[PATCH] x86-64 update

Various fixes and cleanups for x86-64. 

 - Update defconfig
 - Fix some problems in ROM resource scanning (Rene Herman) 
 - Initialize APIC id of CPU 0 (Venkatesh Pallipadi)
 - Always enable swiotlb for GART_IOMMU
 - Fix compilation without IOMMU_GART
 - Remove nodes_present; use standard node_online_map instead.
   This also fixes a bug with no memory on node 0.
 - Switch node<->cpu mapping to arrays. This fixes some awkward
   special cases with no nodes and empty nodes. 
 - Move K8 fallback node setup to common code
 - Eliminate old fake_node.
 - Fix wrong fields in MCE handling (Marc Bevand)
 - Make pci_dma_consistent behave more similar to i386 to fix Alsa

arch/x86_64/Kconfig

@@ -290,9 +290,11 @@ config GART_IOMMU
 	  Normally the kernel will take the right choice by itself.
 	  If unsure say Y 
 
+# need this always enabled with GART_IOMMU for the VIA workaround
 config SWIOTLB
-       select GART_IOMMU
-       bool "Software IOTLB support"
+       bool
+       depends on GART_IOMMU
+       default y
 
 config DUMMY_IOMMU
 	bool

arch/x86_64/defconfig

@@ -24,8 +24,10 @@ CONFIG_STANDALONE=y
 #
 CONFIG_SWAP=y
 CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
 # CONFIG_BSD_PROCESS_ACCT is not set
 CONFIG_SYSCTL=y
+# CONFIG_AUDIT is not set
 CONFIG_LOG_BUF_SHIFT=18
 # CONFIG_HOTPLUG is not set
 CONFIG_IKCONFIG=y
@@ -37,6 +39,7 @@ CONFIG_EPOLL=y
 CONFIG_IOSCHED_NOOP=y
 CONFIG_IOSCHED_AS=y
 CONFIG_IOSCHED_DEADLINE=y
+CONFIG_IOSCHED_CFQ=y
 # CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
 
 #
@@ -83,7 +86,6 @@ CONFIG_X86_MCE=y
 #
 CONFIG_PM=y
 CONFIG_SOFTWARE_SUSPEND=y
-# CONFIG_PM_DISK is not set
 
 #
 # ACPI (Advanced Configuration and Power Interface) Support
@@ -107,7 +109,6 @@ CONFIG_ACPI_EC=y
 CONFIG_ACPI_POWER=y
 CONFIG_ACPI_PCI=y
 CONFIG_ACPI_SYSTEM=y
-# CONFIG_X86_PM_TIMER is not set
 
 #
 # CPU Frequency scaling
@@ -281,6 +282,8 @@ CONFIG_SCSI_SATA=y
 # CONFIG_SCSI_SATA_SVW is not set
 CONFIG_SCSI_ATA_PIIX=y
 # CONFIG_SCSI_SATA_PROMISE is not set
+# CONFIG_SCSI_SATA_SIL is not set
+# CONFIG_SCSI_SATA_SIS is not set
 CONFIG_SCSI_SATA_VIA=y
 # CONFIG_SCSI_SATA_VITESSE is not set
 # CONFIG_SCSI_BUSLOGIC is not set
@@ -350,7 +353,6 @@ CONFIG_IP_MULTICAST=y
 # CONFIG_NET_IPGRE is not set
 # CONFIG_IP_MROUTE is not set
 # CONFIG_ARPD is not set
-# CONFIG_INET_ECN is not set
 # CONFIG_SYN_COOKIES is not set
 # CONFIG_INET_AH is not set
 # CONFIG_INET_ESP is not set
@@ -368,7 +370,6 @@ CONFIG_IPV6=y
 #
 # SCTP Configuration (EXPERIMENTAL)
 #
-CONFIG_IPV6_SCTP__=y
 # CONFIG_IP_SCTP is not set
 # CONFIG_ATM is not set
 # CONFIG_VLAN_8021Q is not set
@@ -605,7 +606,7 @@ CONFIG_RTC=y
 #
 CONFIG_AGP=y
 CONFIG_AGP_AMD64=y
-CONFIG_AGP_INTEL=y
+# CONFIG_AGP_INTEL_MCH is not set
 # CONFIG_DRM is not set
 # CONFIG_MWAVE is not set
 CONFIG_RAW_DRIVER=y
@@ -691,6 +692,11 @@ CONFIG_SOUND_ICH=y
 #
 # CONFIG_USB_GADGET is not set
 
