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Expose the new lock protection lock.
This can be used to annotate places where we take multiple locks of the
same class and avoid deadlocks by always taking another (top-level) lock
first.
NOTE: we're still bound to the MAX_LOCK_DEPTH (48) limit.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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On Fri, 2008-08-01 at 16:26 -0700, Linus Torvalds wrote:
> On Fri, 1 Aug 2008, David Miller wrote:
> >
> > Taking more than a few locks of the same class at once is bad
> > news and it's better to find an alternative method.
>
> It's not always wrong.
>
> If you can guarantee that anybody that takes more than one lock of a
> particular class will always take a single top-level lock _first_, then
> that's all good. You can obviously screw up and take the same lock _twice_
> (which will deadlock), but at least you cannot get into ABBA situations.
>
> So maybe the right thing to do is to just teach lockdep about "lock
> protection locks". That would have solved the multi-queue issues for
> networking too - all the actual network drivers would still have taken
> just their single queue lock, but the one case that needs to take all of
> them would have taken a separate top-level lock first.
>
> Never mind that the multi-queue locks were always taken in the same order:
> it's never wrong to just have some top-level serialization, and anybody
> who needs to take <n> locks might as well do <n+1>, because they sure as
> hell aren't going to be on _any_ fastpaths.
>
> So the simplest solution really sounds like just teaching lockdep about
> that one special case. It's not "nesting" exactly, although it's obviously
> related to it.
Do as Linus suggested. The lock protection lock is called nest_lock.
Note that we still have the MAX_LOCK_DEPTH (48) limit to consider, so anything
that spills that it still up shit creek.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Most the free-standing lock_acquire() usages look remarkably similar, sweep
them into a new helper.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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struct held_lock {
u64 prev_chain_key; /* 0 8 */
struct lock_class * class; /* 8 8 */
long unsigned int acquire_ip; /* 16 8 */
struct lockdep_map * instance; /* 24 8 */
int irq_context; /* 32 4 */
int trylock; /* 36 4 */
int read; /* 40 4 */
int check; /* 44 4 */
int hardirqs_off; /* 48 4 */
/* size: 56, cachelines: 1 */
/* padding: 4 */
/* last cacheline: 56 bytes */
};
struct held_lock {
u64 prev_chain_key; /* 0 8 */
long unsigned int acquire_ip; /* 8 8 */
struct lockdep_map * instance; /* 16 8 */
unsigned int class_idx:11; /* 24:21 4 */
unsigned int irq_context:2; /* 24:19 4 */
unsigned int trylock:1; /* 24:18 4 */
unsigned int read:2; /* 24:16 4 */
unsigned int check:2; /* 24:14 4 */
unsigned int hardirqs_off:1; /* 24:13 4 */
/* size: 32, cachelines: 1 */
/* padding: 4 */
/* bit_padding: 13 bits */
/* last cacheline: 32 bytes */
};
[mingo@elte.hu: shrunk hlock->class too]
[peterz@infradead.org: fixup bit sizes]
Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
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this can be used to reset a held lock's subclass, for arbitrary-depth
iterated data structures such as trees or lists which have per-node
locks.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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When we traverse the graph, either forwards or backwards, we
are interested in whether a certain property exists somewhere
in a node reachable in the graph.
Therefore it is never necessary to traverse through a node more
than once to get a correct answer to the given query.
Take advantage of this property using a global ID counter so that we
need not clear all the markers in all the lock_class entries before
doing a traversal. A new ID is choosen when we start to traverse, and
we continue through a lock_class only if it's ID hasn't been marked
with the new value yet.
This short-circuiting is essential especially for high CPU count
systems. The scheduler has a runqueue per cpu, and needs to take
two runqueue locks at a time, which leads to long chains of
backwards and forwards subgraphs from these runqueue lock nodes.
Without the short-circuit implemented here, a graph traversal on
a runqueue lock can take up to (1 << (N - 1)) checks on a system
with N cpus.
For anything more than 16 cpus or so, lockdep will eventually bring
the machine to a complete standstill.
