11 files changed, 436 insertions, 249 deletions

diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c
index 7e926471e4ec..9ad94ddf6687 100644
--- a/arch/ia64/kernel/acpi.c
+++ b/arch/ia64/kernel/acpi.c
@@ -838,7 +838,7 @@ EXPORT_SYMBOL(acpi_unmap_lsapic);
 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 
 #ifdef CONFIG_ACPI_NUMA
-acpi_status __devinit
+static acpi_status __devinit
 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
 {
         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
@@ -890,7 +890,16 @@ acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
         map_iosapic_to_node(gsi_base, node);
         return AE_OK;
 }
-#endif                          /* CONFIG_NUMA */
+
+static int __init
+acpi_map_iosapics (void)
+{
+        acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
+        return 0;
+}
+
+fs_initcall(acpi_map_iosapics);
+#endif                          /* CONFIG_ACPI_NUMA */
 
 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 {
diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c
index 179f230816ed..f72ea6aebcb1 100644
--- a/arch/ia64/kernel/efi.c
+++ b/arch/ia64/kernel/efi.c
@@ -239,57 +239,30 @@ is_available_memory (efi_memory_desc_t *md)
         return 0;
 }
 
-/*
- * Trim descriptor MD so its starts at address START_ADDR.  If the descriptor covers
- * memory that is normally available to the kernel, issue a warning that some memory
- * is being ignored.
- */
-static void
-trim_bottom (efi_memory_desc_t *md, u64 start_addr)
-{
-        u64 num_skipped_pages;
+typedef struct kern_memdesc {
+        u64 attribute;
+        u64 start;
+        u64 num_pages;
+} kern_memdesc_t;
 
-        if (md->phys_addr >= start_addr || !md->num_pages)
-                return;
-
-        num_skipped_pages = (start_addr - md->phys_addr) >> EFI_PAGE_SHIFT;
-        if (num_skipped_pages > md->num_pages)
-                num_skipped_pages = md->num_pages;
-
-        if (is_available_memory(md))
-                printk(KERN_NOTICE "efi.%s: ignoring %luKB of memory at 0x%lx due to granule hole "
-                       "at 0x%lx\n", __FUNCTION__,
-                       (num_skipped_pages << EFI_PAGE_SHIFT) >> 10,
-                       md->phys_addr, start_addr - IA64_GRANULE_SIZE);
-        /*
-         * NOTE: Don't set md->phys_addr to START_ADDR because that could cause the memory
-         * descriptor list to become unsorted.  In such a case, md->num_pages will be
-         * zero, so the Right Thing will happen.
-         */
-        md->phys_addr += num_skipped_pages << EFI_PAGE_SHIFT;
-        md->num_pages -= num_skipped_pages;
-}
+static kern_memdesc_t *kern_memmap;
 
 static void
-trim_top (efi_memory_desc_t *md, u64 end_addr)
+walk (efi_freemem_callback_t callback, void *arg, u64 attr)
 {
-        u64 num_dropped_pages, md_end_addr;
-
-        md_end_addr = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT);
-
-        if (md_end_addr <= end_addr || !md->num_pages)
-                return;
+        kern_memdesc_t *k;
+        u64 start, end, voff;
 
-        num_dropped_pages = (md_end_addr - end_addr) >> EFI_PAGE_SHIFT;
-        if (num_dropped_pages > md->num_pages)
-                num_dropped_pages = md->num_pages;
-
-        if (is_available_memory(md))
-                printk(KERN_NOTICE "efi.%s: ignoring %luKB of memory at 0x%lx due to granule hole "
-                       "at 0x%lx\n", __FUNCTION__,
-                       (num_dropped_pages << EFI_PAGE_SHIFT) >> 10,
-                       md->phys_addr, end_addr);
-        md->num_pages -= num_dropped_pages;
+        voff = (attr == EFI_MEMORY_WB) ? PAGE_OFFSET : __IA64_UNCACHED_OFFSET;
+        for (k = kern_memmap; k->start != ~0UL; k++) {
+                if (k->attribute != attr)
+                        continue;
+                start = PAGE_ALIGN(k->start);
+                end = (k->start + (k->num_pages << EFI_PAGE_SHIFT)) & PAGE_MASK;
+                if (start < end)
+                        if ((*callback)(start + voff, end + voff, arg) < 0)
+                                return;
+        }
 }
 
