Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (63 commits)
  stacktrace: provide save_stack_trace_tsk() weak alias
  rcu: provide RCU options on non-preempt architectures too
  printk: fix discarding message when recursion_bug
  futex: clean up futex_(un)lock_pi fault handling
  "Tree RCU": scalable classic RCU implementation
  futex: rename field in futex_q to clarify single waiter semantics
  x86/swiotlb: add default swiotlb_arch_range_needs_mapping
  x86/swiotlb: add default phys<->bus conversion
  x86: unify pci iommu setup and allow swiotlb to compile for 32 bit
  x86: add swiotlb allocation functions
  swiotlb: consolidate swiotlb info message printing
  swiotlb: support bouncing of HighMem pages
  swiotlb: factor out copy to/from device
  swiotlb: add arch hook to force mapping
  swiotlb: allow architectures to override phys<->bus<->phys conversions
  swiotlb: add comment where we handle the overflow of a dma mask on 32 bit
  rcu: fix rcutorture behavior during reboot
  resources: skip sanity check of busy resources
  swiotlb: move some definitions to header
  swiotlb: allow architectures to override swiotlb pool allocation
  ...

Fix up trivial conflicts in
  arch/x86/kernel/Makefile
  arch/x86/mm/init_32.c
  include/linux/hardirq.h
as per Ingo's suggestions.

1 files changed, 31 insertions, 0 deletions

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index b0f239e443bc..eae594cb6ea9 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -252,6 +252,14 @@ config DEBUG_OBJECTS_TIMERS
           timer routines to track the life time of timer objects and
           validate the timer operations.
 
+config DEBUG_OBJECTS_ENABLE_DEFAULT
+        int "debug_objects bootup default value (0-1)"
+        range 0 1
+        default "1"
+        depends on DEBUG_OBJECTS
+        help
+          Debug objects boot parameter default value
+
 config DEBUG_SLAB
         bool "Debug slab memory allocations"
         depends on DEBUG_KERNEL && SLAB
@@ -545,6 +553,16 @@ config DEBUG_SG
 
           If unsure, say N.
 
+config DEBUG_NOTIFIERS
+        bool "Debug notifier call chains"
+        depends on DEBUG_KERNEL
+        help
+          Enable this to turn on sanity checking for notifier call chains.
+          This is most useful for kernel developers to make sure that
+          modules properly unregister themselves from notifier chains.
+          This is a relatively cheap check but if you care about maximum
+          performance, say N.
+
 config FRAME_POINTER
         bool "Compile the kernel with frame pointers"
         depends on DEBUG_KERNEL && \
@@ -619,6 +637,19 @@ config RCU_CPU_STALL_DETECTOR
 
           Say N if you are unsure.
 
+config RCU_CPU_STALL_DETECTOR
+        bool "Check for stalled CPUs delaying RCU grace periods"
+        depends on CLASSIC_RCU || TREE_RCU
+        default n
+        help
+          This option causes RCU to printk information on which
+          CPUs are delaying the current grace period, but only when
+          the grace period extends for excessive time periods.
+
+          Say Y if you want RCU to perform such checks.
+
+          Say N if you are unsure.
+
 config KPROBES_SANITY_TEST
         bool "Kprobes sanity tests"
         depends on DEBUG_KERNEL