGE_CACHE_SIZE - 1);
+ from = pos & (PAGE_SIZE - 1);
to = from + len;

BUG_ON(!ext4_handle_valid(handle));
@@ -1423,7 +1423,7 @@ static int ext4_journalled_write_end(struct file *file,
ext4_set_inode_state(inode, EXT4_STATE_JDATA);
EXT4_I(inode)->i_datasync_tid = handle->h_transaction->t_tid;
unlock_page(page);
- page_cache_release(page);
+ put_page(page);

if (old_size < pos)
pagecache_isize_extended(inode, old_size, pos);
@@ -1537,7 +1537,7 @@ static void ext4_da_page_release_reservation(struct page *page,
int num_clusters;
ext4_fsblk_t lblk;

- BUG_ON(stop > PAGE_CACHE_SIZE || stop < length);
+ BUG_ON(stop > PAGE_SIZE || stop < length);

head = page_buffers(page);
bh = head;
@@ -1553,7 +1553,7 @@ static void ext4_da_page_release_reservation(struct page *page,
clear_buffer_delay(bh);
} else if (contiguous_blks) {
lblk = page->index <<
- (PAGE_CACHE_SHIFT - inode->i_blkbits);
+ (PAGE_SHIFT - inode->i_blkbits);
lblk += (curr_off >> inode->i_blkbits) -
contiguous_blks;
ext4_es_remove_extent(inode, lblk, contiguous_blks);
@@ -1563,7 +1563,7 @@ static void ext4_da_page_release_reservation(struct page *page,
} while ((bh = bh->b_this_page) != head);

if (contiguous_blks) {
- lblk = page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits);
+ lblk = page->index << (PAGE_SHIFT - inode->i_blkbits);
lblk += (curr_off >> inode->i_blkbits) - contiguous_blks;
ext4_es_remove_extent(inode, lblk, contiguous_blks);
}
@@ -1572,7 +1572,7 @@ static void ext4_da_page_release_reservation(struct page *page,
* need to release the reserved space for that cluster. */
num_clusters = EXT4_NUM_B2C(sbi, to_release);
while (num_clusters > 0) {
- lblk = (page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits)) +
+ lblk = (page->index << (PAGE_SHIFT - inode->i_blkbits)) +
((num_clusters - 1) << sbi->s_cluster_bits);
if (sbi->s_cluster_ratio == 1 ||
!ext4_find_delalloc_cluster(inode, lblk))
@@ -1619,8 +1619,8 @@ static void mpage_release_unused_pages(struct mpage_da_data *mpd,
end = mpd->next_page - 1;
if (invalidate) {
ext4_lblk_t start, last;
- start = index << (PAGE_CACHE_SHIFT - inode->i_blkbits);
- last = end << (PAGE_CACHE_SHIFT - inode->i_blkbits);
+ start = index << (PAGE_SHIFT - inode->i_blkbits);
+ last = end << (PAGE_SHIFT - inode->i_blkbits);
ext4_es_remove_extent(inode, start, last - start + 1);
}

@@ -1636,7 +1636,7 @@ static void mpage_release_unused_pages(struct mpage_da_data *mpd,
BUG_ON(!PageLocked(page));
BUG_ON(PageWriteback(page));
if (invalidate) {
- block_invalidatepage(page, 0, PAGE_CACHE_SIZE);
+ block_invalidatepage(page, 0, PAGE_SIZE);
ClearPageUptodate(page);
}
unlock_page(page);
@@ -2007,10 +2007,10 @@ static int ext4_writepage(struct page *page,

trace_ext4_writepage(page);
size = i_size_read(inode);
- if (page->index == size >> PAGE_CACHE_SHIFT)
- len = size & ~PAGE_CACHE_MASK;
+ if (page->index == size >> PAGE_SHIFT)
+ len = size & ~PAGE_MASK;
else
- len = PAGE_CACHE_SIZE;
+ len = PAGE_SIZE;

page_bufs = page_buffers(page);
/*
@@ -2034,7 +2034,7 @@ static int ext4_writepage(struct page *page,
ext4_bh_delay_or_unwritten)) {
redirty_page_for_writepage(wbc, page);
if ((current->flags & PF_MEMALLOC) ||
- (inode->i_sb->s_blocksize == PAGE_CACHE_SIZE)) {
+ (inode->i_sb->s_blocksize == PAGE_SIZE)) {
/*
* For memory cleaning there's no point in writing only
* some buffers. So just bail out. Warn if we came here
@@ -2076,10 +2076,10 @@ static int mpage_submit_page(struct mpage_da_data *mpd, struct page *page)
int err;

