Building scripts sabermod arm eabi 4.8.3
Updated cleaning scripts sabermod arm eabi gcc 4.8.3
introduce for_each_thread() to replace the buggy while_each_thread()

while_each_thread() and next_thread() should die, almost every lockless
usage is wrong.

1. Unless g == current, the lockless while_each_thread() is not safe.

   while_each_thread(g, t) can loop forever if g exits, next_thread()
   can't reach the unhashed thread in this case. Note that this can
   happen even if g is the group leader, it can exec.

2. Even if while_each_thread() itself was correct, people often use
   it wrongly.

   It was never safe to just take rcu_read_lock() and loop unless
   you verify that pid_alive(g) == T, even the first next_thread()
   can point to the already freed/reused memory.

This patch adds signal_struct->thread_head and task->thread_node to
create the normal rcu-safe list with the stable head.  The new
for_each_thread(g, t) helper is always safe under rcu_read_lock() as
long as this task_struct can't go away.

Note: of course it is ugly to have both task_struct->thread_node and the
old task_struct->thread_group, we will kill it later, after we change
the users of while_each_thread() to use for_each_thread().

Perhaps we can kill it even before we convert all users, we can
reimplement next_thread(t) using the new thread_head/thread_node.  But
we can't do this right now because this will lead to subtle behavioural
changes.  For example, do/while_each_thread() always sees at least one
task, while for_each_thread() can do nothing if the whole thread group
has died.  Or thread_group_empty(), currently its semantics is not clear
unless thread_group_leader(p) and we need to audit the callers before we
can change it.

So this patch adds the new interface which has to coexist with the old
one for some time, hopefully the next changes will be more or less
straightforward and the old one will go away soon.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Sergey Dyasly <dserrg@gmail.com>
Tested-by: Sergey Dyasly <dserrg@gmail.com>
Reviewed-by: Sameer Nanda <snanda@chromium.org>
Acked-by: David Rientjes <rientjes@google.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mandeep Singh Baines <msb@chromium.org>
Cc: "Ma, Xindong" <xindong.ma@intel.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: "Tu, Xiaobing" <xiaobing.tu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Paul Reioux <reioux@gmail.com>

backported to Linux 3.4

Conflicts:
	kernel/fork.c
Merge sched with the one inside Yuri branch
small correction for other cpu governors
New official AOSP Kernel released
Added building scripts for Sabermod 4.10
Fixed a mess with POWER_SUSPEND, EARLY_SUSPEND definition
alucard_hotplug: created option to compile core thermal control
Limit freq for all cpus during gps using
Implemented CPUFREQ_LIMIT_MANAGER FOR GPS, ON CALL, SUSPEND USING
cpufreq_limit_manager: Small corrections. Removed mutex.
cpufreq_limit_manager: small correction for min_freq different from suspend freq
alucard_hotplug: Memory optimization removing a pointer. Reset hotplugging rate after cpu hotplugging
alucard_hotplug: some optimizations
DVFS BOOSTER: queue work on system_power_efficient_wq.
Revert "Replace the offending argument earlier in the boot process by FennyFatal."

This reverts commit cde2eacfc752331b668a3e74544c78a0fe200407.