Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/li…

…nux-2.6

* 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6: (156 commits)
  [PATCH] x86-64: Export smp_call_function_single
  [PATCH] i386: Clean up smp_tune_scheduling()
  [PATCH] unwinder: move .eh_frame to RODATA
  [PATCH] unwinder: fully support linker generated .eh_frame_hdr section
  [PATCH] x86-64: don't use set_irq_regs()
  [PATCH] x86-64: check vector in setup_ioapic_dest to verify if need setup_IO_APIC_irq
  [PATCH] x86-64: Make ix86 default to HIGHMEM4G instead of NOHIGHMEM
  [PATCH] i386: replace kmalloc+memset with kzalloc
  [PATCH] x86-64: remove remaining pc98 code
  [PATCH] x86-64: remove unused variable
  [PATCH] x86-64: Fix constraints in atomic_add_return()
  [PATCH] x86-64: fix asm constraints in i386 atomic_add_return
  [PATCH] x86-64: Correct documentation for bzImage protocol v2.05
  [PATCH] x86-64: replace kmalloc+memset with kzalloc in MTRR code
  [PATCH] x86-64: Fix numaq build error
  [PATCH] x86-64: include/asm-x86_64/cpufeature.h isn't a userspace header
  [PATCH] unwinder: Add debugging output to the Dwarf2 unwinder
  [PATCH] x86-64: Clarify error message in GART code
  [PATCH] x86-64: Fix interrupt race in idle callback (3rd try)
  [PATCH] x86-64: Remove unwind stack pointer alignment forcing again
  ...

Fixed conflict in include/linux/uaccess.h manually

Signed-off-by: Linus Torvalds <[email protected]>

Documentation/i386/boot.txt

@@ -2,7 +2,7 @@
 		     ----------------------------
 
 		    H. Peter Anvin <[email protected]>
-			Last update 2005-09-02
+			Last update 2006-11-17
 
 On the i386 platform, the Linux kernel uses a rather complicated boot
 convention.  This has evolved partially due to historical aspects, as
@@ -35,6 +35,8 @@ Protocol 2.03:	(Kernel 2.4.18-pre1) Explicitly makes the highest possible
 		initrd address available to the bootloader.
 
 Protocol 2.04:	(Kernel 2.6.14) Extend the syssize field to four bytes.
+Protocol 2.05:	(Kernel 2.6.20) Make protected mode kernel relocatable.
+		Introduce relocatable_kernel and kernel_alignment fields.
 
 
 **** MEMORY LAYOUT
@@ -129,6 +131,8 @@ Offset	Proto	Name		Meaning
 0226/2	N/A	pad1		Unused
 0228/4	2.02+	cmd_line_ptr	32-bit pointer to the kernel command line
 022C/4	2.03+	initrd_addr_max	Highest legal initrd address
+0230/4	2.05+	kernel_alignment Physical addr alignment required for kernel
+0234/1	2.05+	relocatable_kernel Whether kernel is relocatable or not
 
 (1) For backwards compatibility, if the setup_sects field contains 0, the
     real value is 4.

Documentation/kernel-parameters.txt

@@ -599,8 +599,6 @@ and is between 256 and 4096 characters. It is defined in the file
 
 	hugepages=	[HW,IA-32,IA-64] Maximal number of HugeTLB pages.
 
-	noirqbalance	[IA-32,SMP,KNL] Disable kernel irq balancing
-
 	i8042.direct	[HW] Put keyboard port into non-translated mode
 	i8042.dumbkbd	[HW] Pretend that controller can only read data from
 			     keyboard and cannot control its state
@@ -1065,9 +1063,14 @@ and is between 256 and 4096 characters. It is defined in the file
 			in certain environments such as networked servers or
 			real-time systems.
 
+	noirqbalance	[IA-32,SMP,KNL] Disable kernel irq balancing
+
 	noirqdebug	[IA-32] Disables the code which attempts to detect and
 			disable unhandled interrupt sources.
 
+	no_timer_check	[IA-32,X86_64,APIC] Disables the code which tests for
+			broken timer IRQ sources.
+
 	noisapnp	[ISAPNP] Disables ISA PnP code.
 
 	noinitrd	[RAM] Tells the kernel not to load any configured
@@ -1752,6 +1755,9 @@ and is between 256 and 4096 characters. It is defined in the file
 	norandmaps	Don't use address space randomization
 			Equivalent to echo 0 > /proc/sys/kernel/randomize_va_space
 
+ 	unwind_debug=N 	N > 0 will enable dwarf2 unwinder debugging
+			This is useful to get more information why
+			you got a "dwarf2 unwinder stuck"
 
 ______________________________________________________________________
 

Documentation/stable_api_nonsense.txt

@@ -62,9 +62,6 @@ consider the following facts about the Linux kernel:
       - different structures can contain different fields
       - Some functions may not be implemented at all, (i.e. some locks
 	compile away to nothing for non-SMP builds.)
-      - Parameter passing of variables from function to function can be
-	done in different ways (the CONFIG_REGPARM option controls
-	this.)
       - Memory within the kernel can be aligned in different ways,
 	depending on the build options.
   - Linux runs on a wide range of different processor architectures.

