hostfs: Use page_offset()

The kernel offers a helper function for that, use it.

Signed-off-by: Richard Weinberger <richard@nod.at>

1 files changed, 2 insertions, 4 deletions

diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index f1547479e62e..f82f98a517f7 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -410,7 +410,7 @@ static int hostfs_writepage(struct page *page, struct writeback_control *wbc)
         struct address_space *mapping = page->mapping;
         struct inode *inode = mapping->host;
         char *buffer;
-        unsigned long long base;
+        loff_t base = page_offset(page);
         int count = PAGE_CACHE_SIZE;
         int end_index = inode->i_size >> PAGE_CACHE_SHIFT;
         int err;
@@ -419,7 +419,6 @@ static int hostfs_writepage(struct page *page, struct writeback_control *wbc)
                 count = inode->i_size & (PAGE_CACHE_SIZE-1);
 
         buffer = kmap(page);
-        base = ((unsigned long long) page->index) << PAGE_CACHE_SHIFT;
 
         err = write_file(HOSTFS_I(inode)->fd, &base, buffer, count);
         if (err != count) {
@@ -444,10 +443,9 @@ static int hostfs_writepage(struct page *page, struct writeback_control *wbc)
 static int hostfs_readpage(struct file *file, struct page *page)
 {
         char *buffer;
-        long long start;
+        loff_t start = page_offset(page);
         int bytes_read, ret = 0;
 
-        start = (long long) page->index << PAGE_CACHE_SHIFT;
         buffer = kmap(page);
         bytes_read = read_file(FILE_HOSTFS_I(file)->fd, &start, buffer,
                         PAGE_CACHE_SIZE);