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: fix 2.6.27rc1 cannot boot more than 8CPUs
x86: make "apic" an early_param() on 32-bit, NULL check
EFI, x86: fix function prototype
x86, pci-calgary: fix function declaration
x86: work around gcc 3.4.x bug
x86: make "apic" an early_param() on 32-bit
x86, debug: tone down arch/x86/kernel/mpparse.c debugging printk
x86_64: restore the proper NR_IRQS define so larger systems work.
x86: Restore proper vector locking during cpu hotplug
x86: Fix broken VMI in 2.6.27-rc..
x86: fdiv bug detection fix
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Fix function prototype in header file to match source code:
linux-next-20080807/arch/x86/kernel/efi_64.c:100:14: error: symbol 'efi_ioremap' redeclared with different type (originally declared at include2/asm/efi.h:89) - different address spaces
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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As pointed out and tracked by Yinghai Lu <yhlu.kernel@gmail.com>:
Dhaval Giani got:
kernel BUG at arch/x86/kernel/io_apic_64.c:357!
invalid opcode: 0000 [1] SMP
CPU 24
...
his system (x3950) has 8 ioapic, irq > 256
This was caused by:
commit 9b7dc567d03d74a1fbae84e88949b6a60d922d82
Author: Thomas Gleixner <tglx@linutronix.de>
Date: Fri May 2 20:10:09 2008 +0200
x86: unify interrupt vector defines
The interrupt vector defines are copied 4 times around with minimal
differences. Move them all into asm-x86/irq_vectors.h
It appears that Thomas did not notice that x86_64 does something
completely different when he merge irq_vectors.h
We can solve this for 2.6.27 by simply reintroducing the old heuristic
for setting NR_IRQS on x86_64 to a usable value, which trivially removes
the regression.
Long term it would be nice to harmonize the handling of ioapic interrupts
of x86_32 and x86_64 so we don't have this kind of confusion.
Dhaval Giani <dhaval@linux.vnet.ibm.com> tested an earlier version of
this patch by YH which confirms simply increasing NR_IRQS fixes the
problem.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Cc: Mike Travis <travis@sgi.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Having cpu_online_map change during assign_irq_vector can result
in some really nasty and weird things happening. The one that
bit me last time was accessing non existent per cpu memory for non
existent cpus.
This locking was removed in a sloppy x86_64 and x86_32 merge patch.
Guys can we please try and avoid subtly breaking x86 when we are
merging files together?
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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* 'for-linus' of git://git.o-hand.com/linux-mfd:
mfd: tc6393 cleanup and update
mfd: have TMIO drivers and subdevices depend on ARM
mfd: TMIO MMC driver
mfd: driver for the TMIO NAND controller
mfd: t7l66 MMC platform data
mfd: tc6387 MMC platform data
mfd: Fix 7l66 and 6387 according to the new mfd-core API
mfd: Fix tc6393 according to the new tmio.h
mfd: driver for the TC6387XB TMIO controller.
mfd: driver for the T7L66XB TMIO SoC
mfd: TMIO MMC structures and accessors.
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This patchset cleans up the TC6393XB support.
* Add provision for the MMC subdevice
* Disable / enable clocks on suspend / resume
* Remove fragments of badly merged code (eg. linux/fb include etc.)
* Use a device specific clock name to break dependancy on ARM/PXA2XX
* Drop unnecessary resource names
* Switch to tmio_io* accessors
Signed-off-by: Ian Molton <spyro@f2s.com>
Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
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This patch adds support for the TC6387XB. Unlike other TMIO devices this one
has only one subdevice and no interrupt mux, however using the MFD framework
allows it to share the TMIO MMC driver.
Signed-off-by: Ian Molton <spyro@f2s.com>
Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
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This patchset provides support for the core functinality of the T7L66XB
SoC from Toshiba. Supported in this patchset is the IRQ MUX, MMC controller
and NAND flash controller.
