7 files changed, 42 insertions, 18 deletions

diff --git a/arch/x86/mm/gup.c b/arch/x86/mm/gup.c
index 71da1bca13c..738e6593799 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 c973f8e2a6c..9a0c258a86b 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 5198b9bb34e..69ddfbd9113 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 4901d0dafda..af3b6c8a436 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 c0f6198565e..536fb682336 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/srat_32.c b/arch/x86/mm/srat_32.c
index 6f8aa33031c..9324f13492d 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 d8907548966..28c68762648 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 */
@@ -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;