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, 9 insertions, 4 deletions

diff --git a/include/linux/hardirq.h b/include/linux/hardirq.h
index 89a56d79e4c6..f83288347dda 100644
--- a/include/linux/hardirq.h
+++ b/include/linux/hardirq.h
@@ -119,13 +119,17 @@ static inline void account_system_vtime(struct task_struct *tsk)
 }
 #endif
 
-#if defined(CONFIG_PREEMPT_RCU) && defined(CONFIG_NO_HZ)
+#if defined(CONFIG_NO_HZ) && !defined(CONFIG_CLASSIC_RCU)
 extern void rcu_irq_enter(void);
 extern void rcu_irq_exit(void);
+extern void rcu_nmi_enter(void);
+extern void rcu_nmi_exit(void);
 #else
 # define rcu_irq_enter() do { } while (0)
 # define rcu_irq_exit() do { } while (0)
-#endif /* CONFIG_PREEMPT_RCU */
+# define rcu_nmi_enter() do { } while (0)
+# define rcu_nmi_exit() do { } while (0)
+#endif /* #if defined(CONFIG_NO_HZ) && !defined(CONFIG_CLASSIC_RCU) */
 
 /*
  * It is safe to do non-atomic ops on ->hardirq_context,
@@ -135,7 +139,6 @@ extern void rcu_irq_exit(void);
  */
 #define __irq_enter()                                   \
         do {                                            \
-                rcu_irq_enter();                        \
                 account_system_vtime(current);          \
                 add_preempt_count(HARDIRQ_OFFSET);      \
                 trace_hardirq_enter();                  \
@@ -154,7 +157,6 @@ extern void irq_enter(void);
                 trace_hardirq_exit();                   \
                 account_system_vtime(current);          \
                 sub_preempt_count(HARDIRQ_OFFSET);      \
-                rcu_irq_exit();                         \
         } while (0)
 
 /*
@@ -166,11 +168,14 @@ extern void irq_exit(void);
         do {                                    \
                 ftrace_nmi_enter();             \
                 lockdep_off();                  \
+                rcu_nmi_enter();                \
                 __irq_enter();                  \
         } while (0)
+
 #define nmi_exit()                              \
         do {                                    \
                 __irq_exit();                   \
+                rcu_nmi_exit();                 \
                 lockdep_on();                   \
                 ftrace_nmi_exit();              \
         } while (0)