Merge remote branch 'linus/master' into x86/bootmem

12 files changed, 141 insertions, 175 deletions

diff --git a/arch/x86/mm/extable.c b/arch/x86/mm/extable.c
index 61b41ca3b5a2..d0474ad2a6e5 100644
--- a/arch/x86/mm/extable.c
+++ b/arch/x86/mm/extable.c
@@ -35,34 +35,3 @@ int fixup_exception(struct pt_regs *regs)
 
         return 0;
 }
-
-#ifdef CONFIG_X86_64
-/*
- * Need to defined our own search_extable on X86_64 to work around
- * a B stepping K8 bug.
- */
-const struct exception_table_entry *
-search_extable(const struct exception_table_entry *first,
-               const struct exception_table_entry *last,
-               unsigned long value)
-{
-        /* B stepping K8 bug */
-        if ((value >> 32) == 0)
-                value |= 0xffffffffUL << 32;
-
-        while (first <= last) {
-                const struct exception_table_entry *mid;
-                long diff;
-
-                mid = (last - first) / 2 + first;
-                diff = mid->insn - value;
-                if (diff == 0)
-                        return mid;
-                else if (diff < 0)
-                        first = mid+1;
-                else
-                        last = mid-1;
-        }
-        return NULL;
-}
-#endif
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index f4cee9028cf0..f62777940dfb 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -38,7 +38,8 @@ enum x86_pf_error_code {
  * Returns 0 if mmiotrace is disabled, or if the fault is not
  * handled by mmiotrace:
  */
-static inline int kmmio_fault(struct pt_regs *regs, unsigned long addr)
+static inline int __kprobes
+kmmio_fault(struct pt_regs *regs, unsigned long addr)
 {
         if (unlikely(is_kmmio_active()))
                 if (kmmio_handler(regs, addr) == 1)
@@ -46,7 +47,7 @@ static inline int kmmio_fault(struct pt_regs *regs, unsigned long addr)
         return 0;
 }
 
-static inline int notify_page_fault(struct pt_regs *regs)
+static inline int __kprobes notify_page_fault(struct pt_regs *regs)
 {
         int ret = 0;
 
@@ -240,7 +241,7 @@ void vmalloc_sync_all(void)
  *
  *   Handle a fault on the vmalloc or module mapping area
  */
-static noinline int vmalloc_fault(unsigned long address)
+static noinline __kprobes int vmalloc_fault(unsigned long address)
 {
         unsigned long pgd_paddr;
         pmd_t *pmd_k;
@@ -357,7 +358,7 @@ void vmalloc_sync_all(void)
  *
  * This assumes no large pages in there.
  */
-static noinline int vmalloc_fault(unsigned long address)
+static noinline __kprobes int vmalloc_fault(unsigned long address)
 {
         pgd_t *pgd, *pgd_ref;
         pud_t *pud, *pud_ref;
@@ -658,7 +659,7 @@ no_context(struct pt_regs *regs, unsigned long error_code,
         show_fault_oops(regs, error_code, address);
 
         stackend = end_of_stack(tsk);
-        if (*stackend != STACK_END_MAGIC)
+        if (tsk != &init_task && *stackend != STACK_END_MAGIC)
                 printk(KERN_ALERT "Thread overran stack, or stack corrupted\n");
 
         tsk->thread.cr2         = address;
@@ -860,7 +861,7 @@ static int spurious_fault_check(unsigned long error_code, pte_t *pte)
  * There are no security implications to leaving a stale TLB when
  * increasing the permissions on a page.
  */
-static noinline int
+static noinline __kprobes int
 spurious_fault(unsigned long error_code, unsigned long address)
 {
         pgd_t *pgd;
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index c973f8e2a6cf..9a0c258a86be 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -892,8 +892,7 @@ void __init mem_init(void)
                 reservedpages << (PAGE_SHIFT-10),
                 datasize >> 10,
                 initsize >> 10,
-                (unsigned long) (totalhigh_pages << (PAGE_SHIFT-10))
-               );
+                totalhigh_pages << (PAGE_SHIFT-10));
 
         printk(KERN_INFO "virtual kernel memory layout:\n"
                 "    fixmap  : 0x%08lx - 0x%08lx   (%4ld kB)\n"
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 5198b9bb34ef..69ddfbd91135 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -49,6 +49,7 @@
 #include <asm/numa.h>
 #include <asm/cacheflush.h>
 #include <asm/init.h>
+#include <linux/bootmem.h>
 
 static unsigned long dma_reserve __initdata;
 
