enable oc
add vdd sysfs
clean up
sound hack
build optimizations
sched: LOAD_FREQ (4*HZ+61)
Add frandom(/dev/frandom) -Fast kernel number generator-link : http://billauer.co.il/frandom.html
random tweaks
[CPU] Allow CPU-based alignment handling
lowering vfs_cache_pressure
ARM: Add optimised swahb32() byteswap helper for v6 and above
ARMv6 and later processors have the REV16 instruction, which swaps
the bytes within each halfword of a register value.

This is already used to implement swab16(), but since the native
operation performaed by REV16 is actually swahb32(), this patch
renames the existing swab16() helper accordingly and defines
__arch_swab16() in terms of it.  This allows calls to both swab16()
and swahb32() to be optimised.

The compiler's generated code might improve someday, but as of
4.5.2 the code generated for pure C implementing these 16-bit
bytesswaps remains pessimal.

swahb32() is useful for converting 32-bit Thumb instructions
between integer and memory representation on BE8 platforms (among
other uses).
compressed/head.S: work around new binutils warning
Asynchronous I/O latency to a solid-state disk greatly increased betw…
…een 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.
rwsem: steal writing sem for better performance
Commit 5a50508 changes to rwsem from mutex, caused aim7 fork_test
performance to dropped 50%. Yuanhan liu did an analysis, found it was
caused by strict sequential writing. Ingo suggest stealing sem writing from
front task in wait queue. https://lkml.org/lkml/2013/1/29/84

So does this patch.
In this patch, I just allow write stealing to happen when the first waiter
is also writer. The performance fully is now fully recovered.
CONFIG_HZ = 300 much faster and flued
update defconfigs
fix possible mem leaks
fix possible mem leak (part 2)
Added optimized ARM RWSEM algorithm.
increase readahead to 1024