BUG_ON(page->index != mpd->first_page);
- if (page->index == size >> PAGE_CACHE_SHIFT)
- len = size & ~PAGE_CACHE_MASK;
+ if (page->index == size >> PAGE_SHIFT)
+ len = size & ~PAGE_MASK;
else
- len = PAGE_CACHE_SIZE;
+ len = PAGE_SIZE;
clear_page_dirty_for_io(page);
err = ext4_bio_write_page(&mpd->io_submit, page, len, mpd->wbc, false);
if (!err)
@@ -2213,7 +2213,7 @@ static int mpage_map_and_submit_buffers(struct mpage_da_data *mpd)
int nr_pages, i;
struct inode *inode = mpd->inode;
struct buffer_head *head, *bh;
- int bpp_bits = PAGE_CACHE_SHIFT - inode->i_blkbits;
+ int bpp_bits = PAGE_SHIFT - inode->i_blkbits;
pgoff_t start, end;
ext4_lblk_t lblk;
sector_t pblock;
@@ -2274,7 +2274,7 @@ static int mpage_map_and_submit_buffers(struct mpage_da_data *mpd)
* supports blocksize < pagesize as we will try to
* convert potentially unmapped parts of inode.
*/
- mpd->io_submit.io_end->size += PAGE_CACHE_SIZE;
+ mpd->io_submit.io_end->size += PAGE_SIZE;
/* Page fully mapped - let IO run! */
err = mpage_submit_page(mpd, page);
if (err < 0) {
@@ -2426,7 +2426,7 @@ update_disksize:
* Update on-disk size after IO is submitted. Races with
* truncate are avoided by checking i_size under i_data_sem.
*/
- disksize = ((loff_t)mpd->first_page) << PAGE_CACHE_SHIFT;
+ disksize = ((loff_t)mpd->first_page) << PAGE_SHIFT;
if (disksize > EXT4_I(inode)->i_disksize) {
int err2;
loff_t i_size;
@@ -2562,7 +2562,7 @@ static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd)
mpd->next_page = page->index + 1;
/* Add all dirty buffers to mpd */
lblk = ((ext4_lblk_t)page->index) <<
- (PAGE_CACHE_SHIFT - blkbits);
+ (PAGE_SHIFT - blkbits);
head = page_buffers(page);
err = mpage_process_page_bufs(mpd, head, head, lblk);
if (err <= 0)
@@ -2647,7 +2647,7 @@ static int ext4_writepages(struct address_space *mapping,
* We may need to convert up to one extent per block in
* the page and we may dirty the inode.
*/
- rsv_blocks = 1 + (PAGE_CACHE_SIZE >> inode->i_blkbits);
+ rsv_blocks = 1 + (PAGE_SIZE >> inode->i_blkbits);
}

/*
@@ -2678,8 +2678,8 @@ static int ext4_writepages(struct address_space *mapping,
mpd.first_page = writeback_index;
mpd.last_page = -1;
} else {
- mpd.first_page = wbc->range_start >> PAGE_CACHE_SHIFT;
- mpd.last_page = wbc->range_end >> PAGE_CACHE_SHIFT;
+ mpd.first_page = wbc->range_start >> PAGE_SHIFT;
+ mpd.last_page = wbc->range_end >> PAGE_SHIFT;
}

mpd.inode = inode;
@@ -2838,7 +2838,7 @@ static int ext4_da_write_begin(struct file *file, struct address_space *mapping,
struct inode *inode = mapping->host;
handle_t *handle;

- index = pos >> PAGE_CACHE_SHIFT;
+ index = pos >> PAGE_SHIFT;

if (ext4_nonda_switch(inode->i_sb)) {
*fsdata = (void *)FALL_BACK_TO_NONDELALLOC;
@@ -2881,7 +2881,7 @@ retry_journal:
handle = ext4_journal_start(inode, EXT4_HT_WRITE_PAGE,
ext4_da_write_credits(inode, pos, len));
if (IS_ERR(handle)) {
- page_cache_release(page);
+ put_page(page);
return PTR_ERR(handle);
}

