12 years agox86_32: select_idle_routine() must be __cpuinit
Adrian Bunk [Wed, 19 Dec 2007 22:20:18 +0000]
x86_32: select_idle_routine() must be __cpuinit

CONFIG_HOTPLUG_CPU=y:

WARNING: vmlinux.o(.text+0x1199a): Section mismatch: reference to .init.text.5:select_idle_routine (between 'init_intel' and 'init_nexgen')

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

12 years agox86 smpboot_32.c section fixes
Adrian Bunk [Wed, 19 Dec 2007 22:20:18 +0000]
x86 smpboot_32.c section fixes

CONFIG_HOTPLUG_CPU=y:

WARNING: vmlinux.o(.text+0x22c60): Section mismatch: reference to .init.data:cpu_idle_tasks (between 'do_boot_cpu' and 'do_warm_boot_cpu')
WARNING: vmlinux.o(.text+0x22c99): Section mismatch: reference to .init.data:cpu_idle_tasks (between 'do_boot_cpu' and 'do_warm_boot_cpu')
WARNING: vmlinux.o(.text+0x2359b): Section mismatch: reference to .init.data:smp_b_stepping (between 'smp_store_cpu_info' and 'cpu_exit_clear')
WARNING: vmlinux.o(.text+0x235a0): Section mismatch: reference to .init.data:smp_b_stepping (between 'smp_store_cpu_info' and 'cpu_exit_clear')

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

12 years agox86 apic_32.c section fix
Adrian Bunk [Wed, 19 Dec 2007 22:20:18 +0000]
x86 apic_32.c section fix

CONFIG_HOTPLUG_CPU=y:

WARNING: vmlinux.o(.text+0x2390d): Section mismatch: reference to .init.text.5:setup_local_APIC (between 'start_secondary' and 'check_tsc_warp')

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

12 years agoMerge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
Linus Torvalds [Wed, 19 Dec 2007 22:29:23 +0000]
Merge branch 'release' of git://git./linux/kernel/git/aegl/linux-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
  [IA64] Adjust CMCI mask on CPU hotplug
  [IA64] make flush_tlb_kernel_range() an inline function
  [IA64] Guard elfcorehdr_addr with #if CONFIG_PROC_FS
  [IA64] Fix Altix BTE error return status
  [IA64] Remove assembler warnings on head.S
  [IA64] Remove compiler warinings about uninitialized variable in irq_ia64.c
  [IA64] set_thread_area fails in IA32 chroot
  [IA64] print kernel release in OOPS to make kerneloops.org happy
  [IA64] Two trivial spelling fixes
  [IA64] Avoid unnecessary TLB flushes when allocating memory
  [IA64] ia32 nopage
  [IA64] signal: remove redundant code in setup_sigcontext()
  IA64: Slim down __clear_bit_unlock

12 years agopata_hpt37x: Fix HPT374 detection
Alan Cox [Wed, 19 Dec 2007 17:50:32 +0000]
pata_hpt37x: Fix HPT374 detection

Bug #9261

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agops3fb: Fix ps3fb free_irq() dev_id
Geoff Levand [Wed, 19 Dec 2007 10:17:31 +0000]
ps3fb: Fix ps3fb free_irq() dev_id

The dev_id arg passed to free_irq() must match that passed to
request_irq().

Fixes this PS3 error message:

  Trying to free already-free IRQ 44

Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agops3fb: Update for firmware 2.10
Geert Uytterhoeven [Wed, 19 Dec 2007 10:16:41 +0000]
ps3fb: Update for firmware 2.10

ps3fb: Update for firmware 2.10

As of PS3 firmware version 2.10, the GPU command buffer size must be at least 2
MiB large. Since we use only a small part of the GPU command buffer and don't
want to waste precious XDR memory, move the GPU command buffer back to the
start of the XDR memory reserved for ps3fb and let the unused part overlap with
the actual frame buffer.

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6
Linus Torvalds [Wed, 19 Dec 2007 22:25:56 +0000]
Merge git://git./linux/kernel/git/jejb/scsi-rc-fixes-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6:
  [SCSI] initio: bugfix for accessors patch
  [SCSI] st: fix kernel BUG at include/linux/scatterlist.h:59!
  [SCSI] initio: fix conflict when loading driver
  [SCSI] sym53c8xx: fix "irq X: nobody cared" regression
  [SCSI] dpt_i2o: driver is only 32 bit so don't set 64 bit DMA mask
  [SCSI] sym53c8xx: fix free_irq() regression

12 years agoDo dirty page accounting when removing a page from the page cache
Linus Torvalds [Wed, 19 Dec 2007 22:05:13 +0000]
Do dirty page accounting when removing a page from the page cache

Krzysztof Oledzki noticed a dirty page accounting leak on some of his
machines, causing the machine to eventually lock up when the kernel
decided that there was too much dirty data, but nobody could actually
write anything out to fix it.

The culprit turns out to be filesystems (cough ext3 with data=journal
cough) that re-dirty the page when the "->invalidatepage()" callback is
called.

Fix it up by doing a final dirty page accounting check when we actually
remove the page from the page cache.

This fixes bugzilla entry 9182:

http://bugzilla.kernel.org/show_bug.cgi?id=9182

Tested-by: Ingo Molnar <mingo@elte.hu>
Tested-by: Krzysztof Oledzki <olel@ans.pl>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years ago[IA64] Adjust CMCI mask on CPU hotplug
Hidetoshi Seto [Wed, 19 Dec 2007 19:42:02 +0000]
[IA64] Adjust CMCI mask on CPU hotplug

Currently CMCI mask of hot-added CPU is always disabled after CPU hotplug.
We should adjust this mask depending on CMC polling state.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

12 years ago[IA64] make flush_tlb_kernel_range() an inline function
Jan Beulich [Wed, 19 Dec 2007 20:30:30 +0000]
[IA64] make flush_tlb_kernel_range() an inline function

This fixes an unused variable warning in mm/vmalloc.c.

Tony: also fix resulting fallout in uncached.c with a
typo in args to flush_tlb_kernel_range().

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

12 years ago[IA64] Guard elfcorehdr_addr with #if CONFIG_PROC_FS
Simon Horman [Mon, 12 Nov 2007 04:55:21 +0000]
[IA64] Guard elfcorehdr_addr with #if CONFIG_PROC_FS

Access to elfcorehdr_addr needs to be guarded by #if CONFIG_PROC_FS
as well as the existing #if guards.

Fixes the following build problem:

arch/ia64/hp/common/built-in.o: In function
`sba_init':arch/ia64/hp/common/sba_iommu.c:2043: undefined reference to `elfcorehdr_addr'
:arch/ia64/hp/common/sba_iommu.c:2043: undefined reference to `elfcorehdr_addr'

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Tony Luck <tony.luck@intel.com>

12 years ago[IA64] Fix Altix BTE error return status
Russ Anderson [Tue, 21 Aug 2007 21:45:12 +0000]
[IA64] Fix Altix BTE error return status

The Altix shub2 BTE error detail bits are in a different location
than on shub1.  The current code does not take this into account
resulting in all shub2 BTE failures mapping to "unknown".

This patch reads the error detail bits from the proper location,
so the correct BTE failure reason is returned for both shub1
and shub2.

Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

12 years ago[IA64] Remove assembler warnings on head.S
Hidetoshi Seto [Wed, 12 Dec 2007 07:28:52 +0000]
[IA64] Remove assembler warnings on head.S

This patch removes the following assembler warning messages.

  AS      arch/ia64/kernel/head.o
arch/ia64/kernel/head.S: Assembler messages:
arch/ia64/kernel/head.S:1179: Warning: Use of 'ld8' violates RAW dependency 'CR[PTA]' (data)
arch/ia64/kernel/head.S:1179: Warning: Only the first path encountering the conflict is reported
arch/ia64/kernel/head.S:1178: Warning: This is the location of the conflicting usage
arch/ia64/kernel/head.S:1180: Warning: Use of 'ld8' violates RAW dependency 'CR[PTA]' (data)
arch/ia64/kernel/head.S:1180: Warning: Only the first path encountering the conflict is reported
arch/ia64/kernel/head.S:1178: Warning: This is the location of the conflicting usage
 :
arch/ia64/kernel/head.S:1213: Warning: Use of 'ldf.fill.nta' violates RAW dependency 'CR[PTA]' (data)
arch/ia64/kernel/head.S:1213: Warning: Only the first path encountering the conflict is reported
arch/ia64/kernel/head.S:1178: Warning: This is the location of the conflicting usage

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

12 years ago[IA64] Remove compiler warinings about uninitialized variable in irq_ia64.c
Kenji Kaneshige [Wed, 22 Aug 2007 10:28:36 +0000]
[IA64] Remove compiler warinings about uninitialized variable in irq_ia64.c

This patch removes the following compiler warning messages.

