Linus deleted the old code and put signing on the install command,
I fixed it to extract the keyid and signer-name within sign-file
and cleaned up that script now it always signs in-place.
Some enthusiast should convert sign-key to perl and pull
x509keyid into it.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
From Borislav Petkov <bp@amd64.org>:
Below is a RAS fix which reverts the addition of a sysfs attribute
which we agreed is not needed, post-factum. And this should go in now
because that sysfs attribute is going to end up in 3.7 otherwise and
thus exposed to userspace; removing it then would be a lot harder.
This is done as a merge rather than a simple patch/cherry-pick since
the baseline for this patch was not in the previous x86/urgent.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
450cc20103 ("x86/mce: Provide boot argument to honour bios-set CMCI
threshold") added the bios_cmci_threshold sysfs attribute which was
supposed to communicate to userspace tools that BIOS CMCI threshold has
been honoured.
However, this info is not of any importance to userspace - it should
rather get the actual error count it has been thresholded already from
MCi_STATUS[38:52].
So drop this before it becomes a used interface (good thing we caught
this early in 3.7-rc1, right after the merge window closed).
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Acked-by: Tony Luck <tony.luck@intel.com>
Link: http://lkml.kernel.org/r/20121017105940.GA14590@x1.osrc.amd.com
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
It turns out that S390 shouldn't use uapi/asm-generic/kvm_para.h since it
defines the functions in its non-UAPI kvm_para.h file.
#including <asm-generic/kvm_para.h> will first pick up
include/asm-generic/kvm_para.h, which defines conflicting functions.
Instead, partially revert commit 0420c87e64,
ungenericising this file and just inserting a comment to prevent the patch
program from deleting it.
cc: Yuanhan Liu <yuanhan.liu@intel.com>
cc: fengguang.wu@intel.com
Reported-by: Yuanhan Liu <yuanhan.liu@intel.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Make arch/ia64/include/asm/kvm_para.h generic since it's the same as the
asm-generic version. This deals with the problem when ia64 is compiled with
allmodconfig you get:
In file included from include/uapi/linux/kvm_para.h:26:0,
from include/linux/kvm_para.h:4,
from kernel/watchdog.c:28:
arch/ia64/include/asm/kvm_para.h:24:28: error: redefinition of 'kvm_arch_para_features'
include/asm-generic/kvm_para.h:16:28: note: previous definition of 'kvm_arch_para_features' was here
arch/ia64/include/asm/kvm_para.h:29:20: error: redefinition of 'kvm_check_and_clear_guest_paused'
include/asm-generic/kvm_para.h:11:20: note: previous definition of 'kvm_check_and_clear_guest_paused' was here
This does not happen for ia64 defconfig.
Reported-by: Yuanhan Liu <yuanhan.liu@intel.com>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Yuanhan Liu <yuanhan.liu@intel.com>
cc: fengguang.wu@intel.com
Signed-off-by: Tony Luck <tony.luck@intel.com>
Pull media fixes from Mauro Carvalho Chehab:
"Media fixes for:
- one Kconfig fix patch;
- one patch fixing DocBook breakage due to the drivers/media UAPI
changes;
- the remaining UAPI media changes (DVB API).
I'm aware that is is a little late for the UAPI renames for the DVB
API, but IMHO, it is better to merge it for 3.7, due to two reasons:
1) There is a major rename at 3.7 (not only uapi changes, but also
the entire media drivers were reorganized on 3.7, in order to
simplify the Kconfig logic, and easy drivers selection, especially
for hybrid devices). By confining all those renames there at 3.7
it will cause all the harm at for media developers on just one
shot. Stable backports upstream and at distros will likely
welcome it as well, as they won't need to check what changed on
3.7 and what was postponed for on 3.8.
2) The V4L2 DocBook Makefile creates a cross-reference between the
media API headers and the specs. This helps us _a_lot_ to be sure
that all API improvements are properly documented. Every time a
header changes from one place to another, DocBook/media/Makefile
needs to be patched. Currently, the DocBook breakage patch
depends on the DVB UAPI."
* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
[media] Kconfig: Fix dependencies for driver autoselect options
DocBook/media/Makefile: Fix build due to uapi breakage
UAPI: (Scripted) Disintegrate include/linux/dvb
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Michael Kerrisk <mtk.manpages@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Dave Jones <davej@redhat.com>
Signed-off-by: Richard Kuo <rkuo@codeaurora.org>
Calling convention for internal functions and 'asmlinkage' functions is
different on x86-32. Therefore do not directly cast aesni_enc as XTS tweak
function, but use wrapper function in between. Fixes crash with "XTS +
aesni_intel + x86-32" combination.
Cc: stable@vger.kernel.org
Reported-by: Krzysztof Kolasa <kkolasa@winsoft.pl>
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit 38f3865744 ("xattr: extract simple_xattr code from tmpfs") moved
some code from tmpfs but introduced a subtle bug along the way.
If the name passed to simple_xattr_remove() does not exist in the list of
xattrs, then it is possible to call kfree(new_xattr) when new_xattr is
actually initialized to itself on the stack via uninitialized_var().
This causes a BUG() since the memory was not allocated via the slab
allocator and was not bypassed through to the page allocator because it
was too large.
Initialize the local variable to NULL so the kfree() never takes place.
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Hugh Dickins <hughd@google.com>
Acked-by: Aristeu Rozanski <aris@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
If a debugger tries to zero a hardware debug control register, the
kernel will try to infer both the type and length of the breakpoint
in order to sanity-check against the requested regset type. This will
fail because the encoding will appear as a zero-length breakpoint.
This patch changes the control register setting so that disabled
breakpoints are treated as HW_BREAKPOINT_EMPTY and no further
sanity-checking is required.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
The user_hwdebug_state structure contains implicit padding to conform to
the alignment requirements of the AArch64 ABI (namely that aggregates
must be aligned to their most aligned member).
This patch fixes the ptrace functions operating on struct
user_hwdebug_state so that the padding is handled correctly.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
For historical reasons, ARM used to set r0-r2 in start_thread() to the
first values on the user stack when starting a new user application. The
same logic has been inherited in AArch64. The x0 register is overridden
by the sys_execve() return value so it's always zero on success. The x1
and x2 registers are ignored by AArch64 and EABI AArch32 applications,
so we can safely remove the register setting for both native and compat
user space.
This also fixes a potential fault with the kernel accessing user space
stack directly.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Al Viro <viro@zeniv.linux.org.uk>
According to Documentation/arm64/booting.txt, the kernel image must be
loaded at a pre-defined offset from the start of RAM so that the kernel
can calculate PHYS_OFFSET based on this address. If the DT contains
memory blocks below this PHYS_OFFSET, report them and ignore the
corresponding memory range.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
With commit 576094b7 (time: Introduce new GENERIC_TIME_VSYSCALL) the old
update_vsyscall() prototype is no longer available. This patch updates
the arm64 port.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: John Stultz <john.stultz@linaro.org>
With commit 786d35d4 (make most arch asm/module.h files use
asm-generic/module.h) arm64 needs to enable MODULES_USE_ELF_RELA for
loadable modules.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Will Deacon <Will.Deacon@arm.com>
Pull MIPS fixes from Ralf Baechle:
"Random small fixes across the MIPS code."
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
MIPS: CMP: Fix physical core number calculation logic
MIPS: JZ4740: Forward declare struct uart_port in header.
MIPS: JZ4740: Fix '#include guard' in serial.h
MIPS: hugetlbfs: Fix hazard between tlb write and pagemask restoration.
MIPS: Restore pagemask after dumping the TLB.
MIPS: Hugetlbfs: Handle huge pages correctly in pmd_bad()
MIPS: R5000: Fix TLB hazard handling.
