Merge commit '8700c95adb03' into timers/nohz

The full dynticks tree needs the latest RCU and sched
upstream updates in order to fix some dependencies.

Merge a common upstream merge point that has these
updates.

Conflicts:
	include/linux/perf_event.h
	kernel/rcutree.h
	kernel/rcutree_plugin.h

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>

5 files changed, 39 insertions, 29 deletions

diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c
index 80dab509dfb0..67c59ebec899 100644
--- a/arch/ia64/mm/contig.c
+++ b/arch/ia64/mm/contig.c
@@ -47,6 +47,8 @@ void show_mem(unsigned int filter)
 	printk(KERN_INFO "Mem-info:\n");
 	show_free_areas(filter);
 	printk(KERN_INFO "Node memory in pages:\n");
+	if (filter & SHOW_MEM_FILTER_PAGE_COUNT)
+		return;
 	for_each_online_pgdat(pgdat) {
 		unsigned long present;
 		unsigned long flags;
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index c2e955ee79a8..ae4db4bd6d97 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -623,6 +623,8 @@ void show_mem(unsigned int filter)
 
 	printk(KERN_INFO "Mem-info:\n");
 	show_free_areas(filter);
+	if (filter & SHOW_MEM_FILTER_PAGE_COUNT)
+		return;
 	printk(KERN_INFO "Node memory in pages:\n");
 	for_each_online_pgdat(pgdat) {
 		unsigned long present;
@@ -817,13 +819,12 @@ void arch_refresh_nodedata(int update_node, pg_data_t *update_pgdat)
 #endif
 
 #ifdef CONFIG_SPARSEMEM_VMEMMAP
-int __meminit vmemmap_populate(struct page *start_page,
-						unsigned long size, int node)
+int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node)
 {
-	return vmemmap_populate_basepages(start_page, size, node);
+	return vmemmap_populate_basepages(start, end, node);
 }
 
-void vmemmap_free(struct page *memmap, unsigned long nr_pages)
+void vmemmap_free(unsigned long start, unsigned long end)
 {
 }
 #endif
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 20bc967c7209..d1fe4b402601 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -154,25 +154,14 @@ ia64_init_addr_space (void)
 void
 free_initmem (void)
 {
-	unsigned long addr, eaddr;
-
-	addr = (unsigned long) ia64_imva(__init_begin);
-	eaddr = (unsigned long) ia64_imva(__init_end);
-	while (addr < eaddr) {
-		ClearPageReserved(virt_to_page(addr));
-		init_page_count(virt_to_page(addr));
-		free_page(addr);
-		++totalram_pages;
-		addr += PAGE_SIZE;
-	}
-	printk(KERN_INFO "Freeing unused kernel memory: %ldkB freed\n",
-	       (__init_end - __init_begin) >> 10);
+	free_reserved_area((unsigned long)ia64_imva(__init_begin),
+			   (unsigned long)ia64_imva(__init_end),
+			   0, "unused kernel");
 }
 
 void __init
 free_initrd_mem (unsigned long start, unsigned long end)
 {
-	struct page *page;
 	/*
 	 * EFI uses 4KB pages while the kernel can use 4KB or bigger.
 	 * Thus EFI and the kernel may have different page sizes. It is
@@ -213,11 +202,7 @@ free_initrd_mem (unsigned long start, unsigned long end)
 	for (; start < end; start += PAGE_SIZE) {
 		if (!virt_addr_valid(start))
 			continue;
-		page = virt_to_page(start);
-		ClearPageReserved(page);
-		init_page_count(page);
-		free_page(start);
-		++totalram_pages;
+		free_reserved_page(virt_to_page(start));
 	}
 }
 
diff --git a/arch/ia64/mm/ioremap.c b/arch/ia64/mm/ioremap.c
index 3dccdd8eb275..43964cde6214 100644
--- a/arch/ia64/mm/ioremap.c
+++ b/arch/ia64/mm/ioremap.c
@@ -16,7 +16,7 @@
 #include <asm/meminit.h>
 
 static inline void __iomem *
-__ioremap (unsigned long phys_addr)
+__ioremap_uc(unsigned long phys_addr)
 {
 	return (void __iomem *) (__IA64_UNCACHED_OFFSET | phys_addr);
 }
@@ -24,7 +24,11 @@ __ioremap (unsigned long phys_addr)
 void __iomem *
 early_ioremap (unsigned long phys_addr, unsigned long size)
 {
-	return __ioremap(phys_addr);
+	u64 attr;
+	attr = kern_mem_attribute(phys_addr, size);
+	if (attr & EFI_MEMORY_WB)
+		return (void __iomem *) phys_to_virt(phys_addr);
+	return __ioremap_uc(phys_addr);
 }
 
 void __iomem *
@@ -47,7 +51,7 @@ ioremap (unsigned long phys_addr, unsigned long size)
 	if (attr & EFI_MEMORY_WB)
 		return (void __iomem *) phys_to_virt(phys_addr);
 	else if (attr & EFI_MEMORY_UC)
-		return __ioremap(phys_addr);
+		return __ioremap_uc(phys_addr);
 
 	/*
 	 * Some chipsets don't support UC access to memory.  If
@@ -93,7 +97,7 @@ ioremap (unsigned long phys_addr, unsigned long size)
 		return (void __iomem *) (offset + (char __iomem *)addr);
 	}
 
-	return __ioremap(phys_addr);
+	return __ioremap_uc(phys_addr);
 }
 EXPORT_SYMBOL(ioremap);
 
@@ -103,7 +107,7 @@ ioremap_nocache (unsigned long phys_addr, unsigned long size)
 	if (kern_mem_attribute(phys_addr, size) & EFI_MEMORY_WB)
 		return NULL;
 
-	return __ioremap(phys_addr);
+	return __ioremap_uc(phys_addr);
 }
 EXPORT_SYMBOL(ioremap_nocache);
 
diff --git a/arch/ia64/mm/numa.c b/arch/ia64/mm/numa.c
index 3efea7d0a351..4248492b9321 100644
--- a/arch/ia64/mm/numa.c
+++ b/arch/ia64/mm/numa.c
@@ -61,18 +61,36 @@ paddr_to_nid(unsigned long paddr)
 int __meminit __early_pfn_to_nid(unsigned long pfn)
 {
 	int i, section = pfn >> PFN_SECTION_SHIFT, ssec, esec;
+	/*
+	 * NOTE: The following SMP-unsafe globals are only used early in boot
+	 * when the kernel is running single-threaded.
+	 */
+	static int __meminitdata last_ssec, last_esec;
+	static int __meminitdata last_nid;
+
+	if (section >= last_ssec && section < last_esec)
+		return last_nid;
 
 	for (i = 0; i < num_node_memblks; i++) {
 		ssec = node_memblk[i].start_paddr >> PA_SECTION_SHIFT;
 		esec = (node_memblk[i].start_paddr + node_memblk[i].size +
 			((1L << PA_SECTION_SHIFT) - 1)) >> PA_SECTION_SHIFT;
-		if (section >= ssec && section < esec)
+		if (section >= ssec && section < esec) {
+			last_ssec = ssec;
+			last_esec = esec;
+			last_nid = node_memblk[i].nid;
 			return node_memblk[i].nid;
+		}
 	}
 
 	return -1;
 }
 
+void __cpuinit numa_clear_node(int cpu)
+{
+	unmap_cpu_from_node(cpu, NUMA_NO_NODE);
+}
+
 #ifdef CONFIG_MEMORY_HOTPLUG
 /*
  *  SRAT information is stored in node_memblk[], then we can use SRAT