35 files changed, 204 insertions, 94 deletions

diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 21aa4fc5f8ef..8c39913d1729 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -327,17 +327,7 @@ config FORCE_CPEI_RETARGET
         This option it useful to enable this feature on older BIOS's as well.
         You can also enable this by using boot command line option force_cpei=1.
 
-config PREEMPT
-        bool "Preemptible Kernel"
-        help
-          This option reduces the latency of the kernel when reacting to
-          real-time or interactive events by allowing a low priority process to
-          be preempted even if it is in kernel mode executing a system call.
-          This allows applications to run more reliably even when the system is
-          under load.
-
-          Say Y here if you are building a kernel for a desktop, embedded
-          or real-time system.  Say N if you are unsure.
+source "kernel/Kconfig.preempt"
 
 source "mm/Kconfig"
 
diff --git a/arch/ia64/configs/bigsur_defconfig b/arch/ia64/configs/bigsur_defconfig
index 9eb48c0927b0..6dd8655664f3 100644
--- a/arch/ia64/configs/bigsur_defconfig
+++ b/arch/ia64/configs/bigsur_defconfig
@@ -42,7 +42,7 @@ CONFIG_CC_ALIGN_FUNCTIONS=0
 CONFIG_CC_ALIGN_LABELS=0
 CONFIG_CC_ALIGN_LOOPS=0
 CONFIG_CC_ALIGN_JUMPS=0
-CONFIG_SLAB=y
+CONFIG_SLUB=y
 # CONFIG_TINY_SHMEM is not set
 CONFIG_BASE_SMALL=0
 # CONFIG_SLOB is not set
diff --git a/arch/ia64/configs/gensparse_defconfig b/arch/ia64/configs/gensparse_defconfig
index 3a9ed951db08..e86fbd39c795 100644
--- a/arch/ia64/configs/gensparse_defconfig
+++ b/arch/ia64/configs/gensparse_defconfig
@@ -43,7 +43,7 @@ CONFIG_CC_ALIGN_FUNCTIONS=0
 CONFIG_CC_ALIGN_LABELS=0
 CONFIG_CC_ALIGN_LOOPS=0
 CONFIG_CC_ALIGN_JUMPS=0
-CONFIG_SLAB=y
+CONFIG_SLUB=y
 # CONFIG_TINY_SHMEM is not set
 CONFIG_BASE_SMALL=0
 # CONFIG_SLOB is not set
diff --git a/arch/ia64/configs/sim_defconfig b/arch/ia64/configs/sim_defconfig
index c420d9f3df98..546a772f438e 100644
--- a/arch/ia64/configs/sim_defconfig
+++ b/arch/ia64/configs/sim_defconfig
@@ -43,7 +43,7 @@ CONFIG_CC_ALIGN_FUNCTIONS=0
 CONFIG_CC_ALIGN_LABELS=0
 CONFIG_CC_ALIGN_LOOPS=0
 CONFIG_CC_ALIGN_JUMPS=0
-CONFIG_SLAB=y
+CONFIG_SLUB=y
 # CONFIG_TINY_SHMEM is not set
 CONFIG_BASE_SMALL=0
 # CONFIG_SLOB is not set
diff --git a/arch/ia64/configs/sn2_defconfig b/arch/ia64/configs/sn2_defconfig
index 4c9ffc47bc7a..9aecfceeb38c 100644
--- a/arch/ia64/configs/sn2_defconfig
+++ b/arch/ia64/configs/sn2_defconfig
@@ -46,7 +46,7 @@ CONFIG_BASE_FULL=y
 CONFIG_FUTEX=y
 CONFIG_EPOLL=y
 CONFIG_SHMEM=y
-CONFIG_SLAB=y
+CONFIG_SLUB=y
 CONFIG_VM_EVENT_COUNTERS=y
 CONFIG_RT_MUTEXES=y
 # CONFIG_TINY_SHMEM is not set
diff --git a/arch/ia64/configs/tiger_defconfig b/arch/ia64/configs/tiger_defconfig
index 3dbb3987df27..797acf9066c1 100644
--- a/arch/ia64/configs/tiger_defconfig
+++ b/arch/ia64/configs/tiger_defconfig
@@ -53,7 +53,7 @@ CONFIG_TIMERFD=y
 CONFIG_EVENTFD=y
 CONFIG_SHMEM=y
 CONFIG_VM_EVENT_COUNTERS=y
-CONFIG_SLAB=y
+CONFIG_SLUB=y
 # CONFIG_SLUB is not set
 # CONFIG_SLOB is not set
 CONFIG_RT_MUTEXES=y
diff --git a/arch/ia64/configs/zx1_defconfig b/arch/ia64/configs/zx1_defconfig
index 4a060fc39934..0a06b1333c95 100644
--- a/arch/ia64/configs/zx1_defconfig
+++ b/arch/ia64/configs/zx1_defconfig
@@ -48,7 +48,7 @@ CONFIG_BASE_FULL=y
 CONFIG_FUTEX=y
 CONFIG_EPOLL=y
 CONFIG_SHMEM=y
-CONFIG_SLAB=y
+CONFIG_SLUB=y
 CONFIG_VM_EVENT_COUNTERS=y
 CONFIG_RT_MUTEXES=y
 # CONFIG_TINY_SHMEM is not set
diff --git a/arch/ia64/defconfig b/arch/ia64/defconfig
index 03172dc8c403..0210545e7f61 100644
--- a/arch/ia64/defconfig
+++ b/arch/ia64/defconfig
@@ -53,8 +53,7 @@ CONFIG_TIMERFD=y
 CONFIG_EVENTFD=y
 CONFIG_SHMEM=y
 CONFIG_VM_EVENT_COUNTERS=y
-CONFIG_SLAB=y
-# CONFIG_SLUB is not set
+CONFIG_SLUB=y
 # CONFIG_SLOB is not set
 CONFIG_RT_MUTEXES=y
 # CONFIG_TINY_SHMEM is not set
diff --git a/arch/ia64/hp/sim/boot/boot_head.S b/arch/ia64/hp/sim/boot/boot_head.S
index a9bd71ac78e2..8808565491fb 100644
--- a/arch/ia64/hp/sim/boot/boot_head.S
+++ b/arch/ia64/hp/sim/boot/boot_head.S
@@ -26,6 +26,7 @@ GLOBAL_ENTRY(_start)
         movl sp = stack_mem+16384-16
         bsw.1
         br.call.sptk.many rp=start_bootloader
+0:      nop 0             /* dummy nop to make unwinding work */
 END(_start)
 
