__block_write_begin and block_prepare_write are identical except for slightly
different calling conventions. Convert all callers to the __block_write_begin
calling conventions and drop block_prepare_write.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Index: linux-2.6/fs/buffer.c
===================================================================
--- linux-2.6.orig/fs/buffer.c 2010-10-04 18:58:58.364253786 +0200
+++ linux-2.6/fs/buffer.c 2010-10-05 10:46:18.568253785 +0200
@@ -1834,9 +1834,11 @@ void page_zero_new_buffers(struct page *
}
EXPORT_SYMBOL(page_zero_new_buffers);
-int block_prepare_write(struct page *page, unsigned from, unsigned to,
+int __block_write_begin(struct page *page, loff_t pos, unsigned len,
get_block_t *get_block)
{
+ unsigned from = pos & (PAGE_CACHE_SIZE - 1);
+ unsigned to = from + len;
struct inode *inode = page->mapping->host;
unsigned block_start, block_end;
sector_t block;
@@ -1916,7 +1918,7 @@ int block_prepare_write(struct page *pag
}
return err;
}
-EXPORT_SYMBOL(block_prepare_write);
+EXPORT_SYMBOL(__block_write_begin);
static int __block_commit_write(struct inode *inode, struct page *page,
unsigned from, unsigned to)
@@ -1953,15 +1955,6 @@ static int __block_commit_write(struct i
return 0;
}
-int __block_write_begin(struct page *page, loff_t pos, unsigned len,
- get_block_t *get_block)
-{
- unsigned start = pos & (PAGE_CACHE_SIZE - 1);
-
- return block_prepare_write(page, start, start + len, get_block);
-}
-EXPORT_SYMBOL(__block_write_begin);
-
/*
* block_write_begin takes care of the basic task of block allocation and
* bringing partial write blocks uptodate first.
@@ -2379,7 +2372,7 @@ block_page_mkwrite(struct vm_area_struct
else
end = PAGE_CACHE_SIZE;
- ret = block_prepare_write(page, 0, end, get_block);
+ ret = __block_write_begin(page, 0, end, get_block);
if (!ret)
ret = block_commit_write(page, 0, end);
Index: linux-2.6/fs/ext3/inode.c
===================================================================
--- linux-2.6.orig/fs/ext3/inode.c 2010-10-04 18:58:48.208003611 +0200
+++ linux-2.6/fs/ext3/inode.c 2010-10-05 10:46:18.570254414 +0200
@@ -1696,8 +1696,8 @@ static int ext3_journalled_writepage(str
* doesn't seem much point in redirtying the page here.
*/
ClearPageChecked(page);
- ret = block_prepare_write(page, 0, PAGE_CACHE_SIZE,
- ext3_get_block);
+ ret = __block_write_begin(page, 0, PAGE_CACHE_SIZE,
+ ext3_get_block);
if (ret != 0) {
ext3_journal_stop(handle);
goto out_unlock;
Index: linux-2.6/fs/ext4/inode.c
===================================================================
--- linux-2.6.orig/fs/ext4/inode.c 2010-10-04 18:58:48.217003541 +0200
+++ linux-2.6/fs/ext4/inode.c 2010-10-05 10:46:18.575254205 +0200
@@ -1538,10 +1538,10 @@ static int do_journal_get_write_access(h
if (!buffer_mapped(bh) || buffer_freed(bh))
return 0;
/*
- * __block_prepare_write() could have dirtied some buffers. Clean
+ * __block_write_begin() could have dirtied some buffers. Clean
* the dirty bit as jbd2_journal_get_write_access() could complain
* otherwise about fs integrity issues. Setting of the dirty bit
- * by __block_prepare_write() isn't a real problem here as we clear
+ * by __block_write_begin() isn't a real problem here as we clear
* the bit before releasing a page lock and thus writeback cannot
* ever write the buffer.
*/
@@ -2550,8 +2550,7 @@ static int ext4_da_get_block_prep(struct
if (buffer_delay(bh))
return 0; /* Not sure this could or should happen */
/*
- * XXX: __block_prepare_write() unmaps passed block,
- * is it OK?
+ * XXX: __block_write_begin() unmaps passed block, is it OK?
*/
ret = ext4_da_reserve_space(inode, iblock);
if (ret)
@@ -2583,7 +2582,7 @@ static int ext4_da_get_block_prep(struct
/*
* This function is used as a standard get_block_t calback function
* when there is no desire to allocate any blocks. It is used as a
- * callback function for block_prepare_write() and block_write_full_page().