Signed-off-by: Ian Molton <spyro@f2s.com>
Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
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Signed-off-by: Ian Molton <spyro@f2s.com>
Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
powerpc: Remove include/linux/harrier_defs.h
powerpc: Do not ignore arch/powerpc/include
powerpc: Delete completed "ppc removal" task from feature removal file
powerpc/mm: Fix attribute confusion with htab_bolt_mapping()
powerpc/pci: Don't keep ISA memory hole resources in the tree
powerpc: Zero fill the return values of rtas argument buffer
powerpc/4xx: Update defconfig files for 2.6.27-rc1
powerpc/44x: Incorrect NOR offset in Warp DTS
powerpc/44x: Warp DTS changes for board updates
powerpc/4xx: Cleanup Warp for i2c driver changes.
powerpc/44x: Adjust warp-nand resource end address
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It was only used by code in arch/ppc, and arch/ppc is gone, so remove
the unused harrier_defs.h as well.
Signed-off-by: Paul Mackerras <paulus@samba.org>
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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:
PCI: Limit VPD length for Broadcom 5708S
PCI PM: Export pci_pme_active to drivers
PCI: remove duplicate symbol from pci_ids.h
PCI: check the return value of device_create_bin_file() in pci_create_bus()
PCI: fully restore MSI state at resume time
DMA: make dma-coherent.c documentation kdoc-friendly
PCI: make pci_register_driver() a macro
PCI: add Broadcom 5708S to VPD length quirk
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Export pci_pme_active() to drivers, so that they can clear the
PME_status bit and disable PME# for their devices without involving
ACPI.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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pci.ids.h: remove a duplicated symbol
Cc: Doug Thompson <dougthompson@xmission.com>
Signed-off-by: Grant Coady <gcoady.lk@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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alpha:
CC [M] drivers/usb/gadget/u_ether.o
In file included from include/asm/dma-mapping.h:7,
from include/linux/dma-mapping.h:52,
from include/linux/dmaengine.h:29,
from include/linux/skbuff.h:29,
from include/linux/if_ether.h:114,
from include/linux/etherdevice.h:27,
from drivers/usb/gadget/u_ether.c:29:
include/linux/pci.h: In function 'pci_register_driver':
include/linux/pci.h:673: error: 'KBUILD_MODNAME' undeclared (first use in this function)
include/linux/pci.h:673: error: (Each undeclared identifier is reported only once
include/linux/pci.h:673: error: for each function it appears in.)
Sam says:
The problem is that u_ether.o is used by two modules so when we build it
KBUILD_MODNAME is not defined because kbuild does not know what value to
use.
And in pci.h we have the following inline:
static inline int __must_check pci_register_driver(struct pci_driver *driver)
{
return __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME);
}
And alpha uses dma-mapping.h to nullify a number of functions that seem to
require something from pci.h.
Making it a macro fixes this particular problem. However, the underlying issue
of a file using KBUILD_MODNAME and being shared between multiple modules is
*not* addressed. I guess the answer there is "don't do that".
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Wire up for m68k{,nommu} the system calls that were added in the last merge
window:
- 4006553b06306b34054529477b06b68a1c66249b ("flag parameters: inotify_init")
- ed8cae8ba01348bfd83333f4648dd807b04d7f08 ("flag parameters: pipe")
- 336dd1f70ff62d7dd8655228caed4c5bfc818c56 ("flag parameters: dup2")
- a0998b50c3f0b8fdd265c63e0032f86ebe377dbf ("flag parameters: epoll_create")
- 9fe5ad9c8cef9ad5873d8ee55d1cf00d9b607df0 ("flag parameters add-on: remove
epoll_create size param")
- b087498eb5605673b0f260a7620d91818cd72304 ("flag parameters: eventfd")
- 9deb27baedb79759c3ab9435a7d8b841842d56e9 ("flag parameters: signalfd")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6:
SLUB: dynamic per-cache MIN_PARTIAL
mm: unexport ksize
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This patch changes the static MIN_PARTIAL to a dynamic per-cache ->min_partial
value that is calculated from object size. The bigger the object size, the more
pages we keep on the partial list.
I tested SLAB, SLUB, and SLUB with this patch on Jens Axboe's 'netio' example
script of the fio benchmarking tool. The script stresses the networking
subsystem which should also give a fairly good beating of kmalloc() et al.