@@ -2889,7 +2889,7 @@ retry_journal:
if (page->mapping != mapping) {
/* The page got truncated from under us */
unlock_page(page);
- page_cache_release(page);
+ put_page(page);
ext4_journal_stop(handle);
goto retry_grab;
}
@@ -2917,7 +2917,7 @@ retry_journal:
ext4_should_retry_alloc(inode->i_sb, &retries))
goto retry_journal;

- page_cache_release(page);
+ put_page(page);
return ret;
}

@@ -2965,7 +2965,7 @@ static int ext4_da_write_end(struct file *file,
len, copied, page, fsdata);

trace_ext4_da_write_end(inode, pos, len, copied);
- start = pos & (PAGE_CACHE_SIZE - 1);
+ start = pos & (PAGE_SIZE - 1);
end = start + copied - 1;

/*
@@ -3187,7 +3187,7 @@ static int __ext4_journalled_invalidatepage(struct page *page,
/*
* If it's a full truncate we just forget about the pending dirtying
*/
- if (offset == 0 && length == PAGE_CACHE_SIZE)
+ if (offset == 0 && length == PAGE_SIZE)
ClearPageChecked(page);

return jbd2_journal_invalidatepage(journal, page, offset, length);
@@ -3546,8 +3546,8 @@ void ext4_set_aops(struct inode *inode)
static int __ext4_block_zero_page_range(handle_t *handle,
struct address_space *mapping, loff_t from, loff_t length)
{
- ext4_fsblk_t index = from >> PAGE_CACHE_SHIFT;
- unsigned offset = from & (PAGE_CACHE_SIZE-1);
+ ext4_fsblk_t index = from >> PAGE_SHIFT;
+ unsigned offset = from & (PAGE_SIZE-1);
unsigned blocksize, pos;
ext4_lblk_t iblock;
struct inode *inode = mapping->host;
@@ -3555,14 +3555,14 @@ static int __ext4_block_zero_page_range(handle_t *handle,
struct page *page;
int err = 0;

- page = find_or_create_page(mapping, from >> PAGE_CACHE_SHIFT,
+ page = find_or_create_page(mapping, from >> PAGE_SHIFT,
mapping_gfp_constraint(mapping, ~__GFP_FS));
if (!page)
return -ENOMEM;

blocksize = inode->i_sb->s_blocksize;

- iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits);
+ iblock = index << (PAGE_SHIFT - inode->i_sb->s_blocksize_bits);

if (!page_has_buffers(page))
create_empty_buffers(page, blocksize, 0);
@@ -3604,7 +3604,7 @@ static int __ext4_block_zero_page_range(handle_t *handle,
ext4_encrypted_inode(inode)) {
/* We expect the key to be set. */
BUG_ON(!ext4_has_encryption_key(inode));
- BUG_ON(blocksize != PAGE_CACHE_SIZE);
+ BUG_ON(blocksize != PAGE_SIZE);
WARN_ON_ONCE(ext4_decrypt(page));
}
}
@@ -3628,7 +3628,7 @@ static int __ext4_block_zero_page_range(handle_t *handle,

unlock:
unlock_page(page);
- page_cache_release(page);
+ put_page(page);
return err;
}

@@ -3643,7 +3643,7 @@ static int ext4_block_zero_page_range(handle_t *handle,
struct address_space *mapping, loff_t from, loff_t length)
{
struct inode *inode = mapping->host;
- unsigned offset = from & (PAGE_CACHE_SIZE-1);
+ unsigned offset = from & (PAGE_SIZE-1);
unsigned blocksize = inode->i_sb->s_blocksize;
unsigned max = blocksize - (offset & (blocksize - 1));