 /*
diff --git a/arch/ia64/hp/sim/hpsim_console.c b/arch/ia64/hp/sim/hpsim_console.c
index 6e149c8ab835..01663bc42b1a 100644
--- a/arch/ia64/hp/sim/hpsim_console.c
+++ b/arch/ia64/hp/sim/hpsim_console.c
@@ -21,6 +21,7 @@
 #include <asm/machvec.h>
 #include <asm/pgtable.h>
 #include <asm/sal.h>
+#include <asm/hpsim.h>
 
 #include "hpsim_ssc.h"
 
@@ -28,7 +29,7 @@ static int simcons_init (struct console *, char *);
 static void simcons_write (struct console *, const char *, unsigned);
 static struct tty_driver *simcons_console_device (struct console *, int *);
 
-struct console hpsim_cons = {
+static struct console hpsim_cons = {
         .name =         "simcons",
         .write =        simcons_write,
         .device =       simcons_console_device,
@@ -58,7 +59,18 @@ simcons_write (struct console *cons, const char *buf, unsigned count)
 
 static struct tty_driver *simcons_console_device (struct console *c, int *index)
 {
-        extern struct tty_driver *hp_simserial_driver;
         *index = c->index;
         return hp_simserial_driver;
 }
+
+int simcons_register(void)
+{
+        if (!ia64_platform_is("hpsim"))
+                return 1;
+
+        if (hpsim_cons.flags & CON_ENABLED)
+                return 1;
+
+        register_console(&hpsim_cons);
+        return 0;
+}
diff --git a/arch/ia64/hp/sim/hpsim_setup.c b/arch/ia64/hp/sim/hpsim_setup.c
index f2297192a582..f629e903ebc7 100644
--- a/arch/ia64/hp/sim/hpsim_setup.c
+++ b/arch/ia64/hp/sim/hpsim_setup.c
@@ -21,6 +21,7 @@
 #include <asm/machvec.h>
 #include <asm/pgtable.h>
 #include <asm/sal.h>
+#include <asm/hpsim.h>
 
 #include "hpsim_ssc.h"
 
@@ -41,11 +42,5 @@ hpsim_setup (char **cmdline_p)
 {
         ROOT_DEV = Root_SDA1;           /* default to first SCSI drive */
 
-#ifdef CONFIG_HP_SIMSERIAL_CONSOLE
-        {
-                extern struct console hpsim_cons;
-                if (ia64_platform_is("hpsim"))
-                        register_console(&hpsim_cons);
-        }
-#endif
+        simcons_register();
 }
diff --git a/arch/ia64/hp/sim/simeth.c b/arch/ia64/hp/sim/simeth.c
index f26077a773d5..08b117e2c54b 100644
--- a/arch/ia64/hp/sim/simeth.c
+++ b/arch/ia64/hp/sim/simeth.c
@@ -22,6 +22,9 @@
 #include <linux/bitops.h>
 #include <asm/system.h>
 #include <asm/irq.h>
+#include <asm/hpsim.h>
+
+#include "hpsim_ssc.h"
 
 #define SIMETH_RECV_MAX 10
 
@@ -35,12 +38,6 @@
 #define SIMETH_FRAME_SIZE       ETH_FRAME_LEN
 
 
-#define SSC_NETDEV_PROBE                100
-#define SSC_NETDEV_SEND                 101
-#define SSC_NETDEV_RECV                 102
-#define SSC_NETDEV_ATTACH               103
-#define SSC_NETDEV_DETACH               104
-
 #define NETWORK_INTR                    8
 
 struct simeth_local {
@@ -124,9 +121,6 @@ simeth_probe (void)
         return r;
 }
 
