Merge x86-64 update from Andi

author: Linus Torvalds <torvalds@g5.osdl.org> 2005-11-14 19:56:02 -0800
committer: Linus Torvalds <torvalds@g5.osdl.org> 2005-11-14 19:56:02 -0800
commit: 4060994c3e337b40e0f6fa8ce2cc178e021baf3d (patch)
tree: 980297c1747ca89354bc879cc5d17903eacb19e2 /arch/x86_64
parent: 0174f72f848dfe7dc7488799776303c81b181b16 (diff)
parent: d3ee871e63d0a0c70413dc0aa5534b8d6cd6ec37 (diff)
38 files changed, 1178 insertions, 663 deletions
diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig
index 4cce2f6f170..6ece645e4db 100644
--- a/arch/x86_64/Kconfig
+++ b/arch/x86_64/Kconfig
@@ -226,22 +226,42 @@ config SCHED_SMT
 
 source "kernel/Kconfig.preempt"
 
-config K8_NUMA
-       bool "K8 NUMA support"
-       select NUMA
+config NUMA
+       bool "Non Uniform Memory Access (NUMA) Support"
        depends on SMP
        help
-	  Enable NUMA (Non Unified Memory Architecture) support for
-	  AMD Opteron Multiprocessor systems. The kernel will try to allocate
-	  memory used by a CPU on the local memory controller of the CPU
-	  and add some more NUMA awareness to the kernel.
-	  This code is recommended on all multiprocessor Opteron systems
-	  and normally doesn't hurt on others.
+	 Enable NUMA (Non Uniform Memory Access) support. The kernel 
+	 will try to allocate memory used by a CPU on the local memory 
+	 controller of the CPU and add some more NUMA awareness to the kernel.
+	 This code is recommended on all multiprocessor Opteron systems.
+	 If the system is EM64T, you should say N unless your system is EM64T 
+	 NUMA. 
+
+config K8_NUMA
+       bool "Old style AMD Opteron NUMA detection"
+       depends on NUMA
+       default y
+       help
+	 Enable K8 NUMA node topology detection.  You should say Y here if
+	 you have a multi processor AMD K8 system. This uses an old
+	 method to read the NUMA configurtion directly from the builtin
+	 Northbridge of Opteron. It is recommended to use X86_64_ACPI_NUMA
+	 instead, which also takes priority if both are compiled in.   
+
+# Dummy CONFIG option to select ACPI_NUMA from drivers/acpi/Kconfig.
+
+config X86_64_ACPI_NUMA
+       bool "ACPI NUMA detection"
+       depends on NUMA
+       select ACPI 
+       select ACPI_NUMA
+       default y
+       help
+	 Enable ACPI SRAT based node topology detection.
 
 config NUMA_EMU
-	bool "NUMA emulation support"
-	select NUMA
-	depends on SMP
+	bool "NUMA emulation"
+	depends on NUMA
 	help
 	  Enable NUMA emulation. A flat machine will be split
 	  into virtual nodes when booted with "numa=fake=N", where N is the
@@ -252,9 +272,6 @@ config ARCH_DISCONTIGMEM_ENABLE
        depends on NUMA
        default y
 
-config NUMA
-       bool
-       default n
 
 config ARCH_DISCONTIGMEM_ENABLE
 	def_bool y
@@ -374,6 +391,14 @@ config X86_MCE_INTEL
 	   Additional support for intel specific MCE features such as
 	   the thermal monitor.
 
+config X86_MCE_AMD
+	bool "AMD MCE features"
+	depends on X86_MCE && X86_LOCAL_APIC
+	default y
+	help
+	   Additional support for AMD specific MCE features such as
+	   the DRAM Error Threshold.
+
 config PHYSICAL_START
 	hex "Physical address where the kernel is loaded" if EMBEDDED
 	default "0x100000"
@@ -502,7 +527,7 @@ config IA32_EMULATION
 	  left.
 
 config IA32_AOUT
-       bool "IA32 a.out support"
+       tristate "IA32 a.out support"
        depends on IA32_EMULATION
        help
          Support old a.out binaries in the 32bit emulation.
diff --git a/arch/x86_64/Kconfig.debug b/arch/x86_64/Kconfig.debug
index d584ecc27ea..e2c6e64a85e 100644
--- a/arch/x86_64/Kconfig.debug
+++ b/arch/x86_64/Kconfig.debug
@@ -2,15 +2,6 @@ menu "Kernel hacking"
 
 source "lib/Kconfig.debug"
 
-# !SMP for now because the context switch early causes GPF in segment reloading
-# and the GS base checking does the wrong thing then, causing a hang.
-config CHECKING
-	bool "Additional run-time checks"
-	depends on DEBUG_KERNEL && !SMP
-	help
-	  Enables some internal consistency checks for kernel debugging.
-	  You should normally say N.
-
 config INIT_DEBUG
 	bool "Debug __init statements"
 	depends on DEBUG_KERNEL
diff --git a/arch/x86_64/defconfig b/arch/x86_64/defconfig
index f8db7e500fb..5d56542fb68 100644
--- a/arch/x86_64/defconfig
+++ b/arch/x86_64/defconfig
@@ -1,7 +1,7 @@
 #
 # Automatically generated make config: don't edit
-# Linux kernel version: 2.6.13-git11
-# Mon Sep 12 16:16:16 2005
+# Linux kernel version: 2.6.14-git7
+# Sat Nov  5 15:55:50 2005
 #
 CONFIG_X86_64=y
 CONFIG_64BIT=y
@@ -35,7 +35,7 @@ CONFIG_POSIX_MQUEUE=y
 # CONFIG_BSD_PROCESS_ACCT is not set
 CONFIG_SYSCTL=y
 # CONFIG_AUDIT is not set
-# CONFIG_HOTPLUG is not set
+CONFIG_HOTPLUG=y
 CONFIG_KOBJECT_UEVENT=y
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
@@ -93,10 +93,11 @@ CONFIG_PREEMPT_NONE=y
 # CONFIG_PREEMPT_VOLUNTARY is not set
 # CONFIG_PREEMPT is not set
 CONFIG_PREEMPT_BKL=y
+CONFIG_NUMA=y
 CONFIG_K8_NUMA=y
+CONFIG_X86_64_ACPI_NUMA=y
 # CONFIG_NUMA_EMU is not set
 CONFIG_ARCH_DISCONTIGMEM_ENABLE=y
-CONFIG_NUMA=y
 CONFIG_ARCH_DISCONTIGMEM_DEFAULT=y
 CONFIG_ARCH_SPARSEMEM_ENABLE=y
 CONFIG_SELECT_MEMORY_MODEL=y
@@ -107,9 +108,10 @@ CONFIG_DISCONTIGMEM=y
 CONFIG_FLAT_NODE_MEM_MAP=y
 CONFIG_NEED_MULTIPLE_NODES=y
 # CONFIG_SPARSEMEM_STATIC is not set
+CONFIG_SPLIT_PTLOCK_CPUS=4
 CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID=y
-CONFIG_HAVE_DEC_LOCK=y
 CONFIG_NR_CPUS=32
+CONFIG_HOTPLUG_CPU=y
 CONFIG_HPET_TIMER=y
 CONFIG_X86_PM_TIMER=y
 CONFIG_HPET_EMULATE_RTC=y
@@ -117,6 +119,7 @@ CONFIG_GART_IOMMU=y
 CONFIG_SWIOTLB=y
 CONFIG_X86_MCE=y
 CONFIG_X86_MCE_INTEL=y
+CONFIG_X86_MCE_AMD=y
 CONFIG_PHYSICAL_START=0x100000
 # CONFIG_KEXEC is not set
 CONFIG_SECCOMP=y
@@ -136,11 +139,15 @@ CONFIG_PM=y
 # CONFIG_PM_DEBUG is not set
 CONFIG_SOFTWARE_SUSPEND=y
 CONFIG_PM_STD_PARTITION=""
+CONFIG_SUSPEND_SMP=y
 
 #
 # ACPI (Advanced Configuration and Power Interface) Support
 #
 CONFIG_ACPI=y
+CONFIG_ACPI_SLEEP=y
+CONFIG_ACPI_SLEEP_PROC_FS=y
+CONFIG_ACPI_SLEEP_PROC_SLEEP=y
 CONFIG_ACPI_AC=y
 CONFIG_ACPI_BATTERY=y
 CONFIG_ACPI_BUTTON=y
@@ -148,6 +155,7 @@ CONFIG_ACPI_BUTTON=y
 CONFIG_ACPI_HOTKEY=m
 CONFIG_ACPI_FAN=y
 CONFIG_ACPI_PROCESSOR=y
+CONFIG_ACPI_HOTPLUG_CPU=y
 CONFIG_ACPI_THERMAL=y
 CONFIG_ACPI_NUMA=y
 # CONFIG_ACPI_ASUS is not set
@@ -158,7 +166,7 @@ CONFIG_ACPI_BLACKLIST_YEAR=2001
 CONFIG_ACPI_EC=y
 CONFIG_ACPI_POWER=y
 CONFIG_ACPI_SYSTEM=y
-# CONFIG_ACPI_CONTAINER is not set
+CONFIG_ACPI_CONTAINER=y
 
 #
 # CPU Frequency scaling
@@ -293,7 +301,6 @@ CONFIG_IPV6=y
 # Network testing
 #
 # CONFIG_NET_PKTGEN is not set
-# CONFIG_NETFILTER_NETLINK is not set
 # CONFIG_HAMRADIO is not set
 # CONFIG_IRDA is not set
 # CONFIG_BT is not set
@@ -312,6 +319,11 @@ CONFIG_PREVENT_FIRMWARE_BUILD=y
 # CONFIG_DEBUG_DRIVER is not set
 
 #
+# Connector - unified userspace <-> kernelspace linker
+#
+# CONFIG_CONNECTOR is not set
+
+#
 # Memory Technology Devices (MTD)
 #
 # CONFIG_MTD is not set
@@ -354,6 +366,11 @@ CONFIG_IOSCHED_NOOP=y
 # CONFIG_IOSCHED_AS is not set
 CONFIG_IOSCHED_DEADLINE=y
 CONFIG_IOSCHED_CFQ=y
+# CONFIG_DEFAULT_AS is not set
+CONFIG_DEFAULT_DEADLINE=y
+# CONFIG_DEFAULT_CFQ is not set
+# CONFIG_DEFAULT_NOOP is not set
+CONFIG_DEFAULT_IOSCHED="cfq"
 # CONFIG_ATA_OVER_ETH is not set
 
 #
@@ -450,6 +467,7 @@ CONFIG_BLK_DEV_SD=y
 CONFIG_SCSI_SPI_ATTRS=y
 # CONFIG_SCSI_FC_ATTRS is not set
 # CONFIG_SCSI_ISCSI_ATTRS is not set
+# CONFIG_SCSI_SAS_ATTRS is not set
 
 #
 # SCSI low-level drivers
@@ -469,20 +487,24 @@ CONFIG_AIC79XX_DEBUG_MASK=0
 # CONFIG_AIC79XX_REG_PRETTY_PRINT is not set
 # CONFIG_MEGARAID_NEWGEN is not set
 # CONFIG_MEGARAID_LEGACY is not set
+# CONFIG_MEGARAID_SAS is not set
 CONFIG_SCSI_SATA=y
 # CONFIG_SCSI_SATA_AHCI is not set
 # CONFIG_SCSI_SATA_SVW is not set
 CONFIG_SCSI_ATA_PIIX=y
 # CONFIG_SCSI_SATA_MV is not set
-# CONFIG_SCSI_SATA_NV is not set
-# CONFIG_SCSI_SATA_PROMISE is not set
+CONFIG_SCSI_SATA_NV=y
+# CONFIG_SCSI_PDC_ADMA is not set
 # CONFIG_SCSI_SATA_QSTOR is not set
+# CONFIG_SCSI_SATA_PROMISE is not set
 # CONFIG_SCSI_SATA_SX4 is not set
 # CONFIG_SCSI_SATA_SIL is not set
+# CONFIG_SCSI_SATA_SIL24 is not set
 # CONFIG_SCSI_SATA_SIS is not set
 # CONFIG_SCSI_SATA_ULI is not set
 CONFIG_SCSI_SATA_VIA=y
 # CONFIG_SCSI_SATA_VITESSE is not set
+CONFIG_SCSI_SATA_INTEL_COMBINED=y
 # CONFIG_SCSI_BUSLOGIC is not set
 # CONFIG_SCSI_DMX3191D is not set
 # CONFIG_SCSI_EATA is not set
@@ -525,6 +547,7 @@ CONFIG_BLK_DEV_DM=y
 CONFIG_FUSION=y
 CONFIG_FUSION_SPI=y
 # CONFIG_FUSION_FC is not set
+# CONFIG_FUSION_SAS is not set
 CONFIG_FUSION_MAX_SGE=128
 # CONFIG_FUSION_CTL is not set
 
@@ -564,6 +587,7 @@ CONFIG_NET_ETHERNET=y
 CONFIG_MII=y
 # CONFIG_HAPPYMEAL is not set
 # CONFIG_SUNGEM is not set
+# CONFIG_CASSINI is not set
 CONFIG_NET_VENDOR_3COM=y
 CONFIG_VORTEX=y
 # CONFIG_TYPHOON is not set
@@ -740,7 +764,43 @@ CONFIG_LEGACY_PTY_COUNT=256
 #
 # Watchdog Cards
 #
-# CONFIG_WATCHDOG is not set
+CONFIG_WATCHDOG=y
+# CONFIG_WATCHDOG_NOWAYOUT is not set
+
+#
+# Watchdog Device Drivers
+#
+CONFIG_SOFT_WATCHDOG=y
+# CONFIG_ACQUIRE_WDT is not set
+# CONFIG_ADVANTECH_WDT is not set
+# CONFIG_ALIM1535_WDT is not set
+# CONFIG_ALIM7101_WDT is not set
+# CONFIG_SC520_WDT is not set
+# CONFIG_EUROTECH_WDT is not set
+# CONFIG_IB700_WDT is not set
+# CONFIG_IBMASR is not set
+# CONFIG_WAFER_WDT is not set
+# CONFIG_I6300ESB_WDT is not set
+# CONFIG_I8XX_TCO is not set
+# CONFIG_SC1200_WDT is not set
+# CONFIG_60XX_WDT is not set
+# CONFIG_SBC8360_WDT is not set
+# CONFIG_CPU5_WDT is not set
+# CONFIG_W83627HF_WDT is not set
+# CONFIG_W83877F_WDT is not set
+# CONFIG_W83977F_WDT is not set
+# CONFIG_MACHZ_WDT is not set
+
+#
+# PCI-based Watchdog Cards
+#
+# CONFIG_PCIPCWATCHDOG is not set
+# CONFIG_WDTPCI is not set
+
+#
+# USB-based Watchdog Cards
+#
+# CONFIG_USBPCWATCHDOG is not set
 CONFIG_HW_RANDOM=y
 # CONFIG_NVRAM is not set
 CONFIG_RTC=y
@@ -767,6 +827,7 @@ CONFIG_MAX_RAW_DEVS=256
 # TPM devices
 #
 # CONFIG_TCG_TPM is not set
+# CONFIG_TELCLOCK is not set
 
 #
 # I2C support
@@ -783,6 +844,7 @@ CONFIG_MAX_RAW_DEVS=256
 #
 CONFIG_HWMON=y
 # CONFIG_HWMON_VID is not set
+# CONFIG_SENSORS_HDAPS is not set
 # CONFIG_HWMON_DEBUG_CHIP is not set
 
 #
@@ -886,12 +948,15 @@ CONFIG_USB_UHCI_HCD=y
 # USB Device Class drivers
 #
 # CONFIG_OBSOLETE_OSS_USB_DRIVER is not set
-# CONFIG_USB_BLUETOOTH_TTY is not set
 # CONFIG_USB_ACM is not set
 CONFIG_USB_PRINTER=y
 
