lib/memcopy: use glibc version

the kernel's memcpy and memmove is very inefficient. But the glibc version is
quite fast, in some cases it is 10 times faster than the kernel version. So I
introduce some memory copy macros and functions of the glibc to improve the
kernel version's performance.

The strategy of the memory functions is:
1. Copy bytes until the destination pointer is aligned.
2. Copy words in unrolled loops.  If the source and destination are not
   aligned in the same way, use word memory operations, but shift and merge
   two read words before writing.
3. Copy the few remaining bytes.

Signed-off-by: Miao Xie <miaox*******>
Signed-off-by: faux123 <reioux@gmail.com>
lib/string: use glibc version

the performance of memcpy and memmove of the general version is very
inefficient, this patch improved them.

Signed-off-by: Miao Xie <miaox*******>
Signed-off-by: faux123 <reioux@gmail.com>
lz4: Squashed commits

decompressor: Add LZ4 decompressor module

Date	Tue, 26 Feb 2013 15:24:27 +0900

This patch adds support for LZ4 decompression in the Linux Kernel.
LZ4 Decompression APIs for kernel are based on LZ4 implementation
by Yann Collet.

LZ4 homepage : http://fastcompression.blogspot.com/p/lz4.html
LZ4 source repository : http://code.google.com/p/lz4/

Signed-off-by: Kyungsik Lee <kyungsik.lee@lge.com>

v2:
- Clean up code
- Enable unaligned access for ARM v6 and above with
  CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
- Add lz4_decompress() for faster decompression with
  uncompressed output size

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

lib: Add support for LZ4-compressed kernel

Date	Tue, 26 Feb 2013 15:24:28 +0900

This patch adds support for extracting LZ4-compressed kernel images,
as well as LZ4-compressed ramdisk images in the kernel boot process.

This depends on the patch below
decompressor: Add LZ4 decompressor module

Signed-off-by: Kyungsik Lee <kyungsik.lee@lge.com>

v2:
- Clean up code
- Use lz4_decompress() for LZ4-compressed kernel during boot-process

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

arm: Add support for LZ4-compressed kernel

Date	Tue, 26 Feb 2013 15:24:29 +0900

This patch integrates the LZ4 decompression code to the arm pre-boot code.
And it depends on two patchs below

lib: Add support for LZ4-compressed kernel
decompressor: Add LZ4 decompressor module

Signed-off-by: Kyungsik Lee <kyungsik.lee@lge.com>

v2:
- Apply CFLAGS, -Os to decompress.o to improve decompress
  performance during boot-up process

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

Conflicts:
	arch/arm/boot/compressed/Makefile

Change-Id: If1a0dfc3d25f5202b2de0e5349d8daaa6909d943

lib: Add lz4 compressor module

From	Chanho Min <>

This patch adds support for LZ4 compression in the Linux Kernel.
LZ4 Compression APIs for kernel are based on LZ4 implementation
by Yann Collet and changed with kernel coding style.

LZ4 homepage : http://fastcompression.blogspot.com/p/lz4.html
LZ4 source repository : http://code.google.com/p/lz4/
svn revision : r90

Two APIs are added:
lz4_compress() support basic lz4 compression whereas lz4hc_compress() support
high compression or CPU performance get lower but compression ratio get higher.
Also, we require the pre-allocated working memory with the defined size and
destination buffer must be allocated with the size of lz4_compressbound.

Signed-off-by: Chanho Min <chanho.min@lge.com>

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

crypto: Add lz4 Cryptographic API

From	Chanho Min <>

This patch adds support for lz4 and lz4hc compression algorithm
using the lib/lz4/* codebase.
Signed-off-by: Chanho Min <chanho.min@lge.com>

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

lib/lz4/lz4_compress: fix macro usage error

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

LZ4: compression/decompression signedness mismatch (v2)

LZ4 compression and decompression functions require different
in signedness input/output parameters: unsigned char for
compression and signed char for decompression.

Change decompression API to require "(const) unsigned char *".

v2: minor coding style fix.