-extern long ia64_ssc (long, long, long, long, int);
-extern void ia64_ssc_connect_irq (long intr, long irq);
-
 static inline int
 netdev_probe(char *name, unsigned char *ether)
 {
@@ -300,6 +294,9 @@ simeth_device_event(struct notifier_block *this,unsigned long event, void *ptr)
                 return NOTIFY_DONE;
         }
 
+        if (dev->nd_net != &init_net)
+                return NOTIFY_DONE;
+
         if ( event != NETDEV_UP && event != NETDEV_DOWN ) return NOTIFY_DONE;
 
         /*
diff --git a/arch/ia64/hp/sim/simscsi.c b/arch/ia64/hp/sim/simscsi.c
index a43e1e1822ad..d62fa76e5a7d 100644
--- a/arch/ia64/hp/sim/simscsi.c
+++ b/arch/ia64/hp/sim/simscsi.c
@@ -14,6 +14,7 @@
 #include <linux/kernel.h>
 #include <linux/timer.h>
 #include <asm/irq.h>
+#include "hpsim_ssc.h"
 
 #include <scsi/scsi.h>
 #include <scsi/scsi_cmnd.h>
@@ -59,8 +60,6 @@ struct disk_stat {
         unsigned count;
 };
 
-extern long ia64_ssc (long arg0, long arg1, long arg2, long arg3, int nr);
-
 static int desc[16] = {
         -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
 };
diff --git a/arch/ia64/ia32/audit.c b/arch/ia64/ia32/audit.c
index 8850fe40ea34..5e901c75df1b 100644
--- a/arch/ia64/ia32/audit.c
+++ b/arch/ia64/ia32/audit.c
@@ -1,4 +1,4 @@
-#include <asm-i386/unistd.h>
+#include <asm-x86/unistd_32.h>
 
 unsigned ia32_dir_class[] = {
 #include <asm-generic/audit_dir_write.h>
diff --git a/arch/ia64/kernel/cpufreq/acpi-cpufreq.c b/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
index 15c08d52f09f..b8498ea62068 100644
--- a/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
+++ b/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
@@ -113,10 +113,8 @@ processor_get_freq (
 
         saved_mask = current->cpus_allowed;
         set_cpus_allowed(current, cpumask_of_cpu(cpu));
-        if (smp_processor_id() != cpu) {
-                ret = -EAGAIN;
+        if (smp_processor_id() != cpu)
                 goto migrate_end;
-        }
 
         /* processor_get_pstate gets the instantaneous frequency */
         ret = processor_get_pstate(&value);
@@ -125,7 +123,7 @@ processor_get_freq (
                 set_cpus_allowed(current, saved_mask);
                 printk(KERN_WARNING "get performance failed with error %d\n",
                        ret);
-                ret = -EAGAIN;
+                ret = 0;
                 goto migrate_end;
         }
         clock_freq = extract_clock(data, value, cpu);
@@ -323,8 +321,6 @@ acpi_cpufreq_cpu_init (
                             data->acpi_data.states[i].transition_latency * 1000;
                 }
         }
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
-
         policy->cur = processor_get_freq(data, policy->cpu);
 
         /* table init */
diff --git a/arch/ia64/kernel/irq.c b/arch/ia64/kernel/irq.c
index cc3ee4ef37af..44be1c952b7c 100644
--- a/arch/ia64/kernel/irq.c
+++ b/arch/ia64/kernel/irq.c
@@ -33,6 +33,11 @@ void ack_bad_irq(unsigned int irq)
 }
 
 #ifdef CONFIG_IA64_GENERIC
+ia64_vector __ia64_irq_to_vector(int irq)
+{
+        return irq_cfg[irq].vector;
+}
+
 unsigned int __ia64_local_vector_to_irq (ia64_vector vec)
 {
         return __get_cpu_var(vector_irq)[vec];
diff --git a/arch/ia64/kernel/irq_ia64.c b/arch/ia64/kernel/irq_ia64.c
index c47c8acc96e3..00a4599e5f47 100644
--- a/arch/ia64/kernel/irq_ia64.c
+++ b/arch/ia64/kernel/irq_ia64.c
@@ -82,7 +82,7 @@ struct irq_cfg irq_cfg[NR_IRQS] __read_mostly = {
 };
 