To run the test yourself, first clone the fio repository:
git clone git://git.kernel.dk/fio.git
and then run the following command n times on your machine:
time ./fio examples/netio
The results on my 2-way 64-bit x86 machine are as follows:
[ the minimum, maximum, and average are captured from 50 individual runs ]
real time (seconds)
min max avg sd
SLAB 22.76 23.38 22.98 0.17
SLUB 22.80 25.78 23.46 0.72
SLUB (dynamic) 22.74 23.54 23.00 0.20
sys time (seconds)
min max avg sd
SLAB 6.90 8.28 7.70 0.28
SLUB 7.42 16.95 8.89 2.28
SLUB (dynamic) 7.17 8.64 7.73 0.29
user time (seconds)
min max avg sd
SLAB 36.89 38.11 37.50 0.29
SLUB 30.85 37.99 37.06 1.67
SLUB (dynamic) 36.75 38.07 37.59 0.32
As you can see from the above numbers, this patch brings SLUB to the same level
as SLAB for this particular workload fixing a ~2% regression. I'd expect this
change to help similar workloads that allocate a lot of objects that are close
to the size of a page.
Cc: Matthew Wilcox <matthew@wil.cx>
Cc: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
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* git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6:
avr32: Make atstk1006_nand_data definition static
avr32: Reduce DataFlash bus speed to 8 MHz on ATNGW100
avr32: Update defconfigs
avr32: Clean up HMATRIX code
avr32: Add MMIO address definitions for certain controllers
avr32: Introduce <mach/chip.h>
avr32: Remove include/asm-avr32/arch-at32ap
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Since all users have been converted over to use <mach/foo.h>, there's no
need for the arch-at32ap directory and associated symlink anymore.
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
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Fix fatal multi-line kernel-doc error in list.h:
function short description must be on one line.
Error(linux-2.6.27-rc2-git3//include/linux/list.h:318): duplicate section name 'Description'
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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* 'for-linus-merged' of master.kernel.org:/home/rmk/linux-2.6-arm:
[ARM] 5177/1: arm/mach-sa1100/Makefile: remove CONFIG_SA1100_USB
[ARM] 5166/1: magician: add MAINTAINERS entry
[ARM] fix pnx4008 build errors
[ARM] Fix SMP booting with non-zero PHYS_OFFSET
[ARM] 5185/1: Fix spi num_chipselect for lubbock
[ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach
[ARM] Add support for arch/arm/mach-*/include and arch/arm/plat-*/include
[ARM] Remove asm/hardware.h, use asm/arch/hardware.h instead
[ARM] Eliminate useless includes of asm/mach-types.h
[ARM] Fix circular include dependency with IRQ headers
avr32: Use <mach/foo.h> instead of <asm/arch/foo.h>
avr32: Introduce arch/avr32/mach-*/include/mach
avr32: Move include/asm-avr32 to arch/avr32/include/asm
[ARM] sa1100_wdt: use reset_status to remember watchdog reset status
[ARM] pxa: introduce reset_status and clear_reset_status for driver's usage
[ARM] pxa: introduce reset.h for reset specific header information
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Conflicts:
drivers/watchdog/at91rm9200_wdt.c
drivers/watchdog/davinci_wdt.c
drivers/watchdog/ep93xx_wdt.c
drivers/watchdog/ixp2000_wdt.c
drivers/watchdog/ixp4xx_wdt.c
drivers/watchdog/ks8695_wdt.c
drivers/watchdog/omap_wdt.c
drivers/watchdog/pnx4008_wdt.c
drivers/watchdog/sa1100_wdt.c
drivers/watchdog/wdt285.c
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include/linux/i2c-pnx.h was missed when moving the include files.
Fix it now; it doesn't really need to include mach/i2c.h at all.
Successfully build tested with pnx4008_defconfig, which had
failed in linux-next.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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This just leaves include/asm-arm/plat-* to deal with.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6
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Leaving include/asm/arch alone for now.
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
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Remove includes of asm/hardware.h in addition to asm/arch/hardware.h.
Then, since asm/hardware.h only exists to include asm/arch/hardware.h,
update everything to directly include asm/arch/hardware.h and remove
asm/hardware.h.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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There are 43 includes of asm/mach-types.h by files that don't
reference anything from that file. Remove these unnecessary
includes.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (99 commits)
pkt_sched: Fix actions referencing
bnx2x: fix logical op
tcp: (whitespace only) fix confusing indentation
pkt_sched: Fix qdisc config when link is down.