CC arch/ia64/kernel/irq_ia64.o
arch/ia64/kernel/irq_ia64.c: In function 'create_irq':
arch/ia64/kernel/irq_ia64.c:343: warning: 'domain.bits[0u]' may be used uninitialized in this function
arch/ia64/kernel/irq_ia64.c: In function 'assign_irq_vector':
arch/ia64/kernel/irq_ia64.c:203: warning: 'domain.bits[0u]' may be used uninitialized in this function

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

12 years ago[IA64] set_thread_area fails in IA32 chroot
Ian Wienand [Tue, 20 Nov 2007 03:12:46 +0000]
[IA64] set_thread_area fails in IA32 chroot

I tried to upgrade an IA32 chroot on my IA64 to a new glibc with TLS.
It kept dying because set_thread_area was returning -ESRCH
(bugs.debian.org/451939).

I instrumented arch/ia64/ia32/sys_ia32.c:get_free_idx() and ended up
seeing output like

[pid] idx   desc->a  desc->b
-----------------------------
[2710] 0 -> c6b0ffff 40dff31b
[2710] 1 -> 0 0
[2710] 2 -> 0 0

[2710] 0 -> c6b0ffff 40dff31b
[2710] 1 -> c6b0ffff 40dff31b
[2710] 2 -> 0 0

[2711] 0 -> c6b0ffff 40dff31b
[2711] 1 -> c6b0ffff 40dff31b
[2711] 2 -> 48c0ffff 40dff317

which suggested to me that TLS pointers were surviving exec() calls,
leading to GDT pointers filling up and the eventual failure of
get_free_idx().

I think the solution is flushing the tls array on exec.

Signed-Off-By: Ian Wienand <ianw@gelato.unsw.edu.au>
Signed-off-by: Tony Luck <tony.luck@intel.com>

12 years ago[IA64] print kernel release in OOPS to make kerneloops.org happy
Luck, Tony [Tue, 18 Dec 2007 19:46:38 +0000]
[IA64] print kernel release in OOPS to make kerneloops.org happy

The ia64 oops message doesn't include the kernel version, which
makes it hard to automatically categorize oops messages scraped
from mailing lists and bug databases.

Signed-off-by: Tony Luck <tony.luck@intel.com>

12 years ago[IA64] Two trivial spelling fixes
Joe Perches [Wed, 19 Dec 2007 01:02:21 +0000]
[IA64] Two trivial spelling fixes

s/addres/address/
s/performanc/performance/

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

12 years ago[IA64] Avoid unnecessary TLB flushes when allocating memory
de Dinechin, Christophe (Integrity VM) [Thu, 13 Dec 2007 15:03:07 +0000]
[IA64] Avoid unnecessary TLB flushes when allocating memory

Improve performance of memory allocations on ia64 by avoiding a global TLB
purge to purge a single page from the file cache. This happens whenever we
evict a page from the buffer cache to make room for some other allocation.

Test case: Run 'find /usr -type f | xargs cat > /dev/null' in the
background to fill the buffer cache, then run something that uses memory,
e.g. 'gmake -j50 install'. Instrumentation showed that the number of
global TLB purges went from a few millions down to about 170 over a 12
hours run of the above.

The performance impact is particularly noticeable under virtualization,
because a virtual TLB is generally both larger and slower to purge than
a physical one.

Signed-off-by: Christophe de Dinechin <ddd@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

12 years ago[IA64] ia32 nopage
Nick Piggin [Thu, 13 Dec 2007 23:58:27 +0000]
[IA64] ia32 nopage

Convert ia64's ia32 support from nopage to fault.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>

12 years ago[IA64] signal: remove redundant code in setup_sigcontext()
Shi Weihua [Thu, 13 Dec 2007 23:58:26 +0000]
[IA64] signal: remove redundant code in setup_sigcontext()

This patch removes some redundant code in the function setup_sigcontext().

The registers ar.ccv,b7,r14,ar.csd,ar.ssd,r2-r3 and r16-r31 are not
restored in restore_sigcontext() when (flags & IA64_SC_FLAG_IN_SYSCALL) is
true.  So we don't need to zero those variables in setup_sigcontext().

Signed-off-by: Shi Weihua <shiwh@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>

12 years agoIA64: Slim down __clear_bit_unlock
Christoph Lameter [Wed, 19 Dec 2007 00:22:46 +0000]
IA64: Slim down __clear_bit_unlock

__clear_bit_unlock does not need to perform atomic operations on the
variable.  Avoid a cmpxchg and simply do a store with release semantics.
Add a barrier to be safe that the compiler does not do funky things.

Tony: Use intrinsic rather than inline assembler

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Acked-by: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>

12 years ago[SCSI] initio: bugfix for accessors patch
Boaz Harrosh [Mon, 17 Dec 2007 16:08:59 +0000]
[SCSI] initio: bugfix for accessors patch

patch: [SCSI] initio: convert to use the data buffer accessors had a
small but fatal bug in that it didn't increment the pointer into the
initio scatterlist descriptors as it looped over the block generated
ones. Fixed here.

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

12 years ago[SCSI] st: fix kernel BUG at include/linux/scatterlist.h:59!
FUJITA Tomonori [Sat, 15 Dec 2007 06:51:55 +0000]
[SCSI] st: fix kernel BUG at include/linux/scatterlist.h:59!

This is caused by a missing scatterlist initialisation (it only shows
up when sg list handling debugging is turned on).

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Kai Makisara <Kai.Makisara@kolumbus.fi>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

12 years ago[SCSI] initio: fix conflict when loading driver
Alan Cox [Fri, 14 Dec 2007 00:14:05 +0000]
[SCSI] initio: fix conflict when loading driver

> I have a scanner connected to a Initio INI-950 SCSI card and I recently
> upgraded from SuSE 10.2 to 10.3.  The new kernel doesn't see any of my
> devices.  I get the following in /var/log/messages:
>
> ACPI: PCI Interrupt 0000:00:0a.0[A] -> GSI 17 (level, low) -> IRQ 16
> initio: I/O port range 0x0 is busy.
> ACPI: PCI interrupt for device 0000:00:0a.0 disabled

Humm not a collision - thats a bug in the driver updating.  Looks like the
changes I made and combined with Christoph's lost a line somewhere when I
was merging it all.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

12 years ago[SCSI] sym53c8xx: fix "irq X: nobody cared" regression
Tony Battersby [Fri, 14 Dec 2007 20:45:16 +0000]
[SCSI] sym53c8xx: fix "irq X: nobody cared" regression

The patch described by the following excerpt from ChangeLog-2.6.24-rc1
eventually causes a "irq X: nobody cared" error after a while:

commit 99c9e0a1d6cfe1ba1169a7a81435ee85bc00e4a1
Author: Matthew Wilcox <matthew@wil.cx>
Date:   Fri Oct 5 15:55:12 2007 -0400

    [SCSI] sym53c8xx: Make interrupt handler capable of returning IRQ_NONE

After this happens, the kernel disables the IRQ, causing the SCSI card
to stop working until the next reboot.  The problem is caused by the
interrupt handler returning IRQ_NONE instead of IRQ_HANDLED after
handling an interrupt-on-the-fly (INTF) condition.  The following patch
fixes the problem.

Signed-off-by: Tony Battersby <tonyb@cybernetics.com>
Acked-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

12 years ago[SCSI] dpt_i2o: driver is only 32 bit so don't set 64 bit DMA mask
James Bottomley [Wed, 12 Dec 2007 20:06:21 +0000]
[SCSI] dpt_i2o: driver is only 32 bit so don't set 64 bit DMA mask

This fixes a potential corruption bug where the truncation would cause
reading or writing to the wrong memory area on machines with >4GB of
main memory.