 /*
@@ -299,148 +272,19 @@ trim_top (efi_memory_desc_t *md, u64 end_addr)
 void
 efi_memmap_walk (efi_freemem_callback_t callback, void *arg)
 {
-        int prev_valid = 0;
-        struct range {
-                u64 start;
-                u64 end;
-        } prev, curr;
-        void *efi_map_start, *efi_map_end, *p, *q;
-        efi_memory_desc_t *md, *check_md;
-        u64 efi_desc_size, start, end, granule_addr, last_granule_addr, first_non_wb_addr = 0;
-        unsigned long total_mem = 0;
-
-        efi_map_start = __va(ia64_boot_param->efi_memmap);
-        efi_map_end   = efi_map_start + ia64_boot_param->efi_memmap_size;
-        efi_desc_size = ia64_boot_param->efi_memdesc_size;
-
-        for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
-                md = p;
-
-                /* skip over non-WB memory descriptors; that's all we're interested in... */
-                if (!(md->attribute & EFI_MEMORY_WB))
-                        continue;
-
-                /*
-                 * granule_addr is the base of md's first granule.
-                 * [granule_addr - first_non_wb_addr) is guaranteed to
-                 * be contiguous WB memory.
-                 */
-                granule_addr = GRANULEROUNDDOWN(md->phys_addr);
-                first_non_wb_addr = max(first_non_wb_addr, granule_addr);
-
-                if (first_non_wb_addr < md->phys_addr) {
-                        trim_bottom(md, granule_addr + IA64_GRANULE_SIZE);
-                        granule_addr = GRANULEROUNDDOWN(md->phys_addr);
-                        first_non_wb_addr = max(first_non_wb_addr, granule_addr);
-                }
-
-                for (q = p; q < efi_map_end; q += efi_desc_size) {
-                        check_md = q;
-
-                        if ((check_md->attribute & EFI_MEMORY_WB) &&
-                            (check_md->phys_addr == first_non_wb_addr))
-                                first_non_wb_addr += check_md->num_pages << EFI_PAGE_SHIFT;
-                        else
-                                break;          /* non-WB or hole */
-                }
-
-                last_granule_addr = GRANULEROUNDDOWN(first_non_wb_addr);
-                if (last_granule_addr < md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT))
-                        trim_top(md, last_granule_addr);
-
-                if (is_available_memory(md)) {
-                        if (md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) >= max_addr) {
-                                if (md->phys_addr >= max_addr)
-                                        continue;
-                                md->num_pages = (max_addr - md->phys_addr) >> EFI_PAGE_SHIFT;
-                                first_non_wb_addr = max_addr;
-                        }
-
-                        if (total_mem >= mem_limit)
-                                continue;
-
-                        if (total_mem + (md->num_pages << EFI_PAGE_SHIFT) > mem_limit) {
-                                unsigned long limit_addr = md->phys_addr;
-
-                                limit_addr += mem_limit - total_mem;
-                                limit_addr = GRANULEROUNDDOWN(limit_addr);
-
-                                if (md->phys_addr > limit_addr)
-                                        continue;
-
-                                md->num_pages = (limit_addr - md->phys_addr) >>
-                                                EFI_PAGE_SHIFT;
-                                first_non_wb_addr = max_addr = md->phys_addr +
-                                              (md->num_pages << EFI_PAGE_SHIFT);
-                        }
-                        total_mem += (md->num_pages << EFI_PAGE_SHIFT);
-
-                        if (md->num_pages == 0)
-                                continue;
-
-                        curr.start = PAGE_OFFSET + md->phys_addr;
-                        curr.end   = curr.start + (md->num_pages << EFI_PAGE_SHIFT);
-
-                        if (!prev_valid) {
-                                prev = curr;
-                                prev_valid = 1;
-                        } else {
-                                if (curr.start < prev.start)
-                                        printk(KERN_ERR "Oops: EFI memory table not ordered!\n");
-
-                                if (prev.end == curr.start) {
-                                        /* merge two consecutive memory ranges */
-                                        prev.end = curr.end;
-                                } else {
-                                        start = PAGE_ALIGN(prev.start);
-                                        end = prev.end & PAGE_MASK;
-                                        if ((end > start) && (*callback)(start, end, arg) < 0)
-                                                return;
-                                        prev = curr;
-                                }
-                        }
-                }
-        }
-        if (prev_valid) {
-                start = PAGE_ALIGN(prev.start);
-                end = prev.end & PAGE_MASK;
-                if (end > start)
-                        (*callback)(start, end, arg);
-        }
+        walk(callback, arg, EFI_MEMORY_WB);
 }
 