@@ -3668,7 +3668,7 @@ static int ext4_block_zero_page_range(handle_t *handle,
static int ext4_block_truncate_page(handle_t *handle,
struct address_space *mapping, loff_t from)
{
- unsigned offset = from & (PAGE_CACHE_SIZE-1);
+ unsigned offset = from & (PAGE_SIZE-1);
unsigned length;
unsigned blocksize;
struct inode *inode = mapping->host;
@@ -3806,7 +3806,7 @@ int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length)
*/
if (offset + length > inode->i_size) {
length = inode->i_size +
- PAGE_CACHE_SIZE - (inode->i_size & (PAGE_CACHE_SIZE - 1)) -
+ PAGE_SIZE - (inode->i_size & (PAGE_SIZE - 1)) -
offset;
}

@@ -4881,23 +4881,23 @@ static void ext4_wait_for_tail_page_commit(struct inode *inode)
tid_t commit_tid = 0;
int ret;

- offset = inode->i_size & (PAGE_CACHE_SIZE - 1);
+ offset = inode->i_size & (PAGE_SIZE - 1);
/*
* All buffers in the last page remain valid? Then there's nothing to
- * do. We do the check mainly to optimize the common PAGE_CACHE_SIZE ==
+ * do. We do the check mainly to optimize the common PAGE_SIZE ==
* blocksize case
*/
- if (offset > PAGE_CACHE_SIZE - (1 << inode->i_blkbits))
+ if (offset > PAGE_SIZE - (1 << inode->i_blkbits))
return;
while (1) {
page = find_lock_page(inode->i_mapping,
- inode->i_size >> PAGE_CACHE_SHIFT);
+ inode->i_size >> PAGE_SHIFT);
if (!page)
return;
ret = __ext4_journalled_invalidatepage(page, offset,
- PAGE_CACHE_SIZE - offset);
+ PAGE_SIZE - offset);
unlock_page(page);
- page_cache_release(page);
+ put_page(page);
if (ret != -EBUSY)
return;
commit_tid = 0;
@@ -5536,10 +5536,10 @@ int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
goto out;
}

- if (page->index == size >> PAGE_CACHE_SHIFT)
- len = size & ~PAGE_CACHE_MASK;
+ if (page->index == size >> PAGE_SHIFT)
+ len = size & ~PAGE_MASK;
else
- len = PAGE_CACHE_SIZE;
+ len = PAGE_SIZE;
/*
* Return if we have all the buffers mapped. This avoids the need to do
* journal_start/journal_stop which can block and take a long time
@@ -5570,7 +5570,7 @@ retry_alloc:
ret = block_page_mkwrite(vma, vmf, get_block);
if (!ret && ext4_should_journal_data(inode)) {
if (ext4_walk_page_buffers(handle, page_buffers(page), 0,
- PAGE_CACHE_SIZE, NULL, do_journal_get_write_access)) {
+ PAGE_SIZE, NULL, do_journal_get_write_access)) {
unlock_page(page);
ret = VM_FAULT_SIGBUS;
ext4_journal_stop(handle);
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 50e05df28f66..eeeade76012e 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -119,7 +119,7 @@ MODULE_PARM_DESC(mballoc_debug, "Debugging level for ext4's mballoc");
*
*
* one block each for bitmap and buddy information. So for each group we
- * take up 2 blocks. A page can contain blocks_per_page (PAGE_CACHE_SIZE /
+ * take up 2 blocks. A page can contain blocks_per_page (PAGE_SIZE /
* blocksize) blocks. So it can have information regarding groups_per_page
* which is blocks_per_page/2
*
@@ -807,7 +807,7 @@ static void mb_regenerate_buddy(struct ext4_buddy *e4b)
*
* one block each for bitmap and buddy information.
* So for each group we take up 2 blocks. A page can
- * contain blocks_per_page (PAGE_CACHE_SIZE / blocksize) blocks.
+ * contain blocks_per_page (PAGE_SIZE / blocksize) blocks.
* So it can have information regarding groups_per_page which
* is blocks_per_page/2
*
@@ -839,7 +839,7 @@ static int ext4_mb_init_cache(struct page *page, char *incore, gfp_t gfp)
sb = inode->i_sb;
ngroups = ext4_get_groups_count(sb);
blocksize = 1 << inode->i_blkbits;
- blocks_per_page = PAGE_CACHE_SIZE / blocksize;
+ blocks_per_page = PAGE_SIZE / blocksize;

groups_per_page = blocks_per_page >> 1;
if (groups_per_page == 0)
@@ -993,7 +993,7 @@ static int ext4_mb_get_buddy_page_lock(struct super_block *sb,
e4b->bd_buddy_page = NULL;
e4b->bd_bitmap_page = NULL;