Cc: Stable Kernel Tree <stable@kernel.org>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

12 years ago[SCSI] sym53c8xx: fix free_irq() regression
Tony Battersby [Tue, 6 Nov 2007 19:40:54 +0000]
[SCSI] sym53c8xx: fix free_irq() regression

The following commit changed the pointer passed to request_irq(), but
failed to change the pointer passed to free_irq():

commit 99c9e0a1d6cfe1ba1169a7a81435ee85bc00e4a1
Author: Matthew Wilcox <matthew@wil.cx>
Date:   Fri Oct 5 15:55:12 2007 -0400

    [SCSI] sym53c8xx: Make interrupt handler capable of returning IRQ_NONE

    ...

The result is that free_irq() doesn't actually take any action.  This
patch fixes it.

Signed-off-by: Tony Battersby <tonyb@cybernetics.com>
Acked-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

12 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86
Linus Torvalds [Tue, 18 Dec 2007 17:42:44 +0000]
Merge git://git./linux/kernel/git/x86/linux-2.6-x86

* git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86:
  x86: fix "Kernel panic - not syncing: IO-APIC + timer doesn't work!"
  genirq: revert lazy irq disable for simple irqs
  x86: also define AT_VECTOR_SIZE_ARCH
  x86: kprobes bugfix
  x86: jprobe bugfix
  timer: kernel/timer.c section fixes
  genirq: add unlocked version of set_irq_handler()
  clockevents: fix reprogramming decision in oneshot broadcast
  oprofile: op_model_athlon.c support for AMD family 10h barcelona performance counters

12 years agox86: fix "Kernel panic - not syncing: IO-APIC + timer doesn't work!"
Ingo Molnar [Tue, 18 Dec 2007 17:05:58 +0000]
x86: fix "Kernel panic - not syncing: IO-APIC + timer doesn't work!"

this is the tale of a full day spent debugging an ancient but elusive bug.

after booting up thousands of random .config kernels, i finally happened
to generate a .config that produced the following rare bootup failure
on 32-bit x86:

| ..TIMER: vector=0x31 apic1=0 pin1=2 apic2=-1 pin2=-1
| ..MP-BIOS bug: 8254 timer not connected to IO-APIC
| ...trying to set up timer (IRQ0) through the 8259A ...  failed.
| ...trying to set up timer as Virtual Wire IRQ... failed.
| ...trying to set up timer as ExtINT IRQ... failed :(.
| Kernel panic - not syncing: IO-APIC + timer doesn't work!  Boot with apic=debug
| and send a report.  Then try booting with the 'noapic' option

this bug has been reported many times during the years, but it was never
reproduced nor fixed.

the bug that i hit was extremely sensitive to .config details.

First i did a .config-bisection - suspecting some .config detail.
That led to CONFIG_X86_MCE: enabling X86_MCE magically made the bug disappear
and the system would boot up just fine.

Debugging my way through the MCE code ended up identifying two unlikely
candidates: the thing that made a real difference to the hang was that
X86_MCE did two printks:

 Intel machine check architecture supported.
 Intel machine check reporting enabled on CPU#1.

Adding the same printks to a !CONFIG_X86_MCE kernel made the bug go away!

this left timing as the main suspect: i experimented with adding various
udelay()s to the arch/x86/kernel/io_apic_32.c:check_timer() function, and
the race window turned out to be narrower than 30 microseconds (!).

That made debugging especially funny, debugging without having printk
ability before the bug hits is ... interesting ;-)

eventually i started suspecting IRQ activities - those are pretty much the
only thing that happen this early during bootup and have the timescale of
a few dozen microseconds. Also, check_timer() changes the IRQ hardware
in various creative ways, so the main candidate became IRQ0 interaction.

i've added a counter to track timer irqs (on which core they arrived, at
what exact time, etc.) and found that no timer IRQ would arrive after the
bug condition hits - even if we re-enable IRQ0 and re-initialize the i8259A,
but that we'd get a small number of timer irqs right around the time when we
call the check_timer() function.

Eventually i got the following backtrace triggered from debug code in the
timer interrupt:

...trying to set up timer as Virtual Wire IRQ... failed.
...trying to set up timer as ExtINT IRQ...
Pid: 1, comm: swapper Not tainted (2.6.24-rc5 #57)
EIP: 0060:[<c044d57e>] EFLAGS: 00000246 CPU: 0
EIP is at _spin_unlock_irqrestore+0x5/0x1c
EAX: c0634178 EBX: 00000000 ECX: c4947d63 EDX: 00000246
ESI: 00000002 EDI: 00010031 EBP: c04e0f2e ESP: f7c41df4
 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
 CR0: 8005003b CR2: ffe04000 CR3: 00630000 CR4: 000006d0
 DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
 DR6: ffff0ff0 DR7: 00000400
  [<c05f5784>] setup_IO_APIC+0x9c3/0xc5c

the spin_unlock() was called from init_8259A(). Wait ... we have an IRQ0
entry while we are in the middle of setting up the local APIC, the i8259A
and the PIT??

That is certainly not how it's supposed to work! check_timer() was supposed
to be called with irqs turned off - but this eroded away sometime in the
past. This code would still work most of the time because this code runs
very quickly, but just the right timing conditions are present and IRQ0
hits in this small, ~30 usecs window, timer irqs stop and the system does
not boot up. Also, given how early this is during bootup, the hang is
very deterministic - but it would only occur on certain machines (and
certain configs).

The fix was quite simple: disable/restore interrupts properly in this
function. With that in place the test-system now boots up just fine.

(64-bit x86 io_apic_64.c had the same bug.)

Phew! One down, only 1500 other kernel bugs are left ;-)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

12 years agogenirq: revert lazy irq disable for simple irqs
Steven Rostedt [Tue, 18 Dec 2007 17:05:58 +0000]
genirq: revert lazy irq disable for simple irqs

In commit 76d2160147f43f982dfe881404cfde9fd0a9da21 lazy irq disabling
was implemented, and the simple irq handler had a masking set to it.

Remy Bohmer discovered that some devices in the ARM architecture
would trigger the mask, but never unmask it. His patch to do the
unmasking was questioned by Russell King about masking simple irqs
to begin with. Looking further, it was discovered that the problems
Remy was seeing was due to improper use of the simple handler by
devices, and he later submitted patches to fix those. But the issue
that was uncovered was that the simple handler should never mask.

This patch reverts the masking in the simple handler.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>

12 years agox86: also define AT_VECTOR_SIZE_ARCH
Jan Beulich [Tue, 18 Dec 2007 17:05:58 +0000]
x86: also define AT_VECTOR_SIZE_ARCH

The patch introducing this left out 64-bit x86 despite it also having
extra entries.

this solves Xen guest troubles.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

12 years agox86: kprobes bugfix
Masami Hiramatsu [Tue, 18 Dec 2007 17:05:58 +0000]
x86: kprobes bugfix

Kprobes for x86-64 may cause a kernel crash if it inserted on "iret"
instruction. "call absolute" is invalid on x86-64, so we don't need
treat it.

 - Change the processing order as same as x86-32.
 - Add "iret"(0xcf) case.
 - Remove next_rip local variable.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

12 years agox86: jprobe bugfix
Masami Hiramatsu [Tue, 18 Dec 2007 17:05:58 +0000]
x86: jprobe bugfix

jprobe for x86-64 may cause kernel page fault when the jprobe_return()
is called from incorrect function.

- Use jprobe_saved_regs instead getting it from stack.
  (Especially on x86-64, it may get incorrect data, because
   pt_regs can not be get by using container_of(rsp))
- Change the type of stack pointer to unsigned long *.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

12 years agotimer: kernel/timer.c section fixes
Adrian Bunk [Tue, 18 Dec 2007 17:05:58 +0000]
timer: kernel/timer.c section fixes

This patch fixes the following section mismatches with CONFIG_HOTPLUG=n,
CONFIG_HOTPLUG_CPU=y:

...
WARNING: vmlinux.o(.text+0x41cd3): Section mismatch: reference to .init.data:tvec_base_done.22610 (between 'timer_cpu_notify' and 'run_timer_softirq')
WARNING: vmlinux.o(.text+0x41d67): Section mismatch: reference to .init.data:tvec_base_done.22610 (between 'timer_cpu_notify' and 'run_timer_softirq')
...