 #
-# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support' may also be needed; see USB_STORAGE Help for more information
+# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support'
+#
+
+#
+# may also be needed; see USB_STORAGE Help for more information
 #
 CONFIG_USB_STORAGE=y
 # CONFIG_USB_STORAGE_DEBUG is not set
@@ -924,6 +989,7 @@ CONFIG_USB_HIDINPUT=y
 # CONFIG_USB_XPAD is not set
 # CONFIG_USB_ATI_REMOTE is not set
 # CONFIG_USB_KEYSPAN_REMOTE is not set
+# CONFIG_USB_APPLETOUCH is not set
 
 #
 # USB Imaging devices
@@ -1005,7 +1071,7 @@ CONFIG_USB_MON=y
 #
 # CONFIG_EDD is not set
 # CONFIG_DELL_RBU is not set
-CONFIG_DCDBAS=m
+# CONFIG_DCDBAS is not set
 
 #
 # File systems
@@ -1037,7 +1103,7 @@ CONFIG_INOTIFY=y
 # CONFIG_QUOTA is not set
 CONFIG_DNOTIFY=y
 CONFIG_AUTOFS_FS=y
-# CONFIG_AUTOFS4_FS is not set
+CONFIG_AUTOFS4_FS=y
 # CONFIG_FUSE_FS is not set
 
 #
@@ -1068,7 +1134,7 @@ CONFIG_TMPFS=y
 CONFIG_HUGETLBFS=y
 CONFIG_HUGETLB_PAGE=y
 CONFIG_RAMFS=y
-# CONFIG_RELAYFS_FS is not set
+CONFIG_RELAYFS_FS=y
 
 #
 # Miscellaneous filesystems
@@ -1186,7 +1252,9 @@ CONFIG_DETECT_SOFTLOCKUP=y
 # CONFIG_DEBUG_KOBJECT is not set
 # CONFIG_DEBUG_INFO is not set
 CONFIG_DEBUG_FS=y
+# CONFIG_DEBUG_VM is not set
 # CONFIG_FRAME_POINTER is not set
+# CONFIG_RCU_TORTURE_TEST is not set
 CONFIG_INIT_DEBUG=y
 # CONFIG_IOMMU_DEBUG is not set
 CONFIG_KPROBES=y
diff --git a/arch/x86_64/ia32/ia32_aout.c b/arch/x86_64/ia32/ia32_aout.c
index 93c60f4aa47..3bf58af9893 100644
--- a/arch/x86_64/ia32/ia32_aout.c
+++ b/arch/x86_64/ia32/ia32_aout.c
@@ -36,9 +36,6 @@
 #undef WARN_OLD
 #undef CORE_DUMP /* probably broken */
 
-extern int ia32_setup_arg_pages(struct linux_binprm *bprm,
-				unsigned long stack_top, int exec_stack);
-
 static int load_aout_binary(struct linux_binprm *, struct pt_regs * regs);
 static int load_aout_library(struct file*);
 
diff --git a/arch/x86_64/ia32/ia32_binfmt.c b/arch/x86_64/ia32/ia32_binfmt.c
index d9161e39597..830feb272ec 100644
--- a/arch/x86_64/ia32/ia32_binfmt.c
+++ b/arch/x86_64/ia32/ia32_binfmt.c
@@ -335,7 +335,8 @@ static void elf32_init(struct pt_regs *regs)
 	me->thread.es = __USER_DS;
 }
 
-int setup_arg_pages(struct linux_binprm *bprm, unsigned long stack_top, int executable_stack)
+int ia32_setup_arg_pages(struct linux_binprm *bprm, unsigned long stack_top,
+			 int executable_stack)
 {
 	unsigned long stack_base;
 	struct vm_area_struct *mpnt;
@@ -389,6 +390,7 @@ int setup_arg_pages(struct linux_binprm *bprm, unsigned long stack_top, int exec
 	
 	return 0;
 }
+EXPORT_SYMBOL(ia32_setup_arg_pages);
 
 static unsigned long
 elf32_map (struct file *filep, unsigned long addr, struct elf_phdr *eppnt, int prot, int type)
diff --git a/arch/x86_64/kernel/Makefile b/arch/x86_64/kernel/Makefile
index 14328cab5d3..fe4cbd1c4b2 100644
--- a/arch/x86_64/kernel/Makefile
+++ b/arch/x86_64/kernel/Makefile
@@ -11,6 +11,7 @@ obj-y	:= process.o signal.o entry.o traps.o irq.o \
 
 obj-$(CONFIG_X86_MCE)         += mce.o
 obj-$(CONFIG_X86_MCE_INTEL)	+= mce_intel.o
+obj-$(CONFIG_X86_MCE_AMD)	+= mce_amd.o
 obj-$(CONFIG_MTRR)		+= ../../i386/kernel/cpu/mtrr/
 obj-$(CONFIG_ACPI)		+= acpi/
 obj-$(CONFIG_X86_MSR)		+= msr.o
diff --git a/arch/x86_64/kernel/aperture.c b/arch/x86_64/kernel/aperture.c
index 962ad4823b6..c7f4fdd20f0 100644
--- a/arch/x86_64/kernel/aperture.c
+++ b/arch/x86_64/kernel/aperture.c
@@ -196,7 +196,7 @@ static __u32 __init search_agp_bridge(u32 *order, int *valid_agp)
 void __init iommu_hole_init(void) 
 { 
 	int fix, num; 
-	u32 aper_size, aper_alloc = 0, aper_order, last_aper_order = 0;
+	u32 aper_size, aper_alloc = 0, aper_order = 0, last_aper_order = 0;
 	u64 aper_base, last_aper_base = 0;
 	int valid_agp = 0;
 
diff --git a/arch/x86_64/kernel/apic.c b/arch/x86_64/kernel/apic.c
index b6e7715d877..18691ce4c75 100644
--- a/arch/x86_64/kernel/apic.c
+++ b/arch/x86_64/kernel/apic.c
@@ -833,6 +833,16 @@ int setup_profiling_timer(unsigned int multiplier)
 	return 0;
 }
 
+#ifdef CONFIG_X86_MCE_AMD
+void setup_threshold_lvt(unsigned long lvt_off)
+{
+	unsigned int v = 0;
+	unsigned long reg = (lvt_off << 4) + 0x500;
+	v |= THRESHOLD_APIC_VECTOR;
+	apic_write(reg, v);
+}
+#endif /* CONFIG_X86_MCE_AMD */
+
 #undef APIC_DIVISOR
 
 /*
diff --git a/arch/x86_64/kernel/e820.c b/arch/x86_64/kernel/e820.c
index ab3f87aaff7..17579a1a174 100644
--- a/arch/x86_64/kernel/e820.c
+++ b/arch/x86_64/kernel/e820.c
@@ -23,8 +23,7 @@
 #include <asm/e820.h>
 #include <asm/proto.h>
 #include <asm/bootsetup.h>
-
-extern char _end[];
+#include <asm/sections.h>
 
 /* 
  * PFN of last memory page.
diff --git a/arch/x86_64/kernel/entry.S b/arch/x86_64/kernel/entry.S
index 7937971d185..9ff42041bb6 100644
--- a/arch/x86_64/kernel/entry.S
+++ b/arch/x86_64/kernel/entry.S
@@ -612,6 +612,9 @@ retint_kernel:
 ENTRY(thermal_interrupt)
 	apicinterrupt THERMAL_APIC_VECTOR,smp_thermal_interrupt
 
+ENTRY(threshold_interrupt)
+	apicinterrupt THRESHOLD_APIC_VECTOR,mce_threshold_interrupt
+
 #ifdef CONFIG_SMP	
 ENTRY(reschedule_interrupt)
 	apicinterrupt RESCHEDULE_VECTOR,smp_reschedule_interrupt
diff --git a/arch/x86_64/kernel/head.S b/arch/x86_64/kernel/head.S
index b92e5f45ed4..15290968e49 100644
--- a/arch/x86_64/kernel/head.S
+++ b/arch/x86_64/kernel/head.S
@@ -12,6 +12,7 @@
 
 #include <linux/linkage.h>
 #include <linux/threads.h>
+#include <linux/init.h>
 #include <asm/desc.h>
 #include <asm/segment.h>
 #include <asm/page.h>
@@ -70,7 +71,7 @@ startup_32:
 	movl	%eax, %cr4
 
 	/* Setup early boot stage 4 level pagetables */
-	movl	$(init_level4_pgt - __START_KERNEL_map), %eax
+	movl	$(boot_level4_pgt - __START_KERNEL_map), %eax
 	movl	%eax, %cr3
 
 	/* Setup EFER (Extended Feature Enable Register) */
@@ -113,7 +114,7 @@ startup_64:
 	movq	%rax, %cr4
 
 	/* Setup early boot stage 4 level pagetables. */
-	movq	$(init_level4_pgt - __START_KERNEL_map), %rax
+	movq	$(boot_level4_pgt - __START_KERNEL_map), %rax
 	movq	%rax, %cr3
 
 	/* Check if nx is implemented */
@@ -240,20 +241,10 @@ ljumpvector:
 ENTRY(stext)
 ENTRY(_stext)
 
-	/*
-	 * This default setting generates an ident mapping at address 0x100000
-	 * and a mapping for the kernel that precisely maps virtual address
-	 * 0xffffffff80000000 to physical address 0x000000. (always using
-	 * 2Mbyte large pages provided by PAE mode)
-	 */
 .org 0x1000
 ENTRY(init_level4_pgt)
-	.quad	0x0000000000002007 + __PHYSICAL_START	/* -> level3_ident_pgt */
-	.fill	255,8,0
-	.quad	0x000000000000a007 + __PHYSICAL_START
-	.fill	254,8,0
-	/* (2^48-(2*1024*1024*1024))/(2^39) = 511 */
-	.quad	0x0000000000003007 + __PHYSICAL_START	/* -> level3_kernel_pgt */
+	/* This gets initialized in x86_64_start_kernel */
+	.fill	512,8,0
 
 .org 0x2000
 ENTRY(level3_ident_pgt)
@@ -350,6 +341,24 @@ ENTRY(wakeup_level4_pgt)
 	.quad	0x0000000000003007 + __PHYSICAL_START	/* -> level3_kernel_pgt */
 #endif
 
+#ifndef CONFIG_HOTPLUG_CPU
+	__INITDATA
+#endif
+	/*
+	 * This default setting generates an ident mapping at address 0x100000
+	 * and a mapping for the kernel that precisely maps virtual address
+	 * 0xffffffff80000000 to physical address 0x000000. (always using
+	 * 2Mbyte large pages provided by PAE mode)
+	 */
+	.align PAGE_SIZE
+ENTRY(boot_level4_pgt)
+	.quad	0x0000000000002007 + __PHYSICAL_START	/* -> level3_ident_pgt */
+	.fill	255,8,0
+	.quad	0x000000000000a007 + __PHYSICAL_START
+	.fill	254,8,0
+	/* (2^48-(2*1024*1024*1024))/(2^39) = 511 */
+	.quad	0x0000000000003007 + __PHYSICAL_START	/* -> level3_kernel_pgt */
+
 	.data
 
 	.align 16
diff --git a/arch/x86_64/kernel/head64.c b/arch/x86_64/kernel/head64.c
index cf6ab147a2a..b675c5add01 100644
--- a/arch/x86_64/kernel/head64.c
+++ b/arch/x86_64/kernel/head64.c
@@ -19,14 +19,15 @@
 #include <asm/bootsetup.h>
 #include <asm/setup.h>
 #include <asm/desc.h>
+#include <asm/pgtable.h>
+#include <asm/sections.h>
 
 /* Don't add a printk in there. printk relies on the PDA which is not initialized 
    yet. */
 static void __init clear_bss(void)
 {
-	extern char __bss_start[], __bss_end[];
 	memset(__bss_start, 0,
-	       (unsigned long) __bss_end - (unsigned long) __bss_start);
+	       (unsigned long) __bss_stop - (unsigned long) __bss_start);
 }
 
 #define NEW_CL_POINTER		0x228	/* Relative to real mode data */
@@ -75,8 +76,6 @@ static void __init setup_boot_cpu_data(void)
 	boot_cpu_data.x86_mask = eax & 0xf;
 }
 
-extern char _end[];
-
 void __init x86_64_start_kernel(char * real_mode_data)
 {
 	char *s;
@@ -86,6 +85,13 @@ void __init x86_64_start_kernel(char * real_mode_data)
 		set_intr_gate(i, early_idt_handler);
 	asm volatile("lidt %0" :: "m" (idt_descr));
 	clear_bss();
+
+	/*
+	 * switch to init_level4_pgt from boot_level4_pgt
+	 */
+	memcpy(init_level4_pgt, boot_level4_pgt, PTRS_PER_PGD*sizeof(pgd_t));
+	asm volatile("movq %0,%%cr3" :: "r" (__pa_symbol(&init_level4_pgt)));
+
 	pda_init(0);
 	copy_bootdata(real_mode_data);
 #ifdef CONFIG_SMP
diff --git a/arch/x86_64/kernel/i8259.c b/arch/x86_64/kernel/i8259.c
index a9368d4c4ab..6e5101ad3d1 100644
--- a/arch/x86_64/kernel/i8259.c
+++ b/arch/x86_64/kernel/i8259.c
@@ -492,6 +492,7 @@ void invalidate_interrupt5(void);
 void invalidate_interrupt6(void);
 void invalidate_interrupt7(void);
 void thermal_interrupt(void);
+void threshold_interrupt(void);
 void i8254_timer_resume(void);
 
 static void setup_timer_hardware(void)
@@ -580,6 +581,7 @@ void __init init_IRQ(void)
 	set_intr_gate(CALL_FUNCTION_VECTOR, call_function_interrupt);
 #endif	
 	set_intr_gate(THERMAL_APIC_VECTOR, thermal_interrupt);
+	set_intr_gate(THRESHOLD_APIC_VECTOR, threshold_interrupt);
 
 #ifdef CONFIG_X86_LOCAL_APIC
 	/* self generated IPI for local APIC timer */
diff --git a/arch/x86_64/kernel/io_apic.c b/arch/x86_64/kernel/io_apic.c
index c8eee20cd51..97154ab058b 100644
--- a/arch/x86_64/kernel/io_apic.c
+++ b/arch/x86_64/kernel/io_apic.c
@@ -57,7 +57,7 @@ int nr_ioapic_registers[MAX_IO_APICS];
  * Rough estimation of how many shared IRQs there are, can
  * be changed anytime.
  */
-#define MAX_PLUS_SHARED_IRQS NR_IRQS
+#define MAX_PLUS_SHARED_IRQS NR_IRQ_VECTORS
 #define PIN_MAP_SIZE (MAX_PLUS_SHARED_IRQS + NR_IRQS)
 
 /*
@@ -85,6 +85,7 @@ int vector_irq[NR_VECTORS] __read_mostly = { [0 ... NR_VECTORS - 1] = -1};
 	int pin;							\
 	struct irq_pin_list *entry = irq_2_pin + irq;			\
 									\
+	BUG_ON(irq >= NR_IRQS);						\
 	for (;;) {							\
 		unsigned int reg;					\
 		pin = entry->pin;					\
@@ -127,6 +128,8 @@ static void set_ioapic_affinity_irq(unsigned int irq, cpumask_t mask)
 }
 #endif
 
+static u8 gsi_2_irq[NR_IRQ_VECTORS] = { [0 ... NR_IRQ_VECTORS-1] = 0xFF };
+
 /*
  * The common case is 1:1 IRQ<->pin mappings. Sometimes there are
  * shared ISA-space IRQs, so we have to support them. We are super
@@ -137,6 +140,7 @@ static void add_pin_to_irq(unsigned int irq, int apic, int pin)
 	static int first_free_entry = NR_IRQS;
 	struct irq_pin_list *entry = irq_2_pin + irq;
 
+	BUG_ON(irq >= NR_IRQS);
 	while (entry->next)
 		entry = irq_2_pin + entry->next;
 
