Merge branch 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

Pull x86 UV debug changes from Ingo Molnar:
 "Various SGI UV debuggability improvements, amongst them KDB support,
  with related core KDB enabling patches changing kernel/debug/kdb/"

* 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  Revert "x86/UV: Add uvtrace support"
  x86/UV: Add call to KGDB/KDB from NMI handler
  kdb: Add support for external NMI handler to call KGDB/KDB
  x86/UV: Check for alloc_cpumask_var() failures properly in uv_nmi_setup()
  x86/UV: Add uvtrace support
  x86/UV: Add kdump to UV NMI handler
  x86/UV: Add summary of cpu activity to UV NMI handler
  x86/UV: Update UV support for external NMI signals
  x86/UV: Move NMI support

diff --combined arch/x86/kernel/apic/x2apic_uv_x.c
index a419814,0a5a4b8..ad0dc04
--- 1/arch/x86/kernel/apic/x2apic_uv_x.c
--- 2/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@@ -39,12 -39,6 +39,6 @@@
  #include <asm/x86_init.h>
  #include <asm/nmi.h>
  
- /* BMC sets a bit this MMR non-zero before sending an NMI */
- #define UVH_NMI_MMR                           UVH_SCRATCH5
- #define UVH_NMI_MMR_CLEAR                     (UVH_NMI_MMR + 8)
- #define UV_NMI_PENDING_MASK                   (1UL << 63)
- DEFINE_PER_CPU(unsigned long, cpu_last_nmi_count);
- 
  DEFINE_PER_CPU(int, x2apic_extra_bits);
  
  #define PR_DEVEL(fmt, args...)        pr_devel("%s: " fmt, __func__, args)
@@@ -58,7 -52,6 +52,6 @@@ int uv_min_hub_revision_id
  EXPORT_SYMBOL_GPL(uv_min_hub_revision_id);
  unsigned int uv_apicid_hibits;
  EXPORT_SYMBOL_GPL(uv_apicid_hibits);
- static DEFINE_SPINLOCK(uv_nmi_lock);
  
  static struct apic apic_x2apic_uv_x;
  
@@@ -113,7 -106,7 +106,7 @@@ static int __init early_get_pnodeid(voi
                break;
        case UV3_HUB_PART_NUMBER:
        case UV3_HUB_PART_NUMBER_X:
 -              uv_min_hub_revision_id += UV3_HUB_REVISION_BASE - 1;
 +              uv_min_hub_revision_id += UV3_HUB_REVISION_BASE;
                break;
        }
  
@@@ -847,68 -840,6 +840,6 @@@ void uv_cpu_init(void
                set_x2apic_extra_bits(uv_hub_info->pnode);
  }
  
- /*
-  * When NMI is received, print a stack trace.
-  */
- int uv_handle_nmi(unsigned int reason, struct pt_regs *regs)
- {
-       unsigned long real_uv_nmi;
-       int bid;
- 
-       /*
-        * Each blade has an MMR that indicates when an NMI has been sent
-        * to cpus on the blade. If an NMI is detected, atomically
-        * clear the MMR and update a per-blade NMI count used to
-        * cause each cpu on the blade to notice a new NMI.
-        */
-       bid = uv_numa_blade_id();
-       real_uv_nmi = (uv_read_local_mmr(UVH_NMI_MMR) & UV_NMI_PENDING_MASK);
- 
-       if (unlikely(real_uv_nmi)) {
-               spin_lock(&uv_blade_info[bid].nmi_lock);
-               real_uv_nmi = (uv_read_local_mmr(UVH_NMI_MMR) & UV_NMI_PENDING_MASK);
-               if (real_uv_nmi) {
-                       uv_blade_info[bid].nmi_count++;
-                       uv_write_local_mmr(UVH_NMI_MMR_CLEAR, UV_NMI_PENDING_MASK);
-               }
-               spin_unlock(&uv_blade_info[bid].nmi_lock);
-       }
- 
-       if (likely(__get_cpu_var(cpu_last_nmi_count) == uv_blade_info[bid].nmi_count))
-               return NMI_DONE;
- 
-       __get_cpu_var(cpu_last_nmi_count) = uv_blade_info[bid].nmi_count;
- 
-       /*
-        * Use a lock so only one cpu prints at a time.
-        * This prevents intermixed output.
-        */
-       spin_lock(&uv_nmi_lock);
-       pr_info("UV NMI stack dump cpu %u:\n", smp_processor_id());
-       dump_stack();
-       spin_unlock(&uv_nmi_lock);
- 
-       return NMI_HANDLED;
- }
- 
- void uv_register_nmi_notifier(void)
- {
-       if (register_nmi_handler(NMI_UNKNOWN, uv_handle_nmi, 0, "uv"))
-               printk(KERN_WARNING "UV NMI handler failed to register\n");
- }
- 
- void uv_nmi_init(void)
- {
-       unsigned int value;
- 
-       /*
-        * Unmask NMI on all cpus
-        */
-       value = apic_read(APIC_LVT1) | APIC_DM_NMI;
-       value &= ~APIC_LVT_MASKED;
-       apic_write(APIC_LVT1, value);
- }
- 
  void __init uv_system_init(void)
  {
        union uvh_rh_gam_config_mmr_u  m_n_config;
@@@ -1046,6 -977,7 +977,7 @@@
        map_mmr_high(max_pnode);
        map_mmioh_high(min_pnode, max_pnode);
  
+       uv_nmi_setup();
        uv_cpu_init();
        uv_scir_register_cpu_notifier();
        uv_register_nmi_notifier();