13 files changed, 36 insertions, 67 deletions

diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 4d4f4188cdf1..9676100b83ee 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -59,9 +59,6 @@ config NEED_DMA_MAP_STATE
 config SWIOTLB
        bool
 
-config IOMMU_HELPER
-       bool
-
 config GENERIC_LOCKBREAK
         def_bool n
 
diff --git a/arch/ia64/hp/common/sba_iommu.c b/arch/ia64/hp/common/sba_iommu.c
index e14c492a8a93..4ce8d1358fee 100644
--- a/arch/ia64/hp/common/sba_iommu.c
+++ b/arch/ia64/hp/common/sba_iommu.c
@@ -2046,13 +2046,13 @@ acpi_sba_ioc_add(struct acpi_device *device)
         struct ioc *ioc;
         acpi_status status;
         u64 hpa, length;
-        struct acpi_device_info *dev_info;
+        struct acpi_device_info *adi;
 
         status = hp_acpi_csr_space(device->handle, &hpa, &length);
         if (ACPI_FAILURE(status))
                 return 1;
 
-        status = acpi_get_object_info(device->handle, &dev_info);
+        status = acpi_get_object_info(device->handle, &adi);
         if (ACPI_FAILURE(status))
                 return 1;
 
@@ -2060,13 +2060,13 @@ acpi_sba_ioc_add(struct acpi_device *device)
          * For HWP0001, only SBA appears in ACPI namespace.  It encloses the PCI
          * root bridges, and its CSR space includes the IOC function.
          */
-        if (strncmp("HWP0001", dev_info->hardware_id.string, 7) == 0) {
+        if (strncmp("HWP0001", adi->hardware_id.string, 7) == 0) {
                 hpa += ZX1_IOC_OFFSET;
                 /* zx1 based systems default to kernel page size iommu pages */
                 if (!iovp_shift)
                         iovp_shift = min(PAGE_SHIFT, 16);
         }
-        kfree(dev_info);
+        kfree(adi);
 
         /*
          * default anything not caught above or specified on cmdline to 4k
diff --git a/arch/ia64/include/asm/mmzone.h b/arch/ia64/include/asm/mmzone.h
index f2ca32069b3f..e0de61709cf1 100644
--- a/arch/ia64/include/asm/mmzone.h
+++ b/arch/ia64/include/asm/mmzone.h
@@ -19,16 +19,12 @@
 
 static inline int pfn_to_nid(unsigned long pfn)
 {
-#ifdef CONFIG_NUMA
         extern int paddr_to_nid(unsigned long);
         int nid = paddr_to_nid(pfn << PAGE_SHIFT);
         if (nid < 0)
                 return 0;
         else
                 return nid;
-#else
-        return 0;
-#endif
 }
 
 #ifdef CONFIG_IA64_DIG /* DIG systems are small */
diff --git a/arch/ia64/include/asm/percpu.h b/arch/ia64/include/asm/percpu.h
index f7c00a5e0e2b..1bd408265694 100644
--- a/arch/ia64/include/asm/percpu.h
+++ b/arch/ia64/include/asm/percpu.h
@@ -39,7 +39,10 @@ extern void *per_cpu_init(void);
  * On the positive side, using __ia64_per_cpu_var() instead of __get_cpu_var() is slightly
  * more efficient.
  */
-#define __ia64_per_cpu_var(var) var
+#define __ia64_per_cpu_var(var) (*({                                    \
+        __verify_pcpu_ptr(&(var));                                      \
+        ((typeof(var) __kernel __force *)&(var));                       \
+}))
 
 #include <asm-generic/percpu.h>
 
diff --git a/arch/ia64/include/asm/thread_info.h b/arch/ia64/include/asm/thread_info.h
index 8ce2e388e37c..b6a5ba2aca34 100644
--- a/arch/ia64/include/asm/thread_info.h
+++ b/arch/ia64/include/asm/thread_info.h
@@ -102,7 +102,7 @@ struct thread_info {
 #define TIF_SINGLESTEP          4       /* restore singlestep on return to user mode */
 #define TIF_NOTIFY_RESUME       6       /* resumption notification requested */
 #define TIF_POLLING_NRFLAG      16      /* true if poll_idle() is polling TIF_NEED_RESCHED */
-#define TIF_MEMDIE              17
+#define TIF_MEMDIE              17      /* is terminating due to OOM killer */
 #define TIF_MCA_INIT            18      /* this task is processing MCA or INIT */
 #define TIF_DB_DISABLED         19      /* debug trap disabled for fsyscall */
 #define TIF_FREEZE              20      /* is freezing for suspend */
diff --git a/arch/ia64/kernel/cpufreq/acpi-cpufreq.c b/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
index b0b4e6e710f2..22f61526a8e1 100644
--- a/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
+++ b/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
@@ -113,7 +113,7 @@ processor_get_freq (
         dprintk("processor_get_freq\n");
 
         saved_mask = current->cpus_allowed;
-        set_cpus_allowed(current, cpumask_of_cpu(cpu));
+        set_cpus_allowed_ptr(current, cpumask_of(cpu));
         if (smp_processor_id() != cpu)
                 goto migrate_end;
 