+#
+# Firmware Drivers
+#
+# CONFIG_EDD is not set
+
 #
 # File systems
 #
@@ -736,6 +742,7 @@ CONFIG_ISO9660_FS=y
 #
 CONFIG_PROC_FS=y
 CONFIG_PROC_KCORE=y
+CONFIG_SYSFS=y
 # CONFIG_DEVFS_FS is not set
 # CONFIG_DEVPTS_FS_XATTR is not set
 CONFIG_TMPFS=y

arch/x86_64/kernel/io_apic.c

@@ -250,12 +250,14 @@ void __init check_ioapic(void)
 				vendor &= 0xffff;
 				switch (vendor) { 
 				case PCI_VENDOR_ID_VIA:
+#ifdef CONFIG_GART_IOMMU
 					if (end_pfn >= (0xffffffff>>PAGE_SHIFT) &&
 					    !iommu_aperture_allowed) {
 						printk(KERN_INFO
     "Looks like a VIA chipset. Disabling IOMMU. Overwrite with \"iommu=allowed\"\n");
 						iommu_aperture_disabled = 1;
 					}
+#endif
 					/* FALL THROUGH */
 				case PCI_VENDOR_ID_NVIDIA:
 #ifndef CONFIG_SMP

arch/x86_64/kernel/mce.c

@@ -85,7 +85,7 @@ static void print_mce(struct mce *m)
 	if (m->addr)
 		printk("ADDR %Lx ", m->addr);
 	if (m->misc)
-		printk("MISC %Lx ", m->addr); 	
+		printk("MISC %Lx ", m->misc); 	
 	printk("\n");
 }
 
@@ -160,7 +160,7 @@ void do_machine_check(struct pt_regs * regs, long error_code)
 		if (m.status & MCI_STATUS_MISCV)
 			rdmsrl(MSR_IA32_MC0_MISC + i*4, m.misc);
 		if (m.status & MCI_STATUS_ADDRV)
-			rdmsrl(MSR_IA32_MC0_MISC + i*4, m.addr);
+			rdmsrl(MSR_IA32_MC0_ADDR + i*4, m.addr);
 
 		rdtscll(m.tsc);
 		wrmsrl(MSR_IA32_MC0_STATUS + i*4, 0);

arch/x86_64/kernel/pci-gart.c

@@ -607,9 +607,6 @@ int pci_dma_supported(struct pci_dev *dev, u64 mask)
 		return 0; 
 	}
 
-	if (no_iommu && (mask < (end_pfn << PAGE_SHIFT)) && !swiotlb)
-		return 0;
-
 	return 1;
 } 
 

arch/x86_64/kernel/setup.c

@@ -103,91 +103,115 @@ char command_line[COMMAND_LINE_SIZE];
 char saved_command_line[COMMAND_LINE_SIZE];
 
 struct resource standard_io_resources[] = {
-	{ "dma1", 0x00, 0x1f, IORESOURCE_BUSY },
-	{ "pic1", 0x20, 0x21, IORESOURCE_BUSY },
-	{ "timer", 0x40, 0x5f, IORESOURCE_BUSY },
-	{ "keyboard", 0x60, 0x6f, IORESOURCE_BUSY },
-	{ "dma page reg", 0x80, 0x8f, IORESOURCE_BUSY },
-	{ "pic2", 0xa0, 0xa1, IORESOURCE_BUSY },
-	{ "dma2", 0xc0, 0xdf, IORESOURCE_BUSY },
-	{ "fpu", 0xf0, 0xff, IORESOURCE_BUSY }
+	{ "dma1", 0x00, 0x1f, IORESOURCE_BUSY | IORESOURCE_IO },
+	{ "pic1", 0x20, 0x21, IORESOURCE_BUSY | IORESOURCE_IO },
+	{ "timer", 0x40, 0x5f, IORESOURCE_BUSY | IORESOURCE_IO },
+	{ "keyboard", 0x60, 0x6f, IORESOURCE_BUSY | IORESOURCE_IO },
+	{ "dma page reg", 0x80, 0x8f, IORESOURCE_BUSY | IORESOURCE_IO },
+	{ "pic2", 0xa0, 0xa1, IORESOURCE_BUSY | IORESOURCE_IO },
+	{ "dma2", 0xc0, 0xdf, IORESOURCE_BUSY | IORESOURCE_IO },
+	{ "fpu", 0xf0, 0xff, IORESOURCE_BUSY | IORESOURCE_IO }
 };
 
