linux-toradex.git/kernel, branch tegra-l4t-r21.6

watchdog: use FIQ WDT for soft lockup stack dump

2015-06-08T19:01:04+00:00

Using Tegra WDT to trigger FIQ when system is in soft lockup.

Bug 1581432

Change-Id: I853a88a3f6e9402c978db18c5a63e903c582040a
Signed-off-by: Renn Wu 
Reviewed-on: http://git-master/r/265871
(cherry picked from commit f115f435d471af22ddec5e9d969662f79193f846)
Reviewed-on: http://git-master/r/680353
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bibek Basu 
Reviewed-by: Winnie Hsu

cpu: enhance power efficiency

2014-06-24T11:48:08+00:00

Here we are trying to reduce power usage through the
use of macros cpu_relaxed_read and relaxed version of
idle_cpu().

Bug 1440421

Change-Id: I0a8c5d358c154782b41570059d03d7e0de87e82c
Signed-off-by: Sumit Singh 
Reviewed-on: http://git-master/r/426485
Reviewed-by: Sri Krishna Chowdary 
GVS: Gerrit_Virtual_Submit
Reviewed-by: Alexander Van Brunt

sched: defining relaxed version of idle_cpu

2014-06-24T11:48:07+00:00

Defining relaxed version of idle_cpu, which uses
macro cpu_relaxed_read_long, that will be used to
enhance power efficiency.

bug 1440421

Change-Id: I6ba2185632ad0fba766a2548b0ddac743defb1b9
Signed-off-by: Sumit Singh 
Reviewed-on: http://git-master/r/426484
Reviewed-by: Sri Krishna Chowdary 
GVS: Gerrit_Virtual_Submit
Reviewed-by: Alexander Van Brunt

smp: enhance power efficiency

2014-06-24T11:48:06+00:00

Here we are trying to reduce power usage through the
use of macros cpu_relaxed_read_short and cpu_relaxed_read.

Bug 1440421

Change-Id: I114d122cf58b1cf7b93b4b5f5d712360a2f1e096
Signed-off-by: Sumit Singh 
Reviewed-on: http://git-master/r/425947
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Sri Krishna Chowdary 
GVS: Gerrit_Virtual_Submit
Reviewed-by: Alexander Van Brunt

futex : Forbid uaddr == uaddr2 in futex_requeue(..., requeue_pi=1)

2014-06-20T23:28:29+00:00

Bug 200012742

futex-prevent-requeue-pi-on-same-futex.patch futex: Forbid uaddr == uaddr2 in futex_requeue(..., requeue_pi=1)

If uaddr == uaddr2, then we have broken the rule of only requeueing from
a non-pi futex to a pi futex with this call.  If we attempt this, then
dangling pointers may be left for rt_waiter resulting in an exploitable
condition.

This change brings futex_requeue() in line with futex_wait_requeue_pi()
which performs the same check as per commit 6f7b0a2a5c0f ("futex: Forbid
uaddr == uaddr2 in futex_wait_requeue_pi()")

[ tglx: Compare the resulting keys as well, as uaddrs might be
  	different depending on the mapping ]

Fixes CVE-2014-3153.

Reported-by: Pinkie Pie
Signed-off-by: Will Drewry 
Signed-off-by: Kees Cook 
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Gleixner 
Reviewed-by: Darren Hart 
Signed-off-by: Linus Torvalds 
Change-Id: I98b5f95d3f5c9e4d35c3aeec22960fdb34731c18
Reviewed-on: http://git-master/r/424612
Reviewed-by: Bharat Nihalani 
Tested-by: Bharat Nihalani

Merge commit 'refs/changes/82/419382/1' of ssh://git-master:12001/linux-3.10 into promotion_build

2014-06-10T14:15:56+00:00

Change-Id: I9418a05ad5c56b2e902249218bac2fa594d99f56

introduce for_each_thread() to replace the buggy while_each_thread()

2014-06-05T13:17:33+00:00

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.

Bug 200004307

Signed-off-by: Oleg Nesterov 
Reviewed-by: Sergey Dyasly 
Tested-by: Sergey Dyasly 
Reviewed-by: Sameer Nanda 
Acked-by: David Rientjes 
Cc: "Eric W. Biederman" 
Cc: Frederic Weisbecker 
Cc: Mandeep Singh Baines 
Cc: "Ma, Xindong" 
Cc: Michal Hocko 
Cc: "Tu, Xiaobing" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
(cherry picked from commit 0c740d0afc3bff0a097ad03a1c8df92757516f5c)
Signed-off-by: Sri Krishna chowdary 
Change-Id: Id689cb1383ceba2561b66188d88258619b68f5c6
Reviewed-on: http://git-master/r/419041
Reviewed-by: Bharat Nihalani

Merge branch 'linux-3.10.40' into rel-21

2014-06-05T08:07:37+00:00

Bug 200004122

Conflicts:
	drivers/cpufreq/cpufreq.c
	drivers/regulator/core.c
	sound/soc/codecs/max98090.c

Change-Id: I9418a05ad5c56b2e902249218bac2fa594d99f56
Signed-off-by: Ishan Mittal

Merge commit 'refs/changes/16/411516/5' of ssh://git-master:12001/linux-3.10 into promotion_build

2014-05-30T06:28:18+00:00

Merge branch 'android-3.10' into rel-21

2014-05-29T07:11:59+00:00

Bug 200004122
Bug 1511804
This merge takes AOSP commits from android-3.10 branch

Change-Id: I07ec2468114db0366d63777142c9572bbfadbc45
Signed-off-by: Ishan Mittal