sched: disable GENTLTE_FAIR_SLEEPERS for better performance on Android
tegra: custom user voltage control  ++++++ possible merge taint

initial implementation inspired by coolbho3k's custom voltage control for
galaxy nexus (OMAP4460)

also added some Processor ID debugging code to properly identify tegra3
variants

Conflicts:
	arch/arm/mach-tegra/tegra3_dvfs.c
	drivers/cpufreq/cpufreq.c

Signed-off-by: DHOMD <DHO@dho.im>
Asynchronous I/O latency to a solid-state disk greatly increased between the 2.6.32 and 3.0 kernels. By removing the plug from do_io_submit(), we observed a 34% improvement in the I/O latency.

Unfortunately, at this level, we don't know if the request is to
a rotating disk or not.

Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Cc: linux-aio@kvack.org
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jeff Moyer <jmoyer@redhat.com>

Conflicts:
	fs/aio.c

Signed-off-by: DHOMD <DHO@dho.im>
Optimized ARM RWSEM algorithm

RWSEM implementation for ARM using atomic functions.
Heavily based on arch/sh/include/asm/rwsem.h

Signed-off-by: Ashwin Chaugule <ashwinc@codeaurora.org>