-static void
-unmap_buffers(struct page *page, loff_t pos) {
- struct buffer_head *bh ;
- struct buffer_head *head ;
- struct buffer_head *next ;
- unsigned long tail_index ;
- unsigned long cur_index ;
-
- if (page) {
- if (page_has_buffers(page)) {
- tail_index = pos & (PAGE_CACHE_SIZE - 1) ;
- cur_index = 0 ;
- head = page_buffers(page) ;
- bh = head ;
- do {
- next = bh->b_this_page ;
-
- /* we want to unmap the buffers that contain the tail, and
- ** all the buffers after it (since the tail must be at the
- ** end of the file). We don't want to unmap file data
- ** before the tail, since it might be dirty and waiting to
- ** reach disk
- */
- cur_index += bh->b_size ;
- if (cur_index > tail_index) {
- reiserfs_unmap_buffer(bh) ;
- }
- bh = next ;
- } while (bh != head) ;
- if ( PAGE_SIZE == bh->b_size ) {
- clear_page_dirty(page);
- }
- }
- }
-}
-