@@ -616,6 +617,21 @@ void __init paging_init(void)
  */
 #ifdef CONFIG_MEMORY_HOTPLUG
 /*
+ * After memory hotplug the variables max_pfn, max_low_pfn and high_memory need
+ * updating.
+ */
+static void  update_end_of_memory_vars(u64 start, u64 size)
+{
+        unsigned long end_pfn = PFN_UP(start + size);
+
+        if (end_pfn > max_pfn) {
+                max_pfn = end_pfn;
+                max_low_pfn = end_pfn;
+                high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
+        }
+}
+
+/*
  * Memory is added always to NORMAL zone. This means you will never get
  * additional DMA/DMA32 memory.
  */
@@ -634,6 +650,9 @@ int arch_add_memory(int nid, u64 start, u64 size)
         ret = __add_pages(nid, zone, start_pfn, nr_pages);
         WARN_ON_ONCE(ret);
 
+        /* update max_pfn, max_low_pfn and high_memory */
+        update_end_of_memory_vars(start, size);
+
         return ret;
 }
 EXPORT_SYMBOL_GPL(arch_add_memory);
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 1bf9e08ed733..e404ffe30210 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -133,8 +133,7 @@ static void __iomem *__ioremap_caller(resource_size_t phys_addr,
                                 (unsigned long long)phys_addr,
                                 (unsigned long long)(phys_addr + size),
                                 prot_val, new_prot_val);
-                        free_memtype(phys_addr, phys_addr + size);
-                        return NULL;
+                        goto err_free_memtype;
                 }
                 prot_val = new_prot_val;
         }
@@ -160,26 +159,25 @@ static void __iomem *__ioremap_caller(resource_size_t phys_addr,
          */
         area = get_vm_area_caller(size, VM_IOREMAP, caller);
         if (!area)
-                return NULL;
+                goto err_free_memtype;
         area->phys_addr = phys_addr;
         vaddr = (unsigned long) area->addr;
 
-        if (kernel_map_sync_memtype(phys_addr, size, prot_val)) {
-                free_memtype(phys_addr, phys_addr + size);
-                free_vm_area(area);
-                return NULL;
-        }
+        if (kernel_map_sync_memtype(phys_addr, size, prot_val))
+                goto err_free_area;
 
-        if (ioremap_page_range(vaddr, vaddr + size, phys_addr, prot)) {
-                free_memtype(phys_addr, phys_addr + size);
-                free_vm_area(area);
-                return NULL;
-        }
+        if (ioremap_page_range(vaddr, vaddr + size, phys_addr, prot))
+                goto err_free_area;
 
         ret_addr = (void __iomem *) (vaddr + offset);
         mmiotrace_ioremap(unaligned_phys_addr, unaligned_size, ret_addr);
 
         return ret_addr;
+err_free_area:
+        free_vm_area(area);
+err_free_memtype:
+        free_memtype(phys_addr, phys_addr + size);
+        return NULL;
 }
 
 /**
@@ -246,30 +244,6 @@ void __iomem *ioremap_cache(resource_size_t phys_addr, unsigned long size)
 }
 EXPORT_SYMBOL(ioremap_cache);
 
-static void __iomem *ioremap_default(resource_size_t phys_addr,
-                                        unsigned long size)
-{
-        unsigned long flags;
-        void __iomem *ret;
-        int err;
-
-        /*
-         * - WB for WB-able memory and no other conflicting mappings
-         * - UC_MINUS for non-WB-able memory with no other conflicting mappings
-         * - Inherit from confliting mappings otherwise
-         */
-        err = reserve_memtype(phys_addr, phys_addr + size,
-                                _PAGE_CACHE_WB, &flags);
-        if (err < 0)
-                return NULL;
-
-        ret = __ioremap_caller(phys_addr, size, flags,
-                               __builtin_return_address(0));
-
-        free_memtype(phys_addr, phys_addr + size);
-        return ret;
-}
-
 void __iomem *ioremap_prot(resource_size_t phys_addr, unsigned long size,
                                 unsigned long prot_val)
 {
@@ -345,7 +319,7 @@ void *xlate_dev_mem_ptr(unsigned long phys)
         if (page_is_ram(start >> PAGE_SHIFT))
                 return __va(phys);
 