@@ -144,7 +148,7 @@ static void add_pin_to_irq(unsigned int irq, int apic, int pin)
 		entry->next = first_free_entry;
 		entry = irq_2_pin + entry->next;
 		if (++first_free_entry >= PIN_MAP_SIZE)
-			panic("io_apic.c: whoops");
+			panic("io_apic.c: ran out of irq_2_pin entries!");
 	}
 	entry->apic = apic;
 	entry->pin = pin;
@@ -420,6 +424,7 @@ int IO_APIC_get_PCI_irq_vector(int bus, int slot, int pin)
 				best_guess = irq;
 		}
 	}
+	BUG_ON(best_guess >= NR_IRQS);
 	return best_guess;
 }
 
@@ -610,6 +615,64 @@ static inline int irq_trigger(int idx)
 	return MPBIOS_trigger(idx);
 }
 
+static int next_irq = 16;
+
+/*
+ * gsi_irq_sharing -- Name overload!  "irq" can be either a legacy IRQ
+ * in the range 0-15, a linux IRQ in the range 0-223, or a GSI number
+ * from ACPI, which can reach 800 in large boxen.
+ *
+ * Compact the sparse GSI space into a sequential IRQ series and reuse
+ * vectors if possible.
+ */
+int gsi_irq_sharing(int gsi)
+{
+	int i, tries, vector;
+
+	BUG_ON(gsi >= NR_IRQ_VECTORS);
+
+	if (platform_legacy_irq(gsi))
+		return gsi;
+
+	if (gsi_2_irq[gsi] != 0xFF)
+		return (int)gsi_2_irq[gsi];
+
+	tries = NR_IRQS;
+  try_again:
+	vector = assign_irq_vector(gsi);
+
+	/*
+	 * Sharing vectors means sharing IRQs, so scan irq_vectors for previous
+	 * use of vector and if found, return that IRQ.  However, we never want
+	 * to share legacy IRQs, which usually have a different trigger mode
+	 * than PCI.
+	 */
+	for (i = 0; i < NR_IRQS; i++)
+		if (IO_APIC_VECTOR(i) == vector)
+			break;
+	if (platform_legacy_irq(i)) {
+		if (--tries >= 0) {
+			IO_APIC_VECTOR(i) = 0;
+			goto try_again;
+		}
+		panic("gsi_irq_sharing: didn't find an IRQ using vector 0x%02X for GSI %d", vector, gsi);
+	}
+	if (i < NR_IRQS) {
+		gsi_2_irq[gsi] = i;
+		printk(KERN_INFO "GSI %d sharing vector 0x%02X and IRQ %d\n",
+				gsi, vector, i);
+		return i;
+	}
+
+	i = next_irq++;
+	BUG_ON(i >= NR_IRQS);
+	gsi_2_irq[gsi] = i;
+	IO_APIC_VECTOR(i) = vector;
+	printk(KERN_INFO "GSI %d assigned vector 0x%02X and IRQ %d\n",
+			gsi, vector, i);
+	return i;
+}
+
 static int pin_2_irq(int idx, int apic, int pin)
 {
 	int irq, i;
@@ -639,6 +702,7 @@ static int pin_2_irq(int idx, int apic, int pin)
 			while (i < apic)
 				irq += nr_ioapic_registers[i++];
 			irq += pin;
+			irq = gsi_irq_sharing(irq);
 			break;
 		}
 		default:
@@ -648,6 +712,7 @@ static int pin_2_irq(int idx, int apic, int pin)
 			break;
 		}
 	}
+	BUG_ON(irq >= NR_IRQS);
 
 	/*
 	 * PCI IRQ command line redirection. Yes, limits are hardcoded.
@@ -663,6 +728,7 @@ static int pin_2_irq(int idx, int apic, int pin)
 			}
 		}
 	}
+	BUG_ON(irq >= NR_IRQS);
 	return irq;
 }
 
@@ -690,8 +756,8 @@ int assign_irq_vector(int irq)
 {
 	static int current_vector = FIRST_DEVICE_VECTOR, offset = 0;
 
-	BUG_ON(irq >= NR_IRQ_VECTORS);
-	if (IO_APIC_VECTOR(irq) > 0)
+	BUG_ON(irq != AUTO_ASSIGN && (unsigned)irq >= NR_IRQ_VECTORS);
+	if (irq != AUTO_ASSIGN && IO_APIC_VECTOR(irq) > 0)
 		return IO_APIC_VECTOR(irq);
 next:
 	current_vector += 8;
@@ -699,9 +765,8 @@ next:
 		goto next;
 
 	if (current_vector >= FIRST_SYSTEM_VECTOR) {
-		offset++;
-		if (!(offset%8))
-			return -ENOSPC;
+		/* If we run out of vectors on large boxen, must share them. */
+		offset = (offset + 1) % 8;
 		current_vector = FIRST_DEVICE_VECTOR + offset;
 	}
 
@@ -1917,6 +1982,7 @@ int io_apic_set_pci_routing (int ioapic, int pin, int irq, int edge_level, int a
 	entry.polarity = active_high_low;
 	entry.mask = 1;					 /* Disabled (masked) */
 
+	irq = gsi_irq_sharing(irq);
 	/*
 	 * IRQs < 16 are already in the irq_2_pin[] map
 	 */
diff --git a/arch/x86_64/kernel/mce.c b/arch/x86_64/kernel/mce.c
index 69541db5ff2..183dc610542 100644
--- a/arch/x86_64/kernel/mce.c
+++ b/arch/x86_64/kernel/mce.c
@@ -37,7 +37,7 @@ static unsigned long bank[NR_BANKS] = { [0 ... NR_BANKS-1] = ~0UL };
 static unsigned long console_logged;
 static int notify_user;
 static int rip_msr;
-static int mce_bootlog;
+static int mce_bootlog = 1;
 
 /*
  * Lockless MCE logging infrastructure.
@@ -347,7 +347,11 @@ static void __cpuinit mce_cpu_quirks(struct cpuinfo_x86 *c)
 		/* disable GART TBL walk error reporting, which trips off 
 		   incorrectly with the IOMMU & 3ware & Cerberus. */
 		clear_bit(10, &bank[4]);
+		/* Lots of broken BIOS around that don't clear them
+		   by default and leave crap in there. Don't log. */
+		mce_bootlog = 0;
 	}
+
 }			
 