- blocks_per_page = PAGE_CACHE_SIZE / sb->s_blocksize;
+ blocks_per_page = PAGE_SIZE / sb->s_blocksize;
/*
* the buddy cache inode stores the block bitmap
* and buddy information in consecutive blocks.
@@ -1028,11 +1028,11 @@ static void ext4_mb_put_buddy_page_lock(struct ext4_buddy *e4b)
{
if (e4b->bd_bitmap_page) {
unlock_page(e4b->bd_bitmap_page);
- page_cache_release(e4b->bd_bitmap_page);
+ put_page(e4b->bd_bitmap_page);
}
if (e4b->bd_buddy_page) {
unlock_page(e4b->bd_buddy_page);
- page_cache_release(e4b->bd_buddy_page);
+ put_page(e4b->bd_buddy_page);
}
}

@@ -1125,7 +1125,7 @@ ext4_mb_load_buddy_gfp(struct super_block *sb, ext4_group_t group,
might_sleep();
mb_debug(1, "load group %u\n", group);

- blocks_per_page = PAGE_CACHE_SIZE / sb->s_blocksize;
+ blocks_per_page = PAGE_SIZE / sb->s_blocksize;
grp = ext4_get_group_info(sb, group);

e4b->bd_blkbits = sb->s_blocksize_bits;
@@ -1167,7 +1167,7 @@ ext4_mb_load_buddy_gfp(struct super_block *sb, ext4_group_t group,
* is yet to initialize the same. So
* wait for it to initialize.
*/
- page_cache_release(page);
+ put_page(page);
page = find_or_create_page(inode->i_mapping, pnum, gfp);
if (page) {
BUG_ON(page->mapping != inode->i_mapping);
@@ -1203,7 +1203,7 @@ ext4_mb_load_buddy_gfp(struct super_block *sb, ext4_group_t group,
page = find_get_page_flags(inode->i_mapping, pnum, FGP_ACCESSED);
if (page == NULL || !PageUptodate(page)) {
if (page)
- page_cache_release(page);
+ put_page(page);
page = find_or_create_page(inode->i_mapping, pnum, gfp);
if (page) {
BUG_ON(page->mapping != inode->i_mapping);
@@ -1238,11 +1238,11 @@ ext4_mb_load_buddy_gfp(struct super_block *sb, ext4_group_t group,

err:
if (page)
- page_cache_release(page);
+ put_page(page);
if (e4b->bd_bitmap_page)
- page_cache_release(e4b->bd_bitmap_page);
+ put_page(e4b->bd_bitmap_page);
if (e4b->bd_buddy_page)
- page_cache_release(e4b->bd_buddy_page);
+ put_page(e4b->bd_buddy_page);
e4b->bd_buddy = NULL;
e4b->bd_bitmap = NULL;
return ret;
@@ -1257,9 +1257,9 @@ static int ext4_mb_load_buddy(struct super_block *sb, ext4_group_t group,
static void ext4_mb_unload_buddy(struct ext4_buddy *e4b)
{
if (e4b->bd_bitmap_page)
- page_cache_release(e4b->bd_bitmap_page);
+ put_page(e4b->bd_bitmap_page);
if (e4b->bd_buddy_page)
- page_cache_release(e4b->bd_buddy_page);
+ put_page(e4b->bd_buddy_page);
}