-        addr = (void __force *)ioremap_default(start, PAGE_SIZE);
+        addr = (void __force *)ioremap_cache(start, PAGE_SIZE);
         if (addr)
                 addr = (void *)((unsigned long)addr | (phys & ~PAGE_MASK));
 
diff --git a/arch/x86/mm/kmemcheck/error.c b/arch/x86/mm/kmemcheck/error.c
index 4901d0dafda6..af3b6c8a436f 100644
--- a/arch/x86/mm/kmemcheck/error.c
+++ b/arch/x86/mm/kmemcheck/error.c
@@ -106,26 +106,25 @@ void kmemcheck_error_recall(void)
 
         switch (e->type) {
         case KMEMCHECK_ERROR_INVALID_ACCESS:
-                printk(KERN_ERR  "WARNING: kmemcheck: Caught %d-bit read "
-                        "from %s memory (%p)\n",
+                printk(KERN_WARNING "WARNING: kmemcheck: Caught %d-bit read from %s memory (%p)\n",
                         8 * e->size, e->state < ARRAY_SIZE(desc) ?
                                 desc[e->state] : "(invalid shadow state)",
                         (void *) e->address);
 
-                printk(KERN_INFO);
+                printk(KERN_WARNING);
                 for (i = 0; i < SHADOW_COPY_SIZE; ++i)
-                        printk("%02x", e->memory_copy[i]);
-                printk("\n");
+                        printk(KERN_CONT "%02x", e->memory_copy[i]);
+                printk(KERN_CONT "\n");
 
-                printk(KERN_INFO);
+                printk(KERN_WARNING);
                 for (i = 0; i < SHADOW_COPY_SIZE; ++i) {
                         if (e->shadow_copy[i] < ARRAY_SIZE(short_desc))
-                                printk(" %c", short_desc[e->shadow_copy[i]]);
+                                printk(KERN_CONT " %c", short_desc[e->shadow_copy[i]]);
                         else
-                                printk(" ?");
+                                printk(KERN_CONT " ?");
                 }
-                printk("\n");
-                printk(KERN_INFO "%*c\n", 2 + 2
+                printk(KERN_CONT "\n");
+                printk(KERN_WARNING "%*c\n", 2 + 2
                         * (int) (e->address & (SHADOW_COPY_SIZE - 1)), '^');
                 break;
         case KMEMCHECK_ERROR_BUG:
diff --git a/arch/x86/mm/kmmio.c b/arch/x86/mm/kmmio.c
index 16ccbd77917f..536fb6823366 100644
--- a/arch/x86/mm/kmmio.c
+++ b/arch/x86/mm/kmmio.c
@@ -5,6 +5,8 @@
  *     2008 Pekka Paalanen <pq@iki.fi>
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/list.h>
 #include <linux/rculist.h>
 #include <linux/spinlock.h>
@@ -136,7 +138,7 @@ static int clear_page_presence(struct kmmio_fault_page *f, bool clear)
         pte_t *pte = lookup_address(f->page, &level);
 
         if (!pte) {
-                pr_err("kmmio: no pte for page 0x%08lx\n", f->page);
+                pr_err("no pte for page 0x%08lx\n", f->page);
                 return -1;
         }
 
@@ -148,7 +150,7 @@ static int clear_page_presence(struct kmmio_fault_page *f, bool clear)
                 clear_pte_presence(pte, clear, &f->old_presence);
                 break;
         default:
-                pr_err("kmmio: unexpected page level 0x%x.\n", level);
+                pr_err("unexpected page level 0x%x.\n", level);
                 return -1;
         }
 
@@ -170,13 +172,14 @@ static int clear_page_presence(struct kmmio_fault_page *f, bool clear)
 static int arm_kmmio_fault_page(struct kmmio_fault_page *f)
 {
         int ret;
-        WARN_ONCE(f->armed, KERN_ERR "kmmio page already armed.\n");
+        WARN_ONCE(f->armed, KERN_ERR pr_fmt("kmmio page already armed.\n"));
         if (f->armed) {
-                pr_warning("kmmio double-arm: page 0x%08lx, ref %d, old %d\n",
-                                        f->page, f->count, !!f->old_presence);
+                pr_warning("double-arm: page 0x%08lx, ref %d, old %d\n",
+                           f->page, f->count, !!f->old_presence);
         }
         ret = clear_page_presence(f, true);
-        WARN_ONCE(ret < 0, KERN_ERR "kmmio arming 0x%08lx failed.\n", f->page);
+        WARN_ONCE(ret < 0, KERN_ERR pr_fmt("arming 0x%08lx failed.\n"),
+                  f->page);
         f->armed = true;
         return ret;
 }
@@ -203,7 +206,7 @@ static void disarm_kmmio_fault_page(struct kmmio_fault_page *f)
  */
 /*
  * Interrupts are disabled on entry as trap3 is an interrupt gate
- * and they remain disabled thorough out this function.
+ * and they remain disabled throughout this function.
  */
 int kmmio_handler(struct pt_regs *regs, unsigned long addr)
 {
@@ -240,24 +243,21 @@ int kmmio_handler(struct pt_regs *regs, unsigned long addr)
                          * condition needs handling by do_page_fault(), the
                          * page really not being present is the most common.
                          */
-                        pr_debug("kmmio: secondary hit for 0x%08lx CPU %d.\n",
-                                        addr, smp_processor_id());
+                        pr_debug("secondary hit for 0x%08lx CPU %d.\n",
+                                 addr, smp_processor_id());
 