Documentation/sysctl/kernel.txt

@@ -27,6 +27,7 @@ show up in /proc/sys/kernel:
 - hotplug
 - java-appletviewer           [ binfmt_java, obsolete ]
 - java-interpreter            [ binfmt_java, obsolete ]
+- kstack_depth_to_print       [ X86 only ]
 - l2cr                        [ PPC only ]
 - modprobe                    ==> Documentation/kmod.txt
 - msgmax
@@ -170,6 +171,13 @@ This flag controls the L2 cache of G3 processor boards. If
 
 ==============================================================
 
+kstack_depth_to_print: (X86 only)
+
+Controls the number of words to print when dumping the raw
+kernel stack.
+
+==============================================================
+
 osrelease, ostype & version:
 
 # cat osrelease

Documentation/x86_64/boot-options.txt

@@ -52,10 +52,6 @@ APICs
 		 apicmaintimer. Useful when your PIT timer is totally
 		 broken.
 
-   disable_8254_timer / enable_8254_timer
-		 Enable interrupt 0 timer routing over the 8254 in addition to over
-	         the IO-APIC. The kernel tries to set a sensible default.
-
 Early Console
 
    syntax: earlyprintk=vga
@@ -183,7 +179,7 @@ PCI
 IOMMU
 
  iommu=[size][,noagp][,off][,force][,noforce][,leak][,memaper[=order]][,merge]
-         [,forcesac][,fullflush][,nomerge][,noaperture]
+         [,forcesac][,fullflush][,nomerge][,noaperture][,calgary]
    size  set size of iommu (in bytes)
    noagp don't initialize the AGP driver and use full aperture.
    off   don't use the IOMMU
@@ -204,6 +200,7 @@ IOMMU
 	    buffering.
    nodac    Forbid DMA >4GB
    panic    Always panic when IOMMU overflows
+   calgary  Use the Calgary IOMMU if it is available
 
   swiotlb=pages[,force]
 

arch/h8300/kernel/vmlinux.lds.S

@@ -70,6 +70,7 @@ SECTIONS
 #endif
         .text :
 	{
+	_text = .;
 #if defined(CONFIG_ROMKERNEL)
 	*(.int_redirect)
 #endif

arch/i386/Kconfig

@@ -182,6 +182,17 @@ config X86_ES7000
 
 endchoice
 
+config PARAVIRT
+	bool "Paravirtualization support (EXPERIMENTAL)"
+	depends on EXPERIMENTAL
+	help
+	  Paravirtualization is a way of running multiple instances of
+	  Linux on the same machine, under a hypervisor.  This option
+	  changes the kernel so it can modify itself when it is run
+	  under a hypervisor, improving performance significantly.
+	  However, when run without a hypervisor the kernel is
+	  theoretically slower.  If in doubt, say N.
+
 config ACPI_SRAT
 	bool
 	default y
@@ -443,7 +454,8 @@ source "drivers/firmware/Kconfig"
 
 choice
 	prompt "High Memory Support"
-	default NOHIGHMEM
+	default HIGHMEM4G if !X86_NUMAQ
+	default HIGHMEM64G if X86_NUMAQ
 
 config NOHIGHMEM
 	bool "off"
@@ -710,20 +722,6 @@ config BOOT_IOREMAP
 	depends on (((X86_SUMMIT || X86_GENERICARCH) && NUMA) || (X86 && EFI))
 	default y
 
-config REGPARM
-	bool "Use register arguments"
-	default y
-	help
-	Compile the kernel with -mregparm=3. This instructs gcc to use
-	a more efficient function call ABI which passes the first three
-	arguments of a function call via registers, which results in denser
-	and faster code.
-
-	If this option is disabled, then the default ABI of passing
-	arguments via the stack is used.
-
-	If unsure, say Y.
-
 config SECCOMP
 	bool "Enable seccomp to safely compute untrusted bytecode"
 	depends on PROC_FS
@@ -773,23 +771,39 @@ config CRASH_DUMP
           PHYSICAL_START.
 	  For more details see Documentation/kdump/kdump.txt
 
-config PHYSICAL_START
-	hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP)
+config RELOCATABLE
+	bool "Build a relocatable kernel(EXPERIMENTAL)"
+	depends on EXPERIMENTAL
+	help
+	  This build a kernel image that retains relocation information
+          so it can be loaded someplace besides the default 1MB.
+	  The relocations tend to the kernel binary about 10% larger,
+          but are discarded at runtime.
+
+	  One use is for the kexec on panic case where the recovery kernel
+          must live at a different physical address than the primary
+          kernel.
 
