Commit Graph

1694 Commits

Author SHA1 Message Date
Christoph Hellwig
96b8936a9e remove __ARCH_WANT_COMPAT_SYS_PTRACE
All architectures now use the generic compat_sys_ptrace, as should every
new architecture that needs 32bit compat (if we'll ever get another).

Remove the now superflous __ARCH_WANT_COMPAT_SYS_PTRACE define, and also
kill a comment about __ARCH_SYS_PTRACE that was added after
__ARCH_SYS_PTRACE was already gone.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-30 11:00:15 -08:00
Al Viro
d3a307f32e sn_pci_controller_fixup() should be __init
called only from __init

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-30 10:03:38 -08:00
Isaku Yamahata
0090d481ee [IA64] xen: fix xen_get_eflags.
fix xen_get_eflags. It doesn't take any argument.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-11-20 13:43:01 -08:00
Isaku Yamahata
93fe10b670 [IA64] ia64/pv_ops/pv_cpu_ops: fix _IA64_REG_IP case.
pv_cpu_ops.getreg(_IA64_REG_IP) returned constant.
But the returned ip valued should be the one in the caller, not of the callee.
This patch fixes that.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-11-20 13:41:20 -08:00
Huang Weiyi
d596410776 [IA64] remove duplicate include iommu.h
arch/ia64/kernel/pci-dma.c only needs to include iommu once.

Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-11-20 13:38:16 -08:00
Hidetoshi Seto
ef23cdbefc [IA64] use mprintk instead of printk, in ia64_mca_modify_original_stack
Using printk from MCA/INIT context is unsafe since it can cause deadlock.
The ia64_mca_modify_original_stack is called from both of mca handler and
init handler, so it should use mprintk instead of printk.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-11-20 13:31:10 -08:00
Tony Luck
b704882e70 [IA64] Rationalize kernel mode alignment checking
Itanium processors can handle some misaligned data accesses. They
also provide a mode where all such accesses are forced to trap. The
kernel was schizophrenic about use of this mode:

* Base kernel code ran in permissive mode where the only traps
  generated were from those cases that the h/w could not handle.
* Interrupt, syscall and trap code ran in strict mode where all
  unaligned accesses caused traps to the 0x5a00 unaligned reference
  vector.

Use strict alignment checking throughout the kernel, but make
sure that we continue to let user mode use more relaxed mode
as the default.

Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-11-20 13:27:12 -08:00
Xiantao Zhang
c60ff51eb2 KVM: ia64: fix vmm_spin_{un}lock for !CONFIG_SMP
In the case of !CONFIG_SMP, raw_spinlock_t is empty and the spinlock functions
don't build.  Fix by defining spinlock functions for the uniprocessor case.

Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-11-11 21:01:30 +02:00
Avi Kivity
ca93e992fd KVM: Require the PCI subsystem
PCI device assignment makes calls to pci code, so require it to be built
into the kernel.

Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-11-11 20:56:13 +02:00
Xiantao Zhang
a2e4e28946 KVM: ia64: Use guest signal mask when blocking
Before a vcpu blocks, it should switch to the guest signal mask to allow
signals to unblock it.

Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-11-11 20:53:34 +02:00
Jay Lan
17c1f07ed7 [IA64] Reserve elfcorehdr memory in CONFIG_CRASH_DUMP
IA64 kdump kernel failed to initialize /proc/vmcore in 2.6.28-rc2.
A bug was introduced in this patch commit:

  d9a9855d0b
  always reserve elfcore header memory in crash kernel

The problem was that the call to reserve_elfcorehdr() should be placed
in CONFIG_CRASH_DUMP rather than in CONFIG_CRASH_KERNEL, which does
not exist.

Signed-off-by: Jay Lan <jlan@sgi.com>
Acked-by: Simon Hormon <horms@verge.net.au>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-11-07 09:51:55 -08:00
Doug Chapman
62ee0540f5 [IA64] fix boot panic caused by offline CPUs
This fixes a regression introduced by 2c6e6db41f
"Minimize per_cpu reservations."  That patch incorrectly used information about
what CPUs are possible that was not yet initialized by ACPI.  The end result
was that per_cpu structures for offline CPUs were not initialized causing a
NULL pointer reference.

Since we cannot do the full acpi_boot_init() call any earlier, the simplest
fix is to just parse the MADT for SAPIC entries early to find the CPU
info.  This should also allow for some cleanup of the code added by the
"Minimize per_cpu reservations".  This patch just fixes the regressions, the
cleanup will come in a later patch.

