mpdec: FIX BUG#27

Unplugging a boosted CPU will cause it to come back with
the boosted minimum frequency and stay on it.
(it gets stuck on boost)

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
mpdec: if !scroff_single_core unboost all cpus while suspending

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
ext4: add support for read_iter and write_iter

use the generic_file_read_iter(), create ext4_file_write_iter() based on
ext4_file_write(), and make ext4_file_write() a wrapper around
ext4_file_write_iter().

Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Cc: Zach Brown <zab@zabbo.net>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: linux-ext4@vger.kernel.org
modified for Mako from LKML reference

Signed-off-by: faux123 <reioux@gmail.com>