@@ -2833,8 +2833,8 @@ static void ext4_free_data_callback(struct super_block *sb,
/* No more items in the per group rb tree
* balance refcounts from ext4_mb_free_metadata()
*/
- page_cache_release(e4b.bd_buddy_page);
- page_cache_release(e4b.bd_bitmap_page);
+ put_page(e4b.bd_buddy_page);
+ put_page(e4b.bd_bitmap_page);
}
ext4_unlock_group(sb, entry->efd_group);
kmem_cache_free(ext4_free_data_cachep, entry);
@@ -4385,9 +4385,9 @@ static int ext4_mb_release_context(struct ext4_allocation_context *ac)
ext4_mb_put_pa(ac, ac->ac_sb, pa);
}
if (ac->ac_bitmap_page)
- page_cache_release(ac->ac_bitmap_page);
+ put_page(ac->ac_bitmap_page);
if (ac->ac_buddy_page)
- page_cache_release(ac->ac_buddy_page);
+ put_page(ac->ac_buddy_page);
if (ac->ac_flags & EXT4_MB_HINT_GROUP_ALLOC)
mutex_unlock(&ac->ac_lg->lg_mutex);
ext4_mb_collect_stats(ac);
@@ -4599,8 +4599,8 @@ ext4_mb_free_metadata(handle_t *handle, struct ext4_buddy *e4b,
* otherwise we'll refresh it from
* on-disk bitmap and lose not-yet-available
* blocks */
- page_cache_get(e4b->bd_buddy_page);
- page_cache_get(e4b->bd_bitmap_page);
+ get_page(e4b->bd_buddy_page);
+ get_page(e4b->bd_bitmap_page);
}
while (*n) {
parent = *n;
diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index 4098acc701c3..675b67e5d5c2 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -156,7 +156,7 @@ mext_page_double_lock(struct inode *inode1, struct inode *inode2,
page[1] = grab_cache_page_write_begin(mapping[1], index2, fl);
if (!page[1]) {
unlock_page(page[0]);
- page_cache_release(page[0]);
+ put_page(page[0]);
return -ENOMEM;
}
/*
@@ -192,7 +192,7 @@ mext_page_mkuptodate(struct page *page, unsigned from, unsigned to)
create_empty_buffers(page, blocksize, 0);

head = page_buffers(page);
- block = (sector_t)page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits);
+ block = (sector_t)page->index << (PAGE_SHIFT - inode->i_blkbits);
for (bh = head, block_start = 0; bh != head || !block_start;
block++, block_start = block_end, bh = bh->b_this_page) {
block_end = block_start + blocksize;
@@ -268,7 +268,7 @@ move_extent_per_page(struct file *o_filp, struct inode *donor_inode,
int i, err2, jblocks, retries = 0;
int replaced_count = 0;
int from = data_offset_in_page << orig_inode->i_blkbits;
- int blocks_per_page = PAGE_CACHE_SIZE >> orig_inode->i_blkbits;
+ int blocks_per_page = PAGE_SIZE >> orig_inode->i_blkbits;
struct super_block *sb = orig_inode->i_sb;
struct buffer_head *bh = NULL;

@@ -404,9 +404,9 @@ data_copy:

unlock_pages:
unlock_page(pagep[0]);
- page_cache_release(pagep[0]);
+ put_page(pagep[0]);
unlock_page(pagep[1]);
- page_cache_release(pagep[1]);
+ put_page(pagep[1]);
stop_journal:
ext4_journal_stop(handle);
if (*err == -ENOSPC &&
@@ -554,7 +554,7 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp, __u64 orig_blk,
struct inode *orig_inode = file_inode(o_filp);
struct inode *donor_inode = file_inode(d_filp);
struct ext4_ext_path *path = NULL;
- int blocks_per_page = PAGE_CACHE_SIZE >> orig_inode->i_blkbits;
+ int blocks_per_page = PAGE_SIZE >> orig_inode->i_blkbits;
ext4_lblk_t o_end, o_start = orig_blk;
ext4_lblk_t d_start = donor_blk;
int ret;
@@ -648,9 +648,9 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp, __u64 orig_blk,
if (o_end - o_start < cur_len)
cur_len = o_end - o_start;