Signed-off-by: Doug Chapman <doug.chapman@hp.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
CC: Robin Holt <holt@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-11-06 09:28:27 -08:00
Bjorn Helgaas
1547a01226 [IA64] reorder Kconfig options to match x86
No functional change, just reorder some config options and update
the "Power management and ACPI" label to match the defacto x86
standard.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-11-06 09:24:43 -08:00
Tony Luck
f2b3fdc887 [IA64] Build VT-D iommu support into generic kernel
Now that all the ia64 mmu pieces are in the tree we can build
support into the generic kernel.

Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-11-04 11:32:15 -08:00
FUJITA Tomonori
d8d54b0252 [IA64] remove dead BIO_VMERGE_BOUNDARY definition
The block layer dropped the virtual merge feature
(b8b3e16cfe). BIO_VMERGE_BOUNDARY
definition is meaningless now (For IA64, BIO_VMERGE_BOUNDARY has been
meaningless for a long time since IA64 disables the virtual merge
feature).

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-11-04 11:31:58 -08:00
Huang Weiyi
6a2d26fd3f [IA64] remove duplicated #include from pci-dma.c
Removed duplicated #include <asm/machvec.h> and <linux/string.h> in
arch/ia64/kernel/pci-dma.c.

Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-11-04 11:31:42 -08:00
Joerg Roedel
9979aa7778 [IA64] use common header for software IO/TLB
Remove the swiotlb prototypes from the architecture code and use the
common header file instead.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-11-04 11:31:29 -08:00
Ken'ichi Ohmichi
aca14f3310 [IA64] fix the difference between node_mem_map and node_start_pfn
makedumpfile[1] cannot run on ia64 discontigmem kernel, because the member
node_mem_map of struct pgdat_list has invalid value.  This patch fixes it.

node_start_pfn shows the start pfn of each node, and node_mem_map should
point 'struct page' of each node's node_start_pfn.  On my machine, node0's
node_start_pfn shows 0x400 and its node_mem_map points 0xa0007fffbf000000.
 This address is the same as vmem_map, so the node_mem_map points 'struct
page' of pfn 0, even if its node_start_pfn shows 0x400.

The cause is due to the round down of min_pfn in count_node_pages() and
node0's node_mem_map points 'struct page' of inactive pfn (0x0).  This
patch fixes it.

makedumpfile[1]: dump filtering command
https://sourceforge.net/projects/makedumpfile/

Signed-off-by: Ken'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp>
Cc: Bernhard Walle <bwalle@suse.de>
Cc: Jay Lan <jlan@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-11-04 11:31:12 -08:00
Russ Anderson
d6e15199d1 [IA64] Add error_recovery_info field to SAL section header
Add the error_recovery_info field to the SAL section header,
as defined in the SAL Spec.

Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-11-04 11:30:43 -08:00
Russ Anderson
7576f68449 [IA64] Add UV watchlist support.
This is used by SGI xp drivers (drivers/misc/sgi-xp).

Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-11-04 11:30:23 -08:00
Russ Anderson
9ac8d3fb22 [IA64] Simplify SGI uv vs. sn2 driver issues
Add partition id, coherence id, and region size to UV to
make life simpler for drivers shared between sn2 & uv.

Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-11-04 11:29:39 -08:00
Al Viro
233e70f422 saner FASYNC handling on file close
As it is, all instances of ->release() for files that have ->fasync()
need to remember to evict file from fasync lists; forgetting that
creates a hole and we actually have a bunch that *does* forget.

So let's keep our lives simple - let __fput() check FASYNC in
file->f_flags and call ->fasync() there if it's been set.  And lose that
crap in ->release() instances - leaving it there is still valid, but we
don't have to bother anymore.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-01 09:49:46 -07:00
Linus Torvalds
d6c3112abe Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
  x86/PCI: build failure at x86/kernel/pci-dma.c with !CONFIG_PCI
2008-10-30 12:09:44 -07:00
Xiantao Zhang
e45948b071 KVM: ia64: Makefile fix for forcing to re-generate asm-offsets.h
To avoid using stale asm-offsets.h.

Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-10-28 14:22:16 +02:00
Xiantao Zhang
decc90162a KVM: ia64: Fix halt emulation logic
Common halt logic was changed by x86 and did not update ia64.  This patch
updates halt for ia64.