MIPS: tlbex: Deal with re-definition of label
MIPS: Make __{,n,u}delay declarations match definitions and generic delay.h
Pull powerpc fixes from Benjamin Herrenschmidt:
"Here are a handful of powerpc related fixes."
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
cpuidle/powerpc: Fix snooze state problem in the cpuidle design on pseries.
cpuidle/powerpc: Fix smt_snooze_delay functionality.
cpuidle/powerpc: Fix target residency initialisation in pseries cpuidle
powerpc: Build fix for powerpc KVM
Revert "powerpc/perf: Use pmc_overflow() to detect rolled back events"
A handful of fixes:
- a fix for dtc from upstream
- sparse fixes in DeviceTree code
- stub of_get_child_by_name for !OF builds
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Merge tag 'dt-fixes-for-3.7' of git://sources.calxeda.com/kernel/linux
Pull DeviceTree fixes from Rob Herring:
"A handful of fixes:
- a fix for dtc from upstream
- sparse fixes in DeviceTree code
- stub of_get_child_by_name for !OF builds"
* tag 'dt-fixes-for-3.7' of git://sources.calxeda.com/kernel/linux:
dtc: fix for_each_*() to skip first object if deleted
of/platform: sparse fix
of/irq: sparse fixes
of/address: sparse fixes
of: add stub of_get_child_by_name for non-OF builds
Significant changes are:
- A regression fix for the new HD-audio LPIB delay counting,
VGA-switcheroo race fix
- ASoC ams-delta fix for the broken driver loading
Otherwise a collection of mostly small / trivial fixes.
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Merge tag 'sound-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"Significant changes are:
- A regression fix for the new HD-audio LPIB delay counting,
VGA-switcheroo race fix
- ASoC ams-delta fix for the broken driver loading
Otherwise a collection of mostly small / trivial fixes."
* tag 'sound-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: emu10k1: add chip details for E-mu 1010 PCIe card
ALSA: hda - Always check array bounds in alc_get_line_out_pfx
ASoC: bells: Correct typo in sub speaker DAI name for WM5110
ALSA: hda - Stop LPIB delay counting on broken hardware
ALSA: hda - Fix registration race of VGA switcheroo
ALSA: hda - Clean up superfluous position_fix list entries
ALSA: ac97 - Fix missing NULL check in snd_ac97_cvol_new()
ASoC: codecs: da9055: Minor improvement in ALC calibration process
ASoC: dmaengine: Correct Makefile when sound is built as module
ASoC: fsi: don't reschedule DMA from an atomic context
ASoC: fix documentation in soc-jack
ARM: pxa: Fix build error caused by sram.h rename
ASoC: wm2200: Fix non-inverted OUT2 mute control
ASoC: wm2200: Use rev A register patches on rev B
ASoC: bells: Correct typo in sub speaker DAI name for WM5110
ASoC: ams-delta: Convert to use snd_soc_register_card()
ASoC: omap-mcpdm: Remove OMAP revision check
ASoC: Fix wrong include for McPDM
ASoC: omap-abe-twl6040: Fix typo of Vibrator
ASoC: twl6040: Fix Stream DAPM mapping
Change event type to switch for the power and autopower switches.
Additionally, this patch aligns the keycodes with the other linkstation
boards already supported by linux.
Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Don't use the specific board name in a the common device tree include file.
Instead use the common name 'lsxl'.
Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Move the CACHE_FEROCEON_L2 test to kirkwood_l2_init, since linking
fails on the reference to feroceon_l2_init.
Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
The sysfs and procfs output of the instruction and data caches were
wrong: the output of the data cache provided that instruction cache
values and vice versa.
Fix this by using the correct type indication when issueing the
ecag instruction.
Reported-by: Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Because of a change in the s390 arch backend of binutils (commit 23ecd77
"Pick the default arch depending on the target size" in binutils repo)
31 bit builds will fail since the linker would now try to create 64 bit
binary output.