                         if (!faultpage->old_presence)
-                                pr_info("kmmio: unexpected secondary hit for "
-                                        "address 0x%08lx on CPU %d.\n", addr,
-                                        smp_processor_id());
+                                pr_info("unexpected secondary hit for address 0x%08lx on CPU %d.\n",
+                                        addr, smp_processor_id());
                 } else {
                         /*
                          * Prevent overwriting already in-flight context.
                          * This should not happen, let's hope disarming at
                          * least prevents a panic.
                          */
-                        pr_emerg("kmmio: recursive probe hit on CPU %d, "
-                                        "for address 0x%08lx. Ignoring.\n",
-                                        smp_processor_id(), addr);
-                        pr_emerg("kmmio: previous hit was at 0x%08lx.\n",
-                                                ctx->addr);
+                        pr_emerg("recursive probe hit on CPU %d, for address 0x%08lx. Ignoring.\n",
+                                 smp_processor_id(), addr);
+                        pr_emerg("previous hit was at 0x%08lx.\n", ctx->addr);
                         disarm_kmmio_fault_page(faultpage);
                 }
                 goto no_kmmio_ctx;
@@ -302,7 +302,7 @@ no_kmmio:
 
 /*
  * Interrupts are disabled on entry as trap1 is an interrupt gate
- * and they remain disabled thorough out this function.
+ * and they remain disabled throughout this function.
  * This must always get called as the pair to kmmio_handler().
  */
 static int post_kmmio_handler(unsigned long condition, struct pt_regs *regs)
@@ -316,8 +316,8 @@ static int post_kmmio_handler(unsigned long condition, struct pt_regs *regs)
                  * something external causing them (f.e. using a debugger while
                  * mmio tracing enabled), or erroneous behaviour
                  */
-                pr_warning("kmmio: unexpected debug trap on CPU %d.\n",
-                                                        smp_processor_id());
+                pr_warning("unexpected debug trap on CPU %d.\n",
+                           smp_processor_id());
                 goto out;
         }
 
@@ -425,7 +425,7 @@ int register_kmmio_probe(struct kmmio_probe *p)
         list_add_rcu(&p->list, &kmmio_probes);
         while (size < size_lim) {
                 if (add_kmmio_fault_page(p->addr + size))
-                        pr_err("kmmio: Unable to set page fault.\n");
+                        pr_err("Unable to set page fault.\n");
                 size += PAGE_SIZE;
         }
 out:
@@ -490,7 +490,7 @@ static void remove_kmmio_fault_pages(struct rcu_head *head)
  * 2. remove_kmmio_fault_pages()
  *    Remove the pages from kmmio_page_table.
  * 3. rcu_free_kmmio_fault_pages()
- *    Actally free the kmmio_fault_page structs as with RCU.
+ *    Actually free the kmmio_fault_page structs as with RCU.
  */
 void unregister_kmmio_probe(struct kmmio_probe *p)
 {
@@ -511,7 +511,7 @@ void unregister_kmmio_probe(struct kmmio_probe *p)
 
         drelease = kmalloc(sizeof(*drelease), GFP_ATOMIC);
         if (!drelease) {
-                pr_crit("kmmio: leaking kmmio_fault_page objects.\n");
+                pr_crit("leaking kmmio_fault_page objects.\n");
                 return;
         }
         drelease->release_list = release_list;
@@ -538,10 +538,17 @@ static int
 kmmio_die_notifier(struct notifier_block *nb, unsigned long val, void *args)
 {
         struct die_args *arg = args;
+        unsigned long* dr6_p = (unsigned long *)ERR_PTR(arg->err);
 