 /*
- * Walk the EFI memory map to pull out leftover pages in the lower
- * memory regions which do not end up in the regular memory map and
- * stick them into the uncached allocator
- *
- * The regular walk function is significantly more complex than the
- * uncached walk which means it really doesn't make sense to try and
- * marge the two.
+ * Walks the EFI memory map and calls CALLBACK once for each EFI memory descriptor that
+ * has memory that is available for uncached allocator.
  */
-void __init
-efi_memmap_walk_uc (efi_freemem_callback_t callback)
+void
+efi_memmap_walk_uc (efi_freemem_callback_t callback, void *arg)
 {
-        void *efi_map_start, *efi_map_end, *p;
-        efi_memory_desc_t *md;
-        u64 efi_desc_size, start, end;
-
-        efi_map_start = __va(ia64_boot_param->efi_memmap);
-        efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
-        efi_desc_size = ia64_boot_param->efi_memdesc_size;
-
-        for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
-                md = p;
-                if (md->attribute == EFI_MEMORY_UC) {
-                        start = PAGE_ALIGN(md->phys_addr);
-                        end = PAGE_ALIGN((md->phys_addr+(md->num_pages << EFI_PAGE_SHIFT)) & PAGE_MASK);
-                        if ((*callback)(start, end, NULL) < 0)
-                                return;
-                }
-        }
+        walk(callback, arg, EFI_MEMORY_UC);
 }
 
