2.3.48

 mm

diff -u --recursive --new-file v2.3.47/linux/mm/filemap.c linux/mm/filemap.c
--- v2.3.47/linux/mm/filemap.c   Sun Feb 20 21:12:40 2000
+++ linux/mm/filemap.c   Mon Feb 21 11:27:23 2000
@@ -1321,8 +1321,7 @@
     * of the file is an error and results in a SIGBUS, while a
     * private mapping just maps in a zero page.
     */
-   if ((pgoff >= size) &&
-      (area->vm_flags & VM_SHARED) && (area->vm_mm == current->mm))
+   if ((pgoff >= size) && (area->vm_mm == current->mm))
       return NULL;
 
    /*
@@ -1431,33 +1430,6 @@
    return NULL;
 }
 
-/*
- * Tries to write a shared mapped page to its backing store. May return -EIO
- * if the disk is full.
- */
-static inline int do_write_page(struct inode * inode, struct file * file,
-   struct page * page, unsigned long index)
-{
-   int retval;
-   int (*writepage) (struct dentry *, struct page *);
-
-   /* refuse to extend file size.. */
-   if (S_ISREG(inode->i_mode)) {
-      unsigned long size_idx = (inode->i_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
-
-      /* Ho humm.. We should have tested for this earlier */
-      if (size_idx <= index)
-         return -EIO;
-   }
-   writepage = inode->i_mapping->a_ops->writepage;
-   lock_page(page);
-
-   retval = writepage(file->f_dentry, page);
-
-   UnlockPage(page);
-   return retval;
-}
-
 static int filemap_write_page(struct file *file,
                unsigned long index,
                struct page * page,
@@ -1476,7 +1448,9 @@
     * vma/file is guaranteed to exist in the unmap/sync cases because
     * mmap_sem is held.
     */
-   result = do_write_page(inode, file, page, index);
+   lock_page(page);
+   result = inode->i_mapping->a_ops->writepage(dentry, page);
+   UnlockPage(page);
    return result;
 }