-        if (val == DIE_DEBUG && (arg->err & DR_STEP))
-                if (post_kmmio_handler(arg->err, arg->regs) == 1)
+        if (val == DIE_DEBUG && (*dr6_p & DR_STEP))
+                if (post_kmmio_handler(*dr6_p, arg->regs) == 1) {
+                        /*
+                         * Reset the BS bit in dr6 (pointed by args->err) to
+                         * denote completion of processing
+                         */
+                        *dr6_p &= ~DR_STEP;
                         return NOTIFY_STOP;
+                }
 
         return NOTIFY_DONE;
 }
diff --git a/arch/x86/mm/mmio-mod.c b/arch/x86/mm/mmio-mod.c
index 132772a8ec57..34a3291ca103 100644
--- a/arch/x86/mm/mmio-mod.c
+++ b/arch/x86/mm/mmio-mod.c
@@ -19,6 +19,9 @@
  *
  * Derived from the read-mod example from relay-examples by Tom Zanussi.
  */
+
+#define pr_fmt(fmt) "mmiotrace: " fmt
+
 #define DEBUG 1
 
 #include <linux/module.h>
@@ -36,8 +39,6 @@
 
 #include "pf_in.h"
 
-#define NAME "mmiotrace: "
-
 struct trap_reason {
         unsigned long addr;
         unsigned long ip;
@@ -96,17 +97,18 @@ static void print_pte(unsigned long address)
         pte_t *pte = lookup_address(address, &level);
 
         if (!pte) {
-                pr_err(NAME "Error in %s: no pte for page 0x%08lx\n",
-                                                        __func__, address);
+                pr_err("Error in %s: no pte for page 0x%08lx\n",
+                       __func__, address);
                 return;
         }
 
         if (level == PG_LEVEL_2M) {
-                pr_emerg(NAME "4MB pages are not currently supported: "
-                                                        "0x%08lx\n", address);
+                pr_emerg("4MB pages are not currently supported: 0x%08lx\n",
+                         address);
                 BUG();
         }
-        pr_info(NAME "pte for 0x%lx: 0x%llx 0x%llx\n", address,
+        pr_info("pte for 0x%lx: 0x%llx 0x%llx\n",
+                address,
                 (unsigned long long)pte_val(*pte),
                 (unsigned long long)pte_val(*pte) & _PAGE_PRESENT);
 }
@@ -118,22 +120,21 @@ static void print_pte(unsigned long address)
 static void die_kmmio_nesting_error(struct pt_regs *regs, unsigned long addr)
 {
         const struct trap_reason *my_reason = &get_cpu_var(pf_reason);
-        pr_emerg(NAME "unexpected fault for address: 0x%08lx, "
-                                        "last fault for address: 0x%08lx\n",
-                                        addr, my_reason->addr);
+        pr_emerg("unexpected fault for address: 0x%08lx, last fault for address: 0x%08lx\n",
+                 addr, my_reason->addr);
         print_pte(addr);
         print_symbol(KERN_EMERG "faulting IP is at %s\n", regs->ip);
         print_symbol(KERN_EMERG "last faulting IP was at %s\n", my_reason->ip);
 #ifdef __i386__
         pr_emerg("eax: %08lx   ebx: %08lx   ecx: %08lx   edx: %08lx\n",
-                        regs->ax, regs->bx, regs->cx, regs->dx);
+                 regs->ax, regs->bx, regs->cx, regs->dx);
         pr_emerg("esi: %08lx   edi: %08lx   ebp: %08lx   esp: %08lx\n",
-                        regs->si, regs->di, regs->bp, regs->sp);
+                 regs->si, regs->di, regs->bp, regs->sp);
 #else
         pr_emerg("rax: %016lx   rcx: %016lx   rdx: %016lx\n",
-                                        regs->ax, regs->cx, regs->dx);
+                 regs->ax, regs->cx, regs->dx);
         pr_emerg("rsi: %016lx   rdi: %016lx   rbp: %016lx   rsp: %016lx\n",
-                                regs->si, regs->di, regs->bp, regs->sp);
+                 regs->si, regs->di, regs->bp, regs->sp);
 #endif
         put_cpu_var(pf_reason);
         BUG();
@@ -213,7 +214,7 @@ static void post(struct kmmio_probe *p, unsigned long condition,
         /* this should always return the active_trace count to 0 */
         my_reason->active_traces--;
         if (my_reason->active_traces) {
-                pr_emerg(NAME "unexpected post handler");
+                pr_emerg("unexpected post handler");
                 BUG();
         }
 
@@ -244,7 +245,7 @@ static void ioremap_trace_core(resource_size_t offset, unsigned long size,
         };
 
         if (!trace) {
-                pr_err(NAME "kmalloc failed in ioremap\n");
+                pr_err("kmalloc failed in ioremap\n");
                 return;
         }
 