[Bluetooth] Add full quirk implementation for btusb driver
[Bluetooth] Removal of unnecessary ignore module parameter
[Bluetooth] Add parameters to control BNEP header compression
ath9k: Revamp wireless mode usage
ath9k: More unused macros
ath9k: Remove a few unused macros and fix indentation
ath9k: Use mac80211's band macros and remove enum hal_freq_band
ath9k: Remove redundant data structure ath9k_txq_info
ath9k: Cleanup data structures related to HW capabilities
ath9k: work around gcc ICEs
ath9k: Add new Atheros IEEE 802.11n driver
ath5k: remove Atheros 11n devices from supported list
list.h: add list_cut_position()
list.h: Add list_splice_tail() and list_splice_tail_init()
p54: swap short slot time dcf values
rt2x00: Block all unsupported modes
...
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This adds list_cut_position() which lets you cut a list into
two lists given a pivot in the list.
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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If you are using linked lists for queues list_splice() will not do what
you would expect even if you use the elements passed reversed. We need
to handle these differently. We add list_splice_tail() and
list_splice_tail_init().
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6
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git://git.kernel.org/pub/scm/linux/kernel/git/chris/linux-2.6 into tmp
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Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
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The dm9000 driver reads the chip's MAC address from the attached EEPROM. When
no EEPROM is present, or when the MAC address is invalid, it falls back to
reading the address from the chip.
This patch lets platform code set the desired MAC address through platform
data.
Signed-off-by: Laurent Pinchart <laurentp@cse-semaphore.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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Introduce the speed_hi field to ethtool_cmd, using the reserved space,
to expand the speed field to 2^32 Megabits/second.
Making this field expansion now gives us plenty of time to fix up the
user-space pieces that use SIOCETHTOOL before hardware faster than 64
Gb/s is available.
Signed-off-by: Brandon Philips <bphilips@suse.de>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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If the following packet flow happen, kernel will panic.
MathineA MathineB
SYN
---------------------->
SYN+ACK
<----------------------
ACK(bad seq)
---------------------->
When a bad seq ACK is received, tcp_v4_md5_do_lookup(skb->sk, ip_hdr(skb)->daddr))
is finally called by tcp_v4_reqsk_send_ack(), but the first parameter(skb->sk) is
NULL at that moment, so kernel panic happens.
This patch fixes this bug.
OOPS output is as following:
[ 302.812793] IP: [<c05cfaa6>] tcp_v4_md5_do_lookup+0x12/0x42
[ 302.817075] Oops: 0000 [#1] SMP
[ 302.819815] Modules linked in: ipv6 loop dm_multipath rtc_cmos rtc_core rtc_lib pcspkr pcnet32 mii i2c_piix4 parport_pc i2c_core parport ac button ata_piix libata dm_mod mptspi mptscsih mptbase scsi_transport_spi sd_mod scsi_mod crc_t10dif ext3 jbd mbcache uhci_hcd ohci_hcd ehci_hcd [last unloaded: scsi_wait_scan]
[ 302.849946]
[ 302.851198] Pid: 0, comm: swapper Not tainted (2.6.27-rc1-guijf #5)
[ 302.855184] EIP: 0060:[<c05cfaa6>] EFLAGS: 00010296 CPU: 0
[ 302.858296] EIP is at tcp_v4_md5_do_lookup+0x12/0x42
[ 302.861027] EAX: 0000001e EBX: 00000000 ECX: 00000046 EDX: 00000046