-	default "0x1000000" if CRASH_DUMP
+config PHYSICAL_ALIGN
+	hex "Alignment value to which kernel should be aligned"
 	default "0x100000"
+	range 0x2000 0x400000
 	help
-	  This gives the physical address where the kernel is loaded. Normally
-	  for regular kernels this value is 0x100000 (1MB). But in the case
-	  of kexec on panic the fail safe kernel needs to run at a different
-	  address than the panic-ed kernel. This option is used to set the load
-	  address for kernels used to capture crash dump on being kexec'ed
-	  after panic. The default value for crash dump kernels is
-	  0x1000000 (16MB). This can also be set based on the "X" value as
-	  specified in the "crashkernel=YM@XM" command line boot parameter
-	  passed to the panic-ed kernel. Typically this parameter is set as
-	  crashkernel=64M@16M. Please take a look at
-	  Documentation/kdump/kdump.txt for more details about crash dumps.
+	  This value puts the alignment restrictions on physical address
+ 	  where kernel is loaded and run from. Kernel is compiled for an
+ 	  address which meets above alignment restriction.
+
+ 	  If bootloader loads the kernel at a non-aligned address and
+ 	  CONFIG_RELOCATABLE is set, kernel will move itself to nearest
+ 	  address aligned to above value and run from there.
+
+ 	  If bootloader loads the kernel at a non-aligned address and
+ 	  CONFIG_RELOCATABLE is not set, kernel will ignore the run time
+ 	  load address and decompress itself to the address it has been
+ 	  compiled for and run from there. The address for which kernel is
+ 	  compiled already meets above alignment restrictions. Hence the
+ 	  end result is that kernel runs from a physical address meeting
+	  above alignment restrictions.
 
 	  Don't change this unless you know what you are doing.
 

arch/i386/Kconfig.cpu

@@ -103,8 +103,15 @@ config MPENTIUMM
 	  Select this for Intel Pentium M (not Pentium-4 M)
 	  notebook chips.
 
+config MCORE2
+	bool "Core 2/newer Xeon"
+	help
+	  Select this for Intel Core 2 and newer Core 2 Xeons (Xeon 51xx and 53xx)
+	  CPUs. You can distingush newer from older Xeons by the CPU family
+	  in /proc/cpuinfo. Newer ones have 6.
+
 config MPENTIUM4
-	bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/Xeon"
+	bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/older Xeon"
 	help
 	  Select this for Intel Pentium 4 chips.  This includes the
 	  Pentium 4, P4-based Celeron and Xeon, and Pentium-4 M
@@ -229,7 +236,7 @@ config X86_L1_CACHE_SHIFT
 	default "7" if MPENTIUM4 || X86_GENERIC
 	default "4" if X86_ELAN || M486 || M386 || MGEODEGX1
 	default "5" if MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
-	default "6" if MK7 || MK8 || MPENTIUMM
+	default "6" if MK7 || MK8 || MPENTIUMM || MCORE2
 
 config RWSEM_GENERIC_SPINLOCK
 	bool
@@ -287,17 +294,17 @@ config X86_ALIGNMENT_16
 
 config X86_GOOD_APIC
 	bool
-	depends on MK7 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || MK8 || MEFFICEON
+	depends on MK7 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || MK8 || MEFFICEON || MCORE2
 	default y
 
 config X86_INTEL_USERCOPY
 	bool
-	depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON
+	depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON || MCORE2
 	default y
 
 config X86_USE_PPRO_CHECKSUM
 	bool
-	depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON || MGEODE_LX
+	depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON || MGEODE_LX || MCORE2
 	default y
 
 config X86_USE_3DNOW
@@ -312,5 +319,5 @@ config X86_OOSTORE
 
 config X86_TSC
 	bool
-	depends on (MWINCHIP3D || MWINCHIP2 || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MGEODEGX1 || MGEODE_LX) && !X86_NUMAQ
+	depends on (MWINCHIP3D || MWINCHIP2 || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MGEODEGX1 || MGEODE_LX || MCORE2) && !X86_NUMAQ
 	default y

arch/i386/Kconfig.debug

@@ -85,4 +85,14 @@ config DOUBLEFAULT
           option saves about 4k and might cause you much additional grey
           hair.
 