@@ -121,7 +121,7 @@ processor_get_freq (
         ret = processor_get_pstate(&value);
 
         if (ret) {
-                set_cpus_allowed(current, saved_mask);
+                set_cpus_allowed_ptr(current, &saved_mask);
                 printk(KERN_WARNING "get performance failed with error %d\n",
                        ret);
                 ret = 0;
@@ -131,7 +131,7 @@ processor_get_freq (
         ret = (clock_freq*1000);
 
 migrate_end:
-        set_cpus_allowed(current, saved_mask);
+        set_cpus_allowed_ptr(current, &saved_mask);
         return ret;
 }
 
@@ -151,7 +151,7 @@ processor_set_freq (
         dprintk("processor_set_freq\n");
 
         saved_mask = current->cpus_allowed;
-        set_cpus_allowed(current, cpumask_of_cpu(cpu));
+        set_cpus_allowed_ptr(current, cpumask_of(cpu));
         if (smp_processor_id() != cpu) {
                 retval = -EAGAIN;
                 goto migrate_end;
@@ -208,7 +208,7 @@ processor_set_freq (
         retval = 0;
 
 migrate_end:
-        set_cpus_allowed(current, saved_mask);
+        set_cpus_allowed_ptr(current, &saved_mask);
         return (retval);
 }
 
diff --git a/arch/ia64/kernel/irq_ia64.c b/arch/ia64/kernel/irq_ia64.c
index 640479304ac0..f14c35f9b03a 100644
--- a/arch/ia64/kernel/irq_ia64.c
+++ b/arch/ia64/kernel/irq_ia64.c
@@ -29,6 +29,7 @@
 #include <linux/threads.h>
 #include <linux/bitops.h>
 #include <linux/irq.h>
+#include <linux/ratelimit.h>
 
 #include <asm/delay.h>
 #include <asm/intrinsics.h>
@@ -467,13 +468,9 @@ ia64_handle_irq (ia64_vector vector, struct pt_regs *regs)
                 sp = ia64_getreg(_IA64_REG_SP);
 
                 if ((sp - bsp) < 1024) {
-                        static unsigned char count;
-                        static long last_time;
+                        static DEFINE_RATELIMIT_STATE(ratelimit, 5 * HZ, 5);
 
-                        if (time_after(jiffies, last_time + 5 * HZ))
-                                count = 0;
-                        if (++count < 5) {
-                                last_time = jiffies;
+                        if (__ratelimit(&ratelimit)) {
                                 printk("ia64_handle_irq: DANGER: less than "
                                        "1KB of free stack space!!\n"
                                        "(bsp=0x%lx, sp=%lx)\n", bsp, sp);
diff --git a/arch/ia64/kernel/salinfo.c b/arch/ia64/kernel/salinfo.c
index e6676fca4828..aa8b5fa1a8de 100644
--- a/arch/ia64/kernel/salinfo.c
+++ b/arch/ia64/kernel/salinfo.c
@@ -404,10 +404,9 @@ static void
 call_on_cpu(int cpu, void (*fn)(void *), void *arg)
 {
         cpumask_t save_cpus_allowed = current->cpus_allowed;
-        cpumask_t new_cpus_allowed = cpumask_of_cpu(cpu);
-        set_cpus_allowed(current, new_cpus_allowed);
+        set_cpus_allowed_ptr(current, cpumask_of(cpu));
         (*fn)(arg);
-        set_cpus_allowed(current, save_cpus_allowed);
+        set_cpus_allowed_ptr(current, &save_cpus_allowed);
 }
 
 static void
diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c
index 47a192781b0a..653b3c46ea82 100644
--- a/arch/ia64/kernel/time.c
+++ b/arch/ia64/kernel/time.c
@@ -430,18 +430,16 @@ static int __init rtc_init(void)
 }
 module_init(rtc_init);
 
+void read_persistent_clock(struct timespec *ts)
+{
+        efi_gettimeofday(ts);
+}
+
 void __init
 time_init (void)
 {
         register_percpu_irq(IA64_TIMER_VECTOR, &timer_irqaction);
-        efi_gettimeofday(&xtime);
         ia64_init_itm();
-
-        /*
-         * Initialize wall_to_monotonic such that adding it to xtime will yield zero, the
-         * tv_nsec field must be normalized (i.e., 0 <= nsec < NSEC_PER_SEC).
-         */
-        set_normalized_timespec(&wall_to_monotonic, -xtime.tv_sec, -xtime.tv_nsec);
 }
 
