Summary of files:
>fdtable.txt:
 o Describes change to struct files_struct. The most important change
   is the removal of the max_fdset limit and the re-organization of
   certain fields into struct fdtable.
>open_private_file.txt:
 o Before, calls to initialize a new struct file were done using
   init_private_file().
   Calls to init_private_file() were replaced by open_private_file().
   This file recommends that calls to open_private_file() be replaced
   by dentry_open().
>pipe_changes.txt:
 o Those looking to extend crak-2.6.25.6 to handle pipe fds should take
   careful note of this file and its implications.
   Previously, the inode structure had a pipe portion that was limited
   to a single circular buffer with a base, a len, and certain PIPE_X
   macros. Since linux-2.6.11, the PIPE_X macros have been removed,
   and the pipes have been re-implemented as multiple circular buffers.
   Look up Torvald's article on http://www.lwn.net/ for more details.