@@ -282,8 +283,8 @@ void mmiotrace_ioremap(resource_size_t offset, unsigned long size,
         if (!is_enabled()) /* recheck and proper locking in *_core() */
                 return;
 
-        pr_debug(NAME "ioremap_*(0x%llx, 0x%lx) = %p\n",
-                                (unsigned long long)offset, size, addr);
+        pr_debug("ioremap_*(0x%llx, 0x%lx) = %p\n",
+                 (unsigned long long)offset, size, addr);
         if ((filter_offset) && (offset != filter_offset))
                 return;
         ioremap_trace_core(offset, size, addr);
@@ -301,7 +302,7 @@ static void iounmap_trace_core(volatile void __iomem *addr)
         struct remap_trace *tmp;
         struct remap_trace *found_trace = NULL;
 
-        pr_debug(NAME "Unmapping %p.\n", addr);
+        pr_debug("Unmapping %p.\n", addr);
 
         spin_lock_irq(&trace_lock);
         if (!is_enabled())
@@ -363,9 +364,8 @@ static void clear_trace_list(void)
          * Caller also ensures is_enabled() cannot change.
          */
         list_for_each_entry(trace, &trace_list, list) {
-                pr_notice(NAME "purging non-iounmapped "
-                                        "trace @0x%08lx, size 0x%lx.\n",
-                                        trace->probe.addr, trace->probe.len);
+                pr_notice("purging non-iounmapped trace @0x%08lx, size 0x%lx.\n",
+                          trace->probe.addr, trace->probe.len);
                 if (!nommiotrace)
                         unregister_kmmio_probe(&trace->probe);
         }
@@ -387,7 +387,7 @@ static void enter_uniprocessor(void)
 
         if (downed_cpus == NULL &&
             !alloc_cpumask_var(&downed_cpus, GFP_KERNEL)) {
-                pr_notice(NAME "Failed to allocate mask\n");
+                pr_notice("Failed to allocate mask\n");
                 goto out;
         }
 
@@ -395,20 +395,19 @@ static void enter_uniprocessor(void)
         cpumask_copy(downed_cpus, cpu_online_mask);
         cpumask_clear_cpu(cpumask_first(cpu_online_mask), downed_cpus);
         if (num_online_cpus() > 1)
-                pr_notice(NAME "Disabling non-boot CPUs...\n");
+                pr_notice("Disabling non-boot CPUs...\n");
         put_online_cpus();
 
         for_each_cpu(cpu, downed_cpus) {
                 err = cpu_down(cpu);
                 if (!err)
-                        pr_info(NAME "CPU%d is down.\n", cpu);
+                        pr_info("CPU%d is down.\n", cpu);
                 else
-                        pr_err(NAME "Error taking CPU%d down: %d\n", cpu, err);
+                        pr_err("Error taking CPU%d down: %d\n", cpu, err);
         }
 out:
         if (num_online_cpus() > 1)
-                pr_warning(NAME "multiple CPUs still online, "
-                                                "may miss events.\n");
+                pr_warning("multiple CPUs still online, may miss events.\n");
 }
 
 /* __ref because leave_uniprocessor calls cpu_up which is __cpuinit,
@@ -420,13 +419,13 @@ static void __ref leave_uniprocessor(void)
 
         if (downed_cpus == NULL || cpumask_weight(downed_cpus) == 0)
                 return;
-        pr_notice(NAME "Re-enabling CPUs...\n");
+        pr_notice("Re-enabling CPUs...\n");
         for_each_cpu(cpu, downed_cpus) {
                 err = cpu_up(cpu);
                 if (!err)
-                        pr_info(NAME "enabled CPU%d.\n", cpu);
+                        pr_info("enabled CPU%d.\n", cpu);
                 else
-                        pr_err(NAME "cannot re-enable CPU%d: %d\n", cpu, err);
+                        pr_err("cannot re-enable CPU%d: %d\n", cpu, err);
         }
 }
 
