watchdog: omap_wdt: pet, do not disable, WDT at shutdown

Use WDT to recover from driver shutdown sequences that hang.

Change-Id: Ib794ea8ff7aa8f6f4b7e354f118b0d8f8eb98ddc
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Francisco Franco <franciscofranco.1990@gmail.com>
Signed-off-by: Dan Trifan <jimsth@gmail.com>
arch:arm:mach-omap2: fix some makefile derps

Signed-off-by: Dan Trifan <jimsth@gmail.com>
dynamic fsync: add reboot notifier to force flush outstanding data

this should further prevent data corruption from kernel panics and
forced reboots

bump version to 1.2

Signed-off-by: Paul Reioux <reioux@gmail.com>
Signed-off-by: Dan Trifan <jimsth@gmail.com>

Conflicts:
	fs/dyn_sync_cntrl.c
dynamic fsync: add kernel panic notifier to force flush outstanding data

more paranoia safety checks

Signed-off-by: Paul Reioux <reioux@gmail.com>
Signed-off-by: Dan Trifan <jimsth@gmail.com>
CPU hotplug, writeback: Don't call writeback_set_ratelimit() too often during hotplug

The CPU hotplug callback related to writeback calls writeback_set_ratelimit()
during every state change in the hotplug sequence. This is unnecessary
since num_online_cpus() changes only once during the entire hotplug operation.

So invoke the function only once per hotplug, thereby avoiding the
unnecessary repetition of those costly calculations.

Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Francisco Franco <franciscofranco.1990@gmail.com>
Signed-off-by: Dan Trifan <jimsth@gmail.com>