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NFS: Cleanup: add common helper nfs_page_length()

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Clean up a lot of ad-hoc page length calculations in fs/nfs/write.c

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust
2006-12-05 00:35:38 -05:00
parent 277459d2e2
commit 49a70f2786
3 changed files with 31 additions and 63 deletions
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21
fs/nfs/read.c
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@@ -30,6 +30,7 @@
#include <asm/system.h>
#include "internal.h"
#include "iostat.h"
#define NFSDBG_FACILITY NFSDBG_PAGECACHE
@@ -83,22 +84,6 @@ void nfs_readdata_release(void *data)
nfs_readdata_free(data);
}
static
unsigned int nfs_page_length(struct inode *inode, struct page *page)
{
loff_t i_size = i_size_read(inode);
unsigned long idx;
if (i_size <= 0)
return 0;
idx = (i_size - 1) >> PAGE_CACHE_SHIFT;
if (page->index > idx)
return 0;
if (page->index != idx)
return PAGE_CACHE_SIZE;
return 1 + ((i_size - 1) & (PAGE_CACHE_SIZE - 1));
}
static
int nfs_return_empty_page(struct page *page)
{
@@ -231,7 +216,7 @@ static int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode,
struct nfs_page *new;
unsigned int len;
len = nfs_page_length(inode, page);
len = nfs_page_length(page);
if (len == 0)
return nfs_return_empty_page(page);
new = nfs_create_request(ctx, inode, page, 0, len);
@@ -667,7 +652,7 @@ readpage_async_filler(void *data, struct page *page)
unsigned int len;
nfs_wb_page(inode, page);
len = nfs_page_length(inode, page);
len = nfs_page_length(page);
if (len == 0)
return nfs_return_empty_page(page);
new = nfs_create_request(desc->ctx, inode, page, 0, len);