@@ -434,8 +433,8 @@ static void __ref leave_uniprocessor(void)
 static void enter_uniprocessor(void)
 {
         if (num_online_cpus() > 1)
-                pr_warning(NAME "multiple CPUs are online, may miss events. "
-                        "Suggest booting with maxcpus=1 kernel argument.\n");
+                pr_warning("multiple CPUs are online, may miss events. "
+                           "Suggest booting with maxcpus=1 kernel argument.\n");
 }
 
 static void leave_uniprocessor(void)
@@ -450,13 +449,13 @@ void enable_mmiotrace(void)
                 goto out;
 
         if (nommiotrace)
-                pr_info(NAME "MMIO tracing disabled.\n");
+                pr_info("MMIO tracing disabled.\n");
         kmmio_init();
         enter_uniprocessor();
         spin_lock_irq(&trace_lock);
         atomic_inc(&mmiotrace_enabled);
         spin_unlock_irq(&trace_lock);
-        pr_info(NAME "enabled.\n");
+        pr_info("enabled.\n");
 out:
         mutex_unlock(&mmiotrace_mutex);
 }
@@ -475,7 +474,7 @@ void disable_mmiotrace(void)
         clear_trace_list(); /* guarantees: no more kmmio callbacks */
         leave_uniprocessor();
         kmmio_cleanup();
-        pr_info(NAME "disabled.\n");
+        pr_info("disabled.\n");
 out:
         mutex_unlock(&mmiotrace_mutex);
 }
diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index a81b7e73275d..ae9648eb1c7f 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -356,9 +356,6 @@ static int free_ram_pages_type(u64 start, u64 end)
  * - _PAGE_CACHE_UC_MINUS
  * - _PAGE_CACHE_UC
  *
- * req_type will have a special case value '-1', when requester want to inherit
- * the memory type from mtrr (if WB), existing PAT, defaulting to UC_MINUS.
- *
  * If new_type is NULL, function will return an error if it cannot reserve the
  * region with req_type. If new_type is non-NULL, function will return
  * available type in new_type in case of no error. In case of any error
@@ -378,9 +375,7 @@ int reserve_memtype(u64 start, u64 end, unsigned long req_type,
         if (!pat_enabled) {
                 /* This is identical to page table setting without PAT */
                 if (new_type) {
-                        if (req_type == -1)
-                                *new_type = _PAGE_CACHE_WB;
-                        else if (req_type == _PAGE_CACHE_WC)
+                        if (req_type == _PAGE_CACHE_WC)
                                 *new_type = _PAGE_CACHE_UC_MINUS;
                         else
                                 *new_type = req_type & _PAGE_CACHE_MASK;
@@ -709,9 +704,8 @@ int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
         if (!range_is_allowed(pfn, size))
                 return 0;
 
-        if (file->f_flags & O_SYNC) {
+        if (file->f_flags & O_DSYNC)
                 flags = _PAGE_CACHE_UC_MINUS;
-        }
 
 #ifdef CONFIG_X86_32
         /*
diff --git a/arch/x86/mm/srat_32.c b/arch/x86/mm/srat_32.c
index 6f8aa33031c7..9324f13492d5 100644
--- a/arch/x86/mm/srat_32.c
+++ b/arch/x86/mm/srat_32.c
@@ -267,6 +267,8 @@ int __init get_memcfg_from_srat(void)
                 e820_register_active_regions(chunk->nid, chunk->start_pfn,
                                              min(chunk->end_pfn, max_pfn));
         }
+        /* for out of order entries in SRAT */
+        sort_node_map();
 
         for_each_online_node(nid) {
                 unsigned long start = node_start_pfn[nid];
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
index 34aa438d60b6..28c68762648f 100644
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -136,7 +136,7 @@ acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
         apicid_to_node[apic_id] = node;
         node_set(node, cpu_nodes_parsed);
         acpi_numa = 1;
-        printk(KERN_INFO "SRAT: PXM %u -> APIC %u -> Node %u\n",
+        printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u\n",
                pxm, apic_id, node);
 }
 
@@ -170,7 +170,7 @@ acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
         apicid_to_node[apic_id] = node;
         node_set(node, cpu_nodes_parsed);
         acpi_numa = 1;
-        printk(KERN_INFO "SRAT: PXM %u -> APIC %u -> Node %u\n",
+        printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u\n",
                pxm, apic_id, node);
 }
 
@@ -229,9 +229,11 @@ update_nodes_add(int node, unsigned long start, unsigned long end)
                         printk(KERN_ERR "SRAT: Hotplug zone not continuous. Partly ignored\n");
         }
 
-        if (changed)
+        if (changed) {
+                node_set(node, cpu_nodes_parsed);
                 printk(KERN_INFO "SRAT: hot plug zone found %Lx - %Lx\n",
                                  nd->start, nd->end);
+        }
 }
 