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

12 years agogenirq: add unlocked version of set_irq_handler()
Kevin Hilman [Tue, 18 Dec 2007 17:05:58 +0000]
genirq: add unlocked version of set_irq_handler()

Add unlocked version for use by irq_chip.set_type handlers which may
wish to change handler to level or edge handler when IRQ type is
changed.

The normal set_irq_handler() call cannot be used because it tries to
take irq_desc.lock which is already held when the irq_chip.set_type
hook is called.

Signed-off-by: Kevin Hilman <khilman@mvista.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

12 years agoclockevents: fix reprogramming decision in oneshot broadcast
Thomas Gleixner [Tue, 18 Dec 2007 17:05:58 +0000]
clockevents: fix reprogramming decision in oneshot broadcast

Resolve the following regression of a choppy, almost unusable laptop:

 http://lkml.org/lkml/2007/12/7/299
 http://bugzilla.kernel.org/show_bug.cgi?id=9525

A previous version of the code did the reprogramming of the broadcast
device in the return from idle code. This was removed, but the logic in
tick_handle_oneshot_broadcast() was kept the same.

When a broadcast interrupt happens we signal the expiry to all CPUs
which have an expired event. If none of the CPUs has an expired event,
which can happen in dyntick mode, then we reprogram the broadcast
device. We do not reprogram otherwise, but this is only correct if all
CPUs, which are in the idle broadcast state have been woken up.

The code ignores, that there might be pending not yet expired events on
other CPUs, which are in the idle broadcast state. So the delivery of
those events can be delayed for quite a time.

Change the tick_handle_oneshot_broadcast() function to check for CPUs,
which are in broadcast state and are not woken up by the current event,
and enforce the rearming of the broadcast device for those CPUs.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

12 years agooprofile: op_model_athlon.c support for AMD family 10h barcelona performance counters
Barry Kasindorf [Tue, 18 Dec 2007 17:05:58 +0000]
oprofile: op_model_athlon.c support for AMD family 10h barcelona performance counters

This patch is for controlling the upper 32bits of the event ctrl msrs.
This includes the upper 4 bits of the event select and the Guest Only and
Host Only bits

This patch is necessary to make Event Based Profiling work reliably on a
Family 10h processor

[akpm@linux-foundation.org: checkpatch.pl fixes]

Signed-off-by: Barry Kasindorf <barry.kasindorf@amd.com>
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

12 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched
Linus Torvalds [Tue, 18 Dec 2007 16:11:01 +0000]
Merge git://git./linux/kernel/git/mingo/linux-2.6-sched

* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched:
  sched: do not hurt SCHED_BATCH on wakeup
  sched: touch softlockup watchdog after idling
  sched: sysctl, proc_dointvec_minmax() expects int values for
  sched: mark rwsem functions as __sched for wchan/profiling
  sched: fix crash on ia64, introduce task_current()

12 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
Linus Torvalds [Tue, 18 Dec 2007 16:04:24 +0000]
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block

* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  Cleanup umem driver: fix most checkpatch warnings, conform to kernel
  block: let elv_register() return void
  as-iosched: fix write batch start point
  as-iosched: fix incorrect comments
  block: use jiffies conversion functions in scsi_ioctl.c

12 years agoMerge branch 'for-linus' of git://oss.sgi.com:8090/xfs/xfs-2.6
Linus Torvalds [Tue, 18 Dec 2007 16:03:32 +0000]
Merge branch 'for-linus' of git://oss.sgi.com:8090/xfs/xfs-2.6

* 'for-linus' of git://oss.sgi.com:8090/xfs/xfs-2.6:
  [XFS] Put the correct offset in dirent d_off
  [XFS] Don't wait for pending I/Os when purging blocks beyond eof.

12 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc
Linus Torvalds [Tue, 18 Dec 2007 16:03:01 +0000]
Merge branch 'for-linus' of git://git./linux/kernel/git/drzeus/mmc

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc:
  mmc: remove unused 'mode' from the mmc_host structure
  sdhci: support JMicron JMB38x chips
  sdhci: use PIO when DMA can't satisfy the request
  sdhci: don't warn about sdhci 2.0 controllers
  sdhci: describe quirks

12 years agosched: do not hurt SCHED_BATCH on wakeup
Ingo Molnar [Tue, 18 Dec 2007 14:21:13 +0000]
sched: do not hurt SCHED_BATCH on wakeup

measurements by Yanmin Zhang have shown that SCHED_BATCH tasks benefit
if they run the same place_entity() logic as SCHED_OTHER tasks - so
uniformize behavior in this area.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

12 years agosched: touch softlockup watchdog after idling
Ingo Molnar [Tue, 18 Dec 2007 14:21:13 +0000]
sched: touch softlockup watchdog after idling

touch softlockup watchdog after idling.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

12 years agosched: sysctl, proc_dointvec_minmax() expects int values for
Eric Dumazet [Tue, 18 Dec 2007 14:21:13 +0000]
sched: sysctl, proc_dointvec_minmax() expects int values for

min_sched_granularity_ns, max_sched_granularity_ns,
min_wakeup_granularity_ns and max_wakeup_granularity_ns are declared
"unsigned long".

This is incorrect since proc_dointvec_minmax() expects plain "int" guard
values.

This bug only triggers on big endian 64 bit arches.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

12 years agosched: mark rwsem functions as __sched for wchan/profiling
Livio Soares [Tue, 18 Dec 2007 14:21:13 +0000]
sched: mark rwsem functions as __sched for wchan/profiling

This following commit

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=fdf8cb0909b531f9ae8f9b9d7e4eb35ba3505f07

un-inlined a low-level rwsem function, but did not mark it as __sched.
The result is that it now shows up as thread wchan (which also affects
/proc/profile stats).  The following simple patch fixes this by properly
marking rwsem_down_failed_common() as a __sched function.

Also in this patch, which is up for discussion, marks down_read() and
down_write() proper as __sched.  For profiling, it is pretty much
useless to know that a semaphore is beig help - it is necessary to know
_which_ one.  By going up another frame on the stack, the information
becomes much more useful.

In summary, the below change to lib/rwsem.c should be applied; the
changes to kernel/rwsem.c could be applied if other kernel hackers agree
with my proposal that down_read()/down_write() in the profile is not
enough.

[ akpm@linux-foundation.org: build fix ]

Signed-off-by: Livio Soares <livio@eecg.toronto.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

12 years agosched: fix crash on ia64, introduce task_current()
Dmitry Adamushko [Tue, 18 Dec 2007 14:21:13 +0000]
sched: fix crash on ia64, introduce task_current()

Some services (e.g. sched_setscheduler(), rt_mutex_setprio() and
sched_move_task()) must handle a given task differently in case it's the
'rq->curr' task on its run-queue. The task_running() interface is not
suitable for determining such tasks for platforms with one of the
following options:

#define __ARCH_WANT_UNLOCKED_CTXSW
#define __ARCH_WANT_INTERRUPTS_ON_CTXSW

Due to the fact that it makes use of 'p->oncpu == 1' as a criterion but
such a task is not necessarily 'rq->curr'.

The detailed explanation is available here:
https://lists.linux-foundation.org/pipermail/containers/2007-December/009262.html

Signed-off-by: Dmitry Adamushko <dmitry.adamushko@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Tested-by: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Tested-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>

12 years agoCleanup umem driver: fix most checkpatch warnings, conform to kernel
Randy Dunlap [Mon, 17 Dec 2007 19:24:20 +0000]
Cleanup umem driver: fix most checkpatch warnings, conform to kernel
coding style.

  linux-2.6.24-rc5-git3> checkpatch.pl-next  patches/block-umem-ckpatch.patch
  total: 0 errors, 5 warnings, 530 lines checked

All of these are line-length warnings.

Only change in generated object file is due to not initializing a
static global variable to 0.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

12 years agoblock: let elv_register() return void
Adrian Bunk [Wed, 12 Dec 2007 17:51:56 +0000]
block: let elv_register() return void

elv_register() always returns 0, and there isn't anything it does where
it should return an error (the only error condition is so grave that
it's handled with a BUG_ON).