 /*
diff --git a/arch/ia64/kernel/topology.c b/arch/ia64/kernel/topology.c
index 28f299de2903..0baa1bbb65fe 100644
--- a/arch/ia64/kernel/topology.c
+++ b/arch/ia64/kernel/topology.c
@@ -361,12 +361,12 @@ static int __cpuinit cache_add_dev(struct sys_device * sys_dev)
                 return 0;
 
         oldmask = current->cpus_allowed;
-        retval = set_cpus_allowed(current, cpumask_of_cpu(cpu));
+        retval = set_cpus_allowed_ptr(current, cpumask_of(cpu));
         if (unlikely(retval))
                 return retval;
 
         retval = cpu_cache_sysfs_init(cpu);
-        set_cpus_allowed(current, oldmask);
+        set_cpus_allowed_ptr(current, &oldmask);
         if (unlikely(retval < 0))
                 return retval;
 
diff --git a/arch/ia64/kernel/unaligned.c b/arch/ia64/kernel/unaligned.c
index 776dd40397e2..622772b7fb6c 100644
--- a/arch/ia64/kernel/unaligned.c
+++ b/arch/ia64/kernel/unaligned.c
@@ -17,6 +17,7 @@
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/tty.h>
+#include <linux/ratelimit.h>
 
 #include <asm/intrinsics.h>
 #include <asm/processor.h>
@@ -1283,24 +1284,9 @@ emulate_store_float (unsigned long ifa, load_store_t ld, struct pt_regs *regs)
 /*
  * Make sure we log the unaligned access, so that user/sysadmin can notice it and
  * eventually fix the program.  However, we don't want to do that for every access so we
- * pace it with jiffies.  This isn't really MP-safe, but it doesn't really have to be
- * either...
+ * pace it with jiffies.
  */
-static int
-within_logging_rate_limit (void)
-{
-        static unsigned long count, last_time;
-
-        if (time_after(jiffies, last_time + 5 * HZ))
-                count = 0;
-        if (count < 5) {
-                last_time = jiffies;
-                count++;
-                return 1;
-        }
-        return 0;
-
-}
+static DEFINE_RATELIMIT_STATE(logging_rate_limit, 5 * HZ, 5);
 
 void
 ia64_handle_unaligned (unsigned long ifa, struct pt_regs *regs)
@@ -1337,7 +1323,7 @@ ia64_handle_unaligned (unsigned long ifa, struct pt_regs *regs)
 
                 if (!no_unaligned_warning &&
                     !(current->thread.flags & IA64_THREAD_UAC_NOPRINT) &&
-                    within_logging_rate_limit())
+                    __ratelimit(&logging_rate_limit))
                 {
                         char buf[200];  /* comm[] is at most 16 bytes... */
                         size_t len;
@@ -1370,7 +1356,7 @@ ia64_handle_unaligned (unsigned long ifa, struct pt_regs *regs)
                         }
                 }
         } else {
-                if (within_logging_rate_limit()) {
+                if (__ratelimit(&logging_rate_limit)) {
                         printk(KERN_WARNING "kernel unaligned access to 0x%016lx, ip=0x%016lx\n",
                                ifa, regs->cr_iip + ipsr->ri);
                         if (unaligned_dump_stack)
diff --git a/arch/ia64/mm/fault.c b/arch/ia64/mm/fault.c
index 19261a99e623..0799fea4c588 100644
--- a/arch/ia64/mm/fault.c
+++ b/arch/ia64/mm/fault.c
@@ -148,7 +148,6 @@ ia64_do_page_fault (unsigned long address, unsigned long isr, struct pt_regs *re
         if ((vma->vm_flags & mask) != mask)
                 goto bad_area;
 
-  survive:
         /*
          * If for any reason at all we couldn't handle the fault, make
          * sure we exit gracefully rather than endlessly redo the
@@ -276,13 +275,7 @@ ia64_do_page_fault (unsigned long address, unsigned long isr, struct pt_regs *re
 
   out_of_memory:
         up_read(&mm->mmap_sem);
-        if (is_global_init(current)) {
-                yield();
-                down_read(&mm->mmap_sem);
-                goto survive;
-        }
-        printk(KERN_CRIT "VM: killing process %s\n", current->comm);
-        if (user_mode(regs))
-                do_group_exit(SIGKILL);
-        goto no_context;
+        if (!user_mode(regs))
+                goto no_context;
+        pagefault_out_of_memory();
 }
diff --git a/arch/ia64/sn/kernel/sn2/sn_hwperf.c b/arch/ia64/sn/kernel/sn2/sn_hwperf.c
index 55ac3c4e11d2..f6c1c5fd075d 100644
--- a/arch/ia64/sn/kernel/sn2/sn_hwperf.c
+++ b/arch/ia64/sn/kernel/sn2/sn_hwperf.c
@@ -629,9 +629,9 @@ static int sn_hwperf_op_cpu(struct sn_hwperf_op_info *op_info)
                 else {
                         /* migrate the task before calling SAL */ 
                         save_allowed = current->cpus_allowed;
-                        set_cpus_allowed(current, cpumask_of_cpu(cpu));
+                        set_cpus_allowed_ptr(current, cpumask_of(cpu));
                         sn_hwperf_call_sal(op_info);
-                        set_cpus_allowed(current, save_allowed);
+                        set_cpus_allowed_ptr(current, &save_allowed);
                 }
         }
         r = op_info->ret;