Pull arch/cris updates from Jesper Nilsson:
 "Some much needed love for the CRIS-port.

  There's a bunch of changes this time, giving the CRISv32 port a bit of
  modern makeover with device-tree, irq domain and gpiolib support, and
  more switchover to generic frameworks.

  Some small fixes and removal of the theoretical SMP support brings up
  the rear"

* tag 'cris-for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/jesper/cris:
  cris: fix integer overflow in ELF_ET_DYN_BASE
  CRISv32: use GENERIC_SCHED_CLOCK
  CRISv32: use MMIO clocksource
  CRISv32: use generic clockevents
  CRIS: use generic headers via Kbuild
  CRIS: use generic cmpxchg.h
  CRIS: use generic atomic.h
  CRIS: use generic atomic bitops
  CRISv10: remove redundant macros from system.h
  CRIS: remove SMP code
  CRISv32: don't enable irqs in INIT_THREAD
  CRISv32: handle multiple signals
  CRISv32: prevent bogus restarts on sigreturn
  CRISv32: don't attempt syscall restart on irq exit
  Add binding documentation for CRIS
  CRIS: add Axis 88 board device tree
  CRISv32: add device tree support
  CRISv32: add irq domains support
  CRIS: enable GPIOLIB

Signed-off-by: Richard Weinberger <richard@nod.at>

Almost all arches define ELF_ET_DYN_BASE as 2/3 of TASK_SIZE.
Though it seems that some architectures do this in a wrong way.
The problem is that 2*TASK_SIZE may overflow 32-bits so
the real ELF_ET_DYN_BASE becomes wrong.
Fix this overflow by dividing TASK_SIZE prior to multiplying:
	(TASK_SIZE / 3 * 2)

Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Signed-off-by: Jesper Nilsson <jespern@axis.com>

Delete headers which do nothing but include the asm-generic versions and
use Kbuild magic instead.

Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Jesper Nilsson <jespern@axis.com>

CRIS can use asm-generic's cmpxchg.h

Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Jesper Nilsson <jespern@axis.com>

CRIS can use asm-generic's atomic.h.

Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Jesper Nilsson <jespern@axis.com>

The generic atomic bitops are the same as the CRIS-specific ones.

Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Jesper Nilsson <jespern@axis.com>

All of these are either unused or already provided by other headers, so
they can be removed.

Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Jesper Nilsson <jespern@axis.com>

The CRIS SMP code cannot be built since there is no (and appears to
never have been) a CONFIG_SMP Kconfig option in arch/cris/.  Remove it.

Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Jesper Nilsson <jespern@axis.com>

INIT_THREAD enables interrupts in the thread_struct's saved flags.  This
means that interrupts get enabled in the middle of context_switch()
while switching to new tasks that get forked off the init task during
boot.  Don't do this.

Fixes the following splat on boot with spinlock debugging on:

  BUG: spinlock cpu recursion on CPU#0, swapper/2
   lock: runqueues+0x0/0x47c, .magic: dead4ead, .owner: swapper/0,
  .owner_cpu: 0
  CPU: 0 PID: 2 Comm: swapper Not tainted 3.19.0-08796-ga747b55 #285

  Call Trace:
  [<c0032b80>] spin_bug+0x2a/0x36
  [<c0032c98>] do_raw_spin_lock+0xa2/0x126
  [<c01964b0>] _raw_spin_lock+0x20/0x2a
  [<c00286c8>] scheduler_tick+0x22/0x76
  [<c003db2c>] update_process_times+0x5e/0x72
  [<c0007a94>] timer_interrupt+0x4e/0x6a
  [<c00378d6>] handle_irq_event_percpu+0x54/0xf2
  [<c00379c4>] handle_irq_event+0x50/0x74
  [<c003988e>] handle_simple_irq+0x6c/0xbe
  [<c0037270>] generic_handle_irq+0x2a/0x36
  [<c0004c40>] do_IRQ+0x38/0x84
  [<c000662e>] crisv32_do_IRQ+0x54/0x60
  [<c0006204>] IRQ0x4b_interrupt+0x34/0x3c
  [<c0192baa>] __schedule+0x24a/0x532
  [<c00056b4>] ret_from_kernel_thread+0x0/0x14

Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Jesper Nilsson <jespern@axis.com>