 /* Callback for parsing of the Proximity Domain <-> Memory Area mappings */
@@ -317,7 +319,7 @@ static int __init nodes_cover_memory(const struct bootnode *nodes)
                 unsigned long s = nodes[i].start >> PAGE_SHIFT;
                 unsigned long e = nodes[i].end >> PAGE_SHIFT;
                 pxmram += e - s;
-                pxmram -= absent_pages_in_range(s, e);
+                pxmram -= __absent_pages_in_range(i, s, e);
                 if ((long)pxmram < 0)
                         pxmram = 0;
         }
@@ -373,6 +375,8 @@ int __init acpi_scan_nodes(unsigned long start, unsigned long end)
         for_each_node_mask(i, nodes_parsed)
                 e820_register_active_regions(i, nodes[i].start >> PAGE_SHIFT,
                                                 nodes[i].end >> PAGE_SHIFT);
+        /* for out of order entries in SRAT */
+        sort_node_map();
         if (!nodes_cover_memory(nodes)) {
                 bad_srat();
                 return -1;
diff --git a/arch/x86/mm/testmmiotrace.c b/arch/x86/mm/testmmiotrace.c
index 427fd1b56df5..8565d944f7cf 100644
--- a/arch/x86/mm/testmmiotrace.c
+++ b/arch/x86/mm/testmmiotrace.c
@@ -1,12 +1,13 @@
 /*
  * Written by Pekka Paalanen, 2008-2009 <pq@iki.fi>
  */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/module.h>
 #include <linux/io.h>
 #include <linux/mmiotrace.h>
 
-#define MODULE_NAME "testmmiotrace"
-
 static unsigned long mmio_address;
 module_param(mmio_address, ulong, 0);
 MODULE_PARM_DESC(mmio_address, " Start address of the mapping of 16 kB "
@@ -30,7 +31,7 @@ static unsigned v32(unsigned i)
 static void do_write_test(void __iomem *p)
 {
         unsigned int i;
-        pr_info(MODULE_NAME ": write test.\n");
+        pr_info("write test.\n");
         mmiotrace_printk("Write test.\n");
 
         for (i = 0; i < 256; i++)
@@ -47,7 +48,7 @@ static void do_read_test(void __iomem *p)
 {
         unsigned int i;
         unsigned errs[3] = { 0 };
-        pr_info(MODULE_NAME ": read test.\n");
+        pr_info("read test.\n");
         mmiotrace_printk("Read test.\n");
 
         for (i = 0; i < 256; i++)
@@ -68,7 +69,7 @@ static void do_read_test(void __iomem *p)
 
 static void do_read_far_test(void __iomem *p)
 {
-        pr_info(MODULE_NAME ": read far test.\n");
+        pr_info("read far test.\n");
         mmiotrace_printk("Read far test.\n");
 
         ioread32(p + read_far);
@@ -78,7 +79,7 @@ static void do_test(unsigned long size)
 {
         void __iomem *p = ioremap_nocache(mmio_address, size);
         if (!p) {
-                pr_err(MODULE_NAME ": could not ioremap, aborting.\n");
+                pr_err("could not ioremap, aborting.\n");
                 return;
         }
         mmiotrace_printk("ioremap returned %p.\n", p);
@@ -94,24 +95,22 @@ static int __init init(void)
         unsigned long size = (read_far) ? (8 << 20) : (16 << 10);
 
         if (mmio_address == 0) {
-                pr_err(MODULE_NAME ": you have to use the module argument "
-                                                        "mmio_address.\n");
-                pr_err(MODULE_NAME ": DO NOT LOAD THIS MODULE UNLESS"
-                                " YOU REALLY KNOW WHAT YOU ARE DOING!\n");
+                pr_err("you have to use the module argument mmio_address.\n");
+                pr_err("DO NOT LOAD THIS MODULE UNLESS YOU REALLY KNOW WHAT YOU ARE DOING!\n");
                 return -ENXIO;
         }
 
-        pr_warning(MODULE_NAME ": WARNING: mapping %lu kB @ 0x%08lx in PCI "
-                "address space, and writing 16 kB of rubbish in there.\n",
-                 size >> 10, mmio_address);
+        pr_warning("WARNING: mapping %lu kB @ 0x%08lx in PCI address space, "
+                   "and writing 16 kB of rubbish in there.\n",
+                   size >> 10, mmio_address);
         do_test(size);
-        pr_info(MODULE_NAME ": All done.\n");
+        pr_info("All done.\n");
         return 0;
 }
 
 static void __exit cleanup(void)
 {
-        pr_debug(MODULE_NAME ": unloaded.\n");
+        pr_debug("unloaded.\n");
 }
 
 module_init(init);