lowmemorykiller: Compact memory when killing processes

* Memory compaction is never invoked on Android because we avoid swap
   and don't allocate huge pages. Fix it by invoking compaction from the LMK when
   a process is killed to reduce memory fragmentation.

Change-Id: I2bda790c2093e65fd6f43d52ea5149d6b57cb1e9

Conflicts:

	drivers/staging/android/lowmemorykiller.c
lowmemorykiller: Use asynchronous compaction

Change-Id: I6a65d06fc30b88fcedaaf1abf1855fdd19e3c912
hardlockup: detect hard lockups without NMIs using secondary cpus

Emulate NMIs on systems where they are not available by using timer
interrupts on other cpus.  Each cpu will use its softlockup hrtimer
to check that the next cpu is processing hrtimer interrupts by
verifying that a counter is increasing.

This patch is useful on systems where the hardlockup detector is not
available due to a lack of NMIs, for example most ARM SoCs.
Without this patch any cpu stuck with interrupts disabled can
cause a hardware watchdog reset with no debugging information,
but with this patch the kernel can detect the lockup and panic,
which can result in useful debugging info.

Modified for older 2.6.39 kernel.

Changes since v1:
    renamed variables to clarify when referring to the next cpu
    factored out function to get next cpu
    fixed int vs unsigned int mismatches
    fixed race condition when offlining cpus

Change-Id: I0fc455beb1f249c3041e926d9e10da6a2b6feb9f
Signed-off-by: Colin Cross <ccross@android.com>
Signed-off-by: Takazumi Matsumoto <tdr@cyanogenmod.org>
Enable debugging

And also disable tegra watchdog.
A few devices are plagued by random reboots, so try to recover some
debug information from them.

Change-Id: I998f8e60b3a2974f79f59613fe226fc02ace3053
staging: logger: hold mutex while removing reader

The readers list is traversed under the log->mutex lock
(for example from fix_up_readers()), but the deletion of
elements from this list is not being done under this lock.

Cc: Brian Swetland <swetland@google.com>
Cc: Dima Zavin <dima@android.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
net: wireless: bcmdhd: Update to version 5.90.195.114

- Get AP beacon and DTIM to set proper DTIM skipping

Change-Id: I6bc23f050c144bf8361078ad587bcadbfe3a37fc
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
netfilter: xt_qtaguid: fix error exit that would keep a spinlock.

qtudev_open() could return with a uid_tag_data_tree_lock held
when an kzalloc(..., GFP_ATOMIC) would fail.
Very unlikely to get triggered AND survive the mayhem of running out of mem.

Signed-off-by: JP Abgrall <jpa@google.com>
netfilter: qtaguid: Don't BUG_ON if create_if_tag_stat fails

If create_if_tag_stat fails to allocate memory (GFP_ATOMIC) the
following will happen:

qtaguid: iface_stat: tag stat alloc failed
...
kernel BUG at xt_qtaguid.c:1482!

Signed-off-by: Pontus Fuchs <pontus.fuchs@gmail.com>
netfilter: xt_qtaguid: remove AID_* dependency for access control

qtaguid limits what can be done with /ctrl and /stats based on group
membership.
This changes removes AID_NET_BW_STATS and AID_NET_BW_ACCT, and picks
up the groups from the gid of the matching proc entry files.

Signed-off-by: JP Abgrall <jpa@google.com>
Change-Id: I42e477adde78a12ed5eb58fbc0b277cdaadb6f94
netfilter: xt_qtaguid: extend iface stat to report protocols

In the past the iface_stat_fmt would only show global bytes/packets
for the skb-based numbers.
For stall detection in userspace, distinguishing tcp vs other protocols
makes it easier.
Now we report
  ifname total_skb_rx_bytes total_skb_rx_packets total_skb_tx_bytes
  total_skb_tx_packets {rx,tx}_{tcp,udp,ohter}_{bytes,packets}

Bug: 6818637
Signed-off-by: JP Abgrall <jpa@google.com>
Change-Id: I179c5ebf2fe822acec0bce4973b4bbb5e7d5076d
netfilter: xt_qtaguid: Allow tracking loopback

In the past it would always ignore interfaces with loopback addresses.
Now we just treat them like any other.
This also helps with writing tests that check for the presence
of the qtaguid module.

Signed-off-by: JP Abgrall <jpa@google.com>
net: wireless: bcmdhd: Add SUPPORT_PM2_ONLY option

Change-Id: Ieb2569cb7fb2bbc56ff9abbc8728a7741fda0027
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
Signed-off-by: Takazumi Matsumoto <tdr@cyanogenmod.org>

Conflicts:
	drivers/net/wireless/bcmdhd/dhd_linux.c
i2c: tegra: match grouper

Change-Id: I23b9f53649ed5aeda7d64ac777796d0e4dd751d9