 static void __cpuinit mce_cpu_features(struct cpuinfo_x86 *c)
@@ -356,6 +360,9 @@ static void __cpuinit mce_cpu_features(struct cpuinfo_x86 *c)
 	case X86_VENDOR_INTEL:
 		mce_intel_feature_init(c);
 		break;
+	case X86_VENDOR_AMD:
+		mce_amd_feature_init(c);
+		break;
 	default:
 		break;
 	}
@@ -495,16 +502,16 @@ static int __init mcheck_disable(char *str)
 /* mce=off disables machine check. Note you can reenable it later
    using sysfs.
    mce=TOLERANCELEVEL (number, see above)
-   mce=bootlog Log MCEs from before booting. Disabled by default to work
-   around buggy BIOS that leave bogus MCEs.  */
+   mce=bootlog Log MCEs from before booting. Disabled by default on AMD.
+   mce=nobootlog Don't log MCEs from before booting. */
 static int __init mcheck_enable(char *str)
 {
 	if (*str == '=')
 		str++;
 	if (!strcmp(str, "off"))
 		mce_dont_init = 1;
-	else if (!strcmp(str, "bootlog"))
-		mce_bootlog = 1;
+	else if (!strcmp(str, "bootlog") || !strcmp(str,"nobootlog"))
+		mce_bootlog = str[0] == 'b';
 	else if (isdigit(str[0]))
 		get_option(&str, &tolerant);
 	else
diff --git a/arch/x86_64/kernel/mce_amd.c b/arch/x86_64/kernel/mce_amd.c
new file mode 100644
index 00000000000..1f76175ace0
--- /dev/null
+++ b/arch/x86_64/kernel/mce_amd.c
@@ -0,0 +1,538 @@
+/*
+ *  (c) 2005 Advanced Micro Devices, Inc.
+ *  Your use of this code is subject to the terms and conditions of the
+ *  GNU general public license version 2. See "COPYING" or
+ *  http://www.gnu.org/licenses/gpl.html
+ *
+ *  Written by Jacob Shin - AMD, Inc.
+ *
+ *  Support : jacob.shin@amd.com
+ *
+ *  MC4_MISC0 DRAM ECC Error Threshold available under AMD K8 Rev F.
+ *  MC4_MISC0 exists per physical processor.
+ *
+ */
+
+#include <linux/cpu.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kobject.h>
+#include <linux/notifier.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/sysdev.h>
+#include <linux/sysfs.h>
+#include <asm/apic.h>
+#include <asm/mce.h>
+#include <asm/msr.h>
+#include <asm/percpu.h>
+
+#define PFX "mce_threshold: "
+#define VERSION "version 1.00.9"
+#define NR_BANKS 5
+#define THRESHOLD_MAX 0xFFF
+#define INT_TYPE_APIC 0x00020000
+#define MASK_VALID_HI 0x80000000
+#define MASK_LVTOFF_HI 0x00F00000
+#define MASK_COUNT_EN_HI 0x00080000
+#define MASK_INT_TYPE_HI 0x00060000
+#define MASK_OVERFLOW_HI 0x00010000
+#define MASK_ERR_COUNT_HI 0x00000FFF
+#define MASK_OVERFLOW 0x0001000000000000L
+
+struct threshold_bank {
+	unsigned int cpu;
+	u8 bank;
+	u8 interrupt_enable;
+	u16 threshold_limit;
+	struct kobject kobj;
+};
+
+static struct threshold_bank threshold_defaults = {
+	.interrupt_enable = 0,
+	.threshold_limit = THRESHOLD_MAX,
+};
+
+#ifdef CONFIG_SMP
+static unsigned char shared_bank[NR_BANKS] = {
+	0, 0, 0, 0, 1
+};
+#endif
+
+static DEFINE_PER_CPU(unsigned char, bank_map);	/* see which banks are on */
+
+/*
+ * CPU Initialization
+ */
+
+/* must be called with correct cpu affinity */
+static void threshold_restart_bank(struct threshold_bank *b,
+				   int reset, u16 old_limit)
+{
+	u32 mci_misc_hi, mci_misc_lo;
+
+	rdmsr(MSR_IA32_MC0_MISC + b->bank * 4, mci_misc_lo, mci_misc_hi);
+
+	if (b->threshold_limit < (mci_misc_hi & THRESHOLD_MAX))
+		reset = 1;	/* limit cannot be lower than err count */
+
+	if (reset) {		/* reset err count and overflow bit */
+		mci_misc_hi =
+		    (mci_misc_hi & ~(MASK_ERR_COUNT_HI | MASK_OVERFLOW_HI)) |
+		    (THRESHOLD_MAX - b->threshold_limit);
+	} else if (old_limit) {	/* change limit w/o reset */
+		int new_count = (mci_misc_hi & THRESHOLD_MAX) +
+		    (old_limit - b->threshold_limit);
+		mci_misc_hi = (mci_misc_hi & ~MASK_ERR_COUNT_HI) |
+		    (new_count & THRESHOLD_MAX);
+	}
+
+	b->interrupt_enable ?
+	    (mci_misc_hi = (mci_misc_hi & ~MASK_INT_TYPE_HI) | INT_TYPE_APIC) :
+	    (mci_misc_hi &= ~MASK_INT_TYPE_HI);
+
+	mci_misc_hi |= MASK_COUNT_EN_HI;
+	wrmsr(MSR_IA32_MC0_MISC + b->bank * 4, mci_misc_lo, mci_misc_hi);
+}
+
+void __cpuinit mce_amd_feature_init(struct cpuinfo_x86 *c)
+{
+	int bank;
+	u32 mci_misc_lo, mci_misc_hi;
+	unsigned int cpu = smp_processor_id();
+
+	for (bank = 0; bank < NR_BANKS; ++bank) {
+		rdmsr(MSR_IA32_MC0_MISC + bank * 4, mci_misc_lo, mci_misc_hi);
+
+		/* !valid, !counter present, bios locked */
+		if (!(mci_misc_hi & MASK_VALID_HI) ||
+		    !(mci_misc_hi & MASK_VALID_HI >> 1) ||
+		    (mci_misc_hi & MASK_VALID_HI >> 2))
+			continue;
+
+		per_cpu(bank_map, cpu) |= (1 << bank);
+
+#ifdef CONFIG_SMP
+		if (shared_bank[bank] && cpu_core_id[cpu])
+			continue;
+#endif
+
+		setup_threshold_lvt((mci_misc_hi & MASK_LVTOFF_HI) >> 20);
+		threshold_defaults.cpu = cpu;
+		threshold_defaults.bank = bank;
+		threshold_restart_bank(&threshold_defaults, 0, 0);
+	}
+}
+
+/*
+ * APIC Interrupt Handler
+ */
+
+/*
+ * threshold interrupt handler will service THRESHOLD_APIC_VECTOR.
+ * the interrupt goes off when error_count reaches threshold_limit.
+ * the handler will simply log mcelog w/ software defined bank number.
+ */
+asmlinkage void mce_threshold_interrupt(void)
+{
+	int bank;
+	struct mce m;
+
+	ack_APIC_irq();
+	irq_enter();
+
+	memset(&m, 0, sizeof(m));
+	rdtscll(m.tsc);
+	m.cpu = smp_processor_id();
+
+	/* assume first bank caused it */
+	for (bank = 0; bank < NR_BANKS; ++bank) {
+		m.bank = MCE_THRESHOLD_BASE + bank;
+		rdmsrl(MSR_IA32_MC0_MISC + bank * 4, m.misc);
+
+		if (m.misc & MASK_OVERFLOW) {
+			mce_log(&m);
+			goto out;
+		}
+	}
+      out:
+	irq_exit();
+}
+
+/*
+ * Sysfs Interface
+ */
+
+static struct sysdev_class threshold_sysclass = {
+	set_kset_name("threshold"),
+};
+
+static DEFINE_PER_CPU(struct sys_device, device_threshold);
+
+struct threshold_attr {
+        struct attribute attr;
+        ssize_t(*show) (struct threshold_bank *, char *);
+        ssize_t(*store) (struct threshold_bank *, const char *, size_t count);
+};
+
+static DEFINE_PER_CPU(struct threshold_bank *, threshold_banks[NR_BANKS]);
+
+static cpumask_t affinity_set(unsigned int cpu)
+{
+	cpumask_t oldmask = current->cpus_allowed;
+	cpumask_t newmask = CPU_MASK_NONE;
+	cpu_set(cpu, newmask);
+	set_cpus_allowed(current, newmask);
+	return oldmask;
+}
+
+static void affinity_restore(cpumask_t oldmask)
+{
+	set_cpus_allowed(current, oldmask);
+}
+
+#define SHOW_FIELDS(name) \
+        static ssize_t show_ ## name(struct threshold_bank * b, char *buf) \
+        { \
+                return sprintf(buf, "%lx\n", (unsigned long) b->name); \
+        }
+SHOW_FIELDS(interrupt_enable)
+SHOW_FIELDS(threshold_limit)
+
+static ssize_t store_interrupt_enable(struct threshold_bank *b,
+				      const char *buf, size_t count)
+{
+	char *end;
+	cpumask_t oldmask;
+	unsigned long new = simple_strtoul(buf, &end, 0);
+	if (end == buf)
+		return -EINVAL;
+	b->interrupt_enable = !!new;
+
+	oldmask = affinity_set(b->cpu);
+	threshold_restart_bank(b, 0, 0);
+	affinity_restore(oldmask);
+
+	return end - buf;
+}
+
+static ssize_t store_threshold_limit(struct threshold_bank *b,
+				     const char *buf, size_t count)
+{
+	char *end;
+	cpumask_t oldmask;
+	u16 old;
+	unsigned long new = simple_strtoul(buf, &end, 0);
+	if (end == buf)
+		return -EINVAL;
+	if (new > THRESHOLD_MAX)
+		new = THRESHOLD_MAX;
+	if (new < 1)
+		new = 1;
+	old = b->threshold_limit;
+	b->threshold_limit = new;
+
+	oldmask = affinity_set(b->cpu);
+	threshold_restart_bank(b, 0, old);
+	affinity_restore(oldmask);
+
+	return end - buf;
+}
+
+static ssize_t show_error_count(struct threshold_bank *b, char *buf)
+{
+	u32 high, low;
+	cpumask_t oldmask;
+	oldmask = affinity_set(b->cpu);
+	rdmsr(MSR_IA32_MC0_MISC + b->bank * 4, low, high); /* ignore low 32 */
+	affinity_restore(oldmask);
+	return sprintf(buf, "%x\n",
+		       (high & 0xFFF) - (THRESHOLD_MAX - b->threshold_limit));
+}
+
+static ssize_t store_error_count(struct threshold_bank *b,
+				 const char *buf, size_t count)
+{
+	cpumask_t oldmask;
+	oldmask = affinity_set(b->cpu);
+	threshold_restart_bank(b, 1, 0);
+	affinity_restore(oldmask);
+	return 1;
+}
+
+#define THRESHOLD_ATTR(_name,_mode,_show,_store) {            \
+        .attr = {.name = __stringify(_name), .mode = _mode }, \
+        .show = _show,                                        \
+        .store = _store,                                      \
+};
+
+#define ATTR_FIELDS(name) \
+        static struct threshold_attr name = \
+        THRESHOLD_ATTR(name, 0644, show_## name, store_## name)
+
+ATTR_FIELDS(interrupt_enable);
+ATTR_FIELDS(threshold_limit);
+ATTR_FIELDS(error_count);
+
+static struct attribute *default_attrs[] = {
+	&interrupt_enable.attr,
+	&threshold_limit.attr,
+	&error_count.attr,
+	NULL
+};
+
+#define to_bank(k) container_of(k,struct threshold_bank,kobj)
+#define to_attr(a) container_of(a,struct threshold_attr,attr)
+
+static ssize_t show(struct kobject *kobj, struct attribute *attr, char *buf)
+{
+	struct threshold_bank *b = to_bank(kobj);
+	struct threshold_attr *a = to_attr(attr);
+	ssize_t ret;
+	ret = a->show ? a->show(b, buf) : -EIO;
+	return ret;
+}
+
+static ssize_t store(struct kobject *kobj, struct attribute *attr,
+		     const char *buf, size_t count)
+{
+	struct threshold_bank *b = to_bank(kobj);
+	struct threshold_attr *a = to_attr(attr);
+	ssize_t ret;
+	ret = a->store ? a->store(b, buf, count) : -EIO;
+	return ret;
+}
+
+static struct sysfs_ops threshold_ops = {
+	.show = show,
+	.store = store,
+};
+
+static struct kobj_type threshold_ktype = {
+	.sysfs_ops = &threshold_ops,
+	.default_attrs = default_attrs,
+};
+
+/* symlinks sibling shared banks to first core.  first core owns dir/files. */
+static __cpuinit int threshold_create_bank(unsigned int cpu, int bank)
+{
+	int err = 0;
+	struct threshold_bank *b = 0;
+
+#ifdef CONFIG_SMP
+	if (cpu_core_id[cpu] && shared_bank[bank]) {	/* symlink */
+		char name[16];
+		unsigned lcpu = first_cpu(cpu_core_map[cpu]);
+		if (cpu_core_id[lcpu])
+			goto out;	/* first core not up yet */
+
+		b = per_cpu(threshold_banks, lcpu)[bank];
+		if (!b)
+			goto out;
+		sprintf(name, "bank%i", bank);
+		err = sysfs_create_link(&per_cpu(device_threshold, cpu).kobj,
+					&b->kobj, name);
+		if (err)
+			goto out;
+		per_cpu(threshold_banks, cpu)[bank] = b;
+		goto out;
+	}
+#endif
+
+	b = kmalloc(sizeof(struct threshold_bank), GFP_KERNEL);
+	if (!b) {
+		err = -ENOMEM;
+		goto out;
+	}
+	memset(b, 0, sizeof(struct threshold_bank));
+
+	b->cpu = cpu;
+	b->bank = bank;
+	b->interrupt_enable = 0;
+	b->threshold_limit = THRESHOLD_MAX;
+	kobject_set_name(&b->kobj, "bank%i", bank);
+	b->kobj.parent = &per_cpu(device_threshold, cpu).kobj;
+	b->kobj.ktype = &threshold_ktype;
+
+	err = kobject_register(&b->kobj);
+	if (err) {
+		kfree(b);
+		goto out;
+	}
+	per_cpu(threshold_banks, cpu)[bank] = b;
+      out:
+	return err;
+}
+
+/* create dir/files for all valid threshold banks */
+static __cpuinit int threshold_create_device(unsigned int cpu)
+{
+	int bank;
+	int err = 0;
+
+	per_cpu(device_threshold, cpu).id = cpu;
+	per_cpu(device_threshold, cpu).cls = &threshold_sysclass;
+	err = sysdev_register(&per_cpu(device_threshold, cpu));
+	if (err)
+		goto out;
+
+	for (bank = 0; bank < NR_BANKS; ++bank) {
+		if (!(per_cpu(bank_map, cpu) & 1 << bank))
+			continue;
+		err = threshold_create_bank(cpu, bank);
+		if (err)
+			goto out;
+	}
+      out:
+	return err;
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+/*
+ * let's be hotplug friendly.
+ * in case of multiple core processors, the first core always takes ownership
+ *   of shared sysfs dir/files, and rest of the cores will be symlinked to it.
+ */
+
+/* cpu hotplug call removes all symlinks before first core dies */
+static __cpuinit void threshold_remove_bank(unsigned int cpu, int bank)
+{
+	struct threshold_bank *b;
+	char name[16];
+
+	b = per_cpu(threshold_banks, cpu)[bank];
+	if (!b)
+		return;
+	if (shared_bank[bank] && atomic_read(&b->kobj.kref.refcount) > 2) {
+		sprintf(name, "bank%i", bank);
+		sysfs_remove_link(&per_cpu(device_threshold, cpu).kobj, name);
+		per_cpu(threshold_banks, cpu)[bank] = 0;
+	} else {
+		kobject_unregister(&b->kobj);
+		kfree(per_cpu(threshold_banks, cpu)[bank]);
+	}
+}
+
+static __cpuinit void threshold_remove_device(unsigned int cpu)
+{
+	int bank;
+
+	for (bank = 0; bank < NR_BANKS; ++bank) {
+		if (!(per_cpu(bank_map, cpu) & 1 << bank))
+			continue;
+		threshold_remove_bank(cpu, bank);
+	}
+	sysdev_unregister(&per_cpu(device_threshold, cpu));
+}
+
+/* link all existing siblings when first core comes up */
+static __cpuinit int threshold_create_symlinks(unsigned int cpu)
+{
+	int bank, err = 0;
+	unsigned int lcpu = 0;
+
+	if (cpu_core_id[cpu])
+		return 0;
+	for_each_cpu_mask(lcpu, cpu_core_map[cpu]) {
+		if (lcpu == cpu)
+			continue;
+		for (bank = 0; bank < NR_BANKS; ++bank) {
+			if (!(per_cpu(bank_map, cpu) & 1 << bank))
+				continue;
+			if (!shared_bank[bank])
+				continue;
+			err = threshold_create_bank(lcpu, bank);
+		}
+	}
+	return err;
+}
+
+/* remove all symlinks before first core dies. */
+static __cpuinit void threshold_remove_symlinks(unsigned int cpu)
+{
+	int bank;
+	unsigned int lcpu = 0;
+	if (cpu_core_id[cpu])
+		return;
+	for_each_cpu_mask(lcpu, cpu_core_map[cpu]) {
+		if (lcpu == cpu)
+			continue;
+		for (bank = 0; bank < NR_BANKS; ++bank) {
+			if (!(per_cpu(bank_map, cpu) & 1 << bank))
+				continue;
+			if (!shared_bank[bank])
+				continue;
+			threshold_remove_bank(lcpu, bank);
+		}
+	}
+}
+#else /* !CONFIG_HOTPLUG_CPU */
+static __cpuinit void threshold_create_symlinks(unsigned int cpu)
+{
+}
+static __cpuinit void threshold_remove_symlinks(unsigned int cpu)
+{
+}
+static void threshold_remove_device(unsigned int cpu)
+{
+}
+#endif
+
+/* get notified when a cpu comes on/off */
+static __cpuinit int threshold_cpu_callback(struct notifier_block *nfb,
+					    unsigned long action, void *hcpu)
+{
+	/* cpu was unsigned int to begin with */
+	unsigned int cpu = (unsigned long)hcpu;
+
+	if (cpu >= NR_CPUS)
+		goto out;
+
+	switch (action) {
+	case CPU_ONLINE:
+		threshold_create_device(cpu);
+		threshold_create_symlinks(cpu);
+		break;
+	case CPU_DOWN_PREPARE:
+		threshold_remove_symlinks(cpu);
+		break;
+	case CPU_DOWN_FAILED:
+		threshold_create_symlinks(cpu);
+		break;
+	case CPU_DEAD:
+		threshold_remove_device(cpu);
+		break;
+	default:
+		break;
+	}
+      out:
+	return NOTIFY_OK;
+}
+
+static struct notifier_block threshold_cpu_notifier = {
+	.notifier_call = threshold_cpu_callback,
+};
+
+static __init int threshold_init_device(void)
+{
+	int err;
+	int lcpu = 0;
+
+	err = sysdev_class_register(&threshold_sysclass);
+	if (err)
+		goto out;
+
+	/* to hit CPUs online before the notifier is up */
+	for_each_online_cpu(lcpu) {
+		err = threshold_create_device(lcpu);
+		if (err)
+			goto out;
+	}
+	register_cpu_notifier(&threshold_cpu_notifier);
+
+      out:
+	return err;
+}
+
+device_initcall(threshold_init_device);
diff --git a/arch/x86_64/kernel/mpparse.c b/arch/x86_64/kernel/mpparse.c
index f16d38d09da..1105250bf02 100644
--- a/arch/x86_64/kernel/mpparse.c
+++ b/arch/x86_64/kernel/mpparse.c
@@ -42,7 +42,7 @@ int acpi_found_madt;
  * Various Linux-internal data structures created from the
  * MP-table.
  */
-int apic_version [MAX_APICS];
+unsigned char apic_version [MAX_APICS];
 unsigned char mp_bus_id_to_type [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = -1 };
 int mp_bus_id_to_pci_bus [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = -1 };
 
@@ -65,7 +65,9 @@ unsigned long mp_lapic_addr = 0;
 /* Processor that is doing the boot up */
 unsigned int boot_cpu_id = -1U;
 /* Internal processor count */
-static unsigned int num_processors = 0;
+unsigned int num_processors __initdata = 0;
+
+unsigned disabled_cpus __initdata;
 
 /* Bitmask of physically existing CPUs */
 physid_mask_t phys_cpu_present_map = PHYSID_MASK_NONE;
@@ -106,11 +108,14 @@ static int __init mpf_checksum(unsigned char *mp, int len)
 
 static void __init MP_processor_info (struct mpc_config_processor *m)
 {
-	int ver, cpu;
+	int cpu;
+	unsigned char ver;
 	static int found_bsp=0;
 
-	if (!(m->mpc_cpuflag & CPU_ENABLED))
+	if (!(m->mpc_cpuflag & CPU_ENABLED)) {
+		disabled_cpus++;
 		return;
+	}
 
 	printk(KERN_INFO "Processor #%d %d:%d APIC version %d\n",
 		m->mpc_apicid,
@@ -129,12 +134,14 @@ static void __init MP_processor_info (struct mpc_config_processor *m)
 	}
 
 	cpu = num_processors++;
-
-	if (m->mpc_apicid > MAX_APICS) {
+	
+#if MAX_APICS < 255	
+	if ((int)m->mpc_apicid > MAX_APICS) {
 		printk(KERN_ERR "Processor #%d INVALID. (Max ID: %d).\n",
 			m->mpc_apicid, MAX_APICS);
 		return;
 	}
+#endif
 	ver = m->mpc_apicver;
 
 	physid_set(m->mpc_apicid, phys_cpu_present_map);
@@ -218,7 +225,7 @@ static void __init MP_intsrc_info (struct mpc_config_intsrc *m)
 			m->mpc_irqtype, m->mpc_irqflag & 3,
 			(m->mpc_irqflag >> 2) & 3, m->mpc_srcbus,
 			m->mpc_srcbusirq, m->mpc_dstapic, m->mpc_dstirq);
-	if (++mp_irq_entries == MAX_IRQ_SOURCES)
+	if (++mp_irq_entries >= MAX_IRQ_SOURCES)
 		panic("Max # of irq sources exceeded!!\n");
 }
 
@@ -549,7 +556,7 @@ void __init get_smp_config (void)
 		 * Read the physical hardware table.  Anything here will
 		 * override the defaults.
 		 */
-		if (!smp_read_mpc((void *)(unsigned long)mpf->mpf_physptr)) {
+		if (!smp_read_mpc(phys_to_virt(mpf->mpf_physptr))) {
 			smp_found_config = 0;
 			printk(KERN_ERR "BIOS bug, MP table errors detected!...\n");
 			printk(KERN_ERR "... disabling SMP support. (tell your hw vendor)\n");
diff --git a/arch/x86_64/kernel/pci-gart.c b/arch/x86_64/kernel/pci-gart.c
index 88be97c9698..2e28e855ec3 100644
--- a/arch/x86_64/kernel/pci-gart.c
+++ b/arch/x86_64/kernel/pci-gart.c
@@ -220,6 +220,12 @@ dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
 	   uses the normal dma_mask for alloc_coherent. */
 	dma_mask &= *dev->dma_mask;
 
+	/* Why <=? Even when the mask is smaller than 4GB it is often larger 
+	   than 16MB and in this case we have a chance of finding fitting memory 
+	   in the next higher zone first. If not retry with true GFP_DMA. -AK */
+	if (dma_mask <= 0xffffffff)
+		gfp |= GFP_DMA32;
+
  again:
 	memory = dma_alloc_pages(dev, gfp, get_order(size));
 	if (memory == NULL)
@@ -245,7 +251,7 @@ dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
 				}
 
 				if (!(gfp & GFP_DMA)) { 
-					gfp |= GFP_DMA; 
+					gfp = (gfp & ~GFP_DMA32) | GFP_DMA;
 					goto again;
 				}
 				return NULL;
diff --git a/arch/x86_64/kernel/process.c b/arch/x86_64/kernel/process.c
index 59be85d9a4b..5afd63e8cef 100644
--- a/arch/x86_64/kernel/process.c
+++ b/arch/x86_64/kernel/process.c
@@ -144,7 +144,8 @@ void cpu_idle_wait(void)
 	do {
 		ssleep(1);
 		for_each_online_cpu(cpu) {
-			if (cpu_isset(cpu, map) && !per_cpu(cpu_idle_state, cpu))
+			if (cpu_isset(cpu, map) &&
+					!per_cpu(cpu_idle_state, cpu))
 				cpu_clear(cpu, map);
 		}
 		cpus_and(map, map, cpu_online_map);
@@ -275,7 +276,8 @@ void __show_regs(struct pt_regs * regs)
 		system_utsname.version);
 	printk("RIP: %04lx:[<%016lx>] ", regs->cs & 0xffff, regs->rip);
 	printk_address(regs->rip); 
-	printk("\nRSP: %04lx:%016lx  EFLAGS: %08lx\n", regs->ss, regs->rsp, regs->eflags);
+	printk("\nRSP: %04lx:%016lx  EFLAGS: %08lx\n", regs->ss, regs->rsp,
+		regs->eflags);
 	printk("RAX: %016lx RBX: %016lx RCX: %016lx\n",
 	       regs->rax, regs->rbx, regs->rcx);
 	printk("RDX: %016lx RSI: %016lx RDI: %016lx\n",
@@ -427,15 +429,14 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long rsp,
 	struct pt_regs * childregs;
 	struct task_struct *me = current;
 
