14 files changed, 82 insertions, 91 deletions

diff --git a/Documentation/lockdep-design.txt b/Documentation/lockdep-design.txt
index 938ea22f2cc0..e20d913d5914 100644
--- a/Documentation/lockdep-design.txt
+++ b/Documentation/lockdep-design.txt
@@ -54,9 +54,9 @@ locking error messages, inside curlies. A contrived example:
 The bit position indicates STATE, STATE-read, for each of the states listed
 above, and the character displayed in each indicates:
 
-   '.'  acquired while irqs disabled
-   '+'  acquired in irq context
-   '-'  acquired with irqs enabled
+   '.'  acquired while irqs disabled and not in irq context
+   '-'  acquired in irq context
+   '+'  acquired with irqs enabled
    '?'  acquired in irq context with irqs enabled.
 
 Unused mutexes cannot be part of the cause of an error.
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index 42c33cebf00f..8c0be0902dac 100644
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -49,10 +49,10 @@
 #define IVHD_DEV_EXT_SELECT             0x46
 #define IVHD_DEV_EXT_SELECT_RANGE       0x47
 
-#define IVHD_FLAG_HT_TUN_EN             0x00
-#define IVHD_FLAG_PASSPW_EN             0x01
-#define IVHD_FLAG_RESPASSPW_EN          0x02
-#define IVHD_FLAG_ISOC_EN               0x03
+#define IVHD_FLAG_HT_TUN_EN_MASK        0x01
+#define IVHD_FLAG_PASSPW_EN_MASK        0x02
+#define IVHD_FLAG_RESPASSPW_EN_MASK     0x04
+#define IVHD_FLAG_ISOC_EN_MASK          0x08
 
 #define IVMD_FLAG_EXCL_RANGE            0x08
 #define IVMD_FLAG_UNITY_MAP             0x01
@@ -569,19 +569,19 @@ static void __init init_iommu_from_acpi(struct amd_iommu *iommu,
          * First set the recommended feature enable bits from ACPI
          * into the IOMMU control registers
          */
-        h->flags & IVHD_FLAG_HT_TUN_EN ?
+        h->flags & IVHD_FLAG_HT_TUN_EN_MASK ?
                 iommu_feature_enable(iommu, CONTROL_HT_TUN_EN) :
                 iommu_feature_disable(iommu, CONTROL_HT_TUN_EN);
 
-        h->flags & IVHD_FLAG_PASSPW_EN ?
+        h->flags & IVHD_FLAG_PASSPW_EN_MASK ?
                 iommu_feature_enable(iommu, CONTROL_PASSPW_EN) :
                 iommu_feature_disable(iommu, CONTROL_PASSPW_EN);
 
-        h->flags & IVHD_FLAG_RESPASSPW_EN ?
+        h->flags & IVHD_FLAG_RESPASSPW_EN_MASK ?
                 iommu_feature_enable(iommu, CONTROL_RESPASSPW_EN) :
                 iommu_feature_disable(iommu, CONTROL_RESPASSPW_EN);
 
-        h->flags & IVHD_FLAG_ISOC_EN ?
+        h->flags & IVHD_FLAG_ISOC_EN_MASK ?
                 iommu_feature_enable(iommu, CONTROL_ISOC_EN) :
                 iommu_feature_disable(iommu, CONTROL_ISOC_EN);
 
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index c4f667896c28..c1caefc82e62 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1203,6 +1203,8 @@ void __cpuinit cpu_init(void)
         load_TR_desc();
         load_LDT(&init_mm.context);
 