-#define STANDARD_IO_RESOURCES (sizeof(standard_io_resources)/sizeof(struct resource))
+#define STANDARD_IO_RESOURCES \
+	(sizeof standard_io_resources / sizeof standard_io_resources[0])
 
-struct resource code_resource = { "Kernel code", 0x100000, 0 };
-struct resource data_resource = { "Kernel data", 0, 0 };
-struct resource vram_resource = { "Video RAM area", 0xa0000, 0xbffff, IORESOURCE_BUSY };
+struct resource code_resource = { "Kernel code", 0x100000, 0, IORESOURCE_MEM };
+struct resource data_resource = { "Kernel data", 0, 0, IORESOURCE_MEM };
+struct resource vram_resource = { "Video RAM area", 0xa0000, 0xbffff, IORESOURCE_BUSY | IORESOURCE_MEM };
 
-/* System ROM resources */
-#define MAXROMS 6
-static struct resource rom_resources[MAXROMS] = {
-	{ "System ROM", 0xF0000, 0xFFFFF, IORESOURCE_BUSY },
-	{ "Video ROM", 0xc0000, 0xc7fff, IORESOURCE_BUSY }
+#define IORESOURCE_ROM (IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM)
+
+static struct resource system_rom_resource = { "System ROM", 0xf0000, 0xfffff, IORESOURCE_ROM };
+static struct resource extension_rom_resource = { "Extension ROM", 0xe0000, 0xeffff, IORESOURCE_ROM };
+
+static struct resource adapter_rom_resources[] = {
+	{ "Adapter ROM", 0xc8000, 0, IORESOURCE_ROM },
+	{ "Adapter ROM", 0, 0, IORESOURCE_ROM },
+	{ "Adapter ROM", 0, 0, IORESOURCE_ROM },
+	{ "Adapter ROM", 0, 0, IORESOURCE_ROM },
+	{ "Adapter ROM", 0, 0, IORESOURCE_ROM },
+	{ "Adapter ROM", 0, 0, IORESOURCE_ROM }
 };
 
+#define ADAPTER_ROM_RESOURCES \
+	(sizeof adapter_rom_resources / sizeof adapter_rom_resources[0])
+
+static struct resource video_rom_resource = { "Video ROM", 0xc0000, 0xc7fff, IORESOURCE_ROM };
+
 #define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
 
-static void __init probe_roms(void)
+static int __init checksum(unsigned char *rom, unsigned long length)
 {
-	int roms = 1;
-	unsigned long base;
-	unsigned char *romstart;
+	unsigned char *p, sum = 0;
 
-	request_resource(&iomem_resource, rom_resources+0);
+	for (p = rom; p < rom + length; p++)
+		sum += *p;
+	return sum == 0;
+}
 
-	/* Video ROM is standard at C000:0000 - C7FF:0000, check signature */
-	for (base = 0xC0000; base < 0xE0000; base += 2048) {
-		romstart = isa_bus_to_virt(base);
-		if (!romsignature(romstart))
+static void __init probe_roms(void)
+{
+	unsigned long start, length, upper;
+	unsigned char *rom;
+	int	      i;
+
+	/* video rom */
+	upper = adapter_rom_resources[0].start;
+	for (start = video_rom_resource.start; start < upper; start += 2048) {
+		rom = isa_bus_to_virt(start);
+		if (!romsignature(rom))
 			continue;
-		request_resource(&iomem_resource, rom_resources + roms);
-		roms++;
-		break;
-	}
 
-	/* Extension roms at C800:0000 - DFFF:0000 */
-	for (base = 0xC8000; base < 0xE0000; base += 2048) {
-		unsigned long length;
+		video_rom_resource.start = start;
 