Fix this by setting OUTPUT_ARCH to s390:31-bit instead of s390.
Thanks to Andreas Krebbel for figuring out the issue.
Fixes this build error:
LD init/built-in.o
s390x-4.7.2-ld: s390:31-bit architecture of input file
`arch/s390/kernel/head.o' is incompatible with s390:64-bit output
Cc: Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
The 0x10000 entry point can be called in z/Arch architecture and 64 bit
addressing mode. Therefore this patch removes the unnecessary 31 bit
switch code from the kdump startup function.
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Increase the maximum number of available counters and check if
the hardware supports the counter. Support is indicated by the
version of the CPU-measurement counter facility.
Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Receiving cc=3 from store subchannel means 2 things:
* the subchannel is not provided
* there are no further subchannels in this subchannel set
With this patch we abort the store subchannel loop after cc=3 (or an
exception) and clear the subsequent bits in the subchannel id set.
Reported-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Acked-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Use generic bitmap functions in the subchannel id bitmap to
simplify and de-bloat the code.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Acked-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Add back a hunk from "4dcc2a4 s390/chsc: make headers usable"
which was lost during the merge of the UAPI patch.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Based on information from the ZTE Windows drivers.
Cc: <stable@vger.kernel.org>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Here's the first set of fixes for v3.7-rc cycle.
DesignWare Core USB3 Driver (dwc3) got two fixes. The first one fixes a long
standing bug which would keep endpoint with BUSY flag set forever if we cancel
a transfer which has already been started by the controller. The second fix
will just switch PHYs back off when DWC3 driver is removed.
MUSB fixed a bug which would cause a Kernel Oops at least on AM3517 when
removing a device. For some reason that particular device can fall into a
situation where you have both Disconnect and Endpoint IRQs happen
simultaneously (have both bits set in IRQ_STATUS register) and, because
Disconnect Interrupt is handled before Endpoint Interrupts, we would try to
transfer data over a disconnected device, thus generating a kernel oops.
Renensas' USB DRD driver got two fixes which are a) fixing an off-by-one bug on
the pipe iterator implementation and b) fixing Interrupt Status Clear procedure
in order to properly clear a single Interrupt event without clearing (and
masking) other events we didn't handle yet.
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Merge tag 'fixes-for-v3.7-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-linus
usb: fixes for v3.7-rc2
Here's the first set of fixes for v3.7-rc cycle.
DesignWare Core USB3 Driver (dwc3) got two fixes. The first one fixes a long
standing bug which would keep endpoint with BUSY flag set forever if we cancel
a transfer which has already been started by the controller. The second fix
will just switch PHYs back off when DWC3 driver is removed.
MUSB fixed a bug which would cause a Kernel Oops at least on AM3517 when
removing a device. For some reason that particular device can fall into a
situation where you have both Disconnect and Endpoint IRQs happen
simultaneously (have both bits set in IRQ_STATUS register) and, because
Disconnect Interrupt is handled before Endpoint Interrupts, we would try to
transfer data over a disconnected device, thus generating a kernel oops.
Renensas' USB DRD driver got two fixes which are a) fixing an off-by-one bug on
the pipe iterator implementation and b) fixing Interrupt Status Clear procedure
in order to properly clear a single Interrupt event without clearing (and
masking) other events we didn't handle yet.
This minor change adds a new system to which the "Fix Compliance Mode
on SN65LVPE502CP Hardware" patch has to be applied also.
System added:
Vendor: Hewlett-Packard. System Model: Z1
Signed-off-by: Alexis R. Cortes <alexis.cortes@ti.com>
Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Make sure port data is initialised before creating sysfs attributes to
avoid a race.
A recent patch ("USB: io_ti: fix port-data memory leak") got the
sysfs-attribute creation and port-data initialisation ordering wrong.
Cc: <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Make sure sysfs attributes are created at port probe.