-	childregs = ((struct pt_regs *) (THREAD_SIZE + (unsigned long) p->thread_info)) - 1;
-
+	childregs = ((struct pt_regs *)
+			(THREAD_SIZE + (unsigned long) p->thread_info)) - 1;
 	*childregs = *regs;
 
 	childregs->rax = 0;
 	childregs->rsp = rsp;
-	if (rsp == ~0UL) {
+	if (rsp == ~0UL)
 		childregs->rsp = (unsigned long)childregs;
-	}
 
 	p->thread.rsp = (unsigned long) childregs;
 	p->thread.rsp0 = (unsigned long) (childregs+1);
@@ -457,7 +458,8 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long rsp,
 			p->thread.io_bitmap_max = 0;
 			return -ENOMEM;
 		}
-		memcpy(p->thread.io_bitmap_ptr, me->thread.io_bitmap_ptr, IO_BITMAP_BYTES);
+		memcpy(p->thread.io_bitmap_ptr, me->thread.io_bitmap_ptr,
+				IO_BITMAP_BYTES);
 	} 
 
 	/*
@@ -494,7 +496,8 @@ out:
  * - fold all the options into a flag word and test it with a single test.
  * - could test fs/gs bitsliced
  */
-struct task_struct *__switch_to(struct task_struct *prev_p, struct task_struct *next_p)
+struct task_struct *
+__switch_to(struct task_struct *prev_p, struct task_struct *next_p)
 {
 	struct thread_struct *prev = &prev_p->thread,
 				 *next = &next_p->thread;
@@ -565,7 +568,8 @@ struct task_struct *__switch_to(struct task_struct *prev_p, struct task_struct *
 	prev->userrsp = read_pda(oldrsp); 
 	write_pda(oldrsp, next->userrsp); 
 	write_pda(pcurrent, next_p); 
-	write_pda(kernelstack, (unsigned long)next_p->thread_info + THREAD_SIZE - PDA_STACKOFFSET);
+	write_pda(kernelstack,
+	    (unsigned long)next_p->thread_info + THREAD_SIZE - PDA_STACKOFFSET);
 
 	/*
 	 * Now maybe reload the debug registers
@@ -646,7 +650,9 @@ asmlinkage long sys_fork(struct pt_regs *regs)
 	return do_fork(SIGCHLD, regs->rsp, regs, 0, NULL, NULL);
 }
 
-asmlinkage long sys_clone(unsigned long clone_flags, unsigned long newsp, void __user *parent_tid, void __user *child_tid, struct pt_regs *regs)
+asmlinkage long
+sys_clone(unsigned long clone_flags, unsigned long newsp,
+	  void __user *parent_tid, void __user *child_tid, struct pt_regs *regs)
 {
 	if (!newsp)
 		newsp = regs->rsp;
@@ -682,7 +688,8 @@ unsigned long get_wchan(struct task_struct *p)
 		return 0;
 	fp = *(u64 *)(p->thread.rsp);
 	do { 
-		if (fp < (unsigned long)stack || fp > (unsigned long)stack+THREAD_SIZE)
+		if (fp < (unsigned long)stack ||
+		    fp > (unsigned long)stack+THREAD_SIZE)
 			return 0; 
 		rip = *(u64 *)(fp+8); 
 		if (!in_sched_functions(rip))
@@ -717,8 +724,8 @@ long do_arch_prctl(struct task_struct *task, int code, unsigned long addr)
 			task->thread.gsindex = 0;
 			task->thread.gs = addr;
 			if (doit) {
-		load_gs_index(0);
-		ret = checking_wrmsrl(MSR_KERNEL_GS_BASE, addr); 
+				load_gs_index(0);
+				ret = checking_wrmsrl(MSR_KERNEL_GS_BASE, addr);
 			} 
 		}
 		put_cpu();
@@ -735,7 +742,7 @@ long do_arch_prctl(struct task_struct *task, int code, unsigned long addr)
 			set_32bit_tls(task, FS_TLS, addr);
 			if (doit) { 
 				load_TLS(&task->thread, cpu); 
-				asm volatile("movl %0,%%fs" :: "r" (FS_TLS_SEL));
+				asm volatile("movl %0,%%fs" :: "r"(FS_TLS_SEL));
 			}
 			task->thread.fsindex = FS_TLS_SEL;
 			task->thread.fs = 0;
@@ -745,8 +752,8 @@ long do_arch_prctl(struct task_struct *task, int code, unsigned long addr)
 			if (doit) {
 				/* set the selector to 0 to not confuse
 				   __switch_to */
-		asm volatile("movl %0,%%fs" :: "r" (0));
-		ret = checking_wrmsrl(MSR_FS_BASE, addr); 
+				asm volatile("movl %0,%%fs" :: "r" (0));
+				ret = checking_wrmsrl(MSR_FS_BASE, addr);
 			}
 		}
 		put_cpu();
@@ -755,9 +762,9 @@ long do_arch_prctl(struct task_struct *task, int code, unsigned long addr)
 		unsigned long base; 
 		if (task->thread.fsindex == FS_TLS_SEL)
 			base = read_32bit_tls(task, FS_TLS);
-		else if (doit) {
+		else if (doit)
 			rdmsrl(MSR_FS_BASE, base);
-		} else
+		else
 			base = task->thread.fs;
 		ret = put_user(base, (unsigned long __user *)addr); 
 		break; 
@@ -766,9 +773,9 @@ long do_arch_prctl(struct task_struct *task, int code, unsigned long addr)
 		unsigned long base;
 		if (task->thread.gsindex == GS_TLS_SEL)
 			base = read_32bit_tls(task, GS_TLS);
-		else if (doit) {
+		else if (doit)
 			rdmsrl(MSR_KERNEL_GS_BASE, base);
-		} else
+		else
 			base = task->thread.gs;
 		ret = put_user(base, (unsigned long __user *)addr); 
 		break;
diff --git a/arch/x86_64/kernel/reboot.c b/arch/x86_64/kernel/reboot.c
index 47f95687905..75235ed2b31 100644
--- a/arch/x86_64/kernel/reboot.c
+++ b/arch/x86_64/kernel/reboot.c
@@ -77,6 +77,7 @@ static inline void kb_wait(void)
 
 void machine_shutdown(void)
 {
+	unsigned long flags;
 	/* Stop the cpus and apics */
 #ifdef CONFIG_SMP
 	int reboot_cpu_id;
@@ -98,7 +99,7 @@ void machine_shutdown(void)
 	smp_send_stop();
 #endif
 
-	local_irq_disable();
+	local_irq_save(flags);
 
 #ifndef CONFIG_SMP
 	disable_local_APIC();
@@ -106,7 +107,7 @@ void machine_shutdown(void)
 
 	disable_IO_APIC();
 
-	local_irq_enable();
+	local_irq_restore(flags);
 }
 
 void machine_emergency_restart(void)
@@ -120,7 +121,7 @@ void machine_emergency_restart(void)
 		/* Could also try the reset bit in the Hammer NB */
 		switch (reboot_type) { 
 		case BOOT_KBD:
-		for (i=0; i<100; i++) {
+		for (i=0; i<10; i++) {
 			kb_wait();
 			udelay(50);
 			outb(0xfe,0x64);         /* pulse reset low */
diff --git a/arch/x86_64/kernel/setup.c b/arch/x86_64/kernel/setup.c
index da0bc3e7bdf..750e01dcbdf 100644
--- a/arch/x86_64/kernel/setup.c
+++ b/arch/x86_64/kernel/setup.c
@@ -60,6 +60,7 @@
 #include <asm/setup.h>
 #include <asm/mach_apic.h>
 #include <asm/numa.h>
+#include <asm/sections.h>
 
 /*
  * Machine setup..
@@ -103,7 +104,6 @@ struct edid_info edid_info;
 struct e820map e820;
 
 extern int root_mountflags;
-extern char _text, _etext, _edata, _end;
 
 char command_line[COMMAND_LINE_SIZE];
 
@@ -412,7 +412,6 @@ contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
 {
 	unsigned long bootmap_size, bootmap;
 
-	memory_present(0, start_pfn, end_pfn);
 	bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
 	bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size);
 	if (bootmap == -1L)
@@ -571,6 +570,8 @@ void __init setup_arch(char **cmdline_p)
 
 	init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT));
 
+	zap_low_mappings(0);
+
 #ifdef CONFIG_ACPI
 	/*
 	 * Initialize the ACPI boot-time table parser (gets the RSDP and SDT).
@@ -657,8 +658,6 @@ void __init setup_arch(char **cmdline_p)
 	}
 #endif
 
-	sparse_init();
-
 	paging_init();
 
 	check_ioapic();
@@ -793,7 +792,7 @@ static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
 #endif
 
 	bits = 0;
-	while ((1 << bits) < c->x86_num_cores)
+	while ((1 << bits) < c->x86_max_cores)
 		bits++;
 
 	/* Low order bits define the core id (index of core in socket) */
@@ -823,10 +822,10 @@ static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
  		if (!node_online(node))
  			node = nearby_node(apicid);
  	}
-  	cpu_to_node[cpu] = node;
+	numa_set_node(cpu, node);
 
   	printk(KERN_INFO "CPU %d(%d) -> Node %d -> Core %d\n",
-  			cpu, c->x86_num_cores, node, cpu_core_id[cpu]);
+  			cpu, c->x86_max_cores, node, cpu_core_id[cpu]);
 #endif
 #endif
 }
@@ -875,9 +874,9 @@ static int __init init_amd(struct cpuinfo_x86 *c)
 	display_cacheinfo(c);
 
 	if (c->extended_cpuid_level >= 0x80000008) {
-		c->x86_num_cores = (cpuid_ecx(0x80000008) & 0xff) + 1;
-		if (c->x86_num_cores & (c->x86_num_cores - 1))
-			c->x86_num_cores = 1;
+		c->x86_max_cores = (cpuid_ecx(0x80000008) & 0xff) + 1;
+		if (c->x86_max_cores & (c->x86_max_cores - 1))
+			c->x86_max_cores = 1;
 
 		amd_detect_cmp(c);
 	}
@@ -889,54 +888,44 @@ static void __cpuinit detect_ht(struct cpuinfo_x86 *c)
 {
 #ifdef CONFIG_SMP
 	u32 	eax, ebx, ecx, edx;
-	int 	index_msb, tmp;
+	int 	index_msb, core_bits;
 	int 	cpu = smp_processor_id();
-	
+
+	cpuid(1, &eax, &ebx, &ecx, &edx);
+
+	c->apicid = phys_pkg_id(0);
+
 	if (!cpu_has(c, X86_FEATURE_HT) || cpu_has(c, X86_FEATURE_CMP_LEGACY))
 		return;
 
-	cpuid(1, &eax, &ebx, &ecx, &edx);
 	smp_num_siblings = (ebx & 0xff0000) >> 16;
-	
+
 	if (smp_num_siblings == 1) {
 		printk(KERN_INFO  "CPU: Hyper-Threading is disabled\n");
-	} else if (smp_num_siblings > 1) {
-		index_msb = 31;
-		/*
-		 * At this point we only support two siblings per
-		 * processor package.
-		 */
+	} else if (smp_num_siblings > 1 ) {
+
 		if (smp_num_siblings > NR_CPUS) {
 			printk(KERN_WARNING "CPU: Unsupported number of the siblings %d", smp_num_siblings);
 			smp_num_siblings = 1;
 			return;
 		}
-		tmp = smp_num_siblings;
-		while ((tmp & 0x80000000 ) == 0) {
-			tmp <<=1 ;
-			index_msb--;
-		}
-		if (smp_num_siblings & (smp_num_siblings - 1))
-			index_msb++;
+
+		index_msb = get_count_order(smp_num_siblings);
 		phys_proc_id[cpu] = phys_pkg_id(index_msb);
-		
+
 		printk(KERN_INFO  "CPU: Physical Processor ID: %d\n",
 		       phys_proc_id[cpu]);
 
-		smp_num_siblings = smp_num_siblings / c->x86_num_cores;
+		smp_num_siblings = smp_num_siblings / c->x86_max_cores;
 
-		tmp = smp_num_siblings;
-		index_msb = 31;
-		while ((tmp & 0x80000000) == 0) {
-			tmp <<=1 ;
-			index_msb--;
-		}
-		if (smp_num_siblings & (smp_num_siblings - 1))
-			index_msb++;
+		index_msb = get_count_order(smp_num_siblings) ;
 
-		cpu_core_id[cpu] = phys_pkg_id(index_msb);
+		core_bits = get_count_order(c->x86_max_cores);
 
-		if (c->x86_num_cores > 1)
+		cpu_core_id[cpu] = phys_pkg_id(index_msb) &
+					       ((1 << core_bits) - 1);
+
+		if (c->x86_max_cores > 1)
 			printk(KERN_INFO  "CPU: Processor Core ID: %d\n",
 			       cpu_core_id[cpu]);
 	}
@@ -975,7 +964,7 @@ static void srat_detect_node(void)
 	node = apicid_to_node[hard_smp_processor_id()];
 	if (node == NUMA_NO_NODE)
 		node = 0;
-	cpu_to_node[cpu] = node;
+	numa_set_node(cpu, node);
 
 	if (acpi_numa > 0)
 		printk(KERN_INFO "CPU %d -> Node %d\n", cpu, node);
@@ -993,13 +982,18 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
 		unsigned eax = cpuid_eax(0x80000008);
 		c->x86_virt_bits = (eax >> 8) & 0xff;
 		c->x86_phys_bits = eax & 0xff;
+		/* CPUID workaround for Intel 0F34 CPU */
+		if (c->x86_vendor == X86_VENDOR_INTEL &&
+		    c->x86 == 0xF && c->x86_model == 0x3 &&
+		    c->x86_mask == 0x4)
+			c->x86_phys_bits = 36;
 	}
 
 	if (c->x86 == 15)
 		c->x86_cache_alignment = c->x86_clflush_size * 2;
 	if (c->x86 >= 15)
 		set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
- 	c->x86_num_cores = intel_num_cpu_cores(c);
+ 	c->x86_max_cores = intel_num_cpu_cores(c);
 
 	srat_detect_node();
 }
@@ -1037,7 +1031,7 @@ void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
 	c->x86_model_id[0] = '\0';  /* Unset */
 	c->x86_clflush_size = 64;
 	c->x86_cache_alignment = c->x86_clflush_size;
-	c->x86_num_cores = 1;
+	c->x86_max_cores = 1;
 	c->extended_cpuid_level = 0;
 	memset(&c->x86_capability, 0, sizeof c->x86_capability);
 
@@ -1060,10 +1054,10 @@ void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
 		c->x86 = (tfms >> 8) & 0xf;
 		c->x86_model = (tfms >> 4) & 0xf;
 		c->x86_mask = tfms & 0xf;
-		if (c->x86 == 0xf) {
+		if (c->x86 == 0xf)
 			c->x86 += (tfms >> 20) & 0xff;
+		if (c->x86 >= 0x6)
 			c->x86_model += ((tfms >> 16) & 0xF) << 4;
-		} 
 		if (c->x86_capability[0] & (1<<19)) 
 			c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
 	} else {
@@ -1271,13 +1265,12 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 		seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
 	
 #ifdef CONFIG_SMP
-	if (smp_num_siblings * c->x86_num_cores > 1) {
+	if (smp_num_siblings * c->x86_max_cores > 1) {
 		int cpu = c - cpu_data;
 		seq_printf(m, "physical id\t: %d\n", phys_proc_id[cpu]);
-		seq_printf(m, "siblings\t: %d\n",
-				c->x86_num_cores * smp_num_siblings);
+		seq_printf(m, "siblings\t: %d\n", cpus_weight(cpu_core_map[cpu]));
 		seq_printf(m, "core id\t\t: %d\n", cpu_core_id[cpu]);
-		seq_printf(m, "cpu cores\t: %d\n", c->x86_num_cores);
+		seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
 	}
 #endif	
 
diff --git a/arch/x86_64/kernel/setup64.c b/arch/x86_64/kernel/setup64.c
index 79190891fbc..06dc354375c 100644
--- a/arch/x86_64/kernel/setup64.c
+++ b/arch/x86_64/kernel/setup64.c
@@ -141,7 +141,6 @@ void pda_init(int cpu)
 			panic("cannot allocate irqstack for cpu %d", cpu); 
 	}
 