- orig_page_index = o_start >> (PAGE_CACHE_SHIFT -
+ orig_page_index = o_start >> (PAGE_SHIFT -
orig_inode->i_blkbits);
- donor_page_index = d_start >> (PAGE_CACHE_SHIFT -
+ donor_page_index = d_start >> (PAGE_SHIFT -
donor_inode->i_blkbits);
offset_in_page = o_start % blocks_per_page;
if (cur_len > blocks_per_page- offset_in_page)
diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index 349d7aa04fe7..741599a011c1 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -442,8 +442,8 @@ int ext4_bio_write_page(struct ext4_io_submit *io,
* the page size, the remaining memory is zeroed when mapped, and
* writes to that region are not written out to the file."
*/
- if (len < PAGE_CACHE_SIZE)
- zero_user_segment(page, len, PAGE_CACHE_SIZE);
+ if (len < PAGE_SIZE)
+ zero_user_segment(page, len, PAGE_SIZE);
/*
* In the first loop we prepare and mark buffers to submit. We have to
* mark all buffers in the page before submitting so that
diff --git a/fs/ext4/readpage.c b/fs/ext4/readpage.c
index 5dc5e95063de..f24e7299e1c8 100644
--- a/fs/ext4/readpage.c
+++ b/fs/ext4/readpage.c
@@ -23,7 +23,7 @@
*
* then this code just gives up and calls the buffer_head-based read function.
* It does handle a page which has holes at the end - that is a common case:
- * the end-of-file on blocksize < PAGE_CACHE_SIZE setups.
+ * the end-of-file on blocksize < PAGE_SIZE setups.
*
*/

@@ -140,7 +140,7 @@ int ext4_mpage_readpages(struct address_space *mapping,

struct inode *inode = mapping->host;
const unsigned blkbits = inode->i_blkbits;
- const unsigned blocks_per_page = PAGE_CACHE_SIZE >> blkbits;
+ const unsigned blocks_per_page = PAGE_SIZE >> blkbits;
const unsigned blocksize = 1 << blkbits;
sector_t block_in_file;
sector_t last_block;
@@ -173,7 +173,7 @@ int ext4_mpage_readpages(struct address_space *mapping,
if (page_has_buffers(page))
goto confused;

- block_in_file = (sector_t)page->index << (PAGE_CACHE_SHIFT - blkbits);
+ block_in_file = (sector_t)page->index << (PAGE_SHIFT - blkbits);
last_block = block_in_file + nr_pages * blocks_per_page;
last_block_in_file = (i_size_read(inode) + blocksize - 1) >> blkbits;
if (last_block > last_block_in_file)
@@ -217,7 +217,7 @@ int ext4_mpage_readpages(struct address_space *mapping,
set_error_page:
SetPageError(page);
zero_user_segment(page, 0,
- PAGE_CACHE_SIZE);
+ PAGE_SIZE);
unlock_page(page);
goto next_page;
}
@@ -250,7 +250,7 @@ int ext4_mpage_readpages(struct address_space *mapping,
}
if (first_hole != blocks_per_page) {
zero_user_segment(page, first_hole << blkbits,
- PAGE_CACHE_SIZE);
+ PAGE_SIZE);
if (first_hole == 0) {
SetPageUptodate(page);
unlock_page(page);
@@ -319,7 +319,7 @@ int ext4_mpage_readpages(struct address_space *mapping,
unlock_page(page);
next_page:
if (pages)
- page_cache_release(page);
+ put_page(page);
}
BUG_ON(pages && !list_empty(pages));
if (bio)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 99996e9a8f57..75b229414ee8 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1782,7 +1782,7 @@ static int parse_options(char *options, struct super_block *sb,
int blocksize =
BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size);

- if (blocksize < PAGE_CACHE_SIZE) {
+ if (blocksize < PAGE_SIZE) {
ext4_msg(sb, KERN_ERR, "can't mount with "
"dioread_nolock if block size != PAGE_SIZE");
return 0;
@@ -3806,7 +3806,7 @@ no_journal:
}

if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) &&
- (blocksize != PAGE_CACHE_SIZE)) {
+ (blocksize != PAGE_SIZE)) {
ext4_msg(sb, KERN_ERR,
"Unsupported blocksize for fs encryption");
goto failed_mount_wq;
diff --git a/fs/ext4/symlink.c b/fs/ext4/symlink.c
index 6f7ee30a89ce..75ed5c2f0c16 100644
--- a/fs/ext4/symlink.c
+++ b/fs/ext4/symlink.c
@@ -80,12 +80,12 @@ static const char *ext4_encrypted_get_link(struct dentry *dentry,
if (res <= plen)
paddr[res] = '\0';
if (cpage)
- page_cache_release(cpage);
+ put_page(cpage);
set_delayed_call(done, kfree_link, paddr);
return paddr;
errout:
if (cpage)
- page_cache_release(cpage);
+ put_page(cpage);
kfree(paddr);
return ERR_PTR(res);
}
--
2.7.0