+        t->x86_tss.io_bitmap_base = offsetof(struct tss_struct, io_bitmap);
+
 #ifdef CONFIG_DOUBLEFAULT
         /* Set up doublefault TSS pointer in the GDT */
         __set_tss_desc(cpu, GDT_ENTRY_DOUBLEFAULT_TSS, &doublefault_tss);
diff --git a/arch/x86/kernel/cpu/proc.c b/arch/x86/kernel/cpu/proc.c
index f93047fed791..d5e30397246b 100644
--- a/arch/x86/kernel/cpu/proc.c
+++ b/arch/x86/kernel/cpu/proc.c
@@ -14,7 +14,7 @@ static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
         if (c->x86_max_cores * smp_num_siblings > 1) {
                 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
                 seq_printf(m, "siblings\t: %d\n",
-                           cpumask_weight(cpu_sibling_mask(cpu)));
+                           cpumask_weight(cpu_core_mask(cpu)));
                 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
                 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
                 seq_printf(m, "apicid\t\t: %d\n", c->apicid);
diff --git a/arch/x86/mm/kmmio.c b/arch/x86/mm/kmmio.c
index 4f115e00486b..50dc802a1c46 100644
--- a/arch/x86/mm/kmmio.c
+++ b/arch/x86/mm/kmmio.c
@@ -87,7 +87,7 @@ static struct kmmio_probe *get_kmmio_probe(unsigned long addr)
 {
         struct kmmio_probe *p;
         list_for_each_entry_rcu(p, &kmmio_probes, list) {
-                if (addr >= p->addr && addr <= (p->addr + p->len))
+                if (addr >= p->addr && addr < (p->addr + p->len))
                         return p;
         }
         return NULL;
diff --git a/arch/x86/vdso/vclock_gettime.c b/arch/x86/vdso/vclock_gettime.c
index d9d35824c56f..6a40b78b46aa 100644
--- a/arch/x86/vdso/vclock_gettime.c
+++ b/arch/x86/vdso/vclock_gettime.c
@@ -104,11 +104,13 @@ notrace int __vdso_gettimeofday(struct timeval *tv, struct timezone *tz)
 {
         long ret;
         if (likely(gtod->sysctl_enabled && gtod->clock.vread)) {
-                BUILD_BUG_ON(offsetof(struct timeval, tv_usec) !=
-                             offsetof(struct timespec, tv_nsec) ||
-                             sizeof(*tv) != sizeof(struct timespec));
-                do_realtime((struct timespec *)tv);
-                tv->tv_usec /= 1000;
+                if (likely(tv != NULL)) {
+                        BUILD_BUG_ON(offsetof(struct timeval, tv_usec) !=
+                                     offsetof(struct timespec, tv_nsec) ||
+                                     sizeof(*tv) != sizeof(struct timespec));
+                        do_realtime((struct timespec *)tv);
+                        tv->tv_usec /= 1000;
+                }
                 if (unlikely(tz != NULL)) {
                         /* Avoid memcpy. Some old compilers fail to inline it */
                         tz->tz_minuteswest = gtod->sys_tz.tz_minuteswest;
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index d82142be8dd2..26e08754744f 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -363,8 +363,6 @@ irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action)
         irqreturn_t ret, retval = IRQ_NONE;
         unsigned int status = 0;
 
-        WARN_ONCE(!in_irq(), "BUG: IRQ handler called from non-hardirq context!");
-
         if (!(action->flags & IRQF_DISABLED))
                 local_irq_enable_in_hardirq();
 
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index c9dcf98b4463..bece7c0b67b2 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -1420,19 +1420,19 @@ void run_posix_cpu_timers(struct task_struct *tsk)
          * timer call will interfere.
          */
         list_for_each_entry_safe(timer, next, &firing, it.cpu.entry) {
-                int firing;
+                int cpu_firing;
+
                 spin_lock(&timer->it_lock);
                 list_del_init(&timer->it.cpu.entry);
-                firing = timer->it.cpu.firing;
+                cpu_firing = timer->it.cpu.firing;
                 timer->it.cpu.firing = 0;
                 /*
                  * The firing flag is -1 if we collided with a reset
                  * of the timer, which already reported this
                  * almost-firing as an overrun.  So don't generate an event.
                  */
-                if (likely(firing >= 0)) {
+                if (likely(cpu_firing >= 0))
                         cpu_timer_fire(timer);
-                }
                 spin_unlock(&timer->it_lock);
         }
 }
diff --git a/kernel/sched.c b/kernel/sched.c
index b902e587a3a0..26efa475bdc1 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -4732,7 +4732,7 @@ void account_process_tick(struct task_struct *p, int user_tick)
 
