Revert most dubius sched patches from the tree.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
cpufreq: interactive: Remove unnecessary cpu_online() check

Cpufreq no longer calls governor callback for offlined cpus. i.e. All
policy->cpus are guaranteed to be online. Hence we don't need explicit check to
see if cpu is online or not.

Change-Id: I9ad85ea4addd5b4a40952e59ed730dd15e328690
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
arm: arch_timer: set memory mapped timer interrupt as IRQF_TIMER

The memory mapped timer is used as a broadcast timer to wake the core for
timer interrupts when the arch timer might not be functional. When interrupt
is not marked as IRQF_NO_SUSPEND, the interrupt gets disabled during the
suspend_device_irqs() callback in the suspend path. If a core were to enter a
idle low power mode which relies on broadcast timer to process the interrupt,
the core is never woken up for timer interrupts.

Mark the interrupt with IRQF_TIMER which marks this interrupt as a timer
interrupt and also marks it as IRQF_NO_SUSPEND

CRs-fixed: 636712
Change-Id: I0484e92a9d05f66a0c5b3c00c584a3dd3fe6ae85
Signed-off-by: Mahesh Sivasubramanian <msivasub@codeaurora.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
rtc: alarm: Proper handling of spinlock

In alarm_shutdown hook, taking interruptible mutex
lock in interrupt disabled context. This patch fixes
alarm_shutdown function to call rtc_read_time and
rtc_set_alarm APIs in interrupt enabled context.

Change-Id: I9392d8908c19365993dccc22504f4b6f83ae8f72
CRs-Fixed: 619657
Signed-off-by: Mohit Aggarwal <maggarwa@codeaurora.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
cma: Remove potential deadlock situation

A report was given of a deadlock situation on the cma_mutex:

mutex_lock(cma_mutex)   (*2)
dma_release_from_contiguous
ion_secure_cma_free_chunk
ion_secure_cma_shrinker
shrink_slab
try_to_free_pages
migrate_pages
alloc_contig_range
mutex_lock(cma_mutex)  (*1)
dma_alloc_from_contiguous
ion_alloc

We may need to free CMA allocations while a current CMA allocation is in
progress if CMA is freed from a shrinker. cma_mutex currently protects
two things: the bitmap indicating which pages are allocated/free and
serialization of isolation/migration calls on allocation. There is
no need to take the mutex on free calls though as the pages are
freed back into the system via the regular __free_page call. Move
the free_contig_range call outside the cma_mutex to break the
chain dependency. We can safely free the pages back into the system
before changing the bitmap without any risk of races.

Change-Id: I4989eb2891e502b08db8117a51bd86652e902778
CRs-Fixed: 619644
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
cma: Make locking finer grained

CMA locking is currently very coarse. The cma_mutex protects both
the bitmap and avoids concurrency with alloc_contig_range. There
are several situations which may result in a deadlock on the CMA
mutex currently, mostly involving AB/BA situations with alloc and
free. Fix this issue by protecting the bitmap with a mutex per CMA
region and use the existing mutex for protecting against concurrency
with alloc_contig_range.

Change-Id: I6863ba7ab7fae07c68fee23b0aa4c869244fe2a1
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Revert "rtc: alarm: Proper handling of spinlock"

This reverts commit 6856549d67cc24b7b68f83e5ab5b828967adc9f7.
regulator: core: if voltage scaling fails, restore original voltage values

Change-Id: I6f41096966aa5e5f9d834049ca9b2ae2d8156285
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>
Tested-by: Robert Nelson <robertcnelson@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Git-commit: 92d7a55879c01b30349045501108e775655a4b92
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
[keliu@codeaurora.org: resolve merge conflicts]
Signed-off-by: Ke Liu <keliu@codeaurora.org>

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>