AcoSail/kernel_optimize_test
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get rid of cont_write_begin_newtrunc

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Move the call to vmtruncate to get rid of accessive blocks to the callers
in preparation of the new truncate sequence and rename the non-truncating
version to cont_write_begin.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Christoph Hellwig 2010-06-04 11:29:55 +02:00 committed by Al Viro
parent ea0f04e595
commit 282dc17884
9 changed files with 62 additions and 30 deletions
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11
fs/adfs/inode.c
View File

@ -50,10 +50,19 @@ static int adfs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{
int ret;
*pagep = NULL;
return cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
adfs_get_block,
&ADFS_I(mapping->host)->mmu_private);
if (unlikely(ret)) {
loff_t isize = mapping->host->i_size;
if (pos + len > isize)
vmtruncate(mapping->host, isize);
}
return ret;
}
static sector_t _adfs_bmap(struct address_space *mapping, sector_t block)

11
fs/affs/file.c
View File

@ -406,10 +406,19 @@ static int affs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{
int ret;
*pagep = NULL;
return cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
affs_get_block,
&AFFS_I(mapping->host)->mmu_private);
if (unlikely(ret)) {
loff_t isize = mapping->host->i_size;
if (pos + len > isize)
vmtruncate(mapping->host, isize);
}
return ret;
}
static sector_t _affs_bmap(struct address_space *mapping, sector_t block)

21
fs/buffer.c
View File

@ -2351,7 +2351,7 @@ static int cont_expand_zero(struct file *file, struct address_space *mapping,
* For moronic filesystems that do not allow holes in file.
* We may have to extend the file.
*/
int cont_write_begin_newtrunc(struct file *file, struct address_space *mapping,
int cont_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata,
get_block_t *get_block, loff_t *bytes)
@ -2377,25 +2377,6 @@ int cont_write_begin_newtrunc(struct file *file, struct address_space *mapping,
out:
return err;
}
EXPORT_SYMBOL(cont_write_begin_newtrunc);
int cont_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata,
get_block_t *get_block, loff_t *bytes)
{
int ret;
ret = cont_write_begin_newtrunc(file, mapping, pos, len, flags,
pagep, fsdata, get_block, bytes);
if (unlikely(ret)) {
loff_t isize = mapping->host->i_size;
if (pos + len > isize)
vmtruncate(mapping->host, isize);
}
return ret;
}
EXPORT_SYMBOL(cont_write_begin);
int block_prepare_write(struct page *page, unsigned from, unsigned to,

2
fs/fat/inode.c
View File

@ -159,7 +159,7 @@ static int fat_write_begin(struct file *file, struct address_space *mapping,
int err;
*pagep = NULL;
err = cont_write_begin_newtrunc(file, mapping, pos, len, flags,
err = cont_write_begin(file, mapping, pos, len, flags,
pagep, fsdata, fat_get_block,
&MSDOS_I(mapping->host)->mmu_private);
if (err < 0)

11
fs/hfs/inode.c
View File

@ -39,10 +39,19 @@ static int hfs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{
int ret;
*pagep = NULL;
return cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
hfs_get_block,
&HFS_I(mapping->host)->phys_size);
if (unlikely(ret)) {
loff_t isize = mapping->host->i_size;
if (pos + len > isize)
vmtruncate(mapping->host, isize);
}
return ret;
}
static sector_t hfs_bmap(struct address_space *mapping, sector_t block)

11
fs/hfsplus/inode.c
View File

@ -31,10 +31,19 @@ static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{
int ret;
*pagep = NULL;
return cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
hfsplus_get_block,
&HFSPLUS_I(mapping->host).phys_size);
if (unlikely(ret)) {
loff_t isize = mapping->host->i_size;
if (pos + len > isize)
vmtruncate(mapping->host, isize);
}
return ret;
}
static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)

11
fs/hpfs/file.c
View File

@ -97,10 +97,19 @@ static int hpfs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{
int ret;
*pagep = NULL;
return cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
hpfs_get_block,
&hpfs_i(mapping->host)->mmu_private);
if (unlikely(ret)) {
loff_t isize = mapping->host->i_size;
if (pos + len > isize)
vmtruncate(mapping->host, isize);
}
return ret;
}
static sector_t _hpfs_bmap(struct address_space *mapping, sector_t block)

11
fs/qnx4/inode.c
View File

@ -320,10 +320,19 @@ static int qnx4_write_begin(struct file *file, struct address_space *mapping,
struct page **pagep, void **fsdata)
{
struct qnx4_inode_info *qnx4_inode = qnx4_i(mapping->host);
int ret;
*pagep = NULL;
return cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
qnx4_get_block,
&qnx4_inode->mmu_private);
if (unlikely(ret)) {
loff_t isize = mapping->host->i_size;
if (pos + len > isize)
vmtruncate(mapping->host, isize);
}
return ret;
}
static sector_t qnx4_bmap(struct address_space *mapping, sector_t block)
{

3
include/linux/buffer_head.h
View File

@ -217,9 +217,6 @@ int generic_write_end(struct file *, struct address_space *,
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_newtrunc(struct file *, struct address_space *, loff_t,
unsigned, unsigned, struct page **, void **,
get_block_t *, loff_t *);
int cont_write_begin(struct file *, struct address_space *, loff_t,
unsigned, unsigned, struct page **, void **,
get_block_t *, loff_t *);