[ 302.864867] ESI: ceb69e00 EDI: 1467a8c0 EBP: cf75f180 ESP: c0792e54
[ 302.868333] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 302.871287] Process swapper (pid: 0, ti=c0792000 task=c0712340 task.ti=c0746000)
[ 302.875592] Stack: c06f413a 00000000 cf75f180 ceb69e00 00000000 c05d0d86 000016d0 ceac5400
[ 302.883275] c05d28f8 000016d0 ceb69e00 ceb69e20 681bf6e3 00001000 00000000 0a67a8c0
[ 302.890971] ceac5400 c04250a3 c06f413a c0792eb0 c0792edc cf59a620 cf59a620 cf59a634
[ 302.900140] Call Trace:
[ 302.902392] [<c05d0d86>] tcp_v4_reqsk_send_ack+0x17/0x35
[ 302.907060] [<c05d28f8>] tcp_check_req+0x156/0x372
[ 302.910082] [<c04250a3>] printk+0x14/0x18
[ 302.912868] [<c05d0aa1>] tcp_v4_do_rcv+0x1d3/0x2bf
[ 302.917423] [<c05d26be>] tcp_v4_rcv+0x563/0x5b9
[ 302.920453] [<c05bb20f>] ip_local_deliver_finish+0xe8/0x183
[ 302.923865] [<c05bb10a>] ip_rcv_finish+0x286/0x2a3
[ 302.928569] [<c059e438>] dev_alloc_skb+0x11/0x25
[ 302.931563] [<c05a211f>] netif_receive_skb+0x2d6/0x33a
[ 302.934914] [<d0917941>] pcnet32_poll+0x333/0x680 [pcnet32]
[ 302.938735] [<c05a3b48>] net_rx_action+0x5c/0xfe
[ 302.941792] [<c042856b>] __do_softirq+0x5d/0xc1
[ 302.944788] [<c042850e>] __do_softirq+0x0/0xc1
[ 302.948999] [<c040564b>] do_softirq+0x55/0x88
[ 302.951870] [<c04501b1>] handle_fasteoi_irq+0x0/0xa4
[ 302.954986] [<c04284da>] irq_exit+0x35/0x69
[ 302.959081] [<c0405717>] do_IRQ+0x99/0xae
[ 302.961896] [<c040422b>] common_interrupt+0x23/0x28
[ 302.966279] [<c040819d>] default_idle+0x2a/0x3d
[ 302.969212] [<c0402552>] cpu_idle+0xb2/0xd2
[ 302.972169] =======================
[ 302.974274] Code: fc ff 84 d2 0f 84 df fd ff ff e9 34 fe ff ff 83 c4 0c 5b 5e 5f 5d c3 90 90 57 89 d7 56 53 89 c3 50 68 3a 41 6f c0 e8 e9 55 e5 ff <8b> 93 9c 04 00 00 58 85 d2 59 74 1e 8b 72 10 31 db 31 c9 85 f6
[ 303.011610] EIP: [<c05cfaa6>] tcp_v4_md5_do_lookup+0x12/0x42 SS:ESP 0068:c0792e54
[ 303.018360] Kernel panic - not syncing: Fatal exception in interrupt
Signed-off-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-utrace
* 'tracehook' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-utrace:
tracehook: fix CLONE_PTRACE
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In the change in commit 09a05394fe2448a4139b014936330af23fa7ec83, I
overlooked two nits in the logic and this broke using CLONE_PTRACE
when PTRACE_O_TRACE* are not being used.
A parent that is itself traced at all but not using PTRACE_O_TRACE*,
using CLONE_PTRACE would have its new child fail to be traced.
A parent that is not itself traced at all that uses CLONE_PTRACE
(which should be a no-op in this case) would confuse the bookkeeping
and lead to a crash at exit time.
This restores the missing checks and fixes both failure modes.
Reported-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Roland McGrath <roland@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
IB/mad: Test ib_create_send_mad() return with IS_ERR(), not == NULL
IB/mlx4: Allow 4K messages for UD QPs
mlx4_core: Add ethernet fields to CQE struct
IB/ipath: Fix printk format warnings
RDMA/cxgb3: Fix deadlock initializing iw_cxgb3 device
RDMA/cxgb3: Fix up MW access rights
RDMA/cxgb3: Fix QP capabilities
RDMA/cma: Remove padding arrays by using struct sockaddr_storage
IB/ipath: Use unsigned long for irq flags
IPoIB/cm: Set correct SG list in ipoib_cm_init_rx_wr()
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Add ethernet-related fields to struct mlx4_cqe so that the mlx4_en
ethernet NIC driver can share the same definition.
Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
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