-		romstart = isa_bus_to_virt(base);
-		if (!romsignature(romstart))
-			continue;
-		length = romstart[2] * 512;
-		if (length) {
-			unsigned int i;
-			unsigned char chksum;
-
-			chksum = 0;
-			for (i = 0; i < length; i++)
-				chksum += romstart[i];
-
-			/* Good checksum? */
-			if (!chksum) {
-				rom_resources[roms].start = base;
-				rom_resources[roms].end = base + length - 1;
-				rom_resources[roms].name = "Extension ROM";
-				rom_resources[roms].flags = IORESOURCE_BUSY;
-
-				request_resource(&iomem_resource, rom_resources + roms);
-				roms++;
-				if (roms >= MAXROMS)
-					return;
+		/* 0 < length <= 0x7f * 512, historically */
+		length = rom[2] * 512;
+
+		/* if checksum okay, trust length byte */
+		if (length && checksum(rom, length))
+			video_rom_resource.end = start + length - 1;
+
+		request_resource(&iomem_resource, &video_rom_resource);
+		break;
 			}
+
+	start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
+	if (start < upper)
+		start = upper;
+
+	/* system rom */
+	request_resource(&iomem_resource, &system_rom_resource);
+	upper = system_rom_resource.start;
+
+	/* check for extension rom (ignore length byte!) */
+	rom = isa_bus_to_virt(extension_rom_resource.start);
+	if (romsignature(rom)) {
+		length = extension_rom_resource.end - extension_rom_resource.start + 1;
+		if (checksum(rom, length)) {
+			request_resource(&iomem_resource, &extension_rom_resource);
+			upper = extension_rom_resource.start;
 		}
 	}
 
-	/* Final check for motherboard extension rom at E000:0000 */
-	base = 0xE0000;
-	romstart = isa_bus_to_virt(base);
+	/* check for adapter roms on 2k boundaries */
+	for (i = 0; i < ADAPTER_ROM_RESOURCES && start < upper; start += 2048) {
+		rom = isa_bus_to_virt(start);
+		if (!romsignature(rom))
+			continue;
+
+		/* 0 < length <= 0x7f * 512, historically */
+		length = rom[2] * 512;
+
+		/* but accept any length that fits if checksum okay */
+		if (!length || start + length > upper || !checksum(rom, length))
+			continue;
 
-	if (romsignature(romstart)) {
-		rom_resources[roms].start = base;
-		rom_resources[roms].end = base + 65535;
-		rom_resources[roms].name = "Extension ROM";
-		rom_resources[roms].flags = IORESOURCE_BUSY;
+		adapter_rom_resources[i].start = start;
+		adapter_rom_resources[i].end = start + length - 1;
+		request_resource(&iomem_resource, &adapter_rom_resources[i]);
 
-		request_resource(&iomem_resource, rom_resources + roms);
+		start = adapter_rom_resources[i++].end & ~2047UL;
 	}
 }
 

arch/x86_64/kernel/setup64.c

@@ -24,6 +24,7 @@
 #include <asm/mtrr.h>
 #include <asm/proto.h>
 #include <asm/mman.h>
+#include <asm/numa.h>
 
 char x86_boot_params[2048] __initdata = {0,};
 
@@ -329,4 +330,8 @@ void __init cpu_init (void)
 	set_debug(0UL, 7);
 
 	fpu_init(); 
+
+#ifdef CONFIG_NUMA
+	numa_add_cpu(cpu);
+#endif
 }

arch/x86_64/kernel/smpboot.c

@@ -811,6 +811,8 @@ static void __init smp_boot_cpus(unsigned int max_cpus)
 	if (GET_APIC_ID(apic_read(APIC_ID)) != boot_cpu_id)
 		BUG();
 
+	x86_cpu_to_apicid[0] = boot_cpu_id;
+
 	/*
 	 * Now scan the CPU present map and fire up the other CPUs.
 	 */

arch/x86_64/kernel/x8664_ksyms.c

@@ -208,13 +208,6 @@ EXPORT_SYMBOL(init_level4_pgt);
 extern unsigned long __supported_pte_mask;
 EXPORT_SYMBOL(__supported_pte_mask);
 
-#ifdef CONFIG_DISCONTIGMEM
-EXPORT_SYMBOL(memnode_shift);
-EXPORT_SYMBOL(memnodemap);
-EXPORT_SYMBOL(node_data);
-EXPORT_SYMBOL(fake_node);
-#endif
-
 EXPORT_SYMBOL(clear_page);
 