+ * callback function for block_write_begin() and block_write_full_page().
* These functions should only try to map a single block at a time.
*
* Since this function doesn't do block allocations even if the caller
@@ -2743,7 +2742,7 @@ static int ext4_writepage(struct page *p
* all are mapped and non delay. We don't want to
* do block allocation here.
*/
- ret = block_prepare_write(page, 0, len,
+ ret = __block_write_begin(page, 0, len,
noalloc_get_block_write);
if (!ret) {
page_bufs = page_buffers(page);
Index: linux-2.6/fs/reiserfs/inode.c
===================================================================
--- linux-2.6.orig/fs/reiserfs/inode.c 2010-10-04 18:58:48.317003611 +0200
+++ linux-2.6/fs/reiserfs/inode.c 2010-10-05 10:46:18.579254205 +0200
@@ -22,8 +22,6 @@
int reiserfs_commit_write(struct file *f, struct page *page,
unsigned from, unsigned to);
-int reiserfs_prepare_write(struct file *f, struct page *page,
- unsigned from, unsigned to);
void reiserfs_evict_inode(struct inode *inode)
{
@@ -165,7 +163,7 @@ inline void make_le_item_head(struct ite
** but tail is still sitting in a direct item, and we can't write to
** it. So, look through this page, and check all the mapped buffers
** to make sure they have valid block numbers. Any that don't need
-** to be unmapped, so that block_prepare_write will correctly call
+** to be unmapped, so that __block_write_begin will correctly call
** reiserfs_get_block to convert the tail into an unformatted node
*/
static inline void fix_tail_page_for_writing(struct page *page)
@@ -439,13 +437,13 @@ static int reiserfs_bmap(struct inode *i
}
/* special version of get_block that is only used by grab_tail_page right
-** now. It is sent to block_prepare_write, and when you try to get a
+** now. It is sent to __block_write_begin, and when you try to get a
** block past the end of the file (or a block from a hole) it returns
-** -ENOENT instead of a valid buffer. block_prepare_write expects to
+** -ENOENT instead of a valid buffer. __block_write_begin expects to
** be able to do i/o on the buffers returned, unless an error value
** is also returned.
**
-** So, this allows block_prepare_write to be used for reading a single block
+** So, this allows __block_write_begin to be used for reading a single block
** in a page. Where it does not produce a valid page for holes, or past the
** end of the file. This turns out to be exactly what we need for reading
** tails for conversion.
@@ -558,11 +556,12 @@ static int convert_tail_for_hole(struct
**
** We must fix the tail page for writing because it might have buffers
** that are mapped, but have a block number of 0. This indicates tail
- ** data that has been read directly into the page, and block_prepare_write
- ** won't trigger a get_block in this case.
+ ** data that has been read directly into the page, and
+ ** __block_write_begin won't trigger a get_block in this case.
*/
fix_tail_page_for_writing(tail_page);
- retval = reiserfs_prepare_write(NULL, tail_page, tail_start, tail_end);
+ retval = __reiserfs_write_begin(tail_page, tail_start,
+ tail_end - tail_start);
if (retval)
goto unlock;
@@ -2033,7 +2032,7 @@ static int grab_tail_page(struct inode *
/* start within the page of the last block in the file */
start = (offset / blocksize) * blocksize;
- error = block_prepare_write(page, start, offset,
+ error = __block_write_begin(page, start, offset - start,
reiserfs_get_block_create_0);
if (error)
goto unlock;
@@ -2628,8 +2627,7 @@ static int reiserfs_write_begin(struct f
return ret;
}
-int reiserfs_prepare_write(struct file *f, struct page *page,
- unsigned from, unsigned to)
+int __reiserfs_write_begin(struct page *page, unsigned from, unsigned len)
{
struct inode *inode = page->mapping->host;
int ret;
@@ -2650,7 +2648,7 @@ int reiserfs_prepare_write(struct file *
th->t_refcount++;
}
- ret = block_prepare_write(page, from, to, reiserfs_get_block);
+ ret = __block_write_begin(page, from, len, reiserfs_get_block);
if (ret && reiserfs_transaction_running(inode->i_sb)) {
struct reiserfs_transaction_handle *th = current->journal_info;
/* this gets a little ugly. If reiserfs_get_block returned an
Index: linux-2.6/fs/xfs/linux-2.6/xfs_super.c
===================================================================
--- linux-2.6.orig/fs/xfs/linux-2.6/xfs_super.c 2010-10-04 18:58:48.339003331 +0200
+++ linux-2.6/fs/xfs/linux-2.6/xfs_super.c 2010-10-05 10:46:18.584254345 +0200
@@ -577,7 +577,7 @@ xfs_max_file_offset(
/* Figure out maximum filesize, on Linux this can depend on
* the filesystem blocksize (on 32 bit platforms).