-
 /*
  * Look for the PAL_CODE region reported by EFI and maps it using an
  * ITR to enable safe PAL calls in virtual mode.  See IA-64 Processor
@@ -862,3 +706,307 @@ efi_uart_console_only(void)
         printk(KERN_ERR "Malformed %s value\n", name);
         return 0;
 }
+
+#define efi_md_size(md) (md->num_pages << EFI_PAGE_SHIFT)
+
+static inline u64
+kmd_end(kern_memdesc_t *kmd)
+{
+        return (kmd->start + (kmd->num_pages << EFI_PAGE_SHIFT));
+}
+
+static inline u64
+efi_md_end(efi_memory_desc_t *md)
+{
+        return (md->phys_addr + efi_md_size(md));
+}
+
+static inline int
+efi_wb(efi_memory_desc_t *md)
+{
+        return (md->attribute & EFI_MEMORY_WB);
+}
+
+static inline int
+efi_uc(efi_memory_desc_t *md)
+{
+        return (md->attribute & EFI_MEMORY_UC);
+}
+
+/*
+ * Look for the first granule aligned memory descriptor memory
+ * that is big enough to hold EFI memory map. Make sure this
+ * descriptor is atleast granule sized so it does not get trimmed
+ */
+struct kern_memdesc *
+find_memmap_space (void)
+{
+        u64     contig_low=0, contig_high=0;
+        u64     as = 0, ae;
+        void *efi_map_start, *efi_map_end, *p, *q;
+        efi_memory_desc_t *md, *pmd = NULL, *check_md;
+        u64     space_needed, efi_desc_size;
+        unsigned long total_mem = 0;
+
+        efi_map_start = __va(ia64_boot_param->efi_memmap);
+        efi_map_end   = efi_map_start + ia64_boot_param->efi_memmap_size;
+        efi_desc_size = ia64_boot_param->efi_memdesc_size;
+
+        /*
+         * Worst case: we need 3 kernel descriptors for each efi descriptor
+         * (if every entry has a WB part in the middle, and UC head and tail),
+         * plus one for the end marker.
+         */
+        space_needed = sizeof(kern_memdesc_t) *
+                (3 * (ia64_boot_param->efi_memmap_size/efi_desc_size) + 1);
+
+        for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) {
+                md = p;
+                if (!efi_wb(md)) {
+                        continue;
+                }
+                if (pmd == NULL || !efi_wb(pmd) || efi_md_end(pmd) != md->phys_addr) {
+                        contig_low = GRANULEROUNDUP(md->phys_addr);
+                        contig_high = efi_md_end(md);
+                        for (q = p + efi_desc_size; q < efi_map_end; q += efi_desc_size) {
+                                check_md = q;
+                                if (!efi_wb(check_md))
+                                        break;
+                                if (contig_high != check_md->phys_addr)
+                                        break;
+                                contig_high = efi_md_end(check_md);
+                        }
+                        contig_high = GRANULEROUNDDOWN(contig_high);
+                }
+                if (!is_available_memory(md) || md->type == EFI_LOADER_DATA)
+                        continue;
+
+                /* Round ends inward to granule boundaries */
+                as = max(contig_low, md->phys_addr);
+                ae = min(contig_high, efi_md_end(md));
+
+                /* keep within max_addr= command line arg */
+                ae = min(ae, max_addr);
+                if (ae <= as)
+                        continue;
+
+                /* avoid going over mem= command line arg */
+                if (total_mem + (ae - as) > mem_limit)
+                        ae -= total_mem + (ae - as) - mem_limit;
+
+                if (ae <= as)
+                        continue;
+
+                if (ae - as > space_needed)
+                        break;
+        }
+        if (p >= efi_map_end)
+                panic("Can't allocate space for kernel memory descriptors");
+
+        return __va(as);
+}
+
+/*
+ * Walk the EFI memory map and gather all memory available for kernel
+ * to use.  We can allocate partial granules only if the unavailable
+ * parts exist, and are WB.
+ */
+void
+efi_memmap_init(unsigned long *s, unsigned long *e)
+{
+        struct kern_memdesc *k, *prev = 0;
+        u64     contig_low=0, contig_high=0;
+        u64     as, ae, lim;
+        void *efi_map_start, *efi_map_end, *p, *q;
+        efi_memory_desc_t *md, *pmd = NULL, *check_md;
+        u64     efi_desc_size;
+        unsigned long total_mem = 0;
+
+        k = kern_memmap = find_memmap_space();
+
+        efi_map_start = __va(ia64_boot_param->efi_memmap);
+        efi_map_end   = efi_map_start + ia64_boot_param->efi_memmap_size;
+        efi_desc_size = ia64_boot_param->efi_memdesc_size;
+
+        for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) {
+                md = p;
+                if (!efi_wb(md)) {
+                        if (efi_uc(md) && (md->type == EFI_CONVENTIONAL_MEMORY ||
+                                           md->type == EFI_BOOT_SERVICES_DATA)) {
+                                k->attribute = EFI_MEMORY_UC;
+                                k->start = md->phys_addr;
+                                k->num_pages = md->num_pages;
+                                k++;
+                        }
+                        continue;
+                }
+                if (pmd == NULL || !efi_wb(pmd) || efi_md_end(pmd) != md->phys_addr) {
+                        contig_low = GRANULEROUNDUP(md->phys_addr);
+                        contig_high = efi_md_end(md);
+                        for (q = p + efi_desc_size; q < efi_map_end; q += efi_desc_size) {
+                                check_md = q;
+                                if (!efi_wb(check_md))
+                                        break;
+                                if (contig_high != check_md->phys_addr)
+                                        break;
+                                contig_high = efi_md_end(check_md);
+                        }
+                        contig_high = GRANULEROUNDDOWN(contig_high);
+                }
+                if (!is_available_memory(md))
+                        continue;
+
+                /*
+                 * Round ends inward to granule boundaries
+                 * Give trimmings to uncached allocator
+                 */
+                if (md->phys_addr < contig_low) {
+                        lim = min(efi_md_end(md), contig_low);
+                        if (efi_uc(md)) {
+                                if (k > kern_memmap && (k-1)->attribute == EFI_MEMORY_UC &&