Fixes a regression causing guests to hang with more than 2 vcpus.

Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-10-28 14:22:14 +02:00
Sheng Yang
5550af4df1 KVM: Fix guest shared interrupt with in-kernel irqchip
Every call of kvm_set_irq() should offer an irq_source_id, which is
allocated by kvm_request_irq_source_id(). Based on irq_source_id, we
identify the irq source and implement logical OR for shared level
interrupts.

The allocated irq_source_id can be freed by kvm_free_irq_source_id().

Currently, we support at most sizeof(unsigned long) different irq sources.

[Amit: - rebase to kvm.git HEAD
       - move definition of KVM_USERSPACE_IRQ_SOURCE_ID to common file
       - move kvm_request_irq_source_id to the update_irq ioctl]

[Xiantao: - Add kvm/ia64 stuff and make it work for kvm/ia64 guests]

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-10-28 14:21:34 +02:00
Fenghua Yu
3b15e58198 x86/PCI: build failure at x86/kernel/pci-dma.c with !CONFIG_PCI
On Thu, Oct 23, 2008 at 04:09:52PM -0700, Alexander Beregalov wrote:
> arch/x86/kernel/built-in.o: In function `iommu_setup':
> pci-dma.c:(.init.text+0x36ad): undefined reference to `forbid_dac'
> pci-dma.c:(.init.text+0x36cc): undefined reference to `forbid_dac'
> pci-dma.c:(.init.text+0x3711): undefined reference to `forbid_dac

This patch partially reverts a patch to add IOMMU support to ia64.  The
forbid_dac variable was incorrectly moved to quirks.c, which isn't built
when PCI is disabled.

Tested-by: "Alexander Beregalov" <a.beregalov@gmail.com>
Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2008-10-24 11:09:43 -07:00
Linus Torvalds
1f6d6e8ebe Merge branch 'v28-range-hrtimers-for-linus-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'v28-range-hrtimers-for-linus-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (37 commits)
  hrtimers: add missing docbook comments to struct hrtimer
  hrtimers: simplify hrtimer_peek_ahead_timers()
  hrtimers: fix docbook comments
  DECLARE_PER_CPU needs linux/percpu.h
  hrtimers: fix typo
  rangetimers: fix the bug reported by Ingo for real
  rangetimer: fix BUG_ON reported by Ingo
  rangetimer: fix x86 build failure for the !HRTIMERS case
  select: fix alpha OSF wrapper
  select: fix alpha OSF wrapper
  hrtimer: peek at the timer queue just before going idle
  hrtimer: make the futex() system call use the per process slack value
  hrtimer: make the nanosleep() syscall use the per process slack
  hrtimer: fix signed/unsigned bug in slack estimator
  hrtimer: show the timer ranges in /proc/timer_list
  hrtimer: incorporate feedback from Peter Zijlstra
  hrtimer: add a hrtimer_start_range() function
  hrtimer: another build fix
  hrtimer: fix build bug found by Ingo
  hrtimer: make select() and poll() use the hrtimer range feature
  ...
2008-10-23 10:53:02 -07:00
Linus Torvalds
5b34653963 Merge branch 'x86/um-header' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86/um-header' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (26 commits)
  x86: canonicalize remaining header guards
  x86: drop double underscores from header guards
  x86: Fix ASM_X86__ header guards
  x86, um: get rid of uml-config.h
  x86, um: get rid of arch/um/Kconfig.arch
  x86, um: get rid of arch/um/os symlink
  x86, um: get rid of excessive includes of uml-config.h
  x86, um: get rid of header symlinks
  x86, um: merge Kconfig.i386 and Kconfig.x86_64
  x86, um: get rid of sysdep symlink
  x86, um: trim the junk from uml ptrace-*.h
  x86, um: take vm-flags.h to sysdep
  x86, um: get rid of uml asm/arch
  x86, um: get rid of uml highmem.h
  x86, um: get rid of uml unistd.h
  x86, um: get rid of system.h -> system.h include
  x86, um: uml atomic.h is not needed anymore
  x86, um: untangle uml ldt.h
  x86, um: get rid of more uml asm/arch uses
  x86, um: remove dead header (uml module-generic.h; never used these days)
  ...
2008-10-23 10:22:01 -07:00
Linus Torvalds
765426e8ee Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (123 commits)
  dock: make dock driver not a module
  ACPI: fix ia64 build warning
  ACPI: hack around sysfs warning with link order
  ACPI suspend: fix build warning when CONFIG_ACPI_SLEEP=n
  intel_menlo: fix build warning
  panasonic-laptop: fix build
  ACPICA: Update version to 20080926
  ACPICA: Add support for zero-length buffer-to-string conversions
  ACPICA: New: Validation for predefined ACPI methods/objects
  ACPICA: Fix for implicit return compatibility
  ACPICA: Fixed a couple memory leaks associated with "implicit return"
  ACPICA: Optimize buffer allocation procedure
  ACPICA: Fix possible memory leak, error exit path
  ACPICA: Fix fault after mem allocation failure in AML parser
  ACPICA: Remove unused ACPI register bit definition
  ACPICA: Update version to 20080829
  ACPICA: Fix possible memory leak in acpi_ns_get_external_pathname
  ACPICA: Cleanup for internal Reference Object
  ACPICA: Update comments - no functional changes
  ACPICA: Update for Reference ACPI_OPERAND_OBJECT
  ...
2008-10-23 10:20:36 -07:00
Linus Torvalds
92fb83afd6 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile: (21 commits)
  OProfile: Fix buffer synchronization for IBS
  oprofile: hotplug cpu fix
  oprofile: fixing whitespaces in arch/x86/oprofile/*
  oprofile: fixing whitespaces in arch/x86/oprofile/*
  oprofile: fixing whitespaces in drivers/oprofile/*
  x86/oprofile: add the logic for enabling additional IBS bits
  x86/oprofile: reordering functions in nmi_int.c
  x86/oprofile: removing unused function parameter in add_ibs_begin()
  oprofile: more whitespace fixes
  oprofile: whitespace fixes
  OProfile: Rename IBS sysfs dir into "ibs_op"
  OProfile: Rework string handling in setup_ibs_files()
  OProfile: Rework oprofile_add_ibs_sample() function
  oprofile: discover counters for op ppro too
  oprofile: Implement Intel architectural perfmon support
  oprofile: Don't report Nehalem as core_2
  oprofile: drop const in num counters field
  Revert "Oprofile Multiplexing Patch"
  x86, oprofile: BUG: using smp_processor_id() in preemptible code
  x86/oprofile: fix on_each_cpu build error
  ...

