Clean up some ARMv4/ARMv5 cruft.

Change-Id: I29e836fea4b53901e29f96c6888869c35f6726be
Clean up the pthread-only atomic stuff a little.

It looks like we can probably just use the generic GCC stuff instead;
the generated code looks pretty similar. We should come back to that.

These routines are only used by the pthread implementation, and
__bionic_atomic_inc isn't used, so we can remove it.

Change-Id: I8b5b8cb30a1b159f0e85c3675aee06ddef39b429
ARM: Change dmb domain for bionic_atomic_barrier()

This patch changes the domain that the memory barrier operates on. Assumes
that the scope of bionic_atomic_barrier() does not include device memory,
memory shared with the GPU or any other memory external to the processor
cluster.

Change-Id: I291e741c98a64c86f3a3cf99811bbf1e714ac9aa
Signed-off-by: Serban Constantinescu <serban.constantinescu@arm.com>
Remove harmful attempts to be helpful in pthread_mutex functions.

Most callers won't check for EINVAL, so it's best to fail early.
GCC takes the nonnull attribute as a guarantee that an argument
won't be NULL, so these hacks were already ineffective, which is
how we found that at least one commercial game was using NULL
as if it's a mutex, but actually getting no-op behavior.

Bug: 11971278
Change-Id: I89646e043d931778805a8b692e07a34d076ee6bf
Revert "Remove harmful attempts to be helpful in pthread_mutex functions."

This reverts commit 53f15d0325feeaf7e58dc79fce4ddf55e0a64b7a.
libc: krait: support KINGFISHER optimized memcpy

When defined use the KINGFISHER optimized
cortex-a9 memcpy instead to improve performance.

Change-Id: Idcfb94cc1e10d8326d7a9e623baed91125d7caf6
Import memchr implementation from cortex-strings for Cortex A15

Benchmarks on a Nexus 10 have shown the cortex-strings implementation
of memchr to be 60%-70% faster (depending on input)

Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>

Change-Id: I72b119905234570e54068375e5c3593d0647c67c
Replace Cortex A15 strlen implementation with cortex-strings

Benchmarks on a Nexus 10 have shown this implementation to be 5%-20%
faster (depending on input)

Change-Id: I4331a390c404a77b1e13909d713c4258a3776bca
Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>
libc: Fix memchr inclusion

Change-Id: I6f374f16b08e19851a375a4abad3e8235f8da59c
libc: Fix memchr inclusion on scorpion

Change-Id: I0f4d31c85c8671be9790feab03469f89520763b7
libc: krait: Fix memmove half-word atomicity

In tailing case of less than 7, if even number of bytes are left, then
use half word load/store to make sure the whole routine is half-word
atomic

Change-Id: I54948ac050ff866986a7e144d4240652981ea87a