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

12 years agoas-iosched: fix write batch start point
Aaron Carroll [Wed, 5 Dec 2007 10:07:07 +0000]
as-iosched: fix write batch start point

New write batches currently start from where the last one completed.
We have no idea where the head is after switching batches, so this
makes little sense.  Instead, start the next batch from the request
with the earliest deadline in the hope that we avoid a deadline
expiry later on.

Signed-off-by: Aaron Carroll <aaronc@gelato.unsw.edu.au>
Acked-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

12 years agoas-iosched: fix incorrect comments
Aaron Carroll [Wed, 5 Dec 2007 10:06:50 +0000]
as-iosched: fix incorrect comments

Two comments refer to deadlines applying to reads only.  This is
not the case.

Signed-off-by: Aaron Carroll <aaronc@gelato.unsw.edu.au>
Acked-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

12 years agoblock: use jiffies conversion functions in scsi_ioctl.c
Tejun Heo [Wed, 5 Dec 2007 20:28:24 +0000]
block: use jiffies conversion functions in scsi_ioctl.c

Use msecs_to_jiffies() and jiffies_to_msecs() in scsi_ioctl().
Sometimes callers use very large values for e.g. vendor specific media
clear command and calculation can overflow.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

12 years ago[XFS] Put the correct offset in dirent d_off
Lachlan McIlroy [Tue, 18 Dec 2007 05:19:34 +0000]
[XFS] Put the correct offset in dirent d_off

The recent filldir regression fix was not putting the correct d_off in
each dirent. This was resulting in incorrect cookies being passed to dmapi
ioctls and the wrong offset appearing in the dirents. readdir was
unaffected as the filp->f_pos was being updated with the correct offset
and this was being written into the last dirent in each buffer. Fix the
XFS code to do the right thing.

SGI-PV: 973746
SGI-Modid: xfs-linux-melb:xfs-kern:30240a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

12 years ago[XFS] Don't wait for pending I/Os when purging blocks beyond eof.
Lachlan McIlroy [Tue, 18 Dec 2007 05:17:41 +0000]
[XFS] Don't wait for pending I/Os when purging blocks beyond eof.

On last close of a file we purge blocks beyond eof. The same code is used
when we truncate the file size down. In this case we need to wait for any
pending I/Os for dirty pages beyond the new eof. For the last close case
we are not changing the file size and therefore do not need to wait for
any I/Os to complete. This fixes a performance bottleneck where writes
into the page cache and cache flushes can become mutually exclusive.

SGI-PV: 964002
SGI-Modid: xfs-linux-melb:xfs-kern:30220a

Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Peter Leckie <pleckie@sgi.com>

12 years agoMerge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzi...
Linus Torvalds [Tue, 18 Dec 2007 03:29:41 +0000]
Merge branch 'upstream-linus' of git://git./linux/kernel/git/jgarzik/netdev-2.6

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/netdev-2.6: (23 commits)
  iwlwifi: fix rf_kill state inconsistent during suspend and resume
  b43: Fix rfkill radio LED
  bcm43xx_debugfs sscanf fix
  libertas: select WIRELESS_EXT
  iwlwifi3945/4965: fix rate control algo reference leak
  ieee80211_rate: missed unlock
  wireless/ipw2200.c: add __dev{init,exit} annotations
  zd1211rw: Fix alignment problems
  libertas: add Dan Williams as maintainer
  sis190 endianness
  ucc_geth: really fix section mismatch
  pcnet_cs: add new id
  ixgb: make sure jumbos stay enabled after reset
  Net: ibm_newemac, remove SPIN_LOCK_UNLOCKED
  net: smc911x: shut up compiler warnings
  ucc_geth: minor whitespace fix
  drivers/net/s2io.c section fixes
  drivers/net/sis190.c section fix
  hamachi endianness fixes
  e100: free IRQ to remove warningwhenrebooting
  ...

12 years agoMerge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzi...
Linus Torvalds [Tue, 18 Dec 2007 03:29:32 +0000]
Merge branch 'upstream-linus' of git://git./linux/kernel/git/jgarzik/libata-dev

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  libata: fix ATAPI draining
  libata: update atapi_eh_request_sense() such that lbam/lbah contains buffer size
  libata-acpi: implement _GTF command filtering
  libata-acpi: improve _GTF execution error handling and reporting
  libata-acpi: improve ACPI disabling
  libata-acpi: implement dev->gtf_cache and evaluate _GTF right after _STM during resume
  libata-acpi: implement and use ata_acpi_init_gtm()
  libata-acpi: add new hooks ata_acpi_dissociate() and ata_acpi_on_disable()
  libata: ata_dev_disable() should be called from EH context
  libata: add more opcodes to ata.h
  libata: update ata_*_printk() macros such that level can be a variable
  libata-acpi: adjust constness in ata_acpi_gtm/stm() parameters
  sata_mv: improve warnings about Highpoint RocketRAID 23xx cards
  libata: add ST3160023AS / 3.42 to NCQ blacklist
  libata: clear link->eh_info.serror from ata_std_postreset()
  sata_sil: fix spurious IRQ handling

12 years agosysctl: fix ax25 checks
Eric W. Biederman [Tue, 18 Dec 2007 00:20:28 +0000]
sysctl: fix ax25 checks

Fix:

sysctl table check failed: /net/ax25/ax0/ax25_default_mode .3.9.1.2 Unknown
sysctl binary path
Pid: 2936, comm: kissattach Not tainted 2.6.24-rc5 #1
 [<c012ca6a>] set_fail+0x3b/0x43
 [<c012ce7a>] sysctl_check_table+0x408/0x456
 [<c012ce8e>] sysctl_check_table+0x41c/0x456
 [<c012ce8e>] sysctl_check_table+0x41c/0x456
 ...

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Bernard Pidoux <pidoux@ccr.jussieu.fr>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoquicklist: Set tlb->need_flush if pages are remaining in quicklist 0
Christoph Lameter [Tue, 18 Dec 2007 00:20:27 +0000]
quicklist: Set tlb->need_flush if pages are remaining in quicklist 0

This ensures that the quicklists are drained. Otherwise draining may only
occur when the processor reaches an idle state.

Fixes fatal leakage of pgd_t's on 2.6.22 and later.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Reported-by: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoSLUB: remove useless masking of GFP_ZERO
Christoph Lameter [Tue, 18 Dec 2007 00:20:27 +0000]
SLUB: remove useless masking of GFP_ZERO

Remove a recently added useless masking of GFP_ZERO.  GFP_ZERO is already
masked out in new_slab() (See how it calls allocate_slab).  No need to do
it twice.

This reverts the SLUB parts of 7fd272550bd43cc1d7289ef0ab2fa50de137e767.

Cc: Matt Mackall <mpm@selenic.com>
Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoFix compilation warning in dquot.c
Jan Kara [Tue, 18 Dec 2007 00:20:26 +0000]
Fix compilation warning in dquot.c

Fix compilation warning about discarded const.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoDocumentation: update hugetlb information
Nishanth Aravamudan [Tue, 18 Dec 2007 00:20:25 +0000]
Documentation: update hugetlb information

The hugetlb documentation has gotten a bit out of sync with the current code.
Updated the sysctl file to refer to Documentation/vm/hugetlbpage.txt.  Update
that file to contain the current state of affairs (with the newer named sysctl
in place).

Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Acked-by: Adam Litke <agl@us.ibm.com>
Cc: William Lee Irwin III <wli@holomorphy.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoRevert "hugetlb: Add hugetlb_dynamic_pool sysctl"
Nishanth Aravamudan [Tue, 18 Dec 2007 00:20:22 +0000]
Revert "hugetlb: Add hugetlb_dynamic_pool sysctl"

This reverts commit 54f9f80d6543fb7b157d3b11e2e7911dc1379790 ("hugetlb:
Add hugetlb_dynamic_pool sysctl")

Given the new sysctl nr_overcommit_hugepages, the boolean dynamic pool
sysctl is not needed, as its semantics can be expressed by 0 in the
overcommit sysctl (no dynamic pool) and non-0 in the overcommit sysctl
(pool enabled).