+                                    kmd_end(k-1) == md->phys_addr) {
+                                        (k-1)->num_pages += (lim - md->phys_addr) >> EFI_PAGE_SHIFT;
+                                } else {
+                                        k->attribute = EFI_MEMORY_UC;
+                                        k->start = md->phys_addr;
+                                        k->num_pages = (lim - md->phys_addr) >> EFI_PAGE_SHIFT;
+                                        k++;
+                                }
+                        }
+                        as = contig_low;
+                } else
+                        as = md->phys_addr;
+
+                if (efi_md_end(md) > contig_high) {
+                        lim = max(md->phys_addr, contig_high);
+                        if (efi_uc(md)) {
+                                if (lim == md->phys_addr && k > kern_memmap &&
+                                    (k-1)->attribute == EFI_MEMORY_UC &&
+                                    kmd_end(k-1) == md->phys_addr) {
+                                        (k-1)->num_pages += md->num_pages;
+                                } else {
+                                        k->attribute = EFI_MEMORY_UC;
+                                        k->start = lim;
+                                        k->num_pages = (efi_md_end(md) - lim) >> EFI_PAGE_SHIFT;
+                                        k++;
+                                }
+                        }
+                        ae = contig_high;
+                } else
+                        ae = efi_md_end(md);
+
+                /* keep within max_addr= command line arg */
+                ae = min(ae, max_addr);
+                if (ae <= as)
+                        continue;
+
+                /* avoid going over mem= command line arg */
+                if (total_mem + (ae - as) > mem_limit)
+                        ae -= total_mem + (ae - as) - mem_limit;
+
+                if (ae <= as)
+                        continue;
+                if (prev && kmd_end(prev) == md->phys_addr) {
+                        prev->num_pages += (ae - as) >> EFI_PAGE_SHIFT;
+                        total_mem += ae - as;
+                        continue;
+                }
+                k->attribute = EFI_MEMORY_WB;
+                k->start = as;
+                k->num_pages = (ae - as) >> EFI_PAGE_SHIFT;
+                total_mem += ae - as;
+                prev = k++;
+        }
+        k->start = ~0L; /* end-marker */
+
+        /* reserve the memory we are using for kern_memmap */
+        *s = (u64)kern_memmap;
+        *e = (u64)++k;
+}
+
+void
+efi_initialize_iomem_resources(struct resource *code_resource,
+                               struct resource *data_resource)
+{
+        struct resource *res;
+        void *efi_map_start, *efi_map_end, *p;
+        efi_memory_desc_t *md;
+        u64 efi_desc_size;
+        char *name;
+        unsigned long flags;
+
+        efi_map_start = __va(ia64_boot_param->efi_memmap);
+        efi_map_end   = efi_map_start + ia64_boot_param->efi_memmap_size;
+        efi_desc_size = ia64_boot_param->efi_memdesc_size;
+
+        res = NULL;
+
+        for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
+                md = p;
+
+                if (md->num_pages == 0) /* should not happen */
+                        continue;
+
+                flags = IORESOURCE_MEM;
+                switch (md->type) {
+
+                        case EFI_MEMORY_MAPPED_IO:
+                        case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
+                                continue;
+
+                        case EFI_LOADER_CODE:
+                        case EFI_LOADER_DATA:
+                        case EFI_BOOT_SERVICES_DATA:
+                        case EFI_BOOT_SERVICES_CODE:
+                        case EFI_CONVENTIONAL_MEMORY:
+                                if (md->attribute & EFI_MEMORY_WP) {
+                                        name = "System ROM";
+                                        flags |= IORESOURCE_READONLY;
+                                } else {
+                                        name = "System RAM";
+                                }
+                                break;
+
+                        case EFI_ACPI_MEMORY_NVS:
+                                name = "ACPI Non-volatile Storage";
+                                flags |= IORESOURCE_BUSY;
+                                break;
+
+                        case EFI_UNUSABLE_MEMORY:
+                                name = "reserved";
+                                flags |= IORESOURCE_BUSY | IORESOURCE_DISABLED;
+                                break;
+
+                        case EFI_RESERVED_TYPE:
+                        case EFI_RUNTIME_SERVICES_CODE:
+                        case EFI_RUNTIME_SERVICES_DATA:
+                        case EFI_ACPI_RECLAIM_MEMORY:
+                        default:
+                                name = "reserved";
+                                flags |= IORESOURCE_BUSY;
+                                break;
+                }
+
+                if ((res = kcalloc(1, sizeof(struct resource), GFP_KERNEL)) == NULL) {
+                        printk(KERN_ERR "failed to alocate resource for iomem\n");
+                        return;
+                }
+
+                res->name = name;
+                res->start = md->phys_addr;
+                res->end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - 1;
+                res->flags = flags;
+
+                if (insert_resource(&iomem_resource, res) < 0)
+                        kfree(res);
+                else {
+                        /*
+                         * We don't know which region contains
+                         * kernel data so we try it repeatedly and
+                         * let the resource manager test it.
+                         */
+                        insert_resource(res, code_resource);
+                        insert_resource(res, data_resource);
+                }
+        }
+}
diff --git a/arch/ia64/kernel/irq.c b/arch/ia64/kernel/irq.c
index 205d98028261..d33244c32759 100644
--- a/arch/ia64/kernel/irq.c
+++ b/arch/ia64/kernel/irq.c
@@ -57,9 +57,9 @@ int show_interrupts(struct seq_file *p, void *v)
 