A recent patch ("USB: iuu_phoenix: fix port-data memory leak") removed
the sysfs-attribute creation by mistake.
Reported-by: Yuanhan Liu <yuanhan.liu@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The CPUNum Field in EBase register is 10bit wide, so after 1 bit right
shift, the mask value should be 0x1ff.
Signed-off-by: jerin jacob <jerinjacobk@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/4420/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
- Based on v3.7-rc1
Adds:
- missing break;s from converting if{}s to switch{}
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Merge tag 'mvebu_gpio_fixes_for_v3.7' of git://git.infradead.org/users/jcooper/linux into fixes
From Jason Cooper:
- missing break;s from converting if{}s to switch{}
* tag 'mvebu_gpio_fixes_for_v3.7' of git://git.infradead.org/users/jcooper/linux:
gpio: mvebu: Add missing breaks in mvebu_gpio_irq_set_type
- Based against v3.7-rc1
- Latest changes to arch/arm/mm/cache-tauros2.c
c2b7e05 ARM: cache: add dt support for tauros2 cache
Misc. fixes for latest changes to mach-dove/
Fixes build breakage for mach-dove
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Merge tag 'mvebu_dove_late_fixes_for_v3.7' of git://git.infradead.org/users/jcooper/linux into fixes
From Jason Cooper:
Misc. fixes for latest changes to mach-dove/
Fixes build breakage for mach-dove
* tag 'mvebu_dove_late_fixes_for_v3.7' of git://git.infradead.org/users/jcooper/linux:
ARM: dove: Add crypto engine to DT
ARM: dove: Remove watchdog from DT
ARM: dove: Restructure SoC device tree descriptor
ARM: dove: Fix clock names of sata and gbe
ARM: dove: Fix tauros2 device tree init
ARM: dove: Add pcie clock support
a regression fix for local timer, and a clockdomain locking fix.
Also few minor fixes for boot time and sparse warnings.
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Merge tag 'omap-for-v3.7-rc1/fixes-take5-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes
From Tony Lindgren:
A boot problem fix for am33xx beaglebone caused by GPMC,
a regression fix for local timer, and a clockdomain locking fix.
Also few minor fixes for boot time and sparse warnings.
* tag 'omap-for-v3.7-rc1/fixes-take5-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: OMAP2+: Allow kernel to boot even if GPMC fails to reserve memory
ARM: OMAP: clockdomain: Fix locking on _clkdm_clk_hwmod_enable / disable
ARM: OMAP4: devices: fixup OMAP4 DMIC platform device error message
ARM: OMAP2+: clock data: Add dev-id for the omap-gpmc dummy fck
ARM: OMAP: resolve sparse warning concerning debug_card_init()
ARM: OMAP4: Fix twd_local_timer_register regression
This branch contains a couple small fixes for Tegra for 3.7.
* A fix for another clock rate calculation overflow
* A revert of a change that removed the "timer" clock on Tegra, coupled
with a fix for the confusing symbol name clash that triggered it.
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Merge tag 'tegra-for-3.7-fixes-for-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra into fixes
From Stephen Warren: ARM: tegra: fixes for 3.7-rc2
This branch contains a couple small fixes for Tegra for 3.7.
* A fix for another clock rate calculation overflow
* A revert of a change that removed the "timer" clock on Tegra, coupled
with a fix for the confusing symbol name clash that triggered it.
* tag 'tegra-for-3.7-fixes-for-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra:
ARM: tegra: add tegra_timer clock
ARM: tegra: rename tegra system timer
ARM: tegra30: clk: Fix output_rate overflow
Signed-off-by: Olof Johansson <olof@lixom.net>
Earlier without cpuidle framework on pseries, the native arch
idle routine comprised of both snooze and nap
states. smt_snooze_delay variable was used to delay
the idle process entry to deeper idle state like nap.