Manually fixed trivial conflicts in
	drivers/oprofile/{cpu_buffer.c,event_buffer.h}
2008-10-23 10:05:40 -07:00
Linus Torvalds
72441bdc76 Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: (41 commits)
  [IA64] Fix annoying IA64_TR_ALLOC_MAX message.
  [IA64] kill sys32_pipe
  [IA64] remove sys32_pause
  [IA64] Add Variable Page Size and IA64 Support in Intel IOMMU
  ia64/pv_ops: paravirtualized instruction checker.
  ia64/xen: a recipe for using xen/ia64 with pv_ops.
  ia64/pv_ops: update Kconfig for paravirtualized guest and xen.
  ia64/xen: preliminary support for save/restore.
  ia64/xen: define xen machine vector for domU.
  ia64/pv_ops/xen: implement xen pv_time_ops.
  ia64/pv_ops/xen: implement xen pv_irq_ops.
  ia64/pv_ops/xen: define the nubmer of irqs which xen needs.
  ia64/pv_ops/xen: implement xen pv_iosapic_ops.
  ia64/pv_ops/xen: paravirtualize entry.S for ia64/xen.
  ia64/pv_ops/xen: paravirtualize ivt.S for xen.
  ia64/pv_ops/xen: paravirtualize DO_SAVE_MIN for xen.
  ia64/pv_ops/xen: define xen paravirtualized instructions for hand written assembly code
  ia64/pv_ops/xen: define xen pv_cpu_ops.
  ia64/pv_ops/xen: define xen pv_init_ops for various xen initialization.
  ia64/pv_ops/xen: elf note based xen startup.
  ...
2008-10-23 08:07:35 -07:00
Al Viro
bb8985586b x86, um: ... and asm-x86 move
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-10-22 22:55:20 -07:00
Len Brown
3262a8f2bf ACPI: fix ia64 build warning
arch/ia64/sn/kernel/io_acpi_init.c:361: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 3 has type ‘long long unsigned int’

