Hi.

This patch adds handling for the error, ESTALE, to the system
calls which take pathnames as arguments.  The algorithm used
is to detect that an ESTALE error has occurred during an
operation subsequent to the lookup process and then to unwind
appropriately and then to perform the lookup process again.
Eventually, either the lookup process will return an error
or a valid dentry/inode combination and then operation can
succeed or fail based on its own merits.

A partial list of the updated system calls are stat, stat64,
lstat, lstat64, mkdir, link, open, access, chmod, chown,
readlink, utime, utimes, chdir, chroot, rename, exec, mknod,
statfs, inotify, setxattr, getxattr, and listxattr.  Due to
common code factoring, other system calls may have been
included too, but were not explicitly tested.

    Thanx...

       ps

Signed-off-by: Peter Staubach <staubach@redhat.com>