10 files changed, 56 insertions, 22 deletions

diff --git a/arch/x86/mm/gup.c b/arch/x86/mm/gup.c
index 71da1bca13cb..738e6593799d 100644
--- a/arch/x86/mm/gup.c
+++ b/arch/x86/mm/gup.c
@@ -18,7 +18,7 @@ static inline pte_t gup_get_pte(pte_t *ptep)
 #else
         /*
          * With get_user_pages_fast, we walk down the pagetables without taking
-         * any locks.  For this we would like to load the pointers atoimcally,
+         * any locks.  For this we would like to load the pointers atomically,
          * but that is not possible (without expensive cmpxchg8b) on PAE.  What
          * we do have is the guarantee that a pte will only either go from not
          * present to present, or present to not present or both -- it will not
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/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/kmemcheck/kmemcheck.c b/arch/x86/mm/kmemcheck/kmemcheck.c
index 8cc183344140..b3b531a4f8e5 100644
--- a/arch/x86/mm/kmemcheck/kmemcheck.c
+++ b/arch/x86/mm/kmemcheck/kmemcheck.c
@@ -337,7 +337,7 @@ bool kmemcheck_is_obj_initialized(unsigned long addr, size_t size)
         if (!shadow)
                 return true;
 
-        status = kmemcheck_shadow_test(shadow, size);
+        status = kmemcheck_shadow_test_all(shadow, size);
 
         return status == KMEMCHECK_SHADOW_INITIALIZED;
 }
diff --git a/arch/x86/mm/kmemcheck/shadow.c b/arch/x86/mm/kmemcheck/shadow.c
index 3f66b82076a3..aec124214d97 100644
--- a/arch/x86/mm/kmemcheck/shadow.c
+++ b/arch/x86/mm/kmemcheck/shadow.c
@@ -125,12 +125,12 @@ void kmemcheck_mark_initialized_pages(struct page *p, unsigned int n)
 
 enum kmemcheck_shadow kmemcheck_shadow_test(void *shadow, unsigned int size)
 {
+#ifdef CONFIG_KMEMCHECK_PARTIAL_OK
         uint8_t *x;
         unsigned int i;
 
         x = shadow;
 
-#ifdef CONFIG_KMEMCHECK_PARTIAL_OK
         /*
          * Make sure _some_ bytes are initialized. Gcc frequently generates
          * code to access neighboring bytes.
@@ -139,13 +139,25 @@ enum kmemcheck_shadow kmemcheck_shadow_test(void *shadow, unsigned int size)
                 if (x[i] == KMEMCHECK_SHADOW_INITIALIZED)
                         return x[i];
         }
+
+        return x[0];
 #else
+        return kmemcheck_shadow_test_all(shadow, size);
+#endif
+}
+
+enum kmemcheck_shadow kmemcheck_shadow_test_all(void *shadow, unsigned int size)
+{
+        uint8_t *x;
+        unsigned int i;
+
+        x = shadow;
+
         /* All bytes must be initialized. */
         for (i = 0; i < size; ++i) {
                 if (x[i] != KMEMCHECK_SHADOW_INITIALIZED)
                         return x[i];
         }
-#endif
 
         return x[0];
 }
diff --git a/arch/x86/mm/kmemcheck/shadow.h b/arch/x86/mm/kmemcheck/shadow.h
index af46d9ab9d86..ff0b2f70fbcb 100644
--- a/arch/x86/mm/kmemcheck/shadow.h
+++ b/arch/x86/mm/kmemcheck/shadow.h
@@ -11,6 +11,8 @@ enum kmemcheck_shadow {
 void *kmemcheck_shadow_lookup(unsigned long address);
 
 enum kmemcheck_shadow kmemcheck_shadow_test(void *shadow, unsigned int size);
+enum kmemcheck_shadow kmemcheck_shadow_test_all(void *shadow,
+                                                unsigned int size);
 void kmemcheck_shadow_set(void *shadow, unsigned int size);
 
 #endif
diff --git a/arch/x86/mm/kmmio.c b/arch/x86/mm/kmmio.c
index c0f6198565eb..536fb6823366 100644
--- a/arch/x86/mm/kmmio.c
+++ b/arch/x86/mm/kmmio.c
@@ -538,14 +538,15 @@ 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
                          */
-                        (*(unsigned long *)ERR_PTR(arg->err)) &= ~DR_STEP;
+                        *dr6_p &= ~DR_STEP;
                         return NOTIFY_STOP;
                 }
 
diff --git a/arch/x86/mm/mmap.c b/arch/x86/mm/mmap.c
index c8191defc38a..1dab5194fd9d 100644
--- a/arch/x86/mm/mmap.c
+++ b/arch/x86/mm/mmap.c
@@ -71,7 +71,7 @@ static int mmap_is_legacy(void)
         if (current->personality & ADDR_COMPAT_LAYOUT)
                 return 1;
 
-        if (current->signal->rlim[RLIMIT_STACK].rlim_cur == RLIM_INFINITY)
+        if (rlimit(RLIMIT_STACK) == RLIM_INFINITY)
                 return 1;
 
         return sysctl_legacy_va_layout;
@@ -96,7 +96,7 @@ static unsigned long mmap_rnd(void)
 
 static unsigned long mmap_base(void)
 {
-        unsigned long gap = current->signal->rlim[RLIMIT_STACK].rlim_cur;
+        unsigned long gap = rlimit(RLIMIT_STACK);
 
         if (gap < MIN_GAP)
                 gap = MIN_GAP;
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
index a27124185fc1..28c68762648f 100644
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -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 */