 DEFINE_PER_CPU(int[IA64_NUM_VECTORS], vector_irq) = {
-        [0 ... IA64_NUM_VECTORS - 1] = IA64_SPURIOUS_INT_VECTOR
+        [0 ... IA64_NUM_VECTORS - 1] = -1
 };
 
 static cpumask_t vector_table[IA64_NUM_VECTORS] = {
@@ -179,7 +179,7 @@ static void __clear_irq_vector(int irq)
         domain = cfg->domain;
         cpus_and(mask, cfg->domain, cpu_online_map);
         for_each_cpu_mask(cpu, mask)
-                per_cpu(vector_irq, cpu)[vector] = IA64_SPURIOUS_INT_VECTOR;
+                per_cpu(vector_irq, cpu)[vector] = -1;
         cfg->vector = IRQ_VECTOR_UNASSIGNED;
         cfg->domain = CPU_MASK_NONE;
         irq_status[irq] = IRQ_UNUSED;
@@ -249,7 +249,7 @@ void __setup_vector_irq(int cpu)
 
         /* Clear vector_irq */
         for (vector = 0; vector < IA64_NUM_VECTORS; ++vector)
-                per_cpu(vector_irq, cpu)[vector] = IA64_SPURIOUS_INT_VECTOR;
+                per_cpu(vector_irq, cpu)[vector] = -1;
         /* Mark the inuse vectors */
         for (irq = 0; irq < NR_IRQS; ++irq) {
                 if (!cpu_isset(cpu, irq_cfg[irq].domain))
@@ -432,10 +432,18 @@ ia64_handle_irq (ia64_vector vector, struct pt_regs *regs)
                 } else if (unlikely(IS_RESCHEDULE(vector)))
                         kstat_this_cpu.irqs[vector]++;
                 else {
+                        int irq = local_vector_to_irq(vector);
+
                         ia64_setreg(_IA64_REG_CR_TPR, vector);
                         ia64_srlz_d();
 
-                        generic_handle_irq(local_vector_to_irq(vector));
+                        if (unlikely(irq < 0)) {
+                                printk(KERN_ERR "%s: Unexpected interrupt "
+                                       "vector %d on CPU %d is not mapped "
+                                       "to any IRQ!\n", __FUNCTION__, vector,
+                                       smp_processor_id());
+                        } else
+                                generic_handle_irq(irq);
 
                         /*
                          * Disable interrupts and send EOI:
@@ -483,6 +491,7 @@ void ia64_process_pending_intr(void)
                         kstat_this_cpu.irqs[vector]++;
                 else {
                         struct pt_regs *old_regs = set_irq_regs(NULL);
+                        int irq = local_vector_to_irq(vector);
 
                         ia64_setreg(_IA64_REG_CR_TPR, vector);
                         ia64_srlz_d();
@@ -493,8 +502,15 @@ void ia64_process_pending_intr(void)
                          * it will work. I hope it works!.
                          * Probably could shared code.
                          */
-                        vectors_in_migration[local_vector_to_irq(vector)]=0;
-                        generic_handle_irq(local_vector_to_irq(vector));
+                        if (unlikely(irq < 0)) {
+                                printk(KERN_ERR "%s: Unexpected interrupt "
+                                       "vector %d on CPU %d not being mapped "
+                                       "to any IRQ!!\n", __FUNCTION__, vector,
+                                       smp_processor_id());
+                        } else {
+                                vectors_in_migration[irq]=0;
+                                generic_handle_irq(irq);
+                        }
                         set_irq_regs(old_regs);
 
                         /*
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index ff28620cb992..63b73f3d4c9f 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -2018,22 +2018,26 @@ ia64_mca_late_init(void)
 
                 if (cpe_vector >= 0) {
                         /* If platform supports CPEI, enable the irq. */
-                        cpe_poll_enabled = 0;
-                        for (irq = 0; irq < NR_IRQS; ++irq)
-                                if (irq_to_vector(irq) == cpe_vector) {
-                                        desc = irq_desc + irq;
-                                        desc->status |= IRQ_PER_CPU;
-                                        setup_irq(irq, &mca_cpe_irqaction);
-                                        ia64_cpe_irq = irq;
-                                }
-                        ia64_mca_register_cpev(cpe_vector);
-                        IA64_MCA_DEBUG("%s: CPEI/P setup and enabled.\n", __FUNCTION__);
-                } else {
-                        /* If platform doesn't support CPEI, get the timer going. */
-                        if (cpe_poll_enabled) {
-                                ia64_mca_cpe_poll(0UL);
-                                IA64_MCA_DEBUG("%s: CPEP setup and enabled.\n", __FUNCTION__);
+                        irq = local_vector_to_irq(cpe_vector);
+                        if (irq > 0) {
+                                cpe_poll_enabled = 0;
+                                desc = irq_desc + irq;
+                                desc->status |= IRQ_PER_CPU;
+                                setup_irq(irq, &mca_cpe_irqaction);
+                                ia64_cpe_irq = irq;
+                                ia64_mca_register_cpev(cpe_vector);
+                                IA64_MCA_DEBUG("%s: CPEI/P setup and enabled.\n",
+                                        __FUNCTION__);
+                                return 0;
                         }
+                        printk(KERN_ERR "%s: Failed to find irq for CPE "
+                                        "interrupt handler, vector %d\n",
+                                        __FUNCTION__, cpe_vector);
+                }
+                /* If platform doesn't support CPEI, get the timer going. */
+                if (cpe_poll_enabled) {
+                        ia64_mca_cpe_poll(0UL);
+                        IA64_MCA_DEBUG("%s: CPEP setup and enabled.\n", __FUNCTION__);
                 }
         }
 #endif
diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index 4158906c45aa..c613fc0e91cc 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -198,9 +198,13 @@ default_idle (void)
 {
         local_irq_enable();
         while (!need_resched()) {
-                if (can_do_pal_halt)
-                        safe_halt();
-                else
+                if (can_do_pal_halt) {
+                        local_irq_disable();
+                        if (!need_resched()) {
+                                safe_halt();
+                        }
+                        local_irq_enable();
+                } else
                         cpu_relax();
         }
 }
diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c
index 00f803246948..2e96f17b2f3b 100644
--- a/arch/ia64/kernel/ptrace.c
+++ b/arch/ia64/kernel/ptrace.c
@@ -951,10 +951,14 @@ access_uarea (struct task_struct *child, unsigned long addr,
                         return 0;
 