(Needed in 2.6.24 since it reverts a post-2.6.23 userspace-visible change)

Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Acked-by: Adam Litke <agl@us.ibm.com>
Cc: William Lee Irwin III <wli@holomorphy.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agohugetlb: introduce nr_overcommit_hugepages sysctl
Nishanth Aravamudan [Tue, 18 Dec 2007 00:20:12 +0000]
hugetlb: introduce nr_overcommit_hugepages sysctl

hugetlb: introduce nr_overcommit_hugepages sysctl

While examining the code to support /proc/sys/vm/hugetlb_dynamic_pool, I
became convinced that having a boolean sysctl was insufficient:

1) To support per-node control of hugepages, I have previously submitted
patches to add a sysfs attribute related to nr_hugepages. However, with
a boolean global value and per-mount quota enforcement constraining the
dynamic pool, adding corresponding control of the dynamic pool on a
per-node basis seems inconsistent to me.

2) Administration of the hugetlb dynamic pool with multiple hugetlbfs
mount points is, arguably, more arduous than it needs to be. Each quota
would need to be set separately, and the sum would need to be monitored.

To ease the administration, and to help make the way for per-node
control of the static & dynamic hugepage pool, I added a separate
sysctl, nr_overcommit_hugepages. This value serves as a high watermark
for the overall hugepage pool, while nr_hugepages serves as a low
watermark. The boolean sysctl can then be removed, as the condition

nr_overcommit_hugepages > 0

indicates the same administrative setting as

hugetlb_dynamic_pool == 1

Quotas still serve as local enforcement of the size of the pool on a
per-mount basis.

A few caveats:

1) There is a race whereby the global surplus huge page counter is
incremented before a hugepage has allocated. Another process could then
try grow the pool, and fail to convert a surplus huge page to a normal
huge page and instead allocate a fresh huge page. I believe this is
benign, as no memory is leaked (the actual pages are still tracked
correctly) and the counters won't go out of sync.

2) Shrinking the static pool while a surplus is in effect will allow the
number of surplus huge pages to exceed the overcommit value. As long as
this condition holds, however, no more surplus huge pages will be
allowed on the system until one of the two sysctls are increased
sufficiently, or the surplus huge pages go out of use and are freed.

Successfully tested on x86_64 with the current libhugetlbfs snapshot,
modified to use the new sysctl.

Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Acked-by: Adam Litke <agl@us.ibm.com>
Cc: William Lee Irwin III <wli@holomorphy.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoecryptfs: fix fsx data corruption problems
Eric Sandeen [Tue, 18 Dec 2007 00:20:10 +0000]
ecryptfs: fix fsx data corruption problems

ecryptfs in 2.6.24-rc3 wasn't surviving fsx for me at all, dying after 4
ops.  Generally, encountering problems with stale data and improperly
zeroed pages.  An extending truncate + write for example would expose stale
data.

With the changes below I got to a million ops and beyond with all mmap ops
disabled - mmap still needs work.  (A version of this patch on a RHEL5
kernel ran for over 110 million fsx ops)

I added a few comments as well, to the best of my understanding
as I read through the code.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Acked-by: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agofix bloat-o-meter for ppc64
Nathan Lynch [Tue, 18 Dec 2007 00:20:09 +0000]
fix bloat-o-meter for ppc64

bloat-o-meter assumes that a '.' anywhere in a symbol's name means that it
is static and prepends 'static.' to the first part of the symbol name,
discarding the portion of the name that follows the '.'.  However, the
names of function entry points begin with '.' in the ppc64 ABI.  This
causes all function text size changes to be accounted to a single 'static.'
entry in the output when comparing ppc64 kernels.

Change getsizes() to ignore the first character of the symbol name when
searching for '.'.

Signed-off-by: Nathan Lynch <ntl@pobox.com>
Cc: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoI/OAT: fix null device in call to dev_err()
Shannon Nelson [Tue, 18 Dec 2007 00:20:08 +0000]
I/OAT: fix null device in call to dev_err()

We can't use the device in a dev_err() after a kzalloc failure or after the
kfree, so simplify it to the pdev that was originally passed in.

Cc: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoI/OAT: fixups from code comments
Shannon Nelson [Tue, 18 Dec 2007 00:20:08 +0000]
I/OAT: fixups from code comments

A few fixups from Andrew's code comments.
  - removed "static inline" forward-declares
  - changed use of min() to min_t()
  - removed some unnecessary NULL initializations
  - removed a couple of BUG() calls

Fixes this:

drivers/dma/ioat_dma.c: In function `ioat1_tx_submit':
drivers/dma/ioat_dma.c:177: sorry, unimplemented: inlining failed in call to '__ioat1_dma_memcpy_issue_pending': function body not available
drivers/dma/ioat_dma.c:268: sorry, unimplemented: called from here

Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Cc: "Williams, Dan J" <dan.j.williams@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoecryptfs: set s_blocksize from lower fs in sb
Eric Sandeen [Tue, 18 Dec 2007 00:20:07 +0000]
ecryptfs: set s_blocksize from lower fs in sb

eCryptfs wasn't setting s_blocksize in it's superblock; just pick it up
from the lower FS.  Having an s_blocksize of 0 made things like "filefrag"
which call FIGETBSZ unhappy.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Acked-by: Mike Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agomm: fix page allocation for larger I/O segments
Mel Gorman [Tue, 18 Dec 2007 00:20:05 +0000]
mm: fix page allocation for larger I/O segments

In some cases the IO subsystem is able to merge requests if the pages are
adjacent in physical memory.  This was achieved in the allocator by having
expand() return pages in physically contiguous order in situations were a
large buddy was split.  However, list-based anti-fragmentation changed the
order pages were returned in to avoid searching in buffered_rmqueue() for a
page of the appropriate migrate type.

This patch restores behaviour of rmqueue_bulk() preserving the physical
order of pages returned by the allocator without incurring increased search
costs for anti-fragmentation.

Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Mark Lord <mlord@pobox.com
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoapm_event{,info}_t are userspace types
Adam Jackson [Tue, 18 Dec 2007 00:20:04 +0000]
apm_event{,info}_t are userspace types

These types define the size of data read from /dev/apm_bios.  They should
not be hidden behind #ifdef __KERNEL__.

This is killing my xserver compile, apm_event_t is used in the xserver
source.

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agodrivers/cpufreq/cpufreq_stats.c section fix
Adrian Bunk [Tue, 18 Dec 2007 00:20:03 +0000]
drivers/cpufreq/cpufreq_stats.c section fix

cpufreq_stats_free_table() mustn't be __cpuexit since it's called by the
__cpuinit cpufreq_stat_cpu_callback().

This patch fixes the following section mismatch reported by
Chris Clayton:

WARNING: vmlinux.o(.init.text+0x143dd): Section mismatch: reference to .exit.text:cpufreq_stats_free_table (between 'cpufreq_stat_cpu_callback' and 'cpufreq_stats_init')

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Cc: Chris Clayton <chris2553@googlemail.com>
Acked-by: Dave Jones <davej@codemonkey.org.uk>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agodrivers/macintosh/via-pmu.c: Added a missing iounmap
Julia Lawall [Tue, 18 Dec 2007 00:20:02 +0000]
drivers/macintosh/via-pmu.c: Added a missing iounmap

The error handling code should undo the ioremap as well.

The problem was detected using the following semantic match
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
type T,T1,T2;
identifier E;
statement S;
expression x1,x2;
constant C;
int ret;
@@

  T E;
  ...
* E = ioremap(...);
  if (E == NULL) S
  ... when != iounmap(E)
      when != if (E != NULL) { ... iounmap(E); ...}
      when != x1 = (T1)E
  if (...) {
    ... when != iounmap(E)
        when != if (E != NULL) { ... iounmap(E); ...}
        when != x2 = (T2)E
(
*   return;
|
*   return C;
|
*   return ret;
)
  }
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Olaf Hering <olaf@aepfle.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agopktcdvd: add kobject_put when kobject register fails
Dave Young [Tue, 18 Dec 2007 00:20:00 +0000]
pktcdvd: add kobject_put when kobject register fails

In kobject_register, the kobject reference is get in kobject_init, and then
kobject_add.  If kobject_add fail, it will only cleanup the reference got
by itself.