-	asm volatile("movq %0,%%cr3" :: "r" (__pa_symbol(&init_level4_pgt)));
 
 	pda->irqstackptr += IRQSTACKSIZE-64;
 } 
@@ -197,6 +196,7 @@ void __cpuinit cpu_init (void)
 	/* CPU 0 is initialised in head64.c */
 	if (cpu != 0) {
 		pda_init(cpu);
+		zap_low_mappings(cpu);
 	} else 
 		estacks = boot_exception_stacks; 
 
diff --git a/arch/x86_64/kernel/signal.c b/arch/x86_64/kernel/signal.c
index d642fbf3da2..5876df116c9 100644
--- a/arch/x86_64/kernel/signal.c
+++ b/arch/x86_64/kernel/signal.c
@@ -110,6 +110,15 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, unsigned
 	COPY(r14);
 	COPY(r15);
 
+	/* Kernel saves and restores only the CS segment register on signals,
+	 * which is the bare minimum needed to allow mixed 32/64-bit code.
+	 * App's signal handler can save/restore other segments if needed. */
+	{
+		unsigned cs;
+		err |= __get_user(cs, &sc->cs);
+		regs->cs = cs | 3;	/* Force into user mode */
+	}
+
 	{
 		unsigned int tmpflags;
 		err |= __get_user(tmpflags, &sc->eflags);
@@ -187,6 +196,7 @@ setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, unsigned lo
 {
 	int err = 0;
 
+	err |= __put_user(regs->cs, &sc->cs);
 	err |= __put_user(0, &sc->gs);
 	err |= __put_user(0, &sc->fs);
 
@@ -318,7 +328,14 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 
 	regs->rsp = (unsigned long)frame;
 
+	/* Set up the CS register to run signal handlers in 64-bit mode,
+	   even if the handler happens to be interrupting 32-bit code. */
+	regs->cs = __USER_CS;
+
+	/* This, by contrast, has nothing to do with segment registers -
+	   see include/asm-x86_64/uaccess.h for details. */
 	set_fs(USER_DS);
+
 	regs->eflags &= ~TF_MASK;
 	if (test_thread_flag(TIF_SINGLESTEP))
 		ptrace_notify(SIGTRAP);
diff --git a/arch/x86_64/kernel/smp.c b/arch/x86_64/kernel/smp.c
index 9db9dda161b..cfc3d9dccbd 100644
--- a/arch/x86_64/kernel/smp.c
+++ b/arch/x86_64/kernel/smp.c
@@ -28,8 +28,6 @@
 #include <asm/proto.h>
 #include <asm/apicdef.h>
 
-#define __cpuinit __init
-
 /*
  *	Smarter SMP flushing macros. 
  *		c/o Linus Torvalds.
@@ -452,13 +450,14 @@ int smp_call_function (void (*func) (void *info), void *info, int nonatomic,
 
 void smp_stop_cpu(void)
 {
+	unsigned long flags;
 	/*
 	 * Remove this CPU:
 	 */
 	cpu_clear(smp_processor_id(), cpu_online_map);
-	local_irq_disable();
+	local_irq_save(flags);
 	disable_local_APIC();
-	local_irq_enable(); 
+	local_irq_restore(flags);
 }
 
 static void smp_really_stop_cpu(void *dummy)
diff --git a/arch/x86_64/kernel/smpboot.c b/arch/x86_64/kernel/smpboot.c
index c4e59bbdc18..683c33f7b96 100644
--- a/arch/x86_64/kernel/smpboot.c
+++ b/arch/x86_64/kernel/smpboot.c
@@ -64,6 +64,7 @@
 int smp_num_siblings = 1;
 /* Package ID of each logical CPU */
 u8 phys_proc_id[NR_CPUS] __read_mostly = { [0 ... NR_CPUS-1] = BAD_APICID };
+/* core ID of each logical CPU */
 u8 cpu_core_id[NR_CPUS] __read_mostly = { [0 ... NR_CPUS-1] = BAD_APICID };
 
 /* Bitmask of currently online CPUs */
@@ -87,7 +88,10 @@ struct cpuinfo_x86 cpu_data[NR_CPUS] __cacheline_aligned;
 /* Set when the idlers are all forked */
 int smp_threads_ready;
 
+/* representing HT siblings of each logical CPU */
 cpumask_t cpu_sibling_map[NR_CPUS] __read_mostly;
+
+/* representing HT and core siblings of each logical CPU */
 cpumask_t cpu_core_map[NR_CPUS] __read_mostly;
 EXPORT_SYMBOL(cpu_core_map);
 
@@ -434,30 +438,59 @@ void __cpuinit smp_callin(void)
 	cpu_set(cpuid, cpu_callin_map);
 }
 
+/* representing cpus for which sibling maps can be computed */
+static cpumask_t cpu_sibling_setup_map;
+
 static inline void set_cpu_sibling_map(int cpu)
 {
 	int i;
+	struct cpuinfo_x86 *c = cpu_data;
+
+	cpu_set(cpu, cpu_sibling_setup_map);
 
 	if (smp_num_siblings > 1) {
-		for_each_cpu(i) {
-			if (cpu_core_id[cpu] == cpu_core_id[i]) {
+		for_each_cpu_mask(i, cpu_sibling_setup_map) {
+			if (phys_proc_id[cpu] == phys_proc_id[i] &&
+			    cpu_core_id[cpu] == cpu_core_id[i]) {
 				cpu_set(i, cpu_sibling_map[cpu]);
 				cpu_set(cpu, cpu_sibling_map[i]);
+				cpu_set(i, cpu_core_map[cpu]);
+				cpu_set(cpu, cpu_core_map[i]);
 			}
 		}
 	} else {
 		cpu_set(cpu, cpu_sibling_map[cpu]);
 	}
 
-	if (current_cpu_data.x86_num_cores > 1) {
-		for_each_cpu(i) {
-			if (phys_proc_id[cpu] == phys_proc_id[i]) {
-				cpu_set(i, cpu_core_map[cpu]);
-				cpu_set(cpu, cpu_core_map[i]);
-			}
-		}
-	} else {
+	if (current_cpu_data.x86_max_cores == 1) {
 		cpu_core_map[cpu] = cpu_sibling_map[cpu];
+		c[cpu].booted_cores = 1;
+		return;
+	}
+
+	for_each_cpu_mask(i, cpu_sibling_setup_map) {
+		if (phys_proc_id[cpu] == phys_proc_id[i]) {
+			cpu_set(i, cpu_core_map[cpu]);
+			cpu_set(cpu, cpu_core_map[i]);
+			/*
+			 *  Does this new cpu bringup a new core?
+			 */
+			if (cpus_weight(cpu_sibling_map[cpu]) == 1) {
+				/*
+				 * for each core in package, increment
+				 * the booted_cores for this new cpu
+				 */
+				if (first_cpu(cpu_sibling_map[i]) == i)
+					c[cpu].booted_cores++;
+				/*
+				 * increment the core count for all
+				 * the other cpus in this package
+				 */
+				if (i != cpu)
+					c[i].booted_cores++;
+			} else if (i != cpu && !c[cpu].booted_cores)
+				c[cpu].booted_cores = c[i].booted_cores;
+		}
 	}
 }
 
@@ -879,6 +912,9 @@ static __init void disable_smp(void)
 }
 
 #ifdef CONFIG_HOTPLUG_CPU
+
+int additional_cpus __initdata = -1;
+
 /*
  * cpu_possible_map should be static, it cannot change as cpu's
  * are onlined, or offlined. The reason is per-cpu data-structures
@@ -887,14 +923,38 @@ static __init void disable_smp(void)
  * cpu_present_map on the other hand can change dynamically.
  * In case when cpu_hotplug is not compiled, then we resort to current
  * behaviour, which is cpu_possible == cpu_present.
- * If cpu-hotplug is supported, then we need to preallocate for all
- * those NR_CPUS, hence cpu_possible_map represents entire NR_CPUS range.
  * - Ashok Raj
+ *
+ * Three ways to find out the number of additional hotplug CPUs:
+ * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
+ * - otherwise use half of the available CPUs or 2, whatever is more.
+ * - The user can overwrite it with additional_cpus=NUM
+ * We do this because additional CPUs waste a lot of memory.
+ * -AK
  */
 __init void prefill_possible_map(void)
 {
 	int i;
-	for (i = 0; i < NR_CPUS; i++)
+	int possible;
+
+ 	if (additional_cpus == -1) {
+ 		if (disabled_cpus > 0) {
+ 			additional_cpus = disabled_cpus;
+ 		} else {
+ 			additional_cpus = num_processors / 2;
+ 			if (additional_cpus == 0)
+ 				additional_cpus = 2;
+ 		}
+ 	}
+	possible = num_processors + additional_cpus;
+	if (possible > NR_CPUS) 
+		possible = NR_CPUS;
+
+	printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
+		possible,
+	        max_t(int, possible - num_processors, 0));
+
+	for (i = 0; i < possible; i++)
 		cpu_set(i, cpu_possible_map);
 }
 #endif
@@ -965,6 +1025,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
 	nmi_watchdog_default();
 	current_cpu_data = boot_cpu_data;
 	current_thread_info()->cpu = 0;  /* needed? */
+	set_cpu_sibling_map(0);
 
 	if (smp_sanity_check(max_cpus) < 0) {
 		printk(KERN_INFO "SMP disabled\n");
@@ -1008,8 +1069,6 @@ void __init smp_prepare_boot_cpu(void)
 	int me = smp_processor_id();
 	cpu_set(me, cpu_online_map);
 	cpu_set(me, cpu_callout_map);
-	cpu_set(0, cpu_sibling_map[0]);
-	cpu_set(0, cpu_core_map[0]);
 	per_cpu(cpu_state, me) = CPU_ONLINE;
 }
 
@@ -1062,9 +1121,6 @@ int __cpuinit __cpu_up(unsigned int cpu)
  */
 void __init smp_cpus_done(unsigned int max_cpus)
 {
-#ifndef CONFIG_HOTPLUG_CPU
-	zap_low_mappings();
-#endif
 	smp_cleanup_boot();
 
 #ifdef CONFIG_X86_IO_APIC
@@ -1081,15 +1137,24 @@ void __init smp_cpus_done(unsigned int max_cpus)
 static void remove_siblinginfo(int cpu)
 {
 	int sibling;
+	struct cpuinfo_x86 *c = cpu_data;
 
+	for_each_cpu_mask(sibling, cpu_core_map[cpu]) {
+		cpu_clear(cpu, cpu_core_map[sibling]);
+		/*
+		 * last thread sibling in this cpu core going down
+		 */
+		if (cpus_weight(cpu_sibling_map[cpu]) == 1)
+			c[sibling].booted_cores--;
+	}
+			
 	for_each_cpu_mask(sibling, cpu_sibling_map[cpu])
 		cpu_clear(cpu, cpu_sibling_map[sibling]);
-	for_each_cpu_mask(sibling, cpu_core_map[cpu])
-		cpu_clear(cpu, cpu_core_map[sibling]);
 	cpus_clear(cpu_sibling_map[cpu]);
 	cpus_clear(cpu_core_map[cpu]);
 	phys_proc_id[cpu] = BAD_APICID;
 	cpu_core_id[cpu] = BAD_APICID;
+	cpu_clear(cpu, cpu_sibling_setup_map);
 }
 
 void remove_cpu_from_maps(void)
@@ -1153,6 +1218,12 @@ void __cpu_die(unsigned int cpu)
  	printk(KERN_ERR "CPU %u didn't die...\n", cpu);
 }
 
+static __init int setup_additional_cpus(char *s)
+{
+	return get_option(&s, &additional_cpus);
+}
+__setup("additional_cpus=", setup_additional_cpus);
+
 #else /* ... !CONFIG_HOTPLUG_CPU */
 
 int __cpu_disable(void)
diff --git a/arch/x86_64/kernel/sys_x86_64.c b/arch/x86_64/kernel/sys_x86_64.c
index cc7821c6885..6449ea8fe75 100644
--- a/arch/x86_64/kernel/sys_x86_64.c
+++ b/arch/x86_64/kernel/sys_x86_64.c
@@ -154,17 +154,3 @@ asmlinkage long sys_uname(struct new_utsname __user * name)
 		err |= copy_to_user(&name->machine, "i686", 5); 		
 	return err ? -EFAULT : 0;
 }
-
-asmlinkage long sys_time64(long __user * tloc)
-{
-	struct timeval now; 
-	int i; 
-
-	do_gettimeofday(&now);
-	i = now.tv_sec;
-	if (tloc) {
-		if (put_user(i,tloc))
-			i = -EFAULT;
-	}
-	return i;
-}
diff --git a/arch/x86_64/kernel/traps.c b/arch/x86_64/kernel/traps.c
index b5e09e6b553..bf337f49318 100644
--- a/arch/x86_64/kernel/traps.c
+++ b/arch/x86_64/kernel/traps.c
@@ -428,19 +428,6 @@ static void __kprobes do_trap(int trapnr, int signr, char *str,
 {
 	conditional_sti(regs);
 
-#ifdef CONFIG_CHECKING
-       { 
-               unsigned long gs; 
-               struct x8664_pda *pda = cpu_pda + safe_smp_processor_id(); 
-               rdmsrl(MSR_GS_BASE, gs); 
-               if (gs != (unsigned long)pda) { 
-                       wrmsrl(MSR_GS_BASE, pda); 
-                       printk("%s: wrong gs %lx expected %p rip %lx\n", str, gs, pda,
-			      regs->rip);
-               }
-       }
-#endif
-
 	if (user_mode(regs)) {
 		struct task_struct *tsk = current;
 
@@ -513,20 +500,6 @@ asmlinkage void __kprobes do_general_protection(struct pt_regs * regs,
 {
 	conditional_sti(regs);
 
-#ifdef CONFIG_CHECKING
-       { 
-               unsigned long gs; 
-               struct x8664_pda *pda = cpu_pda + safe_smp_processor_id(); 
-               rdmsrl(MSR_GS_BASE, gs); 
-               if (gs != (unsigned long)pda) { 
-                       wrmsrl(MSR_GS_BASE, pda); 
-		       oops_in_progress++;
-                       printk("general protection handler: wrong gs %lx expected %p\n", gs, pda);
-		       oops_in_progress--;
-               }
-       }
-#endif
-
 	if (user_mode(regs)) {
 		struct task_struct *tsk = current;
 
@@ -665,19 +638,6 @@ asmlinkage void __kprobes do_debug(struct pt_regs * regs,
 	struct task_struct *tsk = current;
 	siginfo_t info;
 
-#ifdef CONFIG_CHECKING
-       { 
-	       /* RED-PEN interaction with debugger - could destroy gs */
-               unsigned long gs; 
-               struct x8664_pda *pda = cpu_pda + safe_smp_processor_id(); 
-               rdmsrl(MSR_GS_BASE, gs); 
-               if (gs != (unsigned long)pda) { 
-                       wrmsrl(MSR_GS_BASE, pda); 
-                       printk("debug handler: wrong gs %lx expected %p\n", gs, pda);
-               }
-       }
-#endif
-
 	get_debugreg(condition, 6);
 
 	if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
@@ -888,6 +848,10 @@ asmlinkage void __attribute__((weak)) smp_thermal_interrupt(void)
 {
 }
 
+asmlinkage void __attribute__((weak)) mce_threshold_interrupt(void)
+{
+}
+
 /*
  *  'math_state_restore()' saves the current math information in the
  * old math state array, and gets the new ones from the current task
diff --git a/arch/x86_64/kernel/vmlinux.lds.S b/arch/x86_64/kernel/vmlinux.lds.S
index 6dd642cad2e..58b19215b4b 100644
--- a/arch/x86_64/kernel/vmlinux.lds.S
+++ b/arch/x86_64/kernel/vmlinux.lds.S
@@ -50,7 +50,7 @@ SECTIONS
 	*(.bss.page_aligned)	
 	*(.bss)
 	}
-  __bss_end = .;
+  __bss_stop = .;
 