         if (i == 0) {
                 seq_printf(p, "           ");
-                for (j=0; j<NR_CPUS; j++)
-                        if (cpu_online(j))
-                                seq_printf(p, "CPU%d       ",j);
+                for_each_online_cpu(j) {
+                        seq_printf(p, "CPU%d       ",j);
+                }
                 seq_putc(p, '\n');
         }
 
@@ -72,9 +72,9 @@ int show_interrupts(struct seq_file *p, void *v)
 #ifndef CONFIG_SMP
                 seq_printf(p, "%10u ", kstat_irqs(i));
 #else
-                for (j = 0; j < NR_CPUS; j++)
-                        if (cpu_online(j))
-                                seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
+                for_each_online_cpu(j) {
+                        seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
+                }
 #endif
                 seq_printf(p, " %14s", irq_desc[i].handler->typename);
                 seq_printf(p, "  %s", action->name);
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index d0a5106fba24..52c47da17246 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -508,9 +508,7 @@ ia64_mca_wakeup_all(void)
         int cpu;
 
         /* Clear the Rendez checkin flag for all cpus */
-        for(cpu = 0; cpu < NR_CPUS; cpu++) {
-                if (!cpu_online(cpu))
-                        continue;
+        for_each_online_cpu(cpu) {
                 if (ia64_mc_info.imi_rendez_checkin[cpu] == IA64_MCA_RENDEZ_CHECKIN_DONE)
                         ia64_mca_wakeup(cpu);
         }
diff --git a/arch/ia64/kernel/module.c b/arch/ia64/kernel/module.c
index f1aca7cffd12..7a2f0a798d12 100644
--- a/arch/ia64/kernel/module.c
+++ b/arch/ia64/kernel/module.c
@@ -947,8 +947,8 @@ void
 percpu_modcopy (void *pcpudst, const void *src, unsigned long size)
 {
         unsigned int i;
-        for (i = 0; i < NR_CPUS; i++)
-                if (cpu_possible(i))
-                        memcpy(pcpudst + __per_cpu_offset[i], src, size);
+        for_each_cpu(i) {
+                memcpy(pcpudst + __per_cpu_offset[i], src, size);
+        }
 }
 #endif /* CONFIG_SMP */
diff --git a/arch/ia64/kernel/patch.c b/arch/ia64/kernel/patch.c
index 367804a605fa..6a4ac7d70b35 100644
--- a/arch/ia64/kernel/patch.c
+++ b/arch/ia64/kernel/patch.c
@@ -64,22 +64,30 @@ ia64_patch (u64 insn_addr, u64 mask, u64 val)
 void
 ia64_patch_imm64 (u64 insn_addr, u64 val)
 {
-        ia64_patch(insn_addr,
+        /* The assembler may generate offset pointing to either slot 1
+           or slot 2 for a long (2-slot) instruction, occupying slots 1
+           and 2.  */
+        insn_addr &= -16UL;
+        ia64_patch(insn_addr + 2,
                    0x01fffefe000UL, (  ((val & 0x8000000000000000UL) >> 27) /* bit 63 -> 36 */
                                      | ((val & 0x0000000000200000UL) <<  0) /* bit 21 -> 21 */
                                      | ((val & 0x00000000001f0000UL) <<  6) /* bit 16 -> 22 */
                                      | ((val & 0x000000000000ff80UL) << 20) /* bit  7 -> 27 */
                                      | ((val & 0x000000000000007fUL) << 13) /* bit  0 -> 13 */));
-        ia64_patch(insn_addr - 1, 0x1ffffffffffUL, val >> 22);
+        ia64_patch(insn_addr + 1, 0x1ffffffffffUL, val >> 22);
 }
 
 void
 ia64_patch_imm60 (u64 insn_addr, u64 val)
 {
-        ia64_patch(insn_addr,
+        /* The assembler may generate offset pointing to either slot 1
+           or slot 2 for a long (2-slot) instruction, occupying slots 1
+           and 2.  */
+        insn_addr &= -16UL;
+        ia64_patch(insn_addr + 2,
                    0x011ffffe000UL, (  ((val & 0x0800000000000000UL) >> 23) /* bit 59 -> 36 */
                                      | ((val & 0x00000000000fffffUL) << 13) /* bit  0 -> 13 */));
-        ia64_patch(insn_addr - 1, 0x1fffffffffcUL, val >> 18);
+        ia64_patch(insn_addr + 1, 0x1fffffffffcUL, val >> 18);
 }
 
 /*
diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c
index bbb8bc7c0552..4b19d0410632 100644
--- a/arch/ia64/kernel/ptrace.c
+++ b/arch/ia64/kernel/ptrace.c
@@ -587,8 +587,9 @@ thread_matches (struct task_struct *thread, unsigned long addr)
 static struct task_struct *
 find_thread_for_addr (struct task_struct *child, unsigned long addr)
 {
-        struct task_struct *g, *p;
+        struct task_struct *p;
         struct mm_struct *mm;
+        struct list_head *this, *next;
         int mm_users;
 
         if (!(mm = get_task_mm(child)))
@@ -600,28 +601,21 @@ find_thread_for_addr (struct task_struct *child, unsigned long addr)
                 goto out;               /* not multi-threaded */
 