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>

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

defconfig: Enable lz4

Change-Id: I447106abfe87b8cd4b40259735c496c9f9f7f400
defconfig: Don't optimize for size

Change-Id: I666d8665968566243167fe836eb836788a072ba6
intelli_plug: Squashed commits

Credits to Paul Reioux aka faux123

intelli_plug: intelligent hotplug cpu driver with eco mode

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

Conflicts:
	arch/arm/mach-msm/Kconfig
	arch/arm/mach-msm/Makefile

intelli_plug: tweak for faster wakeup from suspend

bump version to 1.1

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

intelli_plug: increase cores on persistence

also replace hardcoded values with Macros for ease of updating later

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

intelli_plug: make it gcc-4.6.x eabi compatible :p

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

intelli_plug: use rq_stats to help detect artificial or constant loads

benchmarks often create fake / artificial loads at a constant rate.  These
type of loads are not detected corectly by run average algorithms. Use
the run queue stats to help detect these cases and bring up the cores in
correspondence.

bump version to 1.2

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

intelli_plug: use mp_decision() algorithm for core 3 and 4

This replaces the simplistic check for run queue thresholds with a more
sophisticate algorithm with time awareness

bump version to 1.3

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

intelli_plug: tweak mp_decsion parameters and remove unused logic

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

intelli_plug: bump threshold slightly for better response

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

wip: intelli_plug: change logic for better benchmark performance

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

intelli_plug: use mp_decision to reduce online persistence count for cores

this should bring down the cores faster when run queue is low
also optimized code a bit using local vars

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

intelli_plug: disable by default

let the user enable via sysfs so it won't clash with mpdecision which is
enabled by default for qualcomm phones

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

intelli_plug: slow down hotplug activity from 50ms to 200ms

this will reduce the hotplug chaos which may in turn save more power

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

Conflicts:
	arch/arm/mach-msm/intelli_plug.c

intelli_plug: code clean up and minor bug fixes

bump to version 1.6

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

intelliplug: replaced deprecated early_suspend driver with userspace interface

early_suspend has been deprecated, so move original functionality to sysfs
interfae and have userspace app to replicate the early_suspend functionality

bump version to 1.7

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

intelli_plug: add dynamic load sampling rate logic

Add dynamic sampling logic based on load. If load is high and required more
than 2 cores, increase the sampling rate for a duration of 3 seconds to help
manage the load better during this time.  Once duration expires, revert back
to lazier sampling rate for better batter performance.

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

intelli_plug: add new power_suspend PM driver

bump version to 1.9

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

intelli_plug: add touch input logic

changed intelli_plug sampling rates and bump to version 2.0

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

intelli_plug: use a context safe function call instead

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

intelli_plug: performance tune-up continued...

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

intelli_plug.c: enable touch boost for Moto G touch screen

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

intelli_plug: switch to use dedicated high priority workqueue

from the shared global workqueue.  This should prevent hang ups while the
global workqueue is busy and cleaned up some logic issues.

give input boost its own workqueue

bump to version 2.2

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

intelli_plug: code review clean up

set def sampling rate to something sane rather than zero (instantaneous
rescheduling is not good if intelli_plug is disabled)

make touch input more generic rather than tied to a touchscreen driver

remove unused code

thanks to @dorimanx for the code reviews and suggestions

bump to version 2.3

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

Conflicts:
	arch/arm/mach-msm/intelli_plug.c

Intelli_plug: add wakeup cpufreq boost for quicker wakeup

bump version to 2.4

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

intelli_plug: add screen off max controls

bump to version 2.5

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

intelli_plug: add parameter to control touch boost on/off

bump version to 2.6

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

intelli_plug: refactor stats calculation code to be less intrusive

this is done for those kernels which do not have 100% source code available
and must use existing closed source modules such as wifi drivers

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

intelli_plug: add profiles support and misc code optimization

bump to version 3.0

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

Intelli_plug: kernel sched/core: add per cpu nr_running stats

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

intelli_plug: use per cpu nr_runnings stats for unplugging cores

bump version to 3.1

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

intelli_plug: allow cpu_nr_running_threshold to be user adjustable

bump version to 3.2

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

intelli_plug: tweak cpu_nr_running threshold

and fix minor logic issues

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

intelli_plug: remove legacy msm_rq based code

just use the original algorithm based on nr_running_stats

bump version to 3.3

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

intelli_plug: add nr_running_thresholds based on thread capacity of SOC type

instead of hard coded nr_running_thresholds, perform compile time calculation
of thresholds based on thread capacity of SOC types.

bump version to 3.4

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

intelli_plug: misc minor code fixup post 3.4 update

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

intelli_plug: add automatic dual-core initializations

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

intelli_plug: deprecate eco mode. replaced by built-in profile

bump version to 3.5

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

intelli_plug: add eco-extreme profile for more dual core use options

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

intelli_plug: post 3.5 tweaks and code clean up

bump to version 3.6

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

intelli_plug: move to its own directory. It's been cross platform for a while

intelli_plug driver has been working on OMAP44xx, TEGRA 3, Exynos and
MSM Krait/Cortex multi-core SOCs.  So it doesn't make sense to patch on a per
SOC basis, move it to its own ARM platform independent folder so patches can
apply to all supported ARM platforms