 #ifdef CONFIG_SMP

arch/x86_64/mm/k8topology.c

@@ -48,7 +48,6 @@ int __init k8_scan_nodes(unsigned long start, unsigned long end)
 	int nodeid, i, nb; 
 	int found = 0;
 	u32 reg;
-	int rr;
 
 	nb = find_northbridge(); 
 	if (nb < 0) 
@@ -91,7 +90,7 @@ int __init k8_scan_nodes(unsigned long start, unsigned long end)
 			       nodeid, (base>>8)&3, (limit>>8) & 3); 
 			return -1; 
 		}	
-		if ((1UL << nodeid) & nodes_present) { 
+		if (node_online(nodeid)) { 
 			printk(KERN_INFO "Node %d already present. Skipping\n", 
 			       nodeid);
 			continue;
@@ -152,28 +151,13 @@ int __init k8_scan_nodes(unsigned long start, unsigned long end)
 	printk(KERN_INFO "Using node hash shift of %d\n", memnode_shift); 
 
 	for (i = 0; i < MAXNODE; i++) { 
-		if (nodes[i].start != nodes[i].end)
+		if (nodes[i].start != nodes[i].end) { 
+			/* assume 1:1 NODE:CPU */
+			cpu_to_node[i] = i; 
 		setup_node_bootmem(i, nodes[i].start, nodes[i].end); 
 	} 
-
-	/* There are unfortunately some poorly designed mainboards around
-	   that only connect memory to a single CPU. This breaks the 1:1 cpu->node
-	   mapping. To avoid this fill in the mapping for all possible
-	   CPUs, as the number of CPUs is not known yet. 
-	   We round robin the existing nodes. */
-	rr = 0;
-	for (i = 0; i < MAXNODE; i++) {
-		if (nodes_present & (1UL<<i))
-			continue;
-		if ((nodes_present >> rr) == 0) 
-			rr = 0; 
-		rr = ffz(~nodes_present >> rr); 
-		node_data[i] = node_data[rr];
-		rr++; 
 	}
 
-	if (found == 1) 
-		fake_node = 1;
-
+	numa_init_array();
 	return 0;
 } 

arch/x86_64/mm/numa.c

@@ -9,6 +9,7 @@
 #include <linux/bootmem.h>
 #include <linux/mmzone.h>
 #include <linux/ctype.h>
+#include <linux/module.h>
 #include <asm/e820.h>
 #include <asm/proto.h>
 #include <asm/dma.h>
@@ -24,6 +25,9 @@ bootmem_data_t plat_node_bdata[MAX_NUMNODES];
 int memnode_shift;
 u8  memnodemap[NODEMAPSIZE];
 
+unsigned char cpu_to_node[NR_CPUS];  
+cpumask_t     node_to_cpumask[MAXNODE]; 
+
 static int numa_off __initdata; 
 
 unsigned long nodes_present; 
@@ -105,7 +109,6 @@ void __init setup_node_bootmem(int nodeid, unsigned long start, unsigned long en
 	reserve_bootmem_node(NODE_DATA(nodeid), bootmap_start, bootmap_pages<<PAGE_SHIFT);
 	if (nodeid + 1 > numnodes)
 		numnodes = nodeid + 1;
-	nodes_present |= (1UL << nodeid); 
 	node_set_online(nodeid);
 } 
 
@@ -136,13 +139,36 @@ void __init setup_node_zones(int nodeid)
 			    start_pfn, NULL); 
 } 
 
-int fake_node;
+void __init numa_init_array(void)
+{
+	int rr, i;
+	/* There are unfortunately some poorly designed mainboards around
+	   that only connect memory to a single CPU. This breaks the 1:1 cpu->node
+	   mapping. To avoid this fill in the mapping for all possible
+	   CPUs, as the number of CPUs is not known yet. 
+	   We round robin the existing nodes. */
+	rr = 0;
+	for (i = 0; i < MAXNODE; i++) {
+		if (node_online(i))
+			continue;
+		rr = find_next_bit(node_online_map, MAX_NUMNODES, rr);
+		if (rr == MAX_NUMNODES)
+			rr = find_first_bit(node_online_map, MAX_NUMNODES);
+		node_data[i] = node_data[rr];
+		cpu_to_node[i] = rr;
+		rr++; 
+	}
+
+	set_bit(0, &node_to_cpumask[cpu_to_node(0)]);
+}
 