         /*
-         * First, traverse the child's thread-list.  Good for scalability with
-         * NPTL-threads.
+         * Traverse the current process' children list.  Every task that
+         * one attaches to becomes a child.  And it is only attached children
+         * of the debugger that are of interest (ptrace_check_attach checks
+         * for this).
          */
-        p = child;
-        do {
-                if (thread_matches(p, addr)) {
-                        child = p;
-                        goto out;
-                }
-                if (mm_users-- <= 1)
-                        goto out;
-        } while ((p = next_thread(p)) != child);
-
-        do_each_thread(g, p) {
-                if (child->mm != mm)
+        list_for_each_safe(this, next, &current->children) {
+                p = list_entry(this, struct task_struct, sibling);
+                if (p->mm != mm)
                         continue;
-
                 if (thread_matches(p, addr)) {
                         child = p;
                         goto out;
                 }
-        } while_each_thread(g, p);
+        }
+
   out:
         mmput(mm);
         return child;
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index 1f5c26dbe705..fc56ca2da358 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -78,6 +78,19 @@ struct screen_info screen_info;
 unsigned long vga_console_iobase;
 unsigned long vga_console_membase;
 
+static struct resource data_resource = {
+        .name   = "Kernel data",
+        .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
+};
+
+static struct resource code_resource = {
+        .name   = "Kernel code",
+        .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
+};
+extern void efi_initialize_iomem_resources(struct resource *,
+                struct resource *);
+extern char _text[], _end[], _etext[];
+
 unsigned long ia64_max_cacheline_size;
 unsigned long ia64_iobase;      /* virtual address for I/O accesses */
 EXPORT_SYMBOL(ia64_iobase);
@@ -171,6 +184,22 @@ sort_regions (struct rsvd_region *rsvd_region, int max)
         }
 }
 
+/*
+ * Request address space for all standard resources
+ */
+static int __init register_memory(void)
+{
+        code_resource.start = ia64_tpa(_text);
+        code_resource.end   = ia64_tpa(_etext) - 1;
+        data_resource.start = ia64_tpa(_etext);
+        data_resource.end   = ia64_tpa(_end) - 1;
+        efi_initialize_iomem_resources(&code_resource, &data_resource);
+
+        return 0;
+}
+
+__initcall(register_memory);
+
 /**
  * reserve_memory - setup reserved memory areas
  *
@@ -211,6 +240,9 @@ reserve_memory (void)
         }
 #endif
 
+        efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end);
+        n++;
+
         /* end of memory marker */
         rsvd_region[n].start = ~0UL;
         rsvd_region[n].end   = ~0UL;
@@ -244,28 +276,31 @@ find_initrd (void)
 static void __init
 io_port_init (void)
 {
-        extern unsigned long ia64_iobase;
         unsigned long phys_iobase;
 
         /*
-         *  Set `iobase' to the appropriate address in region 6 (uncached access range).
+         * Set `iobase' based on the EFI memory map or, failing that, the
+         * value firmware left in ar.k0.
          *
-         *  The EFI memory map is the "preferred" location to get the I/O port space base,
-         *  rather the relying on AR.KR0. This should become more clear in future SAL
-         *  specs. We'll fall back to getting it out of AR.KR0 if no appropriate entry is
-         *  found in the memory map.
+         * Note that in ia32 mode, IN/OUT instructions use ar.k0 to compute
+         * the port's virtual address, so ia32_load_state() loads it with a
+         * user virtual address.  But in ia64 mode, glibc uses the
+         * *physical* address in ar.k0 to mmap the appropriate area from
+         * /dev/mem, and the inX()/outX() interfaces use MMIO.  In both
+         * cases, user-mode can only use the legacy 0-64K I/O port space.
+         *
+         * ar.k0 is not involved in kernel I/O port accesses, which can use
+         * any of the I/O port spaces and are done via MMIO using the
+         * virtual mmio_base from the appropriate io_space[].
          */
         phys_iobase = efi_get_iobase();
-        if (phys_iobase)
-                /* set AR.KR0 since this is all we use it for anyway */
-                ia64_set_kr(IA64_KR_IO_BASE, phys_iobase);
-        else {
+        if (!phys_iobase) {
                 phys_iobase = ia64_get_kr(IA64_KR_IO_BASE);
-                printk(KERN_INFO "No I/O port range found in EFI memory map, falling back "
-                       "to AR.KR0\n");
-                printk(KERN_INFO "I/O port base = 0x%lx\n", phys_iobase);
+                printk(KERN_INFO "No I/O port range found in EFI memory map, "
+                        "falling back to AR.KR0 (0x%lx)\n", phys_iobase);
         }
         ia64_iobase = (unsigned long) ioremap(phys_iobase, 0);
+        ia64_set_kr(IA64_KR_IO_BASE, __pa(ia64_iobase));
 