                       case PT_CR_IPSR:
-                        if (write_access)
-                                pt->cr_ipsr = ((*data & IPSR_MASK)
+                        if (write_access) {
+                                unsigned long tmp = *data;
+                                /* psr.ri==3 is a reserved value: SDM 2:25 */
+                                if ((tmp & IA64_PSR_RI) == IA64_PSR_RI)
+                                        tmp &= ~IA64_PSR_RI;
+                                pt->cr_ipsr = ((tmp & IPSR_MASK)
                                                | (pt->cr_ipsr & ~IPSR_MASK));
-                        else
+                        } else
                                 *data = (pt->cr_ipsr & IPSR_MASK);
                         return 0;
 
@@ -1573,7 +1577,6 @@ sys_ptrace (long request, pid_t pid, unsigned long addr, unsigned long data)
 
               case PTRACE_DETACH:
                 /* detach a process that was attached. */
-                clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
                 ret = ptrace_detach(child, data);
                 goto out_tsk;
 
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index cd9a37a552c3..9e392a30d197 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -60,6 +60,7 @@
 #include <asm/smp.h>
 #include <asm/system.h>
 #include <asm/unistd.h>
+#include <asm/hpsim.h>
 
 #if defined(CONFIG_SMP) && (IA64_CPU_SIZE > PAGE_SIZE)
 # error "struct cpuinfo_ia64 too big!"
@@ -389,6 +390,8 @@ early_console_setup (char *cmdline)
         if (!efi_setup_pcdp_console(cmdline))
                 earlycons++;
 #endif
+        if (!simcons_register())
+                earlycons++;
 
         return (earlycons) ? 0 : -1;
 }
@@ -953,6 +956,11 @@ cpu_init (void)
 
         /* clear TPR & XTP to enable all interrupt classes: */
         ia64_setreg(_IA64_REG_CR_TPR, 0);
+
+        /* Clear any pending interrupts left by SAL/EFI */
+        while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR)
+                ia64_eoi();
+
 #ifdef CONFIG_SMP
         normal_xtp();
 #endif
diff --git a/arch/ia64/kernel/smpboot.c b/arch/ia64/kernel/smpboot.c
index 62209dcf06d3..308772f7cddc 100644
--- a/arch/ia64/kernel/smpboot.c
+++ b/arch/ia64/kernel/smpboot.c
@@ -58,6 +58,7 @@
 #include <asm/system.h>
 #include <asm/tlbflush.h>
 #include <asm/unistd.h>
+#include <asm/sn/arch.h>
 
 #define SMP_DEBUG 0
 
@@ -730,6 +731,11 @@ int __cpu_disable(void)
                 return (-EBUSY);
         }
 
+        if (ia64_platform_is("sn2")) {
+                if (!sn_cpu_disable_allowed(cpu))
+                        return -EBUSY;
+        }
+
         cpu_clear(cpu, cpu_online_map);
 
         if (migrate_platform_irqs(cpu)) {
diff --git a/arch/ia64/kernel/vmlinux.lds.S b/arch/ia64/kernel/vmlinux.lds.S
index 83e80677de70..00232b4357ba 100644
--- a/arch/ia64/kernel/vmlinux.lds.S
+++ b/arch/ia64/kernel/vmlinux.lds.S
@@ -20,6 +20,8 @@ PHDRS {
   code   PT_LOAD;
   percpu PT_LOAD;
   data   PT_LOAD;
+  note   PT_NOTE;
+  unwind 0x70000001; /* PT_IA_64_UNWIND, but ld doesn't match the name */
 }
 SECTIONS
 {
@@ -62,6 +64,9 @@ SECTIONS
 
   /* Read-only data */
 
+  NOTES :code :note             /* put .notes in text and mark in PT_NOTE  */
+  code_continues : {} :code     /* switch back to regular program...  */
+
   /* Exception table */
   . = ALIGN(16);
   __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET)
@@ -99,7 +104,8 @@ SECTIONS
           __start_unwind = .;
           *(.IA_64.unwind*)
           __end_unwind = .;
-        }
+        } :code :unwind
+  code_continues2 : {} : code
 