Signed-off-by: Len Brown <len.brown@intel.com>
2008-10-23 01:47:29 -04:00
Len Brown
057316cc6a Merge branch 'linus' into test
Conflicts:
	MAINTAINERS
	arch/x86/kernel/acpi/boot.c
	arch/x86/kernel/acpi/sleep.c
	drivers/acpi/Kconfig
	drivers/pnp/Makefile
	drivers/pnp/quirks.c

Signed-off-by: Len Brown <len.brown@intel.com>
2008-10-23 00:11:07 -04:00
Thomas Gleixner
268a3dcfea Merge branch 'timers/range-hrtimers' into v28-range-hrtimers-for-linus-v2
Conflicts:

	kernel/time/tick-sched.c

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-10-22 09:48:06 +02:00
Benjamin Herrenschmidt
f19aeb1f36 PCI: Add ability to mmap legacy_io on some platforms
This adds the ability to mmap legacy IO space to the legacy_io files
in sysfs on platforms that support it. This will allow to clean up
X to use this instead of /dev/mem for legacy IO accesses such as
those performed by Int10.

While at it I moved pci_create/remove_legacy_files() to pci-sysfs.c
where I think they belong, thus making more things statis in there
and cleaned up some spurrious prototypes in the ia64 pci.h file

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2008-10-20 11:01:46 -07:00
Simon Horman
d9a9855d0b always reserve elfcore header memory in crash kernel
elfcore header memory needs to be reserved in a crash kernel.  This means
that the relevant code should be protected by CONFIG_CRASH_DUMP rather
than CONFIG_PROC_VMCORE.

Signed-off-by: Simon Horman <horms@verge.net.au>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-20 08:52:40 -07:00
Simon Horman
85a0ee342e kdump: add is_vmcore_usable() and vmcore_unusable()
The usage of elfcorehdr_addr has changed recently such that being set to
ELFCORE_ADDR_MAX is used by is_kdump_kernel() to indicate if the code is
executing in a kernel executed as a crash kernel.

However, arch/ia64/kernel/setup.c:reserve_elfcorehdr will rest
elfcorehdr_addr to ELFCORE_ADDR_MAX on error, which means any subsequent
calls to is_kdump_kernel() will return 0, even though they should return
1.

Ok, at this point in time there are no subsequent calls, but I think its
fair to say that there is ample scope for error or at the very least
confusion.

This patch add an extra state, ELFCORE_ADDR_ERR, which indicates that
elfcorehdr_addr was passed on the command line, and thus execution is
taking place in a crashdump kernel, but vmcore can't be used for some
reason.  This is tested for using is_vmcore_usable() and set using
vmcore_unusable().  A subsequent patch makes use of this new code.

To summarise, the states that elfcorehdr_addr can now be in are as follows:

ELFCORE_ADDR_MAX: not a crashdump kernel
ELFCORE_ADDR_ERR: crashdump kernel but vmcore is unusable
any other value:  crash dump kernel and vmcore is usable

Signed-off-by: Simon Horman <horms@verge.net.au>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-20 08:52:40 -07:00
Simon Horman
630bf20747 kdump: use is_kdump_kernel() in sba_init()
o Make use of is_kdump_kernel() rather than checking elfcorehdr_addr directly.

o Remove CONFIG_CRASH_DUMP as is_kdump_kernel() is safe to call anywhere

o Remove CONFIG_PROC_FS as it is bogus, the check
  should occur regardless of if CONFIG_PROC_FS is set or not.

Signed-off-by: Simon Horman <horms@verge.net.au>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-20 08:52:40 -07:00
Vivek Goyal
57cac4d188 kdump: make elfcorehdr_addr independent of CONFIG_PROC_VMCORE
o elfcorehdr_addr is used by not only the code under CONFIG_PROC_VMCORE
  but also by the code which is not inside CONFIG_PROC_VMCORE.  For
  example, is_kdump_kernel() is used by powerpc code to determine if
  kernel is booting after a panic then use previous kernel's TCE table.
  So even if CONFIG_PROC_VMCORE is not set in second kernel, one should be
  able to correctly determine that we are booting after a panic and setup
  calgary iommu accordingly.

o So remove the assumption that elfcorehdr_addr is under
  CONFIG_PROC_VMCORE.

o Move definition of elfcorehdr_addr to arch dependent crash files.
  (Unfortunately crash dump does not have an arch independent file
  otherwise that would have been the best place).

o kexec.c is not the right place as one can Have CRASH_DUMP enabled in
  second kernel without KEXEC being enabled.

o I don't see sh setup code parsing the command line for
  elfcorehdr_addr.  I am wondering how does vmcore interface work on sh.
  Anyway, I am atleast defining elfcoredhr_addr so that compilation is not
  broken on sh.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Simon Horman <horms@verge.net.au>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-20 08:52:39 -07:00
Matt Helsley
dc52ddc0e6 container freezer: implement freezer cgroup subsystem
This patch implements a new freezer subsystem in the control groups
framework.  It provides a way to stop and resume execution of all tasks in
a cgroup by writing in the cgroup filesystem.