- * __block_prepare_write does this in an [unsigned] long...
+ * __block_write_begin does this in an [unsigned] long...
* page->index << (PAGE_CACHE_SHIFT - bbits)
* So, for page sized blocks (4K on 32 bit platforms),
* this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
Index: linux-2.6/fs/gfs2/aops.c
===================================================================
--- linux-2.6.orig/fs/gfs2/aops.c 2010-10-04 18:58:48.233003681 +0200
+++ linux-2.6/fs/gfs2/aops.c 2010-10-05 10:46:18.591004380 +0200
@@ -618,7 +618,6 @@ static int gfs2_write_begin(struct file
struct gfs2_alloc *al;
pgoff_t index = pos >> PAGE_CACHE_SHIFT;
unsigned from = pos & (PAGE_CACHE_SIZE - 1);
- unsigned to = from + len;
struct page *page;
gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &ip->i_gh);
@@ -689,7 +688,7 @@ static int gfs2_write_begin(struct file
}
prepare_write:
- error = block_prepare_write(page, from, to, gfs2_block_map);
+ error = __block_write_begin(page, from, len, gfs2_block_map);
out:
if (error == 0)
return 0;
Index: linux-2.6/fs/ocfs2/aops.c
===================================================================
--- linux-2.6.orig/fs/ocfs2/aops.c 2010-10-04 18:58:48.299003890 +0200
+++ linux-2.6/fs/ocfs2/aops.c 2010-10-05 10:46:18.594004310 +0200
@@ -165,7 +165,7 @@ int ocfs2_get_block(struct inode *inode,
* ocfs2 never allocates in this function - the only time we
* need to use BH_New is when we're extending i_size on a file
* system which doesn't support holes, in which case BH_New
- * allows block_prepare_write() to zero.
+ * allows __block_write_begin() to zero.
*
* If we see this on a sparse file system, then a truncate has
* raced us and removed the cluster. In this case, we clear
@@ -407,21 +407,6 @@ static int ocfs2_writepage(struct page *
return ret;
}
-/*
- * This is called from ocfs2_write_zero_page() which has handled it's
- * own cluster locking and has ensured allocation exists for those
- * blocks to be written.
- */
-int ocfs2_prepare_write_nolock(struct inode *inode, struct page *page,
- unsigned from, unsigned to)
-{
- int ret;
-
- ret = block_prepare_write(page, from, to, ocfs2_get_block);
-
- return ret;
-}
-
/* Taken from ext3. We don't necessarily need the full blown
* functionality yet, but IMHO it's better to cut and paste the whole
* thing so we can avoid introducing our own bugs (and easily pick up
@@ -732,7 +717,7 @@ static int ocfs2_should_read_blk(struct
}
/*
- * Some of this taken from block_prepare_write(). We already have our
+ * Some of this taken from __block_write_begin(). We already have our
* mapping by now though, and the entire write will be allocating or
* it won't, so not much need to use BH_New.
*
Index: linux-2.6/fs/ocfs2/aops.h
===================================================================
--- linux-2.6.orig/fs/ocfs2/aops.h 2010-09-26 23:31:14.181327791 +0200
+++ linux-2.6/fs/ocfs2/aops.h 2010-10-05 10:46:18.597026101 +0200
@@ -22,9 +22,6 @@
#ifndef OCFS2_AOPS_H
#define OCFS2_AOPS_H
-int ocfs2_prepare_write_nolock(struct inode *inode, struct page *page,
- unsigned from, unsigned to);
-
handle_t *ocfs2_start_walk_page_trans(struct inode *inode,
struct page *page,
unsigned from,
Index: linux-2.6/fs/reiserfs/ioctl.c
===================================================================
--- linux-2.6.orig/fs/reiserfs/ioctl.c 2010-10-05 10:42:40.815254484 +0200
+++ linux-2.6/fs/reiserfs/ioctl.c 2010-10-05 10:46:18.600025961 +0200
@@ -160,8 +160,6 @@ long reiserfs_compat_ioctl(struct file *
int reiserfs_commit_write(struct file *f, struct page *page,
unsigned from, unsigned to);
-int reiserfs_prepare_write(struct file *f, struct page *page,
- unsigned from, unsigned to);
