Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Wrap the test for pagefault_disabled() into a helper, this allows us
to remove the need for current->pagefault_disabled on !-rt kernels.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-3yy517m8zsi9fpsf14xfaqkw@git.kernel.org

Necessary for decoupling pagefault disable from preempt count.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Coccinelle based conversion.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

altroot support has been gone for years, along with arch/*/asm/namei.h;
looks like a dummy survivor that sat it out in microblaze tree...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

* 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux: (230 commits)
  Revert "tracing: Include module.h in define_trace.h"
  irq: don't put module.h into irq.h for tracking irqgen modules.
  bluetooth: macroize two small inlines to avoid module.h
  ip_vs.h: fix implicit use of module_get/module_put from module.h
  nf_conntrack.h: fix up fallout from implicit moduleparam.h presence
  include: replace linux/module.h with "struct module" wherever possible
  include: convert various register fcns to macros to avoid include chaining
  crypto.h: remove unused crypto_tfm_alg_modname() inline
  uwb.h: fix implicit use of asm/page.h for PAGE_SIZE
  pm_runtime.h: explicitly requires notifier.h
  linux/dmaengine.h: fix implicit use of bitmap.h and asm/page.h
  miscdevice.h: fix up implicit use of lists and types
  stop_machine.h: fix implicit use of smp.h for smp_processor_id
  of: fix implicit use of errno.h in include/linux/of.h
  of_platform.h: delete needless include <linux/module.h>
  acpi: remove module.h include from platform/aclinux.h
  miscdevice.h: delete unnecessary inclusion of module.h
  device_cgroup.h: delete needless include <linux/module.h>
  net: sch_generic remove redundant use of <linux/module.h>
  net: inet_timewait_sock doesnt need <linux/module.h>
  ...

Fix up trivial conflicts (other header files, and  removal of the ab3550 mfd driver) in
 - drivers/media/dvb/frontends/dibx000_common.c
 - drivers/media/video/{mt9m111.c,ov6650.c}
 - drivers/mfd/ab3550-core.c
 - include/linux/dmaengine.h

For access to the EXPORT_SYMBOL variants and THIS_MODULE macros.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

* 'next' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: Remove __ARCH_WANT_INTERRUPTS_ON_CTXSW usage
  microblaze: Use delay slot in __strnlen_user, __strncpy_user
  microblaze: Remove NET_IP_ALIGN from system.h
  microblaze: Add __ucmpdi2() helper function
  microblaze: Raise SIGFPE/FPE_INTDIV for div by zero
  microblaze: Switch ELF_ARCH code to 189
  microblaze: Added DMA sync operations
  microblaze: Moved __dma_sync() to dma-mapping.h
  microblaze: Add PVR for Microblaze v8.20.a
  microblaze: Fix access_ok macro
  microblaze: Add loop unrolling for PAGE in copy_tofrom_user
  microblaze: Simplify logic for unaligned byte copying
  microblaze: Change label names - copy_tofrom_user
  microblaze: Separate fixup section definition
  microblaze: Change label name in copy_tofrom_user
  microblaze: Clear top bit from cnt32_to_63

As far as I can tell the only reason microblaze has
__ARCH_WANT_INTERRUPTS_ON_CTXSW is because it initializes new task state
with interrupts enabled so that on switch_to() interrupts get enabled.

So change copy_thread() to clear MSR_IE instead of set it, this will
ensure switch_to() will always keep IRQs disabled.

The scheduler will disable IRQs when taking rq->lock in schedule() and
enable IRQs in finish_lock_switch() after its done its magic.

This leaves ARM the only __ARCH_WANT_INTERRUPTS_ON_CTXSW user.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Michal Simek <monstr@monstr.eu>

Use delay slot to speedup if maxlen is zero.

Signed-off-by: Michal Simek <monstr@monstr.eu>