         if (user_tick)
                 account_user_time(p, one_jiffy, one_jiffy_scaled);
-        else if (p != rq->idle)
+        else if ((p != rq->idle) || (irq_count() != HARDIRQ_OFFSET))
                 account_system_time(p, HARDIRQ_OFFSET, one_jiffy,
                                     one_jiffy_scaled);
         else
diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c
index 21a5ca849514..83c4417b6a3c 100644
--- a/kernel/time/tick-common.c
+++ b/kernel/time/tick-common.c
@@ -93,7 +93,17 @@ void tick_handle_periodic(struct clock_event_device *dev)
         for (;;) {
                 if (!clockevents_program_event(dev, next, ktime_get()))
                         return;
-                tick_periodic(cpu);
+                /*
+                 * Have to be careful here. If we're in oneshot mode,
+                 * before we call tick_periodic() in a loop, we need
+                 * to be sure we're using a real hardware clocksource.
+                 * Otherwise we could get trapped in an infinite
+                 * loop, as the tick_periodic() increments jiffies,
+                 * when then will increment time, posibly causing
+                 * the loop to trigger again and again.
+                 */
+                if (timekeeping_valid_for_hres())
+                        tick_periodic(cpu);
                 next = ktime_add(next, tick_period);
         }
 }
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 1ce5dc6372b8..a884c09006c4 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -3448,6 +3448,7 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos,
                 if (!ref)
                         break;
 
+                ref->ref = 1;
                 ref->buffer = info->tr->buffer;
                 ref->page = ring_buffer_alloc_read_page(ref->buffer);
                 if (!ref->page) {
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index d3da7edc034f..69da09a085a1 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -400,60 +400,9 @@ out_err:
         return -ENOMEM;
 }
 
-static int device_dma_allocations(struct device *dev)
-{
-        struct dma_debug_entry *entry;
-        unsigned long flags;
-        int count = 0, i;
-
-        for (i = 0; i < HASH_SIZE; ++i) {
-                spin_lock_irqsave(&dma_entry_hash[i].lock, flags);
-                list_for_each_entry(entry, &dma_entry_hash[i].list, list) {
-                        if (entry->dev == dev)
-                                count += 1;
-                }
-                spin_unlock_irqrestore(&dma_entry_hash[i].lock, flags);
-        }
-
-        return count;
-}
-
-static int dma_debug_device_change(struct notifier_block *nb,
-                                    unsigned long action, void *data)
-{
-        struct device *dev = data;
-        int count;
-
-
-        switch (action) {
-        case BUS_NOTIFY_UNBIND_DRIVER:
-                count = device_dma_allocations(dev);
-                if (count == 0)
-                        break;
-                err_printk(dev, NULL, "DMA-API: device driver has pending "
-                                "DMA allocations while released from device "
-                                "[count=%d]\n", count);
-                break;
-        default:
-                break;
-        }
-
-        return 0;
-}
-
 void dma_debug_add_bus(struct bus_type *bus)
 {
-        struct notifier_block *nb;
-
-        nb = kzalloc(sizeof(struct notifier_block), GFP_KERNEL);
-        if (nb == NULL) {
-                printk(KERN_ERR "dma_debug_add_bus: out of memory\n");
-                return;
-        }
-
-        nb->notifier_call = dma_debug_device_change;
-
-        bus_register_notifier(bus, nb);
+        /* FIXME: register notifier */
 }
 
 /*
diff --git a/mm/madvise.c b/mm/madvise.c
index b9ce574827c8..36d6ea2b6340 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -112,6 +112,14 @@ static long madvise_willneed(struct vm_area_struct * vma,
         if (!file)
                 return -EBADF;
 