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

Conflicts:
	arch/arm/mach-msm/Kconfig
	arch/arm/mach-msm/Makefile

intelli_plug: unify powersuspend and earlysuspend drivers

also minor clean up on the persist logic

bump to version 3.7

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

intelli_plug: adjust thread capacity for Cortex A7 SOCs

Cortex A7 is much weaker than Krait processors

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

intelli_plug: fix thread capacity threshold calculation

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

intelli_plug: fix logic error for eco mode profiles

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

intelli_plug: only apply suspend/resume logic if active

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

intelli_plug: fix incorrect cpufreq API usage

This resolves the wakeup kick and screen off max issues

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

intelli_plug: initialize ip_info struct element during driver init

this will eliminate race issues

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

intelli_plug: use primary CPU's info data for non-boot cpu's settings

Async CPU design has caused quite a bit of grief for controlling cpu
frequencies

bump to version 3.8

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

intelli_plug: older Qualcomm kernel compatibility fixup

ARGH... really angry at CAF code.

some cpufreq driver APIs are incredibly unstable with some of the older
MSM kernels.  The correct way is the fix the cpufreq drivers, but there are
tons of variations out there, so rather than depending on a fix, make
intelli_plug more universal by avoiding the troubling APIs altogether

Change-Id: I799214a76f707301c5d4a5c65df54dfeb9af788b
Signed-off-by: Paul Reioux <reioux@gmail.com>
powersuspend: Squashed commits

Credits to Paul Reioux aka faux123

powersuspend: new PM kernel driver for Android w/o early_suspend

Android early_suspend/late_resume PM kernel driver framework has been
deprecated by Google. This new powersuspend PM kernel driver is a replacement
for it and existing early_suspend drivers can be easily adapted to use this
new replacement driver

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

Conflicts:

	kernel/power/Kconfig

powersuspend: fix logci derps :p

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

kernel/power/powersuspend: remove userspace dependency from powersuspend

make powersuspend not depend on a userspace initiator anymore, but use a hook
in autosleep instead.

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

kernel/power/powersuspend: add back userpace control w/ default kernel control

make kernel / userspace mode switchable

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

kernel/power/powersuspend: default to userspace for now

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

kernel/power/powersuspend: LCD screen on/off hooks (Yank555.lu)

- add an alternative hook for screen on / off detection in the display
  pannel driver
- sleeps  ~0.1s sooner, wakes up ~1s later then autosleep
- clean up source formatting a bit (Paul Reioux)

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

mdss_dsi_panel.c: add powersuspend hooks

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

Conflicts:
	drivers/video/msm/mdss/mdss_dsi_panel.c

Conflicts:
	drivers/video/msm/mdss/mdss_dsi_panel.c

Change-Id: I2211a51a21766e9c1c5e270fb89e77b25d77d16b

drivers/video/msm/mdss/mdss_dsi_panel.c: update powersuspend hook calls

fix typo!

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

kernel/power/powersuspend: cumulative update to version 1.5

- fix hybrid-kernel mode cannot be set through sysfs

kernel/power/powersuspend: new PM kernel driver for Android w/o early_suspend v1.4 (Yank555.lu)

- add hybrid-kernel mode (autosleep and panel, first wins)
- default to hybrid-kernel mode
- harmonize debug message with my other stuff
- include all 3 modes as default, so it's only commenting out to change

kernel/power/powersuspend: new PM kernel driver for Android w/o early_suspend v1.3 (Yank555.lu)

- fix stupid typo
- add an alternative hook for screen on / off detection in the display panel driver
(sleeps ~0.1s sooner, wakes up ~1s later then autosleep)

kernel/power/powersuspend: new PM kernel driver for Android w/o early_suspend v1.2 (Yank555.lu)

- make kernel / userspace mode switchable

kernel/power/powersuspend: new PM kernel driver for Android w/o early_suspend v1.1 (Yank555.lu)

- make powersuspend not depend on a userspace initiator anymore, but use a hook in autosleep instead.

kernel/power/powersuspend: new PM kernel driver for Android w/o early_suspend (faux123)

Android early_suspend/late_resume PM kernel driver framework has been
deprecated by Google. This new powersuspend PM kernel driver is a replacement
for it and existing early_suspend drivers can be easily adapted to use this
new replacement driver

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