tegra: lower G min and touch floor min
[PATCH] Restrict slave mountspace so Dalvik apps can mount
 system-wide volumes

Android 4.2 implements multi-user storage using per-process mount
namespaces.  Everything under "/" (the entire filesystem hierarchy) is
marked as a recursive-slave mountspace for all zygote instances.  This is
done so that user-storage sandbox mounts under /storage/emulated are hidden
from other apps and users.

Unfortunately this means that any Dalvik app (actually, any program whose
clone/fork ancestry includes a Dalvik zygote, which is everything except
services spawned directly from init) cannot mount system-wide volumes.
Thus, apps like CifsManager are effectively broken in Android 4.2, since
its cifs mounts are only visible to the CifsManager app itself.  All other
apps see empty mountpoints instead of the mounted volume.  Furthermore,
Linux provides no provision for a process to "escape" a recursive-slave
mountspace in versions prior to Linux 3.8 (setns syscall).

Here, we restrict rootfs-slave calls to /storage (and, due to a possible
kernel bug, /mnt/shell/emulated) so that Dalvik apps can mount system-wide
volumes elsewhere (with appropriate permission, as in earlier versions of
Android), while retaining full multi-user storage compatibility.  It is
made available as a kernel-based workaround for instances where libdvm can
not be modified.

This change requires that a tmpfs volume is mounted as /storage in init.rc.
If this volume is unavailable, then we falls back to the previous behavior
of marking the entire filesystem hierarchy as slave.
Revert "[PATCH] Restrict slave mountspace so Dalvik apps can mount"

This reverts commit 917259881256aaed1b78cf9d844f93ac5aba4874.
Remove 1.9GHz as pll_x was being capped at 1.7GHz anyway. Need to look into later.
block: Add support for reinsert a dispatched req

Add support for reinserting a dispatched request back to the
scheduler's internal data structures.
This capability is used by the device driver when it chooses to
interrupt the current request transmission and execute another (more
urgent) pending request. For example: interrupting long write in order
to handle pending read. The device driver re-inserts the
remaining write request back to the scheduler, to be rescheduled
for transmission later on.

Add API for verifying whether the current scheduler
supports reinserting requests mechanism. If reinsert mechanism isn't
supported by the scheduler, this code path will never be activated.

Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>

Conflicts:

	include/linux/elevator.h
block: Add API for urgent request handling

This patch add support in block & elevator layers for handling
urgent requests. The decision if a request is urgent or not is taken
by the scheduler. Urgent request notification is passed to the underlying
block device driver (eMMC for example). Block device driver may decide to
interrupt the currently running low priority request to serve the new
urgent request. By doing so READ latency is greatly reduced in read&write
collision scenarios.

Note that if the current scheduler doesn't implement the urgent request
mechanism, this code path is never activated.

Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>

Conflicts:

	include/linux/elevator.h
row: Adding support for reinsert already dispatched req

Add support for reinserting already dispatched request back to the
schedulers internal data structures.
The request will be reinserted back to the queue (head) it was
dispatched from as if it was never dispatched.

Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>
row: Add support for urgent request handling

This patch add support for handling urgent requests.
ROW queue can be marked as "urgent". If an urgent queue was
un-served in a previous dispatch cycle and a request was added
to it - it will trigger issuing urgent request to the device driver.

Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>
block: fixes required to make the kernel compile with ROW.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
mach-tegra: use default SOC IDs with overclock
Revert "mach-tegra: edp.c: lower edp freqs to T30L defaults, were upped by SOC hack"

This reverts commit 816a5538650bf13644f764f98c42b7f9c307b9bd.
cpufreq: interactive: update and tweak
mach-tegra: remove OC above 1.7GHz
defconfig: row as default
Add FIFO scheduler

Does not perform any merging or reordering -- pure FCFS.

Signed-off-by: Aaron Carroll <aaronc@gelato.unsw.edu.au>

Conflicts:
	block/Makefile
block: fifo-iosched.c: fix compiling
mach-tegra: tegra3_dvfs.c: fix minor typo
Staging: android: fixed a space warning in binder.h

This patch fixes a simple tab-space warning in binder.h found by checkpatch tool

Signed-off-by: Marco Navarra <fromenglish@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Staging: android: binder: Don't call dump_stack in binder_vma_open

If user-space partially unmaps the driver, binder_vma_open
would dump the kernel stack. This is not a kernel bug however
and will be treated as if the whole area was unmapped once
binder_vma_close gets called.

Signed-off-by: Arve Hjønnevåg <arve@android.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Staging: android: binder: Fix crashes when sharing a binder file between processes

Opening the binder driver and sharing the file returned with
other processes (e.g. by calling fork) can crash the kernel.
Prevent these crashes with the following changes:
- Add a mutex to protect against two processes mmapping the
  same binder_proc.
- After locking mmap_sem, check that the vma we want to access
  (still) points to the same mm_struct.
- Use proc->tsk instead of current to get the files struct since
  this is where we get the rlimit from.

Signed-off-by: Arve Hjønnevåg <arve@android.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>