   RODATA
 
@@ -276,10 +282,6 @@ SECTIONS
   .debug_typenames 0 : { *(.debug_typenames) }
   .debug_varnames  0 : { *(.debug_varnames) }
   /* These must appear regardless of  .  */
-  /* Discard them for now since Intel SoftSDV cannot handle them.
-  .comment 0 : { *(.comment) }
-  .note 0 : { *(.note) }
-  */
   /DISCARD/ : { *(.comment) }
   /DISCARD/ : { *(.note) }
 }
diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c
index 7ac8592a35b6..d3c538be466c 100644
--- a/arch/ia64/mm/contig.c
+++ b/arch/ia64/mm/contig.c
@@ -17,6 +17,7 @@
 #include <linux/bootmem.h>
 #include <linux/efi.h>
 #include <linux/mm.h>
+#include <linux/nmi.h>
 #include <linux/swap.h>
 
 #include <asm/meminit.h>
@@ -56,6 +57,8 @@ void show_mem(void)
                 present = pgdat->node_present_pages;
                 for(i = 0; i < pgdat->node_spanned_pages; i++) {
                         struct page *page;
+                        if (unlikely(i % MAX_ORDER_NR_PAGES == 0))
+                                touch_nmi_watchdog();
                         if (pfn_valid(pgdat->node_start_pfn + i))
                                 page = pfn_to_page(pgdat->node_start_pfn + i);
                         else {
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index 0dbf0e81f8c0..0d34585058c8 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -16,6 +16,7 @@
 
 #include <linux/kernel.h>
 #include <linux/mm.h>
+#include <linux/nmi.h>
 #include <linux/swap.h>
 #include <linux/bootmem.h>
 #include <linux/acpi.h>
@@ -533,6 +534,8 @@ void show_mem(void)
                 present = pgdat->node_present_pages;
                 for(i = 0; i < pgdat->node_spanned_pages; i++) {
                         struct page *page;
+                        if (unlikely(i % MAX_ORDER_NR_PAGES == 0))
+                                touch_nmi_watchdog();
                         if (pfn_valid(pgdat->node_start_pfn + i))
                                 page = pfn_to_page(pgdat->node_start_pfn + i);
                         else {
diff --git a/arch/ia64/mm/fault.c b/arch/ia64/mm/fault.c
index 73ccb6010c05..9150ffaff9e8 100644
--- a/arch/ia64/mm/fault.c
+++ b/arch/ia64/mm/fault.c
@@ -112,11 +112,17 @@ ia64_do_page_fault (unsigned long address, unsigned long isr, struct pt_regs *re
         down_read(&mm->mmap_sem);
 
         vma = find_vma_prev(mm, address, &prev_vma);
-        if (!vma)
+        if (!vma && !prev_vma )
                 goto bad_area;
 
-        /* find_vma_prev() returns vma such that address < vma->vm_end or NULL */
-        if (address < vma->vm_start)
+        /*
+         * find_vma_prev() returns vma such that address < vma->vm_end or NULL
+         *
+         * May find no vma, but could be that the last vm area is the
+         * register backing store that needs to expand upwards, in
+         * this case vma will be null, but prev_vma will ne non-null
+         */
+        if (( !vma && prev_vma ) || (address < vma->vm_start) )
                 goto check_expansion;
 
   good_area:
@@ -172,6 +178,8 @@ ia64_do_page_fault (unsigned long address, unsigned long isr, struct pt_regs *re
 
   check_expansion:
         if (!(prev_vma && (prev_vma->vm_flags & VM_GROWSUP) && (address == prev_vma->vm_end))) {
+                if (!vma)
+                        goto bad_area;
                 if (!(vma->vm_flags & VM_GROWSDOWN))
                         goto bad_area;
                 if (REGION_NUMBER(address) != REGION_NUMBER(vma->vm_start)
diff --git a/arch/ia64/mm/hugetlbpage.c b/arch/ia64/mm/hugetlbpage.c
index d22861c5b04c..a9ff685aea25 100644
--- a/arch/ia64/mm/hugetlbpage.c
+++ b/arch/ia64/mm/hugetlbpage.c
@@ -75,10 +75,8 @@ int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
  * Don't actually need to do any preparation, but need to make sure
  * the address is in the right region.
  */
-int prepare_hugepage_range(unsigned long addr, unsigned long len, pgoff_t pgoff)
+int prepare_hugepage_range(unsigned long addr, unsigned long len)
 {
-        if (pgoff & (~HPAGE_MASK >> PAGE_SHIFT))
-                return -EINVAL;
         if (len & ~HPAGE_MASK)
                 return -EINVAL;
         if (addr & ~HPAGE_MASK)
@@ -151,7 +149,7 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, u
 
