*** linux/fs/fat/file.orig.c	Thu Mar 30 10:01:53 2000
--- linux/fs/fat/file.c	Thu Mar 30 10:06:20 2000
***************
*** 125,131 ****
  	if (IS_IMMUTABLE(inode))
  		return /* -EPERM */;
  	cluster = SECTOR_SIZE*sbi->cluster_size;
! 	MSDOS_I(inode)->mmu_private = inode->i_size;
  	fat_free(inode,(inode->i_size+(cluster-1))>>sbi->cluster_bits);
  	MSDOS_I(inode)->i_attrs |= ATTR_ARCH;
  	inode->i_ctime = inode->i_mtime = CURRENT_TIME;
--- 125,137 ----
  	if (IS_IMMUTABLE(inode))
  		return /* -EPERM */;
  	cluster = SECTOR_SIZE*sbi->cluster_size;
! 
! 	/* We never increase mmu_private, or else prepare_write won't
! 	 * be able to grow the file.
! 	 */
! 	if (MSDOS_I(inode)->mmu_private > inode->i_size)
! 		MSDOS_I(inode)->mmu_private = inode->i_size;
! 
  	fat_free(inode,(inode->i_size+(cluster-1))>>sbi->cluster_bits);
  	MSDOS_I(inode)->i_attrs |= ATTR_ARCH;
  	inode->i_ctime = inode->i_mtime = CURRENT_TIME;