[03/36] Use page_cache_xxx functions in mm/filemap.c

clameter
2007-08-28T19:10:37Z

[-- Attachment #1: 0003-Use-page_cache_xxx-functions-in-mm-filemap.c.patch --]
[-- Type: text/plain, Size: 6637 bytes --]

Conver the uses of PAGE_CACHE_xxx to use page_cache_xxx instead.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
---
mm/filemap.c | 56 ++++++++++++++++++++++++++++----------------------------
1 files changed, 28 insertions(+), 28 deletions(-)

Index: linux-2.6/mm/filemap.c
===================================================================
--- linux-2.6.orig/mm/filemap.c 2007-08-27 19:22:13.000000000 -0700
+++ linux-2.6/mm/filemap.c 2007-08-27 19:31:13.000000000 -0700
@@ -303,8 +303,8 @@ int wait_on_page_writeback_range(struct
int sync_page_range(struct inode *inode, struct address_space *mapping,
loff_t pos, loff_t count)
{
- pgoff_t start = pos >> PAGE_CACHE_SHIFT;
- pgoff_t end = (pos + count - 1) >> PAGE_CACHE_SHIFT;
+ pgoff_t start = page_cache_index(mapping, pos);
+ pgoff_t end = page_cache_index(mapping, pos + count - 1);
int ret;

if (!mapping_cap_writeback_dirty(mapping) || !count)
@@ -335,8 +335,8 @@ EXPORT_SYMBOL(sync_page_range);
int sync_page_range_nolock(struct inode *inode, struct address_space *mapping,
loff_t pos, loff_t count)
{
- pgoff_t start = pos >> PAGE_CACHE_SHIFT;
- pgoff_t end = (pos + count - 1) >> PAGE_CACHE_SHIFT;
+ pgoff_t start = page_cache_index(mapping, pos);
+ pgoff_t end = page_cache_index(mapping, pos + count - 1);
int ret;

if (!mapping_cap_writeback_dirty(mapping) || !count)
@@ -365,7 +365,7 @@ int filemap_fdatawait(struct address_spa
return 0;

return wait_on_page_writeback_range(mapping, 0,
- (i_size - 1) >> PAGE_CACHE_SHIFT);
+ page_cache_index(mapping, i_size - 1));
}
EXPORT_SYMBOL(filemap_fdatawait);

@@ -413,8 +413,8 @@ int filemap_write_and_wait_range(struct
/* See comment of filemap_write_and_wait() */
if (err != -EIO) {
int err2 = wait_on_page_writeback_range(mapping,
- lstart >> PAGE_CACHE_SHIFT,
- lend >> PAGE_CACHE_SHIFT);
+ page_cache_index(mapping, lstart),
+ page_cache_index(mapping, lend));
if (!err)
err = err2;
}
@@ -877,12 +877,12 @@ void do_generic_mapping_read(struct addr
struct file_ra_state ra = *_ra;

cached_page = NULL;
- index = *ppos >> PAGE_CACHE_SHIFT;
+ index = page_cache_index(mapping, *ppos);
next_index = index;
prev_index = ra.prev_index;
prev_offset = ra.prev_offset;
- last_index = (*ppos + desc->count + PAGE_CACHE_SIZE-1) >> PAGE_CACHE_SHIFT;
- offset = *ppos & ~PAGE_CACHE_MASK;
+ last_index = page_cache_next(mapping, *ppos + desc->count);
+ offset = page_cache_offset(mapping, *ppos);

for (;;) {
struct page *page;
@@ -919,16 +919,16 @@ page_ok:
*/

isize = i_size_read(inode);
- end_index = (isize - 1) >> PAGE_CACHE_SHIFT;
+ end_index = page_cache_index(mapping, isize - 1);
if (unlikely(!isize || index > end_index)) {
page_cache_release(page);
goto out;
}