-int __init numa_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
+void __init numa_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
 { 
+	int i;
+
 #ifdef CONFIG_K8_NUMA
 	if (!numa_off && !k8_scan_nodes(start_pfn<<PAGE_SHIFT, end_pfn<<PAGE_SHIFT))
-		return 0; 
+		return;
 #endif
 	printk(KERN_INFO "%s\n",
 	       numa_off ? "NUMA turned off" : "No NUMA configuration found");
@@ -151,12 +177,20 @@ int __init numa_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
 	       start_pfn << PAGE_SHIFT,
 	       end_pfn << PAGE_SHIFT); 
 		/* setup dummy node covering all memory */ 
-	fake_node = 1; 	
 	memnode_shift = 63; 
 	memnodemap[0] = 0;
 	numnodes = 1;
+	for (i = 0; i < NR_CPUS; i++)
+		cpu_to_node[i] = 0;
+	node_to_cpumask[0] = 1;
 	setup_node_bootmem(0, start_pfn<<PAGE_SHIFT, end_pfn<<PAGE_SHIFT);
-	return -1; 
+}
+
+__init void numa_add_cpu(int cpu)
+{
+	/* BP is initialized elsewhere */
+	if (cpu) 
+		set_bit(cpu, &node_to_cpumask[cpu_to_node(cpu)]);
 } 
 
 unsigned long __init numa_free_all_bootmem(void) 
@@ -185,4 +219,8 @@ __init int numa_setup(char *opt)
 	return 1;
 } 
 
-
+EXPORT_SYMBOL(cpu_to_node);
+EXPORT_SYMBOL(node_to_cpumask);
+EXPORT_SYMBOL(memnode_shift);
+EXPORT_SYMBOL(memnodemap);
+EXPORT_SYMBOL(node_data);

include/asm-x86_64/numa.h

@@ -9,12 +9,13 @@ struct node {
 };
 
 #define for_all_nodes(x) for ((x) = 0; (x) < numnodes; (x)++) \
-				if ((1UL << (x)) & nodes_present)
-
+				if (node_online(x))
 
 extern int compute_hash_shift(struct node *nodes);
-extern unsigned long nodes_present;
 
 #define ZONE_ALIGN (1UL << (MAX_ORDER+PAGE_SHIFT))
 
+extern void numa_add_cpu(int cpu);
+extern void numa_init_array(void);
+
 #endif

include/asm-x86_64/proto.h

@@ -42,7 +42,7 @@ extern void early_identify_cpu(struct cpuinfo_x86 *c);
 
 extern int k8_scan_nodes(unsigned long start, unsigned long end);
 
-extern int numa_initmem_init(unsigned long start_pfn, unsigned long end_pfn);
+extern void numa_initmem_init(unsigned long start_pfn, unsigned long end_pfn);
 extern unsigned long numa_free_all_bootmem(void);
 
 extern void reserve_bootmem_generic(unsigned long phys, unsigned len);

include/asm-x86_64/topology.h

@@ -6,18 +6,19 @@
 #ifdef CONFIG_DISCONTIGMEM
 
 #include <asm/mpspec.h>
+#include <asm/bitops.h>
 
 /* Map the K8 CPU local memory controllers to a simple 1:1 CPU:NODE topology */
 
-extern int fake_node;
-/* This is actually a cpumask_t, but doesn't matter because we don't have
-   >BITS_PER_LONG CPUs */
-extern unsigned long cpu_online_map;
+extern cpumask_t cpu_online_map;
 
-#define cpu_to_node(cpu)		(fake_node ? 0 : (cpu))
+extern unsigned char cpu_to_node[];
+extern cpumask_t     node_to_cpumask[];
+
+#define cpu_to_node(cpu)		(cpu_to_node[cpu])
 #define parent_node(node)		(node)
-#define node_to_first_cpu(node) 	(fake_node ? 0 : (node))
-#define node_to_cpumask(node)	(fake_node ? cpu_online_map : (1UL << (node)))
+#define node_to_first_cpu(node) 	(__ffs(node_to_cpumask[node]))
+#define node_to_cpumask(node)		(node_to_cpumask[node])
 
 static inline unsigned long pcibus_to_cpumask(int bus)
 {