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Subject[09/37] Use page_cache_xxx in fs/libfs.c
Signed-off-by: Christoph Lameter <clameter@sgi.com>

---
fs/libfs.c | 18 ++++++++++--------
1 file changed, 10 insertions(+), 8 deletions(-)
Index: vps/fs/libfs.c
===================================================================
--- vps.orig/fs/libfs.c 2007-06-11 21:39:09.000000000 -0700
+++ vps/fs/libfs.c 2007-06-11 22:08:13.000000000 -0700
@@ -16,7 +16,8 @@ int simple_getattr(struct vfsmount *mnt,
{
struct inode *inode = dentry->d_inode;
generic_fillattr(inode, stat);
- stat->blocks = inode->i_mapping->nrpages << (PAGE_CACHE_SHIFT - 9);
+ stat->blocks = inode->i_mapping->nrpages <<
+ (page_cache_shift(inode->i_mapping) - 9);
return 0;
}

@@ -340,10 +341,10 @@ int simple_prepare_write(struct file *fi
unsigned from, unsigned to)
{
if (!PageUptodate(page)) {
- if (to - from != PAGE_CACHE_SIZE)
+ if (to - from != page_cache_size(file->f_mapping))
zero_user_segments(page,
0, from,
- to, PAGE_CACHE_SIZE);
+ to, page_cache_size(file->f_mapping));
}
return 0;
}
@@ -356,8 +357,8 @@ int simple_write_begin(struct file *file
pgoff_t index;
unsigned from;

- index = pos >> PAGE_CACHE_SHIFT;
- from = pos & (PAGE_CACHE_SIZE - 1);
+ index = page_cache_index(mapping, pos);
+ from = page_cache_offset(mapping, pos);

page = __grab_cache_page(mapping, index);
if (!page)
@@ -371,8 +372,9 @@ int simple_write_begin(struct file *file
int simple_commit_write(struct file *file, struct page *page,
unsigned from, unsigned to)
{
- struct inode *inode = page->mapping->host;
- loff_t pos = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;
+ struct address_space *mapping = page->mapping;
+ struct inode *inode = mapping->host;
+ loff_t pos = page_cache_pos(mapping, page->index, to);

if (!PageUptodate(page))
SetPageUptodate(page);
@@ -390,7 +392,7 @@ int simple_write_end(struct file *file,
loff_t pos, unsigned len, unsigned copied,
struct page *page, void *fsdata)
{
- unsigned from = pos & (PAGE_CACHE_SIZE - 1);
+ unsigned from = page_cache_offset(mapping, pos);

/* zero the stale part of the page if we did a short copy */
if (copied < len)
--
-
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