   . = ALIGN(PAGE_SIZE);
   . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
diff --git a/arch/x86_64/kernel/x8664_ksyms.c b/arch/x86_64/kernel/x8664_ksyms.c
index fd99ddd009b..4a54221e10b 100644
--- a/arch/x86_64/kernel/x8664_ksyms.c
+++ b/arch/x86_64/kernel/x8664_ksyms.c
@@ -203,3 +203,6 @@ EXPORT_SYMBOL(flush_tlb_page);
 #endif
 
 EXPORT_SYMBOL(cpu_khz);
+
+EXPORT_SYMBOL(load_gs_index);
+
diff --git a/arch/x86_64/lib/clear_page.S b/arch/x86_64/lib/clear_page.S
index 30a9da458c1..43d9fa13618 100644
--- a/arch/x86_64/lib/clear_page.S
+++ b/arch/x86_64/lib/clear_page.S
@@ -5,46 +5,8 @@
 	.globl clear_page
 	.p2align 4
 clear_page:
-	xorl   %eax,%eax
-	movl   $4096/64,%ecx
-	.p2align 4
-.Lloop:
-	decl	%ecx
-#define PUT(x) movq %rax,x*8(%rdi) 
-	movq %rax,(%rdi)
-	PUT(1)
-	PUT(2)
-	PUT(3)
-	PUT(4)
-	PUT(5)
-	PUT(6)
-	PUT(7)
-	leaq	64(%rdi),%rdi
-	jnz	.Lloop
-	nop
-	ret
-clear_page_end:	
-	
-	/* C stepping K8 run faster using the string instructions.
-	   It is also a lot simpler. Use this when possible */
-	
-#include <asm/cpufeature.h>
-	    	
-	.section .altinstructions,"a"
-	.align 8
-	.quad  clear_page
-	.quad  clear_page_c
-	.byte  X86_FEATURE_K8_C
-	.byte  clear_page_end-clear_page	
-	.byte  clear_page_c_end-clear_page_c
-	.previous
-
-	.section .altinstr_replacement,"ax"
-clear_page_c:
 	movl $4096/8,%ecx
 	xorl %eax,%eax
 	rep 
 	stosq
 	ret
-clear_page_c_end:
-	.previous
diff --git a/arch/x86_64/lib/copy_page.S b/arch/x86_64/lib/copy_page.S
index dd3aa47b6bf..621a1976940 100644
--- a/arch/x86_64/lib/copy_page.S
+++ b/arch/x86_64/lib/copy_page.S
@@ -8,94 +8,7 @@
 	.globl copy_page
 	.p2align 4
 copy_page:
-	subq	$3*8,%rsp
-	movq	%rbx,(%rsp)
-	movq	%r12,1*8(%rsp)
-	movq	%r13,2*8(%rsp)
-			
-	movl	$(4096/64)-5,%ecx
-	.p2align 4
-.Loop64:	
-  	dec     %rcx
-
-	movq        (%rsi), %rax
-	movq      8 (%rsi), %rbx
-	movq     16 (%rsi), %rdx
-	movq     24 (%rsi), %r8
-	movq     32 (%rsi), %r9
-	movq     40 (%rsi), %r10
-	movq     48 (%rsi), %r11
-	movq     56 (%rsi), %r12
-
-	prefetcht0 5*64(%rsi)
-
-	movq     %rax,    (%rdi)
-	movq     %rbx,  8 (%rdi)
-	movq     %rdx, 16 (%rdi)
-	movq     %r8,  24 (%rdi)
-	movq     %r9,  32 (%rdi)
-	movq     %r10, 40 (%rdi)
-	movq     %r11, 48 (%rdi)
-	movq     %r12, 56 (%rdi)
-
-	leaq    64 (%rsi), %rsi
-	leaq    64 (%rdi), %rdi
-
-	jnz     .Loop64
-
-	movl	$5,%ecx
-	.p2align 4
-.Loop2:	
-	decl   %ecx
-
-	movq        (%rsi), %rax
-	movq      8 (%rsi), %rbx
-	movq     16 (%rsi), %rdx
-	movq     24 (%rsi), %r8
-	movq     32 (%rsi), %r9
-	movq     40 (%rsi), %r10
-	movq     48 (%rsi), %r11
-	movq     56 (%rsi), %r12
-
-	movq     %rax,    (%rdi)
-	movq     %rbx,  8 (%rdi)
-	movq     %rdx, 16 (%rdi)
-	movq     %r8,  24 (%rdi)
-	movq     %r9,  32 (%rdi)
-	movq     %r10, 40 (%rdi)
-	movq     %r11, 48 (%rdi)
-	movq     %r12, 56 (%rdi)
-	
-	leaq	64(%rdi),%rdi			
-	leaq	64(%rsi),%rsi			
-	
-	jnz	.Loop2		
-	
-	movq	(%rsp),%rbx
-	movq	1*8(%rsp),%r12
-	movq	2*8(%rsp),%r13
-	addq	$3*8,%rsp
-	ret
-	
-	/* C stepping K8 run faster using the string copy instructions.
-	   It is also a lot simpler. Use this when possible */
-
-#include <asm/cpufeature.h>		
-		
-	.section .altinstructions,"a"
-	.align 8
-	.quad  copy_page
-	.quad  copy_page_c
-	.byte  X86_FEATURE_K8_C
-	.byte  copy_page_c_end-copy_page_c
-	.byte  copy_page_c_end-copy_page_c
-	.previous
-
-	.section .altinstr_replacement,"ax"
-copy_page_c:
 	movl $4096/8,%ecx
 	rep 
 	movsq 
 	ret
-copy_page_c_end:
-	.previous
diff --git a/arch/x86_64/lib/memcpy.S b/arch/x86_64/lib/memcpy.S
index c6c46494fef..92dd8054460 100644
--- a/arch/x86_64/lib/memcpy.S
+++ b/arch/x86_64/lib/memcpy.S
@@ -11,6 +11,8 @@
  * 
  * Output:
  * rax original destination
+ * 
+ * TODO: check best memcpy for PSC
  */	
 
  	.globl __memcpy
@@ -18,95 +20,6 @@
 	.p2align 4
 __memcpy:
 memcpy:		
-	pushq %rbx
-	movq %rdi,%rax
-
-	movl %edx,%ecx
-	shrl $6,%ecx
-	jz .Lhandle_tail
-	
-	.p2align 4
-.Lloop_64:
-	decl %ecx
-	
-	movq (%rsi),%r11
-	movq 8(%rsi),%r8
-
-	movq %r11,(%rdi)
-	movq %r8,1*8(%rdi)
-
-	movq 2*8(%rsi),%r9
-	movq 3*8(%rsi),%r10
-
-	movq %r9,2*8(%rdi)
-	movq %r10,3*8(%rdi)
-		
-	movq 4*8(%rsi),%r11
-	movq 5*8(%rsi),%r8
-
-	movq %r11,4*8(%rdi)
-	movq %r8,5*8(%rdi)
-
-	movq 6*8(%rsi),%r9
-	movq 7*8(%rsi),%r10
-
-	movq %r9,6*8(%rdi)
-	movq %r10,7*8(%rdi)
-
-	leaq 64(%rsi),%rsi
-	leaq 64(%rdi),%rdi
-	jnz  .Lloop_64
-
-.Lhandle_tail:
-	movl %edx,%ecx
-	andl $63,%ecx
-	shrl $3,%ecx
-	jz   .Lhandle_7
-	.p2align 4
-.Lloop_8: 
-	decl %ecx
-	movq (%rsi),%r8
-	movq %r8,(%rdi) 
-	leaq 8(%rdi),%rdi
-	leaq 8(%rsi),%rsi
-	jnz  .Lloop_8
-
-.Lhandle_7:
-	movl %edx,%ecx
-	andl $7,%ecx
-	jz .Lende
-	.p2align 4
-.Lloop_1:
-	movb (%rsi),%r8b
-	movb %r8b,(%rdi) 
-	incq %rdi
-	incq %rsi
-	decl %ecx
-	jnz .Lloop_1
-	
-.Lende: 	
-	popq %rbx
-	ret
-.Lfinal:
-	
-	/* C stepping K8 run faster using the string copy instructions.
-	   It is also a lot simpler. Use this when possible */
-	
-	.section .altinstructions,"a"
-	.align 8
-	.quad  memcpy
-	.quad  memcpy_c
-	.byte  X86_FEATURE_K8_C
-	.byte  .Lfinal-memcpy
-	.byte  memcpy_c_end-memcpy_c	
-	.previous
-
-	.section .altinstr_replacement,"ax"
- /* rdi	destination
-  * rsi source
-  * rdx count
-  */			
-memcpy_c:
 	movq %rdi,%rax
 	movl %edx,%ecx
 	shrl $3,%ecx
@@ -117,5 +30,3 @@ memcpy_c:
 	rep
 	movsb
 	ret
-memcpy_c_end:
-	.previous
diff --git a/arch/x86_64/lib/memset.S b/arch/x86_64/lib/memset.S
index 4b4c4063864..2aa48f24ed1 100644
--- a/arch/x86_64/lib/memset.S
+++ b/arch/x86_64/lib/memset.S
@@ -13,98 +13,6 @@
 	.p2align 4
 memset:	
 __memset:
-	movq %rdi,%r10
-	movq %rdx,%r11
-
-	/* expand byte value  */
-	movzbl %sil,%ecx
-	movabs $0x0101010101010101,%rax
-	mul    %rcx		/* with rax, clobbers rdx */
-
-	/* align dst */
-	movl  %edi,%r9d		
-	andl  $7,%r9d	
-	jnz  .Lbad_alignment
-.Lafter_bad_alignment:
-	
-	movl %r11d,%ecx
-	shrl $6,%ecx
-	jz	 .Lhandle_tail
-
-	.p2align 4
-.Lloop_64:	
-	decl   %ecx
-	movq  %rax,(%rdi) 
-	movq  %rax,8(%rdi) 
-	movq  %rax,16(%rdi) 
-	movq  %rax,24(%rdi) 
-	movq  %rax,32(%rdi) 
-	movq  %rax,40(%rdi) 
-	movq  %rax,48(%rdi) 
-	movq  %rax,56(%rdi) 
-	leaq  64(%rdi),%rdi
-	jnz    .Lloop_64
-
-	/* Handle tail in loops. The loops should be faster than hard
-	   to predict jump tables. */ 
-	.p2align 4	   
-.Lhandle_tail:
-	movl	%r11d,%ecx
-	andl    $63&(~7),%ecx
-	jz 		.Lhandle_7
-	shrl	$3,%ecx
-	.p2align 4
-.Lloop_8:
-	decl   %ecx
-	movq  %rax,(%rdi)
-	leaq  8(%rdi),%rdi
-	jnz    .Lloop_8
-
-.Lhandle_7:
-	movl	%r11d,%ecx
-	andl	$7,%ecx
-	jz      .Lende
-	.p2align 4
-.Lloop_1:
-	decl    %ecx
-	movb 	%al,(%rdi)
-	leaq	1(%rdi),%rdi
-	jnz     .Lloop_1
-	
-.Lende:	
-	movq	%r10,%rax
-	ret
-
-.Lbad_alignment:
-	cmpq $7,%r11
-	jbe	.Lhandle_7
-	movq %rax,(%rdi)	/* unaligned store */
-	movq $8,%r8			
-	subq %r9,%r8 
-	addq %r8,%rdi
-	subq %r8,%r11
-	jmp .Lafter_bad_alignment
-
-	/* C stepping K8 run faster using the string instructions.
-	   It is also a lot simpler. Use this when possible */
-
-#include <asm/cpufeature.h>	
-		
-	.section .altinstructions,"a"
-	.align 8
-	.quad  memset
-	.quad  memset_c
-	.byte  X86_FEATURE_K8_C
-	.byte  memset_c_end-memset_c
-	.byte  memset_c_end-memset_c
-	.previous
-
-	.section .altinstr_replacement,"ax"
- /* rdi	destination
-  * rsi value
-  * rdx count
-  */			
-memset_c:	
 	movq %rdi,%r9
 	movl %edx,%r8d
 	andl $7,%r8d		
@@ -121,5 +29,3 @@ memset_c:
 	stosb
 	movq %r9,%rax
 	ret
-memset_c_end:
-	.previous
diff --git a/arch/x86_64/mm/fault.c b/arch/x86_64/mm/fault.c
index b75b872ec15..3a63707a698 100644
--- a/arch/x86_64/mm/fault.c
+++ b/arch/x86_64/mm/fault.c
@@ -308,18 +308,6 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
 	unsigned long flags;
 	siginfo_t info;
 
-#ifdef CONFIG_CHECKING
-	{ 
-		unsigned long gs; 
-		struct x8664_pda *pda = cpu_pda + stack_smp_processor_id(); 
-		rdmsrl(MSR_GS_BASE, gs); 
-		if (gs != (unsigned long)pda) { 
-			wrmsrl(MSR_GS_BASE, pda); 
-			printk("page_fault: wrong gs %lx expected %p\n", gs, pda);
-		}
-	}
-#endif
-
 	/* get the address */
 	__asm__("movq %%cr2,%0":"=r" (address));
 	if (notify_die(DIE_PAGE_FAULT, "page fault", regs, error_code, 14,
@@ -571,3 +559,10 @@ do_sigbus:
 	force_sig_info(SIGBUS, &info, tsk);
 	return;
 }
+
+static int __init enable_pagefaulttrace(char *str)
+{
+	page_fault_trace = 1;
+	return 0;
+}
+__setup("pagefaulttrace", enable_pagefaulttrace);
diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c
index e60a1a848de..286f6a624c3 100644
--- a/arch/x86_64/mm/init.c
+++ b/arch/x86_64/mm/init.c
@@ -22,6 +22,7 @@
 #include <linux/pagemap.h>
 #include <linux/bootmem.h>
 #include <linux/proc_fs.h>
+#include <linux/pci.h>
 
 #include <asm/processor.h>
 #include <asm/system.h>
@@ -36,16 +37,13 @@
 #include <asm/mmu_context.h>
 #include <asm/proto.h>
 #include <asm/smp.h>
+#include <asm/sections.h>
 
 #ifndef Dprintk
 #define Dprintk(x...)
 #endif
 
-#ifdef CONFIG_GART_IOMMU
-extern int swiotlb;
-#endif
-
-extern char _stext[];
+static unsigned long dma_reserve __initdata;
 
 DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
 
@@ -86,9 +84,6 @@ void show_mem(void)
 
 /* References to section boundaries */
 
-extern char _text, _etext, _edata, __bss_start, _end[];
-extern char __init_begin, __init_end;
-
 int after_bootmem;
 
 static void *spp_getpage(void)
@@ -308,42 +303,81 @@ void __init init_memory_mapping(unsigned long start, unsigned long end)
 	       table_end<<PAGE_SHIFT);
 }
 
-extern struct x8664_pda cpu_pda[NR_CPUS];
+void __cpuinit zap_low_mappings(int cpu)
+{
+	if (cpu == 0) {
+		pgd_t *pgd = pgd_offset_k(0UL);
+		pgd_clear(pgd);
+	} else {
+		/*
+		 * For AP's, zap the low identity mappings by changing the cr3
+		 * to init_level4_pgt and doing local flush tlb all
+		 */
+		asm volatile("movq %0,%%cr3" :: "r" (__pa_symbol(&init_level4_pgt)));
+	}
+	__flush_tlb_all();
+}
 
