[14/36] Use page_cache_xxx in fs/splice.c

clameter
2007-08-28T19:14:20Z

[-- Attachment #1: 0014-Use-page_cache_xxx-in-fs-splice.c.patch --]
[-- Type: text/plain, Size: 3215 bytes --]

Use page_cache_xxx in fs/splice.c

Signed-off-by: Christoph Lameter <clameter@sgi.com>
---
fs/splice.c | 27 ++++++++++++++-------------
1 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/fs/splice.c b/fs/splice.c
index c010a72..7910f32 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -279,9 +279,9 @@ __generic_file_splice_read(struct file *in, loff_t *ppos,
.ops = &page_cache_pipe_buf_ops,
};

- index = *ppos >> PAGE_CACHE_SHIFT;
- loff = *ppos & ~PAGE_CACHE_MASK;
- req_pages = (len + loff + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+ index = page_cache_index(mapping, *ppos);
+ loff = page_cache_offset(mapping, *ppos);
+ req_pages = page_cache_next(mapping, len + loff);
nr_pages = min(req_pages, (unsigned)PIPE_BUFFERS);

/*
@@ -336,7 +336,7 @@ __generic_file_splice_read(struct file *in, loff_t *ppos,
* Now loop over the map and see if we need to start IO on any
* pages, fill in the partial map, etc.
*/
- index = *ppos >> PAGE_CACHE_SHIFT;
+ index = page_cache_index(mapping, *ppos);
nr_pages = spd.nr_pages;
spd.nr_pages = 0;
for (page_nr = 0; page_nr < nr_pages; page_nr++) {
@@ -348,7 +348,8 @@ __generic_file_splice_read(struct file *in, loff_t *ppos,
/*
* this_len is the max we'll use from this page
*/
- this_len = min_t(unsigned long, len, PAGE_CACHE_SIZE - loff);
+ this_len = min_t(unsigned long, len,
+ page_cache_size(mapping) - loff);
page = pages[page_nr];

if (PageReadahead(page))
@@ -408,7 +409,7 @@ fill_it:
* i_size must be checked after PageUptodate.
*/
isize = i_size_read(mapping->host);
- end_index = (isize - 1) >> PAGE_CACHE_SHIFT;
+ end_index = page_cache_index(mapping, isize - 1);
if (unlikely(!isize || index > end_index))
break;

@@ -422,7 +423,7 @@ fill_it:
/*
* max good bytes in this page
*/
- plen = ((isize - 1) & ~PAGE_CACHE_MASK) + 1;
+ plen = page_cache_offset(mapping, isize - 1) + 1;
if (plen <= loff)
break;

@@ -573,12 +574,12 @@ static int pipe_to_file(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
if (unlikely(ret))
return ret;

- index = sd->pos >> PAGE_CACHE_SHIFT;
- offset = sd->pos & ~PAGE_CACHE_MASK;
+ index = page_cache_index(mapping, sd->pos);
+ offset = page_cache_offset(mapping, sd->pos);

this_len = sd->len;
- if (this_len + offset > PAGE_CACHE_SIZE)
- this_len = PAGE_CACHE_SIZE - offset;
+ if (this_len + offset > page_cache_size(mapping))
+ this_len = page_cache_size(mapping) - offset;

find_page:
page = find_lock_page(mapping, index);
@@ -839,7 +840,7 @@ generic_file_splice_write_nolock(struct pipe_inode_info *pipe, struct file *out,
unsigned long nr_pages;

*ppos += ret;
- nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+ nr_pages = page_cache_next(mapping, ret);

/*
* If file or inode is SYNC and we actually wrote some data,
@@ -896,7 +897,7 @@ generic_file_splice_write(struct pipe_inode_info *pipe, struct file *out,
unsigned long nr_pages;

*ppos += ret;
- nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+ nr_pages = page_cache_next(mapping, ret);

/*
* If file or inode is SYNC and we actually wrote some data,
--
1.5.2.4

--