With the coming of cpuidle, this arch specific idle was replaced
by two different idle routines, one for supporting snooze and other
for nap. This enabled addition of more
low level idle states on pseries in the future.
On adopting the generic cpuidle framework for POWER systems,
the decision of which idle state to choose from, given a predicted
idle time is taken by the menu governor based on
target_residency and exit_latency of the idle states.
target_residency is the minimum time to be resident in that idle state.
Exit_latency is time taken to exit out of idle state.
Deeper the idle state, both the target residency and exit latency
would be higher.
In the current design, smt_snooze_delay is used as target_residency
for the snooze state which is incorrect, as it is not the
minimum but the maximum duration to be in snooze state.
This would result in the governor in taking bad decision,
as presently target_residency of nap < target_residency of snooze
inspite of nap being deeper idle state.
This patch aims to fix this problem by replacing the smt_snooze_delay loop
in snooze state, with the need_resched() as the governor is aware of
entry and exit of various idle transitions based on which
next idle time prediction.
The governor is intelligent enough to determine the idle state the needs to
be transitioned to and maintains a whole of heuristics including
io load, previous idle states predictions etc for the same, based on
which idle state entry decision is taken.
With this fix, of setting target_residency of snooze to 0
nap to smt_snooze_delay
if the predicted idle time is less
than smt_snooze_delay (target_residency of nap)
value governor would pick snooze state, else nap. This adhers to the
previous native idle design.
Signed-off-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
smt_snooze_delay was designed to delay idle loop's nap entry
in the native idle code before it got ported over to use as part of
the cpuidle framework.
A -ve value assigned to smt_snooze_delay should result in
busy looping, in other words disabling the entry to nap state.
- https://lists.ozlabs.org/pipermail/linuxppc-dev/2010-May/082450.html
This particular functionality can be achieved currently by
echo 1 > /sys/devices/system/cpu/cpu*/state1/disable
but it is broken when one assigns -ve value to the smt_snooze_delay
variable either via sysfs entry or ppc64_cpu util.
This patch aims to fix this, by disabling nap state when smt_snooze_delay
variable is set to -ve value.
Signed-off-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Remove the redundant target residency initialisation in pseries_cpuidle_driver_init().
This is currently over-writing the residency time updated as part of the static
table, resulting in all the idle states having the same target
residency of 100us which is incorrect. This may result in the menu governor making
wrong state decisions.
Signed-off-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Fix build failure for powerpc KVM by adding missing VPN_SHIFT definition
and the ';'
arch/powerpc/kvm/book3s_32_mmu_host.c: In function 'kvmppc_mmu_map_page':
arch/powerpc/kvm/book3s_32_mmu_host.c:176: error: 'VPN_SHIFT' undeclared (first use in this function)
arch/powerpc/kvm/book3s_32_mmu_host.c:176: error: (Each undeclared identifier is reported only once
arch/powerpc/kvm/book3s_32_mmu_host.c:176: error: for each function it appears in.)
arch/powerpc/kvm/book3s_32_mmu_host.c:178: error: expected ';' before 'next_pteg'
arch/powerpc/kvm/book3s_32_mmu_host.c:190: error: label 'next_pteg' used but not defined
make[1]: *** [arch/powerpc/kvm/book3s_32_mmu_host.o] Error 1
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The capability defines have moved causing the auto generated names
of capabilities that apparmor uses in logging to be incorrect.
Fix the autogenerated table source to uapi/linux/capability.h
Reported-by: YanHong <clouds.yan@gmail.com>
Reported-by: Krzysztof Kolasa <kkolasa@winsoft.pl>
Analyzed-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: David Howells <dhowells@redhat.com>
Acked-by: James Morris <james.l.morris@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
alloc_tty_driver was always assumed to succeed. Add code to check the
return value and return -ENOMEM if alloc_tty_driver fails.
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
register_proc_table and unregister_proc_table didn't deal with the
possibility that the *table pointer could be NULL. Check for this and
return if table is NULL.
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