/* nr is the maximum number of bytes to copy from this page */
- nr = PAGE_CACHE_SIZE;
+ nr = page_cache_size(mapping);
if (index == end_index) {
- nr = ((isize - 1) & ~PAGE_CACHE_MASK) + 1;
+ nr = page_cache_offset(mapping, isize - 1) + 1;
if (nr <= offset) {
page_cache_release(page);
goto out;
@@ -963,8 +963,8 @@ page_ok:
*/
ret = actor(desc, page, offset, nr);
offset += ret;
- index += offset >> PAGE_CACHE_SHIFT;
- offset &= ~PAGE_CACHE_MASK;
+ index += page_cache_index(mapping, offset);
+ offset = page_cache_offset(mapping, offset);
prev_offset = offset;
ra.prev_offset = offset;

@@ -1058,7 +1058,7 @@ out:
*_ra = ra;
_ra->prev_index = prev_index;

- *ppos = ((loff_t) index << PAGE_CACHE_SHIFT) + offset;
+ *ppos = page_cache_pos(mapping, index, offset);
if (cached_page)
page_cache_release(cached_page);
if (filp)
@@ -1240,8 +1240,8 @@ asmlinkage ssize_t sys_readahead(int fd,
if (file) {
if (file->f_mode & FMODE_READ) {
struct address_space *mapping = file->f_mapping;
- unsigned long start = offset >> PAGE_CACHE_SHIFT;
- unsigned long end = (offset + count - 1) >> PAGE_CACHE_SHIFT;
+ unsigned long start = page_cache_index(mapping, offset);
+ unsigned long end = page_cache_index(mapping, offset + count - 1);
unsigned long len = end - start + 1;
ret = do_readahead(mapping, file, start, len);
}
@@ -1310,7 +1310,7 @@ int filemap_fault(struct vm_area_struct
int did_readaround = 0;
int ret = 0;

- size = (i_size_read(inode) + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+ size = page_cache_next(mapping, i_size_read(inode));
if (vmf->pgoff >= size)
goto outside_data_content;

@@ -1385,7 +1385,7 @@ retry_find:
goto page_not_uptodate;

/* Must recheck i_size under page lock */
- size = (i_size_read(inode) + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+ size = page_cache_next(mapping, i_size_read(inode));
if (unlikely(vmf->pgoff >= size)) {
unlock_page(page);
goto outside_data_content;
@@ -1869,9 +1869,9 @@ generic_file_buffered_write(struct kiocb
unsigned long offset;
size_t copied;

- offset = (pos & (PAGE_CACHE_SIZE -1)); /* Within page */
- index = pos >> PAGE_CACHE_SHIFT;
- bytes = PAGE_CACHE_SIZE - offset;
+ offset = page_cache_offset(mapping, pos); /* Within page */
+ index = page_cache_index(mapping, pos);
+ bytes = page_cache_size(mapping) - offset;

/* Limit the size of the copy to the caller's write size */
bytes = min(bytes, count);
@@ -2082,8 +2082,8 @@ __generic_file_aio_write_nolock(struct k
if (err == 0) {
written = written_buffered;
invalidate_mapping_pages(mapping,
- pos >> PAGE_CACHE_SHIFT,
- endbyte >> PAGE_CACHE_SHIFT);
+ page_cache_index(mapping, pos),
+ page_cache_index(mapping, endbyte));
} else {
/*
* We don't know how much we wrote, so just return
@@ -2170,7 +2170,7 @@ generic_file_direct_IO(int rw, struct ki
*/
if (rw == WRITE) {
write_len = iov_length(iov, nr_segs);
- end = (offset + write_len - 1) >> PAGE_CACHE_SHIFT;
+ end = page_cache_index(mapping, offset + write_len - 1);
if (mapping_mapped(mapping))
unmap_mapping_range(mapping, offset, write_len, 0);
}
@@ -2187,7 +2187,7 @@ generic_file_direct_IO(int rw, struct ki
*/
if (rw == WRITE && mapping->nrpages) {
retval = invalidate_inode_pages2_range(mapping,
- offset >> PAGE_CACHE_SHIFT, end);
+ page_cache_index(mapping, offset), end);
if (retval)
goto out;
}
@@ -2205,7 +2205,7 @@ generic_file_direct_IO(int rw, struct ki
*/
if (rw == WRITE && mapping->nrpages) {
int err = invalidate_inode_pages2_range(mapping,
- offset >> PAGE_CACHE_SHIFT, end);
+ page_cache_index(mapping, offset), end);
if (err && retval >= 0)
retval = err;
}

--