-/* Assumes all CPUs still execute in init_mm */
-void zap_low_mappings(void)
+/* Compute zone sizes for the DMA and DMA32 zones in a node. */
+__init void
+size_zones(unsigned long *z, unsigned long *h,
+	   unsigned long start_pfn, unsigned long end_pfn)
 {
-	pgd_t *pgd = pgd_offset_k(0UL);
-	pgd_clear(pgd);
-	flush_tlb_all();
+ 	int i;
+ 	unsigned long w;
+
+ 	for (i = 0; i < MAX_NR_ZONES; i++)
+ 		z[i] = 0;
+
+ 	if (start_pfn < MAX_DMA_PFN)
+ 		z[ZONE_DMA] = MAX_DMA_PFN - start_pfn;
+ 	if (start_pfn < MAX_DMA32_PFN) {
+ 		unsigned long dma32_pfn = MAX_DMA32_PFN;
+ 		if (dma32_pfn > end_pfn)
+ 			dma32_pfn = end_pfn;
+ 		z[ZONE_DMA32] = dma32_pfn - start_pfn;
+ 	}
+ 	z[ZONE_NORMAL] = end_pfn - start_pfn;
+
+ 	/* Remove lower zones from higher ones. */
+ 	w = 0;
+ 	for (i = 0; i < MAX_NR_ZONES; i++) {
+ 		if (z[i])
+ 			z[i] -= w;
+ 	        w += z[i];
+	}
+
+	/* Compute holes */
+	w = 0;
+	for (i = 0; i < MAX_NR_ZONES; i++) {
+		unsigned long s = w;
+		w += z[i];
+		h[i] = e820_hole_size(s, w);
+	}
+
+	/* Add the space pace needed for mem_map to the holes too. */
+	for (i = 0; i < MAX_NR_ZONES; i++)
+		h[i] += (z[i] * sizeof(struct page)) / PAGE_SIZE;
+
+	/* The 16MB DMA zone has the kernel and other misc mappings.
+ 	   Account them too */
+	if (h[ZONE_DMA]) {
+		h[ZONE_DMA] += dma_reserve;
+		if (h[ZONE_DMA] >= z[ZONE_DMA]) {
+			printk(KERN_WARNING
+				"Kernel too large and filling up ZONE_DMA?\n");
+			h[ZONE_DMA] = z[ZONE_DMA];
+		}
+	}
 }
 
 #ifndef CONFIG_NUMA
 void __init paging_init(void)
 {
-	{
-		unsigned long zones_size[MAX_NR_ZONES];
-		unsigned long holes[MAX_NR_ZONES];
-		unsigned int max_dma;
-
-		memset(zones_size, 0, sizeof(zones_size));
-		memset(holes, 0, sizeof(holes));
-
-		max_dma = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
-
-		if (end_pfn < max_dma) {
-			zones_size[ZONE_DMA] = end_pfn;
-			holes[ZONE_DMA] = e820_hole_size(0, end_pfn);
-		} else {
-			zones_size[ZONE_DMA] = max_dma;
-			holes[ZONE_DMA] = e820_hole_size(0, max_dma);
-			zones_size[ZONE_NORMAL] = end_pfn - max_dma;
-			holes[ZONE_NORMAL] = e820_hole_size(max_dma, end_pfn);
-		}
-		free_area_init_node(0, NODE_DATA(0), zones_size,
-                        __pa(PAGE_OFFSET) >> PAGE_SHIFT, holes);
-	}
-	return;
+	unsigned long zones[MAX_NR_ZONES], holes[MAX_NR_ZONES];
+	size_zones(zones, holes, 0, end_pfn);
+	free_area_init_node(0, NODE_DATA(0), zones,
+			    __pa(PAGE_OFFSET) >> PAGE_SHIFT, holes);
 }
 #endif
 
@@ -438,19 +472,16 @@ void __init mem_init(void)
 		datasize >> 10,
 		initsize >> 10);
 
+#ifdef CONFIG_SMP
 	/*
-	 * Subtle. SMP is doing its boot stuff late (because it has to
-	 * fork idle threads) - but it also needs low mappings for the
-	 * protected-mode entry to work. We zap these entries only after
-	 * the WP-bit has been tested.
+	 * Sync boot_level4_pgt mappings with the init_level4_pgt
+	 * except for the low identity mappings which are already zapped
+	 * in init_level4_pgt. This sync-up is essential for AP's bringup
 	 */
-#ifndef CONFIG_SMP
-	zap_low_mappings();
+	memcpy(boot_level4_pgt+1, init_level4_pgt+1, (PTRS_PER_PGD-1)*sizeof(pgd_t));
 #endif
 }
 
-extern char __initdata_begin[], __initdata_end[];
-
 void free_initmem(void)
 {
 	unsigned long addr;
@@ -464,7 +495,7 @@ void free_initmem(void)
 		totalram_pages++;
 	}
 	memset(__initdata_begin, 0xba, __initdata_end - __initdata_begin);
-	printk ("Freeing unused kernel memory: %luk freed\n", (&__init_end - &__init_begin) >> 10);
+	printk ("Freeing unused kernel memory: %luk freed\n", (__init_end - __init_begin) >> 10);
 }
 
 #ifdef CONFIG_BLK_DEV_INITRD
@@ -491,6 +522,8 @@ void __init reserve_bootmem_generic(unsigned long phys, unsigned len)
 #else       		
 	reserve_bootmem(phys, len);    
 #endif
+	if (phys+len <= MAX_DMA_PFN*PAGE_SIZE)
+		dma_reserve += len / PAGE_SIZE;
 }
 
 int kern_addr_valid(unsigned long addr) 
@@ -532,10 +565,6 @@ extern int exception_trace, page_fault_trace;
 static ctl_table debug_table2[] = {
 	{ 99, "exception-trace", &exception_trace, sizeof(int), 0644, NULL,
 	  proc_dointvec },
-#ifdef CONFIG_CHECKING
-	{ 100, "page-fault-trace", &page_fault_trace, sizeof(int), 0644, NULL,
-	  proc_dointvec },
-#endif
 	{ 0, }
 }; 
 
diff --git a/arch/x86_64/mm/k8topology.c b/arch/x86_64/mm/k8topology.c
index 65417b040c1..a5663e0bb01 100644
--- a/arch/x86_64/mm/k8topology.c
+++ b/arch/x86_64/mm/k8topology.c
@@ -108,6 +108,7 @@ int __init k8_scan_nodes(unsigned long start, unsigned long end)
 		limit >>= 16; 
 		limit <<= 24; 
 		limit |= (1<<24)-1;
+		limit++;
 
 		if (limit > end_pfn << PAGE_SHIFT)
 			limit = end_pfn << PAGE_SHIFT;
diff --git a/arch/x86_64/mm/numa.c b/arch/x86_64/mm/numa.c
index 21480382100..a828a01739c 100644
--- a/arch/x86_64/mm/numa.c
+++ b/arch/x86_64/mm/numa.c
@@ -38,38 +38,57 @@ cpumask_t node_to_cpumask[MAX_NUMNODES] __read_mostly;
 
 int numa_off __initdata;
 
-int __init compute_hash_shift(struct node *nodes, int numnodes)
+
+/*
+ * Given a shift value, try to populate memnodemap[]
+ * Returns :
+ * 1 if OK
+ * 0 if memnodmap[] too small (of shift too small)
+ * -1 if node overlap or lost ram (shift too big)
+ */
+static int __init populate_memnodemap(
+	const struct node *nodes, int numnodes, int shift)
 {
 	int i; 
-	int shift = 20;
-	unsigned long addr,maxend=0;
-	
-	for (i = 0; i < numnodes; i++)
-		if ((nodes[i].start != nodes[i].end) && (nodes[i].end > maxend))
-				maxend = nodes[i].end;
+	int res = -1;
+	unsigned long addr, end;
 
-	while ((1UL << shift) <  (maxend / NODEMAPSIZE))
-		shift++;
-
-	printk (KERN_DEBUG"Using %d for the hash shift. Max adder is %lx \n",
-			shift,maxend);
-	memset(memnodemap,0xff,sizeof(*memnodemap) * NODEMAPSIZE);
+	memset(memnodemap, 0xff, sizeof(memnodemap));
 	for (i = 0; i < numnodes; i++) {
-		if (nodes[i].start == nodes[i].end)
+		addr = nodes[i].start;
+		end = nodes[i].end;
+		if (addr >= end)
 			continue;
-		for (addr = nodes[i].start;
-		     addr < nodes[i].end;
-		     addr += (1UL << shift)) {
-			if (memnodemap[addr >> shift] != 0xff) {
-				printk(KERN_INFO
-	"Your memory is not aligned you need to rebuild your kernel "
-	"with a bigger NODEMAPSIZE shift=%d adder=%lu\n",
-					shift,addr);
+		if ((end >> shift) >= NODEMAPSIZE)
+			return 0;
+		do {
+			if (memnodemap[addr >> shift] != 0xff)
 				return -1;
-			} 
 			memnodemap[addr >> shift] = i;
-		} 
+			addr += (1 << shift);
+		} while (addr < end);
+		res = 1;
 	} 
+	return res;
+}
+
+int __init compute_hash_shift(struct node *nodes, int numnodes)
+{
+	int shift = 20;
+
+	while (populate_memnodemap(nodes, numnodes, shift + 1) >= 0)
+		shift++;
+
+	printk(KERN_DEBUG "Using %d for the hash shift.\n",
+		shift);
+
+	if (populate_memnodemap(nodes, numnodes, shift) != 1) {
+		printk(KERN_INFO
+	"Your memory is not aligned you need to rebuild your kernel "
+	"with a bigger NODEMAPSIZE shift=%d\n",
+			shift);
+		return -1;
+	}
 	return shift;
 }
 
@@ -94,7 +113,6 @@ void __init setup_node_bootmem(int nodeid, unsigned long start, unsigned long en
 	start_pfn = start >> PAGE_SHIFT;
 	end_pfn = end >> PAGE_SHIFT;
 
-	memory_present(nodeid, start_pfn, end_pfn);
 	nodedata_phys = find_e820_area(start, end, pgdat_size); 
 	if (nodedata_phys == -1L) 
 		panic("Cannot find memory pgdat in node %d\n", nodeid);
@@ -132,29 +150,14 @@ void __init setup_node_zones(int nodeid)
 	unsigned long start_pfn, end_pfn; 
 	unsigned long zones[MAX_NR_ZONES];
 	unsigned long holes[MAX_NR_ZONES];
-	unsigned long dma_end_pfn;
 
-	memset(zones, 0, sizeof(unsigned long) * MAX_NR_ZONES); 
-	memset(holes, 0, sizeof(unsigned long) * MAX_NR_ZONES);
+ 	start_pfn = node_start_pfn(nodeid);
+ 	end_pfn = node_end_pfn(nodeid);
 
-	start_pfn = node_start_pfn(nodeid);
-	end_pfn = node_end_pfn(nodeid);
+	Dprintk(KERN_INFO "setting up node %d %lx-%lx\n",
+		nodeid, start_pfn, end_pfn);
 
-	Dprintk(KERN_INFO "setting up node %d %lx-%lx\n", nodeid, start_pfn, end_pfn);
-	
-	/* All nodes > 0 have a zero length zone DMA */ 
-	dma_end_pfn = __pa(MAX_DMA_ADDRESS) >> PAGE_SHIFT; 
-	if (start_pfn < dma_end_pfn) { 
-		zones[ZONE_DMA] = dma_end_pfn - start_pfn;
-		holes[ZONE_DMA] = e820_hole_size(start_pfn, dma_end_pfn);
-		zones[ZONE_NORMAL] = end_pfn - dma_end_pfn; 
-		holes[ZONE_NORMAL] = e820_hole_size(dma_end_pfn, end_pfn);
-
-	} else { 
-		zones[ZONE_NORMAL] = end_pfn - start_pfn; 
-		holes[ZONE_NORMAL] = e820_hole_size(start_pfn, end_pfn);
-	} 
-    
+	size_zones(zones, holes, start_pfn, end_pfn);
 	free_area_init_node(nodeid, NODE_DATA(nodeid), zones,
 			    start_pfn, holes);
 } 
@@ -171,7 +174,7 @@ void __init numa_init_array(void)
 	for (i = 0; i < NR_CPUS; i++) {
 		if (cpu_to_node[i] != NUMA_NO_NODE)
 			continue;
-		cpu_to_node[i] = rr;
+ 		numa_set_node(i, rr);
 		rr = next_node(rr, node_online_map);
 		if (rr == MAX_NUMNODES)
 			rr = first_node(node_online_map);
@@ -205,8 +208,6 @@ static int numa_emulation(unsigned long start_pfn, unsigned long end_pfn)
  		if (i == numa_fake-1)
  			sz = (end_pfn<<PAGE_SHIFT) - nodes[i].start;
  		nodes[i].end = nodes[i].start + sz;
- 		if (i != numa_fake-1)
- 			nodes[i].end--;
  		printk(KERN_INFO "Faking node %d at %016Lx-%016Lx (%LuMB)\n",
  		       i,
  		       nodes[i].start, nodes[i].end,
@@ -257,7 +258,7 @@ void __init numa_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
 	nodes_clear(node_online_map);
 	node_set_online(0);
 	for (i = 0; i < NR_CPUS; i++)
-		cpu_to_node[i] = 0;
+		numa_set_node(i, 0);
 	node_to_cpumask[0] = cpumask_of_cpu(0);
 	setup_node_bootmem(0, start_pfn << PAGE_SHIFT, end_pfn << PAGE_SHIFT);
 }
@@ -267,6 +268,12 @@ __cpuinit void numa_add_cpu(int cpu)
 	set_bit(cpu, &node_to_cpumask[cpu_to_node(cpu)]);
 } 
 
+void __cpuinit numa_set_node(int cpu, int node)
+{
+	cpu_pda[cpu].nodenumber = node;
+	cpu_to_node[cpu] = node;
+}
+
 unsigned long __init numa_free_all_bootmem(void) 
 { 
 	int i;
@@ -277,9 +284,26 @@ unsigned long __init numa_free_all_bootmem(void)
 	return pages;
 } 
 
+#ifdef CONFIG_SPARSEMEM
+static void __init arch_sparse_init(void)
+{
+	int i;
+
+	for_each_online_node(i)
+		memory_present(i, node_start_pfn(i), node_end_pfn(i));
+
+	sparse_init();
+}
+#else
+#define arch_sparse_init() do {} while (0)
+#endif
+
 void __init paging_init(void)
 { 
 	int i;
+
+	arch_sparse_init();
+
 	for_each_online_node(i) {
 		setup_node_zones(i); 
 	}
diff --git a/arch/x86_64/mm/srat.c b/arch/x86_64/mm/srat.c
index 4b2e844c15a..33340bd1e32 100644
--- a/arch/x86_64/mm/srat.c
+++ b/arch/x86_64/mm/srat.c
@@ -71,8 +71,6 @@ static __init void cutoff_node(int i, unsigned long start, unsigned long end)
 			nd->start = nd->end;
 	}
 	if (nd->end > end) {
-		if (!(end & 0xfff))
-			end--;
 		nd->end = end;
 		if (nd->start > nd->end)
 			nd->start = nd->end;
@@ -166,8 +164,6 @@ acpi_numa_memory_affinity_init(struct acpi_table_memory_affinity *ma)
 		if (nd->end < end)
 			nd->end = end;
 	}
-	if (!(nd->end & 0xfff))
-		nd->end--;
 	printk(KERN_INFO "SRAT: Node %u PXM %u %Lx-%Lx\n", node, pxm,
 	       nd->start, nd->end);
 }
@@ -203,7 +199,7 @@ int __init acpi_scan_nodes(unsigned long start, unsigned long end)
 		if (cpu_to_node[i] == NUMA_NO_NODE)
 			continue;
 		if (!node_isset(cpu_to_node[i], nodes_parsed))
-			cpu_to_node[i] = NUMA_NO_NODE; 
+			numa_set_node(i, NUMA_NO_NODE);
 	}
 	numa_init_array();
 	return 0;
author	Linus Torvalds <torvalds@g5.osdl.org>	2005-11-14 19:56:02 -0800
committer	Linus Torvalds <torvalds@g5.osdl.org>	2005-11-14 19:56:02 -0800
commit	4060994c3e337b40e0f6fa8ce2cc178e021baf3d (patch)
tree	980297c1747ca89354bc879cc5d17903eacb19e2 /arch/x86_64
parent	0174f72f848dfe7dc7488799776303c81b181b16 (diff)
parent	d3ee871e63d0a0c70413dc0aa5534b8d6cd6ec37 (diff)