/*
** reiserfs_unpack
** Function try to convert tail from direct item into indirect.
@@ -200,7 +198,7 @@ int reiserfs_unpack(struct inode *inode,
}
/* we unpack by finding the page with the tail, and calling
- ** reiserfs_prepare_write on that page. This will force a
+ ** __reiserfs_write_begin on that page. This will force a
** reiserfs_get_block to unpack the tail for us.
*/
index = inode->i_size >> PAGE_CACHE_SHIFT;
@@ -210,7 +208,7 @@ int reiserfs_unpack(struct inode *inode,
if (!page) {
goto out;
}
- retval = reiserfs_prepare_write(NULL, page, write_from, write_from);
+ retval = __reiserfs_write_begin(page, write_from, 0);
if (retval)
goto out_unlock;
Index: linux-2.6/fs/reiserfs/xattr.c
===================================================================
--- linux-2.6.orig/fs/reiserfs/xattr.c 2010-09-26 23:31:14.722327792 +0200
+++ linux-2.6/fs/reiserfs/xattr.c 2010-10-05 10:46:18.604004031 +0200
@@ -418,8 +418,6 @@ static inline __u32 xattr_hash(const cha
int reiserfs_commit_write(struct file *f, struct page *page,
unsigned from, unsigned to);
-int reiserfs_prepare_write(struct file *f, struct page *page,
- unsigned from, unsigned to);
static void update_ctime(struct inode *inode)
{
@@ -532,8 +530,7 @@ reiserfs_xattr_set_handle(struct reiserf
rxh->h_hash = cpu_to_le32(xahash);
}
- err = reiserfs_prepare_write(NULL, page, page_offset,
- page_offset + chunk + skip);
+ err = __reiserfs_write_begin(page, page_offset, chunk + skip);
if (!err) {
if (buffer)
memcpy(data + skip, buffer + buffer_pos, chunk);
Index: linux-2.6/include/linux/reiserfs_fs.h
===================================================================
--- linux-2.6.orig/include/linux/reiserfs_fs.h 2010-10-04 18:58:48.455003471 +0200
+++ linux-2.6/include/linux/reiserfs_fs.h 2010-10-05 10:46:18.607005847 +0200
@@ -2072,6 +2072,8 @@ void sd_attrs_to_i_attrs(__u16 sd_attrs,
void i_attrs_to_sd_attrs(struct inode *inode, __u16 * sd_attrs);
int reiserfs_setattr(struct dentry *dentry, struct iattr *attr);
+int __reiserfs_write_begin(struct page *page, unsigned from, unsigned len);
+
/* namei.c */
void set_de_name_and_namelen(struct reiserfs_dir_entry *de);
int search_by_entry_key(struct super_block *sb, const struct cpu_key *key,
Index: linux-2.6/include/linux/buffer_head.h
===================================================================
--- linux-2.6.orig/include/linux/buffer_head.h 2010-10-04 18:58:58.448253785 +0200
+++ linux-2.6/include/linux/buffer_head.h 2010-10-05 10:46:18.610005078 +0200
@@ -214,7 +214,6 @@ int generic_write_end(struct file *, str
loff_t, unsigned, unsigned,
struct page *, void *);
void page_zero_new_buffers(struct page *page, unsigned from, unsigned to);
-int block_prepare_write(struct page*, unsigned, unsigned, get_block_t*);
int cont_write_begin(struct file *, struct address_space *, loff_t,
unsigned, unsigned, struct page **, void **,
get_block_t *, loff_t *);
Index: linux-2.6/fs/ocfs2/file.c
===================================================================
--- linux-2.6.orig/fs/ocfs2/file.c 2010-10-04 18:58:58.432254344 +0200
+++ linux-2.6/fs/ocfs2/file.c 2010-10-05 10:46:18.615005916 +0200
@@ -807,13 +807,12 @@ static int ocfs2_write_zero_page(struct
block_end = block_start + (1 << inode->i_blkbits);
/*
- * block_start is block-aligned. Bump it by one to
- * force ocfs2_{prepare,commit}_write() to zero the
+ * block_start is block-aligned. Bump it by one to force
+ * __block_write_begin and block_commit_write to zero the
* whole block.
*/
- ret = ocfs2_prepare_write_nolock(inode, page,
- block_start + 1,
- block_start + 1);
+ ret = __block_write_begin(page, block_start + 1, 0,
+ ocfs2_get_block);
if (ret < 0) {
mlog_errno(ret);
goto out_unlock;
--
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