         /* Handle MAP_FIXED */
         if (flags & MAP_FIXED) {
-                if (prepare_hugepage_range(addr, len, pgoff))
+                if (prepare_hugepage_range(addr, len))
                         return -EINVAL;
                 return addr;
         }
diff --git a/arch/ia64/sn/kernel/huberror.c b/arch/ia64/sn/kernel/huberror.c
index 2c3f9dfca78b..b663168da55c 100644
--- a/arch/ia64/sn/kernel/huberror.c
+++ b/arch/ia64/sn/kernel/huberror.c
@@ -185,11 +185,14 @@ void hubiio_crb_error_handler(struct hubdev_info *hubdev_info)
  */
 void hub_error_init(struct hubdev_info *hubdev_info)
 {
+
         if (request_irq(SGI_II_ERROR, hub_eint_handler, IRQF_SHARED,
-                        "SN_hub_error", (void *)hubdev_info))
+                        "SN_hub_error", (void *)hubdev_info)) {
                 printk("hub_error_init: Failed to request_irq for 0x%p\n",
                     hubdev_info);
-        return;
+                return;
+        }
+        sn_set_err_irq_affinity(SGI_II_ERROR);
 }
 
 
@@ -202,11 +205,14 @@ void hub_error_init(struct hubdev_info *hubdev_info)
  */
 void ice_error_init(struct hubdev_info *hubdev_info)
 {
+
         if (request_irq
             (SGI_TIO_ERROR, (void *)hub_eint_handler, IRQF_SHARED, "SN_TIO_error",
-             (void *)hubdev_info))
+             (void *)hubdev_info)) {
                 printk("ice_error_init: request_irq() error hubdev_info 0x%p\n",
                        hubdev_info);
-        return;
+                return;
+        }
+        sn_set_err_irq_affinity(SGI_TIO_ERROR);
 }
 
diff --git a/arch/ia64/sn/kernel/irq.c b/arch/ia64/sn/kernel/irq.c
index 7f6d2360a262..0f9b12683bf3 100644
--- a/arch/ia64/sn/kernel/irq.c
+++ b/arch/ia64/sn/kernel/irq.c
@@ -19,6 +19,7 @@
 #include <asm/sn/pcidev.h>
 #include <asm/sn/shub_mmr.h>
 #include <asm/sn/sn_sal.h>
+#include <asm/sn/sn_feature_sets.h>
 
 static void force_interrupt(int irq);
 static void register_intr_pda(struct sn_irq_info *sn_irq_info);
@@ -233,6 +234,20 @@ static void sn_set_affinity_irq(unsigned int irq, cpumask_t mask)
                 (void)sn_retarget_vector(sn_irq_info, nasid, slice);
 }
 
+#ifdef CONFIG_SMP
+void sn_set_err_irq_affinity(unsigned int irq)
+{
+        /*
+         * On systems which support CPU disabling (SHub2), all error interrupts
+         * are targetted at the boot CPU.
+         */
+        if (is_shub2() && sn_prom_feature_available(PRF_CPU_DISABLE_SUPPORT))
+                set_irq_affinity_info(irq, cpu_physical_id(0), 0);
+}
+#else
+void sn_set_err_irq_affinity(unsigned int irq) { }
+#endif
+
 static void
 sn_mask_irq(unsigned int irq)
 {
@@ -256,6 +271,13 @@ struct irq_chip irq_type_sn = {
         .set_affinity   = sn_set_affinity_irq
 };
 
+ia64_vector sn_irq_to_vector(int irq)
+{
+        if (irq >= IA64_NUM_VECTORS)
+                return 0;
+        return (ia64_vector)irq;
+}
+
 unsigned int sn_local_vector_to_irq(u8 vector)
 {
         return (CPU_VECTOR_TO_IRQ(smp_processor_id(), vector));
@@ -398,7 +420,10 @@ sn_call_force_intr_provider(struct sn_irq_info *sn_irq_info)
         struct sn_pcibus_provider *pci_provider;
 
         pci_provider = sn_pci_provider[sn_irq_info->irq_bridge_type];
-        if (pci_provider && pci_provider->force_interrupt)
+
+        /* Don't force an interrupt if the irq has been disabled */
+        if (!(irq_desc[sn_irq_info->irq_irq].status & IRQ_DISABLED) &&
+            pci_provider && pci_provider->force_interrupt)
                 (*pci_provider->force_interrupt)(sn_irq_info);
 }
 
diff --git a/arch/ia64/sn/kernel/sn2/sn2_smp.c b/arch/ia64/sn/kernel/sn2/sn2_smp.c
index 033c8a9f000e..f3c69329e145 100644
--- a/arch/ia64/sn/kernel/sn2/sn2_smp.c
+++ b/arch/ia64/sn/kernel/sn2/sn2_smp.c
@@ -40,6 +40,7 @@
 #include <asm/sn/shub_mmr.h>
 #include <asm/sn/nodepda.h>
 #include <asm/sn/rw_mmr.h>
+#include <asm/sn/sn_feature_sets.h>
 
