Proportional Rate Reduction for TCP.

This patch implements Proportional Rate Reduction (PRR) for TCP.
PRR is an algorithm that determines TCP's sending rate in fast
recovery. PRR avoids excessive window reductions and aims for
the actual congestion window size at the end of recovery to be as
close as possible to the window determined by the congestion control
algorithm. PRR also improves accuracy of the amount of data sent
during loss recovery.

The patch implements the recommended flavor of PRR called PRR-SSRB
(Proportional rate reduction with slow start reduction bound) and
replaces the existing rate halving algorithm. PRR improves upon the
existing Linux fast recovery under a number of conditions including:
  1) burst losses where the losses implicitly reduce the amount of
outstanding data (pipe) below the ssthresh value selected by the
congestion control algorithm and,
  2) losses near the end of short flows where application runs out of
data to send.

As an example, with the existing rate halving implementation a single
loss event can cause a connection carrying short Web transactions to
go into the slow start mode after the recovery. This is because during
recovery Linux pulls the congestion window down to packets_in_flight+1
on every ACK. A short Web response often runs out of new data to send
and its pipe reduces to zero by the end of recovery when all its packets
are drained from the network. Subsequent HTTP responses using the same
connection will have to slow start to raise cwnd to ssthresh. PRR on
the other hand aims for the cwnd to be as close as possible to ssthresh
by the end of recovery.

A description of PRR and a discussion of its performance can be found at
the following links:
- IETF Draft:
    http://tools.ietf.org/html/draft-mathis-tcpm-proportional-rate-reduction-01
- IETF Slides:
    http://www.ietf.org/proceedings/80/slides/tcpm-6.pdf
    http://tools.ietf.org/agenda/81/slides/tcpm-2.pdf
- Paper to appear in Internet Measurements Conference (IMC) 2011:
    Improving TCP Loss Recovery
    Nandita Dukkipati, Matt Mathis, Yuchung Cheng

Signed-off-by: Nandita Dukkipati <nanditad@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit a262f0cdf1f2916ea918dc329492abb5323d9a6c)
OMAP2+: clock: Fix DPLL clock rounding

Function omap2_dpll_round_rate() succeeds only if it can find exact frequency.
But in current implmentations there are some frequencies that can't be rounded.
Function iterates frequencies that always lower than requested one.
For example 550MHz can be obtain from 38.4MHz reference by M=1375 and N=96,
but the closest MN pair that is tried is 1374/96.

It happens because of flooring scaled_rt_rp variable insted of rounding.
This patch should fix the issue.

Change-Id: Iceadcc695ac3376372b2fdaf29afe8f9454b891f
Signed-off-by: Taras Kondratiuk <taras@ti.com>
(cherry picked from commit 6f1c683adc7834a456e48fbcc0a2259c5ebb2d8b)
staging: drivers: lowmemorykiller: make the driver less aggressive.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
drivers: misc: sound_control: make sure the volume_boost is written into the codec's register. Also remove high_performance mode from the sysfs driver and make it enabled by default via driver init.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Auto detects if its a charger in the OTG cable, if it is, charges, if it isnt, uses default OTG. - all work from caioketo

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
block: deadline: disable front_merging.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>