+        /*
+         * Page cache readahead assumes page cache pages are order-0 which
+         * is not the case for hugetlbfs. Do not give a bad return value
+         * but ignore the advice.
+         */
+        if (vma->vm_flags & VM_HUGETLB)
+                return 0;
+
         if (file->f_mapping->a_ops->get_xip_mem) {
                 /* no bad return value, but ignore advice */
                 return 0;
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 936b6f8e46ff..161b7846733e 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -384,11 +384,19 @@ static int parse_elf(struct elf_info *info, const char *filename)
                 return 0;
         }
         /* Fix endianness in ELF header */
-        hdr->e_shoff    = TO_NATIVE(hdr->e_shoff);
-        hdr->e_shstrndx = TO_NATIVE(hdr->e_shstrndx);
-        hdr->e_shnum    = TO_NATIVE(hdr->e_shnum);
-        hdr->e_machine  = TO_NATIVE(hdr->e_machine);
-        hdr->e_type     = TO_NATIVE(hdr->e_type);
+        hdr->e_type      = TO_NATIVE(hdr->e_type);
+        hdr->e_machine   = TO_NATIVE(hdr->e_machine);
+        hdr->e_version   = TO_NATIVE(hdr->e_version);
+        hdr->e_entry     = TO_NATIVE(hdr->e_entry);
+        hdr->e_phoff     = TO_NATIVE(hdr->e_phoff);
+        hdr->e_shoff     = TO_NATIVE(hdr->e_shoff);
+        hdr->e_flags     = TO_NATIVE(hdr->e_flags);
+        hdr->e_ehsize    = TO_NATIVE(hdr->e_ehsize);
+        hdr->e_phentsize = TO_NATIVE(hdr->e_phentsize);
+        hdr->e_phnum     = TO_NATIVE(hdr->e_phnum);
+        hdr->e_shentsize = TO_NATIVE(hdr->e_shentsize);
+        hdr->e_shnum     = TO_NATIVE(hdr->e_shnum);
+        hdr->e_shstrndx  = TO_NATIVE(hdr->e_shstrndx);
         sechdrs = (void *)hdr + hdr->e_shoff;
         info->sechdrs = sechdrs;
 
@@ -402,13 +410,16 @@ static int parse_elf(struct elf_info *info, const char *filename)
 
         /* Fix endianness in section headers */
         for (i = 0; i < hdr->e_shnum; i++) {
-                sechdrs[i].sh_type   = TO_NATIVE(sechdrs[i].sh_type);
-                sechdrs[i].sh_offset = TO_NATIVE(sechdrs[i].sh_offset);
-                sechdrs[i].sh_size   = TO_NATIVE(sechdrs[i].sh_size);
-                sechdrs[i].sh_link   = TO_NATIVE(sechdrs[i].sh_link);
-                sechdrs[i].sh_name   = TO_NATIVE(sechdrs[i].sh_name);
-                sechdrs[i].sh_info   = TO_NATIVE(sechdrs[i].sh_info);
-                sechdrs[i].sh_addr   = TO_NATIVE(sechdrs[i].sh_addr);
+                sechdrs[i].sh_name      = TO_NATIVE(sechdrs[i].sh_name);
+                sechdrs[i].sh_type      = TO_NATIVE(sechdrs[i].sh_type);
+                sechdrs[i].sh_flags     = TO_NATIVE(sechdrs[i].sh_flags);
+                sechdrs[i].sh_addr      = TO_NATIVE(sechdrs[i].sh_addr);
+                sechdrs[i].sh_offset    = TO_NATIVE(sechdrs[i].sh_offset);
+                sechdrs[i].sh_size      = TO_NATIVE(sechdrs[i].sh_size);
+                sechdrs[i].sh_link      = TO_NATIVE(sechdrs[i].sh_link);
+                sechdrs[i].sh_info      = TO_NATIVE(sechdrs[i].sh_info);
+                sechdrs[i].sh_addralign = TO_NATIVE(sechdrs[i].sh_addralign);
+                sechdrs[i].sh_entsize   = TO_NATIVE(sechdrs[i].sh_entsize);
         }
         /* Find symbol table. */
         for (i = 1; i < hdr->e_shnum; i++) {
@@ -716,7 +727,17 @@ int match(const char *sym, const char * const pat[])
 
 /* sections that we do not want to do full section mismatch check on */
 static const char *section_white_list[] =
-        { ".comment", ".debug*", ".stab*", ".note*", ".got*", ".toc*", NULL };
+{
+        ".comment*",
+        ".debug*",
+        ".mdebug*",        /* alpha, score, mips etc. */
+        ".pdr",            /* alpha, score, mips etc. */
+        ".stab*",
+        ".note*",
+        ".got*",
+        ".toc*",
+        NULL
+};
 
 /*
  * This is used to find sections missing the SHF_ALLOC flag.