 DEFINE_PER_CPU(struct ptc_stats, ptcstats);
 DECLARE_PER_CPU(struct ptc_stats, ptcstats);
@@ -429,6 +430,31 @@ void sn2_send_IPI(int cpuid, int vector, int delivery_mode, int redirect)
         sn_send_IPI_phys(nasid, physid, vector, delivery_mode);
 }
 
+#ifdef CONFIG_HOTPLUG_CPU
+/**
+ * sn_cpu_disable_allowed - Determine if a CPU can be disabled.
+ * @cpu - CPU that is requested to be disabled.
+ *
+ * CPU disable is only allowed on SHub2 systems running with a PROM
+ * that supports CPU disable. It is not permitted to disable the boot processor.
+ */
+bool sn_cpu_disable_allowed(int cpu)
+{
+        if (is_shub2() && sn_prom_feature_available(PRF_CPU_DISABLE_SUPPORT)) {
+                if (cpu != 0)
+                        return true;
+                else
+                        printk(KERN_WARNING
+                              "Disabling the boot processor is not allowed.\n");
+
+        } else
+                printk(KERN_WARNING
+                       "CPU disable is not supported on this system.\n");
+
+        return false;
+}
+#endif /* CONFIG_HOTPLUG_CPU */
+
 #ifdef CONFIG_PROC_FS
 
 #define PTC_BASENAME    "sgi_sn/ptc_statistics"
diff --git a/arch/ia64/sn/kernel/sn2/sn_hwperf.c b/arch/ia64/sn/kernel/sn2/sn_hwperf.c
index df8d5bed6119..1a8e49607f11 100644
--- a/arch/ia64/sn/kernel/sn2/sn_hwperf.c
+++ b/arch/ia64/sn/kernel/sn2/sn_hwperf.c
@@ -66,7 +66,8 @@ static int sn_hwperf_enum_objects(int *nobj, struct sn_hwperf_object_info **ret)
         }
 
         sz = sn_hwperf_obj_cnt * sizeof(struct sn_hwperf_object_info);
-        if ((objbuf = (struct sn_hwperf_object_info *) vmalloc(sz)) == NULL) {
+        objbuf = vmalloc(sz);
+        if (objbuf == NULL) {
                 printk("sn_hwperf_enum_objects: vmalloc(%d) failed\n", (int)sz);
                 e = -ENOMEM;
                 goto out;
diff --git a/arch/ia64/sn/kernel/tiocx.c b/arch/ia64/sn/kernel/tiocx.c
index 5a289e4de838..a88eba3314d7 100644
--- a/arch/ia64/sn/kernel/tiocx.c
+++ b/arch/ia64/sn/kernel/tiocx.c
@@ -66,8 +66,7 @@ static int tiocx_match(struct device *dev, struct device_driver *drv)
 
 }
 
-static int tiocx_uevent(struct device *dev, char **envp, int num_envp,
-                         char *buffer, int buffer_size)
+static int tiocx_uevent(struct device *dev, struct kobj_uevent_env *env)
 {
         return -ENODEV;
 }
diff --git a/arch/ia64/sn/pci/pcibr/pcibr_provider.c b/arch/ia64/sn/pci/pcibr/pcibr_provider.c
index 42485ad50ceb..ab3eaf85fe4d 100644
--- a/arch/ia64/sn/pci/pcibr/pcibr_provider.c
+++ b/arch/ia64/sn/pci/pcibr/pcibr_provider.c
@@ -145,6 +145,7 @@ pcibr_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *cont
                 printk(KERN_WARNING
                        "pcibr cannot allocate interrupt for error handler\n");
         }
+        sn_set_err_irq_affinity(SGI_PCIASIC_ERROR);
 
         /* 
          * Update the Bridge with the "kernel" pagesize 
diff --git a/arch/ia64/sn/pci/tioca_provider.c b/arch/ia64/sn/pci/tioca_provider.c
index d798dd4d0dc4..ef048a674772 100644
--- a/arch/ia64/sn/pci/tioca_provider.c
+++ b/arch/ia64/sn/pci/tioca_provider.c
@@ -654,6 +654,8 @@ tioca_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *cont
                        __FUNCTION__, SGI_TIOCA_ERROR,
                        (int)tioca_common->ca_common.bs_persist_busnum);
 
+        sn_set_err_irq_affinity(SGI_TIOCA_ERROR);
+
         /* Setup locality information */
         controller->node = tioca_kern->ca_closest_node;
         return tioca_common;
diff --git a/arch/ia64/sn/pci/tioce_provider.c b/arch/ia64/sn/pci/tioce_provider.c
index 84b72b27e27f..cee9379d44e0 100644
--- a/arch/ia64/sn/pci/tioce_provider.c
+++ b/arch/ia64/sn/pci/tioce_provider.c
@@ -1034,6 +1034,7 @@ tioce_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *cont
                        tioce_common->ce_pcibus.bs_persist_segment,
                        tioce_common->ce_pcibus.bs_persist_busnum);
 
+        sn_set_err_irq_affinity(SGI_PCIASIC_ERROR);
         return tioce_common;
 }