Signed-off-by: Dave Young <hidave.darkstar@gmail.com>
Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Greg KH <greg@kroah.com>
Cc: Peter Osterlund <petero2@telia.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agomm/sparse.c: improve the error handling for sparse_add_one_section()
WANG Cong [Tue, 18 Dec 2007 00:19:59 +0000]
mm/sparse.c: improve the error handling for sparse_add_one_section()

Improve the error handling for mm/sparse.c::sparse_add_one_section().  And I
see no reason to check 'usemap' until holding the 'pgdat_resize_lock'.

[geoffrey.levand@am.sony.com: sparse_index_init() returns -EEXIST]
Cc: Christoph Lameter <clameter@sgi.com>
Acked-by: Dave Hansen <haveblue@us.ibm.com>
Cc: Rik van Riel <riel@redhat.com>
Acked-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agomm/sparse.c: check the return value of sparse_index_alloc()
WANG Cong [Tue, 18 Dec 2007 00:19:58 +0000]
mm/sparse.c: check the return value of sparse_index_alloc()

Since sparse_index_alloc() can return NULL on memory allocation failure,
we must deal with the failure condition when calling it.

Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agocpufreq: fix missing unlocks in cpufreq_add_dev error paths.
Dave Jones [Tue, 18 Dec 2007 00:19:58 +0000]
cpufreq: fix missing unlocks in cpufreq_add_dev error paths.

Ingo hit some BUG_ONs that were probably caused by these missing unlocks
causing an unbalance.  He couldn't reproduce the bug reliably, so it's
unknown that it's definitly fixing the problem he hit, but it's a fairly
good chance, and this fixes an obvious bug.

[ Dave: "Ingo followed up that he hit some lockdep related output with
         this applied, so it may not be right.  I'll look at it after
         xmas if no-one has it figured out before then."
  Akpm: "It looks pretty correct to me though." ]

Signed-off-by: Dave Jones <davej@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoalpha: build fixes
Ivan Kokshaysky [Tue, 18 Dec 2007 00:19:57 +0000]
alpha: build fixes

This fixes some of the alpha-specific build problems, except a) modpost
warning about COMMON symbol "saved_config" and b) nasty final link
failure with gcc-4.x, -Os and scsi-disk driver configured built-in
(due to jump table in .rodata referencing discarded .exit.text).

- build failure with gcc-4.2.x: fix up casts in cia_io* routines to avoid
  warnings ('discards qualifiers from pointer target type'), which are
  failures, thanks to -Werror;
- modpost warnings: add missing __init qualifier for titan and marvel;
  for non-generic build, move machine vectors from .data to .data.init.refok
  section;
- unbreak CPU-specific optimization: rearrange cpuflags-y assignments
  so that extended -mcpu value (ev56, pca56, ev67) overrides basic
  one (ev5, ev6) and not vice versa.

Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoext3, ext4: avoid divide by zero
Andries E. Brouwer [Tue, 18 Dec 2007 00:19:55 +0000]
ext3, ext4: avoid divide by zero

As it turns out, the kernel divides by EXT3_INODES_PER_GROUP(s) when
mounting an ext3 filesystem.  If that number is zero, a crash follows.
Below a patch.

This crash was reported by Joeri de Ruiter, Carst Tankink and Pim Vullers.

Cc: <linux-ext4@vger.kernel.org>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agofs/Kconfig: grammar fix
Uwe Kleine-König [Tue, 18 Dec 2007 00:19:54 +0000]
fs/Kconfig: grammar fix

This was introduced in 4af8e944c22d8af92a7548354a9567250cc1a782

Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agosparsemem: make SPARSEMEM_VMEMMAP selectable
Geoff Levand [Tue, 18 Dec 2007 00:19:53 +0000]
sparsemem: make SPARSEMEM_VMEMMAP selectable

SPARSEMEM_VMEMMAP needs to be a selectable config option to support
building the kernel both with and without sparsemem vmemmap support.  This
selection is desirable for platforms which could be configured one way for
platform specific builds and the other for multi-platform builds.

Signed-off-by: Miguel Botón <mboton@gmail.com>
Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Acked-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoFix lguest documentation
Sheela [Tue, 18 Dec 2007 00:19:53 +0000]
Fix lguest documentation

Share net is not supported, Rusty is an "idiot" .

Signed-off-by: Sheela Sequeira <sheela.sequeira@gmail.com>
Reviewed-by: James Morris <jmorris@namei.org>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoecryptfs: initialize new auth_tokens before teardown
Eric Sandeen [Tue, 18 Dec 2007 00:19:52 +0000]
ecryptfs: initialize new auth_tokens before teardown

ecryptfs_destroy_mount_crypt_stat() checks whether each
auth_tok->global_auth_tok_key is nonzero and if so puts that key.  However,
in some early mount error paths nothing has initialized the pointer, and we
try to key_put() garbage.  Running the bad cipher tests in the testsuite
exposes this, and it's happy with the following change.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Cc: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoparport: "dev->timeslice" is an unsigned long, not an int
Eric Dumazet [Tue, 18 Dec 2007 00:19:51 +0000]
parport: "dev->timeslice" is an unsigned long, not an int

While auditing proc_doulongvec_ms_jiffies_minmax() usage in kernel, I found
a bug in drivers/parport/procfs.c, incorrectly using sizeof(int) instead of
sizeof(unsigned long)

Only 64bit arches are affected by this old bug.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agortc-at32ap700x: fix irq init oops
David Brownell [Tue, 18 Dec 2007 00:19:50 +0000]
rtc-at32ap700x: fix irq init oops

Reorder at32_rtc_probe() so that it's safe (no oopsing) to fire the
IRQ handler the instant that it's registered.  (Bug noted via "Debug
shared IRQ handlers" kernel debug option.)

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: <hcegtvedt@atmel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoalpha: strncpy/strncat fixes
Ivan Kokshaysky [Tue, 18 Dec 2007 00:19:48 +0000]
alpha: strncpy/strncat fixes

First of all, thanks to Bob Tracy <rct@frus.com> and
Michael Cree <mcree@orcon.net.nz> for testing.
Especially to Bob, as he has done titanic multi-day git-bisect
work that finally helped to reproduce and nail down the bug
(http://bugzilla.kernel.org/show_bug.cgi?id=9457).

[ev6-]stxncpy.S: it's t12, not t2 register that is supposed to contain
the last byte offset upon return. As a result of wrong register use
(which was my fault back in 2003, IIRC), under some circumstances extra
terminating zero bytes were added to destination string. This particularly
led to incorrect DEVPATH strings generated in uevent and therefore to udev
problems.

strncpy.S: unrelated bug I found while testing the above fix - destination
is not properly zero-padded then a byte count exceeds source length.
Actually this is addition to strncpy fix from last year.

Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Bob Tracy <rct@frus.com>
Cc: Michael Cree <mcree@orcon.net.nz>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agouml: stop gdb from deleting breakpoints when running UML
Stanislaw Gruszka [Tue, 18 Dec 2007 00:19:46 +0000]
uml: stop gdb from deleting breakpoints when running UML

Sometimes when UML is debugged gdb miss breakpoints.

When process traced by gdb do fork, debugger remove breakpoints from
child address space. There is possibility to trace more than one fork,
but this not work with UML, I guess (only guess) there is a deadlock -
gdb waits for UML and UML waits for gdb.

When clone() is called with SIGCHLD and CLONE_VM flags, gdb see this
as PTRACE_EVENT_FORK not as PTRACE_EVENT_CLONE and remove breakpoints
from child and at the same time from traced process, because either
have the same address space.

Maybe it is possible to do fix in gdb, but I'm not sure if there is
easy way to find out if traced and child processes share memory. So I
do fix for UML, it simply do not call clone() with both SIGCHLD and
CLONE_VM flags together.  Additionally __WALL flag is used for
waitpid() to assure not miss clone and normal process events.

[ jdike - checkpatch fixes ]

Signed-off-by: Stanislaw Gruszka <stf_xl@wp.pl>
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agorevert "Hibernation: Use temporary page tables for kernel text mapping on x86_64"
Andrew Morton [Tue, 18 Dec 2007 00:19:45 +0000]
revert "Hibernation: Use temporary page tables for kernel text mapping on x86_64"

Revert commit efa4d2fb047b25a6be67fe92178a2a78da6b3f6a ("Hibernation:
Use temporary page tables for kernel text mapping on x86_64") because it
causes my t61p to reboot right at the end of resume-from-disk.  For
reasons unknown at this time.