The freezer subsystem in the container filesystem defines a file named
freezer.state.  Writing "FROZEN" to the state file will freeze all tasks
in the cgroup.  Subsequently writing "RUNNING" will unfreeze the tasks in
the cgroup.  Reading will return the current state.

* Examples of usage :

   # mkdir /containers/freezer
   # mount -t cgroup -ofreezer freezer  /containers
   # mkdir /containers/0
   # echo $some_pid > /containers/0/tasks

to get status of the freezer subsystem :

   # cat /containers/0/freezer.state
   RUNNING

to freeze all tasks in the container :

   # echo FROZEN > /containers/0/freezer.state
   # cat /containers/0/freezer.state
   FREEZING
   # cat /containers/0/freezer.state
   FROZEN

to unfreeze all tasks in the container :

   # echo RUNNING > /containers/0/freezer.state
   # cat /containers/0/freezer.state
   RUNNING

This is the basic mechanism which should do the right thing for user space
task in a simple scenario.

It's important to note that freezing can be incomplete.  In that case we
return EBUSY.  This means that some tasks in the cgroup are busy doing
something that prevents us from completely freezing the cgroup at this
time.  After EBUSY, the cgroup will remain partially frozen -- reflected
by freezer.state reporting "FREEZING" when read.  The state will remain
"FREEZING" until one of these things happens:

	1) Userspace cancels the freezing operation by writing "RUNNING" to
		the freezer.state file
	2) Userspace retries the freezing operation by writing "FROZEN" to
		the freezer.state file (writing "FREEZING" is not legal
		and returns EIO)
	3) The tasks that blocked the cgroup from entering the "FROZEN"
		state disappear from the cgroup's set of tasks.

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: export thaw_process]
Signed-off-by: Cedric Le Goater <clg@fr.ibm.com>
Signed-off-by: Matt Helsley <matthltc@us.ibm.com>
Acked-by: Serge E. Hallyn <serue@us.ibm.com>
Tested-by: Matt Helsley <matthltc@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-20 08:52:34 -07:00
Badari Pulavarty
71088785c6 mm: cleanup to make remove_memory() arch-neutral
There is nothing architecture specific about remove_memory().
remove_memory() function is common for all architectures which support
hotplug memory remove.  Instead of duplicating it in every architecture,
collapse them into arch neutral function.

[akpm@linux-foundation.org: fix the export]
Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: Gary Hade <garyhade@us.ibm.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-20 08:50:25 -07:00
Tony Luck
fe393164c5 Pull vtd-iommu into release branch
Conflicts:
	arch/ia64/kernel/acpi.c
2008-10-17 13:52:22 -07:00
Tony Luck
22ca532a4d Pull pv_ops-xen into release branch 2008-10-17 13:51:28 -07:00
Tony Luck
9224652cc7 Pull utrace into release branch 2008-10-17 13:51:16 -07:00
Tony Luck
4d4230c27f Pull compat into release branch 2008-10-17 13:51:01 -07:00
Tony Luck
a9894a4a3c [IA64] Fix annoying IA64_TR_ALLOC_MAX message.
Madison cpus support 64 TR registers.  Increase IA64_TR_ALLOC_MAX
to 64.  Also fixup the messages that get printed when this limit
is exceeded.  Repeating for every cpu is too noisy.

Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-10-17 13:47:53 -07:00
Christoph Hellwig
0f32dc9dc2 [IA64] kill sys32_pipe
It's just a duplicate of the generic sys_pipe that still lacks the
recently added error handling.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-10-17 12:44:26 -07:00
Christoph Hellwig
9f3541ed2c [IA64] remove sys32_pause
It's just a duplicate of the native sys_pause, which we can use after
defining __ARCH_WANT_SYS_PAUSE.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-10-17 12:38:20 -07:00