         /* setup legacy IO port space */
         io_space[0].mmio_base = ia64_iobase;
@@ -526,7 +561,7 @@ show_cpuinfo (struct seq_file *m, void *v)
                    c->itc_freq / 1000000, c->itc_freq % 1000000,
                    lpj*HZ/500000, (lpj*HZ/5000) % 100);
 #ifdef CONFIG_SMP
-        seq_printf(m, "siblings   : %u\n", c->num_log);
+        seq_printf(m, "siblings   : %u\n", cpus_weight(cpu_core_map[cpunum]));
         if (c->threads_per_core > 1 || c->cores_per_socket > 1)
                 seq_printf(m,
                            "physical id: %u\n"
diff --git a/arch/ia64/kernel/smp.c b/arch/ia64/kernel/smp.c
index 0166a9847095..657ac99a451c 100644
--- a/arch/ia64/kernel/smp.c
+++ b/arch/ia64/kernel/smp.c
@@ -185,8 +185,8 @@ send_IPI_allbutself (int op)
 {
         unsigned int i;
 
-        for (i = 0; i < NR_CPUS; i++) {
-                if (cpu_online(i) && i != smp_processor_id())
+        for_each_online_cpu(i) {
+                if (i != smp_processor_id())
                         send_IPI_single(i, op);
         }
 }
@@ -199,9 +199,9 @@ send_IPI_all (int op)
 {
         int i;
 
-        for (i = 0; i < NR_CPUS; i++)
-                if (cpu_online(i))
-                        send_IPI_single(i, op);
+        for_each_online_cpu(i) {
+                send_IPI_single(i, op);
+        }
 }
 
 /*
diff --git a/arch/ia64/kernel/smpboot.c b/arch/ia64/kernel/smpboot.c
index 7d72c0d872b3..400a48987124 100644
--- a/arch/ia64/kernel/smpboot.c
+++ b/arch/ia64/kernel/smpboot.c
@@ -694,9 +694,9 @@ smp_cpus_done (unsigned int dummy)
          * Allow the user to impress friends.
          */
 
-        for (cpu = 0; cpu < NR_CPUS; cpu++)
-                if (cpu_online(cpu))
-                        bogosum += cpu_data(cpu)->loops_per_jiffy;
+        for_each_online_cpu(cpu) {
+                bogosum += cpu_data(cpu)->loops_per_jiffy;
+        }
 
         printk(KERN_INFO "Total of %d processors activated (%lu.%02lu BogoMIPS).\n",
                (int)num_online_cpus(), bogosum/(500000/HZ), (bogosum/(5000/HZ))%100);
diff --git a/arch/ia64/kernel/uncached.c b/arch/ia64/kernel/uncached.c
index 4e9d06c48a8b..c6d40446c2c4 100644
--- a/arch/ia64/kernel/uncached.c
+++ b/arch/ia64/kernel/uncached.c
@@ -205,23 +205,18 @@ EXPORT_SYMBOL(uncached_free_page);
 static int __init
 uncached_build_memmap(unsigned long start, unsigned long end, void *arg)
 {
-        long length;
-        unsigned long vstart, vend;
+        long length = end - start;
         int node;
 
-        length = end - start;
-        vstart = start + __IA64_UNCACHED_OFFSET;
-        vend = end + __IA64_UNCACHED_OFFSET;
-
         dprintk(KERN_ERR "uncached_build_memmap(%lx %lx)\n", start, end);
 
-        memset((char *)vstart, 0, length);
+        memset((char *)start, 0, length);
 
-        node = paddr_to_nid(start);
+        node = paddr_to_nid(start - __IA64_UNCACHED_OFFSET);
 
-        for (; vstart < vend ; vstart += PAGE_SIZE) {
-                dprintk(KERN_INFO "sticking %lx into the pool!\n", vstart);
-                gen_pool_free(uncached_pool[node], vstart, PAGE_SIZE);
+        for (; start < end ; start += PAGE_SIZE) {
+                dprintk(KERN_INFO "sticking %lx into the pool!\n", start);
+                gen_pool_free(uncached_pool[node], start, PAGE_SIZE);
         }
 
         return 0;