+config DEBUG_PARAVIRT
+	bool "Enable some paravirtualization debugging"
+	default y
+	depends on PARAVIRT && DEBUG_KERNEL
+	help
+	  Currently deliberately clobbers regs which are allowed to be
+	  clobbered in inlined paravirt hooks, even in native mode.
+	  If turning this off solves a problem, then DISABLE_INTERRUPTS() or
+	  ENABLE_INTERRUPTS() is lying about what registers can be clobbered.
+
 endmenu

arch/i386/Makefile

@@ -26,19 +26,19 @@ endif
 
 LDFLAGS		:= -m elf_i386
 OBJCOPYFLAGS	:= -O binary -R .note -R .comment -S
-LDFLAGS_vmlinux :=
+ifdef CONFIG_RELOCATABLE
+LDFLAGS_vmlinux := --emit-relocs
+endif
 CHECKFLAGS	+= -D__i386__
 
-CFLAGS += -pipe -msoft-float
+CFLAGS += -pipe -msoft-float -mregparm=3
 
 # prevent gcc from keeping the stack 16 byte aligned
 CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
 
 # CPU-specific tuning. Anything which can be shared with UML should go here.
 include $(srctree)/arch/i386/Makefile.cpu
 
-cflags-$(CONFIG_REGPARM) += -mregparm=3
-
 # temporary until string.h is fixed
 cflags-y += -ffreestanding
 

arch/i386/Makefile.cpu

@@ -32,6 +32,7 @@ cflags-$(CONFIG_MWINCHIP2)	+= $(call cc-option,-march=winchip2,-march=i586)
 cflags-$(CONFIG_MWINCHIP3D)	+= $(call cc-option,-march=winchip2,-march=i586)
 cflags-$(CONFIG_MCYRIXIII)	+= $(call cc-option,-march=c3,-march=i486) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
 cflags-$(CONFIG_MVIAC3_2)	+= $(call cc-option,-march=c3-2,-march=i686)
+cflags-$(CONFIG_MCORE2)		+= -march=i686 $(call cc-option,-mtune=core2,$(call cc-option,-mtune=generic,-mtune=i686))
 
 # AMD Elan support
 cflags-$(CONFIG_X86_ELAN)	+= -march=i486

arch/i386/boot/compressed/Makefile

@@ -4,22 +4,42 @@
 # create a compressed vmlinux image from the original vmlinux
 #
 
-targets		:= vmlinux vmlinux.bin vmlinux.bin.gz head.o misc.o piggy.o
+targets		:= vmlinux vmlinux.bin vmlinux.bin.gz head.o misc.o piggy.o \
+			vmlinux.bin.all vmlinux.relocs
 EXTRA_AFLAGS	:= -traditional
 
-LDFLAGS_vmlinux := -Ttext $(IMAGE_OFFSET) -e startup_32
+LDFLAGS_vmlinux := -T
+CFLAGS_misc.o += -fPIC
+hostprogs-y	:= relocs
 
-$(obj)/vmlinux: $(obj)/head.o $(obj)/misc.o $(obj)/piggy.o FORCE
+$(obj)/vmlinux: $(src)/vmlinux.lds $(obj)/head.o $(obj)/misc.o $(obj)/piggy.o FORCE
 	$(call if_changed,ld)
 	@:
 
 $(obj)/vmlinux.bin: vmlinux FORCE
 	$(call if_changed,objcopy)
 
+quiet_cmd_relocs = RELOCS  $@
+      cmd_relocs = $(obj)/relocs $< > $@;$(obj)/relocs --abs-relocs $<
+$(obj)/vmlinux.relocs: vmlinux $(obj)/relocs FORCE
+	$(call if_changed,relocs)
+
+vmlinux.bin.all-y := $(obj)/vmlinux.bin
+vmlinux.bin.all-$(CONFIG_RELOCATABLE) += $(obj)/vmlinux.relocs
+quiet_cmd_relocbin = BUILD   $@
+      cmd_relocbin = cat $(filter-out FORCE,$^) > $@
+$(obj)/vmlinux.bin.all: $(vmlinux.bin.all-y) FORCE
+	$(call if_changed,relocbin)
+
+ifdef CONFIG_RELOCATABLE
+$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin.all FORCE
+	$(call if_changed,gzip)
+else
 $(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
 	$(call if_changed,gzip)
+endif
 
 LDFLAGS_piggy.o := -r --format binary --oformat elf32-i386 -T
 
-$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.gz FORCE
+$(obj)/piggy.o: $(src)/vmlinux.scr $(obj)/vmlinux.bin.gz FORCE
 	$(call if_changed,ld)