Cc: Pavel Machek <pavel@ucw.cz>
Cc: Andi Kleen <ak@suse.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Acked-by: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agofix headers_install
Andrew Morton [Tue, 18 Dec 2007 00:19:44 +0000]
fix headers_install

make[3]: *** No rule to make target `/usr/src/devel/include/linux/ticable.h', needed by `/usr/src/devel/usr/include/linux/ticable.h'.  Stop.

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agolibata: fix ATAPI draining
Tejun Heo [Wed, 12 Dec 2007 03:21:52 +0000]
libata: fix ATAPI draining

With ATAPI transfer chunk size properly programmed, libata PIO HSM
should be able to handle full spurious data chunks.  Also, it's a good
idea to suppress trailing data warning for misc ATAPI commands as
there can be many of them per command - for example, if the chunk size
is 16 and the drive tries to transfer 510 bytes, there can be 31
trailing data messages.

This patch makes the following updates to libata ATAPI PIO HSM
implementation.

* Make it drain full spurious chunks.

* Suppress trailing data warning message for misc commands.

* Put limit on how many bytes can be drained.

* If odd, round up consumed bytes and the number of bytes to be
  drained.  This gets the number of bytes to drain right for drivers
  which do 16bit PIO.

This patch is partial backport of improve-ATAPI-data-xfer patchset
pending for #upstream.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

12 years agolibata: update atapi_eh_request_sense() such that lbam/lbah contains buffer size
Tejun Heo [Wed, 12 Dec 2007 03:12:46 +0000]
libata: update atapi_eh_request_sense() such that lbam/lbah contains buffer size

While updating lbam/h for ATAPI commands, atapi_eh_request_sense() was
left out.  Update it.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

12 years agolibata-acpi: implement _GTF command filtering
Tejun Heo [Sat, 15 Dec 2007 06:05:06 +0000]
libata-acpi: implement _GTF command filtering

Implement _GTF command filtering which can be controlled by
libata.acpi_filter kernel parameter.  Currently SETXFER and LOCK
commands are filtered.

libata configures transfer mode by itself and _GTF SETXFER commands
can potentially disrupt device configuration.  _GTM/_STM mechanism
can't handle hotplugging too well and when _GTF is executed,
controller is in PIO0 rather than the mode _STM configured.

Note that detecting SET MAX LOCK requires looking at the previous
command.  This adds a bit to code complexity.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

12 years agolibata-acpi: improve _GTF execution error handling and reporting
Tejun Heo [Sat, 15 Dec 2007 06:05:05 +0000]
libata-acpi: improve _GTF execution error handling and reporting

As _GTF commands can't transfer data, device error never signals
transfer error.  It indicates that the device vetoed the operation, so
it's meaningless to retry.

This patch makes libata-acpi to report and continue on device errors
when executing _GTF commands.  Also commands rejected by device don't
contribute to the number of _GTF commands executed.

While at it, update _GTF execution reporting such that all successful
commands are logged at KERN_DEBUG and rename taskfile_load_raw() to
ata_acpi_run_tf() for consistency.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

12 years agolibata-acpi: improve ACPI disabling
Tejun Heo [Sat, 15 Dec 2007 06:05:04 +0000]
libata-acpi: improve ACPI disabling

* If _GTF evalution fails, it's pointless to retry.  If nothing else
  is wrong, just ignore the error.

* After disabling ACPI, return success iff the number of executed _GTF
  command equals zero.  Otherwise, tell EH to retry.  This change
  fixes bogus 1 return bug where ata_acpi_on_devcfg() expects the
  caller to reload IDENTIFY data and continue but the caller
  interprets it as an error.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

12 years agolibata-acpi: implement dev->gtf_cache and evaluate _GTF right after _STM during resume
Tejun Heo [Sat, 15 Dec 2007 06:05:03 +0000]
libata-acpi: implement dev->gtf_cache and evaluate _GTF right after _STM during resume

On certain implementations, _GTF evaluation depends on preceding _STM
and both can be pretty picky about the configuration.  Using _GTM
result cached during controller initialization satisfies the most
neurotic _STM implementation.  However, libata evaluates _GTF after
reset during device configuration and the hardware state can be
different from what _GTF expects and can cause evaluation failure.

This patch adds dev->gtf_cache and updates ata_dev_get_GTF() such that
it uses the cached value if available.  Cache is cleared with a call
to ata_acpi_clear_gtf().

Because for SATA ACPI nodes _GTF must be evaluated after _SDD which
can't be done till IDENTIFY is complete, _GTF caching from
ata_acpi_on_resume() is used only for IDE ACPI nodes.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

12 years agolibata-acpi: implement and use ata_acpi_init_gtm()
Tejun Heo [Sat, 15 Dec 2007 06:05:02 +0000]
libata-acpi: implement and use ata_acpi_init_gtm()

_GTM fetches currently configured transfer mode while _STM configures
controller according to _GTM parameter and prepares transfer mode
configuration TFs for _GTF.  In many cases _GTM and _STM
implementations are quite brittle and can't cope with configuration
changed by libata.

libata does not depend on ATA ACPI to configure devices.  The only
reason libata performs _GTM and _STM are to make _GTF evaluation
succeed and libata also doesn't care about how _GTF TFs configure
transfer mode.  It overrides that configuration anyway, so from
libata's POV, it doesn't matter what value is feeded to _STM as long
as evaluation succeeds for _STM and following _GTF.

This patch adds dev->__acpi_init_gtm and store initial _GTM values on
host initialization before modified by reset and mode configuration.
If the field is valid, ata_acpi_init_gtm() returns pointer to the
saved _GTM structure; otherwise, NULL.

This saved value is used for _STM during resume and peek at
BIOS/firmware programmed initial timing for later use.  The accessor
is there to make building w/o ACPI easy as dev->__acpi_init doesn't
exist if ACPI is not enabled.

On driver detach, the initial BIOS configuration is restored by
executing _STM with the initial _GTM values such that the next driver
can also use the initial BIOS configured values.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

12 years agolibata-acpi: add new hooks ata_acpi_dissociate() and ata_acpi_on_disable()
Tejun Heo [Sat, 15 Dec 2007 06:05:01 +0000]
libata-acpi: add new hooks ata_acpi_dissociate() and ata_acpi_on_disable()

Add two hooks - ata_acpi_dissociate() which is called during driver
detach after the whole host is shutdown and ata_acpi_on_disable()
which is called when a device is disabled.

Signed-off-by: Tejun heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

12 years agolibata: ata_dev_disable() should be called from EH context
Tejun Heo [Sat, 15 Dec 2007 06:05:00 +0000]
libata: ata_dev_disable() should be called from EH context

ata_port_detach() calls ata_dev_disable() with host lock held but
ata_dev_disable() should be called from EH context.  ata_port_detach()
steals EH context by setting ATA_PFLAG_UNLOADAING and flushing EH.
Drop locking around ata_dev_disable() and note that ata_port_detach()
owns EH context at that point.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

12 years agolibata: add more opcodes to ata.h
Tejun Heo [Sat, 15 Dec 2007 06:04:59 +0000]
libata: add more opcodes to ata.h

Add constants for DEVICE CONFIGURATION OVERLAY and SET_MAX to
include/linux/ata.h.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

12 years agolibata: update ata_*_printk() macros such that level can be a variable
Tejun Heo [Sat, 15 Dec 2007 06:04:58 +0000]
libata: update ata_*_printk() macros such that level can be a variable

Make prink helpers format @lv together rather than prepending to the
format string as constant.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

12 years agolibata-acpi: adjust constness in ata_acpi_gtm/stm() parameters
Tejun Heo [Sat, 15 Dec 2007 06:04:57 +0000]
libata-acpi: adjust constness in ata_acpi_gtm/stm() parameters

* No internal function uses const ata_port.  Drop const from @ap.

* Make ata_acpi_stm() copy @stm before using it and change @stm to
  const.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>